WO2023121204A1 - 광학계, 이를 포함하는 광학 모듈 및 카메라 모듈 - Google Patents
광학계, 이를 포함하는 광학 모듈 및 카메라 모듈 Download PDFInfo
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- WO2023121204A1 WO2023121204A1 PCT/KR2022/020794 KR2022020794W WO2023121204A1 WO 2023121204 A1 WO2023121204 A1 WO 2023121204A1 KR 2022020794 W KR2022020794 W KR 2022020794W WO 2023121204 A1 WO2023121204 A1 WO 2023121204A1
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- Prior art keywords
- lens
- lens group
- optical system
- equation
- mode
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
- G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
- G02B15/143503—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -+-
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
Definitions
- Embodiments relate to an optical system, an optical module including the same, and a camera module.
- the camera module captures an object and stores it as an image or video.
- the camera module is applied to various applications.
- the camera module may be miniaturized. Accordingly, the camera module is applied to a portable device such as a smart phone, a tablet PC, or a laptop computer.
- the camera module is applied to drones or vehicles.
- the camera module includes an imaging lens that forms an image and an image sensor that converts the formed image into an electrical signal.
- the camera module may perform an autofocus (AF) function of aligning focal lengths of lenses by automatically adjusting a distance between an image sensor and an imaging lens.
- AF autofocus
- the camera module may perform a zooming function of zooming up or zooming out by increasing or decreasing the magnification of a distant object by a zoom lens. .
- the camera module may correct or prevent image stabilization using image stabilization (IS) technology.
- IS image stabilization
- the most important component for the camera module to acquire an image is an imaging lens that forms an image.
- an imaging lens that forms an image.
- interest in high image quality and high resolution is increasing.
- research on an optical system including a plurality of lenses is being conducted.
- research using a plurality of imaging lenses having positive (+) or negative (-) refractive power is being conducted for a high-performance optical system.
- the length of the entire optical system may increase.
- the optical system includes a plurality of lenses
- the position of any one of the plurality of lenses may be controlled.
- the position of a lens group including two or more lenses may be controlled. Accordingly, the optical system may perform a zoom or autofocus (AF) function.
- AF zoom or autofocus
- the lens or the lens group performs the function
- the moving distance of the lens or the lens group may greatly increase. Accordingly, a device including the optical system may require a lot of energy.
- there is a problem in that a design considering the movement distance is required.
- the total length or height of the optical system may be increased by the thickness, interval, or size of the plurality of lenses. Accordingly, the thickness and size of the device including the optical system may increase.
- Embodiments are intended to provide an optical system having improved optical characteristics, an optical module and a camera module including the same.
- the embodiment is intended to provide an optical system capable of providing images of various magnifications, an optical module and a camera module including the same.
- embodiments are intended to provide an optical system having a small size, an optical module and a camera module including the same.
- embodiments are intended to provide an optical system applicable to a folded camera having a thin thickness, an optical module including the optical system, and a camera module.
- the optical system according to the embodiment includes a first lens group, a second lens group, and a third lens group sequentially arranged along an optical axis from the object side to the sensor side, each including at least one lens, and 1 lens group includes a first lens, a second lens, and a third lens sequentially arranged along the optical axis in a direction from the object side to the sensor side, and the second lens group is arranged in a direction from the object side to the sensor side A fourth lens and a fifth lens are sequentially disposed along the optical axis, and the third lens group comprises a sixth lens and a seventh lens sequentially disposed along the optical axis in a direction from the object side to the sensor side.
- the second lens group and the third lens group are movable in a direction toward the sensor (a first mode) and movable in a direction toward the object (a third mode), and the third lens group has negative (-) refractive power, the fourth lens has positive (+) refractive power, the fifth lens has negative (-) refractive power, and the third lens and the fourth lens have glass Including, the optical system satisfies the following equation.
- an optical system, an optical module, and a camera module have improved optical characteristics.
- the effective focal length (EFL) may be controlled by moving at least one of the plurality of lens groups. Accordingly, an image having a desired magnification may be obtained.
- the embodiment minimizes the moving distance of the moving lens group. Accordingly, power consumption required when moving the lens group may be reduced.
- the embodiment has a constant TTL regardless of the magnification in the first to third modes. Accordingly, the optical system and the camera module including the same have a slim size.
- At least one of the lens of the optical system and the camera module according to the embodiment has a non-circular shape. Accordingly, the optical system has improved optical performance. Also, the optical system has a small size.
- the optical system and the camera module according to the embodiment include a light path changing member. Accordingly, the optical system can be applied to a folded camera having a small thickness.
- a device including the camera module may be manufactured with a thin thickness.
- FIG. 1 is a configuration diagram of an optical system according to an embodiment operating in a first mode.
- TTL total track length
- BFL back focal length
- FIG. 3 is a configuration diagram of an optical system according to an embodiment operating in a second mode.
- TTL Total track length
- BFL Back focal length
- FIG. 5 is a configuration diagram of an optical system according to an embodiment operating in a third mode.
- TTL total track length
- BFL back focal length
- FIG. 7 is a view for explaining a lens having a non-circular shape.
- 19 is a graph of an aberration diagram when the optical system according to the first embodiment operates in the first mode.
- 20 is a graph of MTF characteristics when the optical system according to the first embodiment operates in the second mode.
- 21 is a graph of an aberration diagram when the optical system according to the first embodiment operates in the second mode.
- FIG. 23 is a graph of an aberration diagram when the optical system according to the first embodiment operates in the third mode.
- 24 to 29 are tables for explaining the first to eighth lenses of the optical system according to the second embodiment.
- FIG. 30 is a diagram illustrating that a camera module according to an embodiment is applied to a mobile terminal.
- the singular form may also include the plural form unless otherwise specified in the phrase, and in the case of “at least one (or more than one) of A and (and) B and C”, A, B, and C are combined. may include one or more of all possible combinations.
- terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component.
- a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected to, combined with, or connected to the other component, but also with the component. It may also include the case of being 'connected', 'combined', or 'connected' due to another component between the other components.
- top (top) or bottom (bottom) is not only when two components are in direct contact with each other, but also It also includes cases where one or more other components are formed or disposed between two components.
- up (up) or down (down) it may include the meaning of not only the upward direction but also the downward direction based on one component.
- a first lens means a lens closest to the object side.
- the last lens means the lens closest to the sensor side.
- the units of the lens radius, effective diameter, thickness, distance, BFL (Back Focal Length), and TTL (Total track length or Total Top Length) are millimeters (mm).
- the shape of the lens is based on the optical axis of the lens. For example, that the object-side surface of the lens is convex means that the optical axis portion of the lens object-side surface is convex. That is, it does not mean that the periphery of the optical axis of the object-side surface of the lens is convex.
- the peripheral portion of the optical axis of the object-side surface of the lens may be concave.
- the thickness and radius of curvature of the lens were measured based on the optical axis of the lens.
- the object-side surface is defined as a surface of a lens facing the object side based on the optical axis.
- the sensor side (Image side) is defined as a surface of the lens facing the imaging surface based on the optical axis.
- the thickness of the edge of the lens described below may be the thickness at the non-de-cut corner.
- an optical system 1000 includes a plurality of lenses.
- the optical system 1000 includes 8 lenses.
- the embodiment is not limited thereto.
- the optical system 1000 includes 8 lenses.
- the optical system 1000 includes a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and a 7th lens. It includes a lens 170 and an eighth lens 180 .
- the first lens 110 to the eighth lens 180 are sequentially disposed from the object side to the sensor side.
- the first lens 110 to the eighth lens 180 are sequentially disposed along the optical axis OA. Accordingly, the centers of the first lens 110 to the eighth lens 180 may coincide with the optical axis OA of the optical system 1000 .
- Light corresponding to object information passes through the first lens 110 to the eighth lens 180 and is incident on the image sensor unit 300 .
- Each of the first lens 110 to the eighth lens 180 includes an effective area and an ineffective area.
- the effective area is defined as an area where optical characteristics are implemented in the first lens 110 to the eighth lens 180 .
- the effective area is an area through which the light passes. Also, the effective area is an area where incident light is refracted.
- the effective area may be an effective mirror of the first lens 110 to the eighth lens 180 .
- the non-effective area is disposed in the periphery of the effective area. That is, an area other than the effective area of the first lens 110 to the eighth lens 180 is an ineffective area.
- the ineffective area may be an area in which the light is not incident.
- the non-effective area may be an area unrelated to the optical characteristics.
- the ineffective area may be an area where the light is incident but has no optical characteristics.
- the non-effective area may be an area fixed to a barrel (not shown) accommodating the lens. That is, the ineffective area may be a flange portion fixed to the barrel.
- the size of the effective area may have a measurement error of about ⁇ 0.4 mm depending on a measurement method or the like.
- the size of the effective area may be 2 mm or less, 1 mm or less, or 0.3 mm or less of the inner diameter of the flange portion.
- the optical system 1000 may include an aperture (not shown) for adjusting the amount of incident light.
- the diaphragm may be disposed between two adjacent lenses among the first lens 110 to the eighth lens 180 .
- the diaphragm may be disposed between the third lens 130 and the fourth lens 140 .
- At least one lens of the first lens 110 to the eighth lens 180 may serve as a diaphragm.
- an object-side surface or a sensor-side surface of the lens may serve as a diaphragm.
- the object-side surface of the fourth lens 140 may serve as a diaphragm.
- the optical system 1000 forms an optical module 2000 .
- the optical module 2000 includes the optical system 1000, a light path changing member disposed in front of the optical system 1000, an image sensor unit 300 disposed behind the optical system 1000, and a filter unit ( 500) may be included.
- the image sensor unit 300 detects light.
- the image sensor unit 300 detects light sequentially passing through the first lens 110 to the eighth lens 180 .
- the image sensor unit 300 may include a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).
- CCD charge coupled device
- CMOS complementary metal oxide semiconductor
- the filter unit 500 is disposed between the optical system 1000 and the image sensor unit 300 .
- the filter part 500 is disposed between the image sensor 300 and a lens closest to the image sensor part 300 . That is, the filter unit 500 is disposed between the eighth lens 180 and the image sensor 300 .
- the filter unit 500 may include an infrared filter or an optical filter.
- the filter unit 500 passes light of a set wavelength band.
- the filter unit 500 filters light of an unset wavelength band.
- the filter unit 500 includes an infrared filter, it is possible to block radiant heat emitted from external light from being transferred to the image sensor unit 300 .
- the filter unit 500 may transmit visible light and reflect infrared light.
- the optical module 2000 may include a light path changing member (not shown).
- the light path changing member reflects light incident from the outside. This changes the path of the light.
- the light path changing member may include a reflector or a prism.
- the light path changing member may include a right angle prism. Accordingly, the light path changing member may reflect the path of the incident light at an angle of 90°. In this way, the path of light can be changed.
- the light path changing member may be disposed closer to the object side than the plurality of lenses.
- the optical module 2000 includes the light path changing member, a light path changing member, a first lens 110, a second lens 120, a third lens 130, and a fourth The lens 140, the fifth lens 150, the sixth lens 160, the seventh lens 170, the eighth lens 180, the filter unit 500, and the image sensor unit 300 are sequentially disposed.
- the light path changing member changes a path of light incident from the outside in a set direction.
- the light path changing member may change a path of light incident in a first direction to a second direction in which the plurality of lenses are disposed.
- the second direction may be an optical axis direction.
- the optical module 2000 may be applied to a folded camera.
- the optical module 2000 includes the light path changing member
- light incident in a direction perpendicular to the surface of the electronic device to which the optical module 2000 is applied is changed into a direction parallel to the surface of the electronic device.
- the optical module 2000 may have a thin thickness. Accordingly, the electronic device may be formed with a small thickness.
- the lenses of the optical system 1000 may move forward and backward along the optical axis. In detail, at least one of the lenses may move toward the object side or the sensor side along the optical axis direction. Accordingly, the optical system 1000 and the optical module 2000 can adjust the focal length in the low magnification mode and the high magnification mode.
- the lenses are divided into a plurality of lens groups.
- the lenses are divided into a first lens group G1 defined as a non-moving fixed lens group, and a second lens group G2 and a third lens group G3 defined as a moving moving group lens.
- the first lens group G1 includes at least one lens.
- the first lens group G1 includes a plurality of lenses.
- the first lens group G1 includes a plurality of lenses spaced apart from each other at set intervals.
- the first lens group G1 may include the first lens 110, the second lens 120, and the third lens 130 spaced apart from each other.
- Intervals between the plurality of lenses of the first lens group G1 do not change and are fixed by operation changes of the first mode to the third mode.
- the distance between the first lens 110 and the second lens 120 is not changed by the change in operation of the first mode to the third mode.
- the distance between the second lens 120 and the third lens 130 is not changed by the change in the operation of the first mode to the third mode.
- the interval between the plurality of lenses is defined as the distance between centers of adjacent lenses in the optical axis (OA) direction.
- the second lens group G2 includes at least one lens.
- the second lens group G2 includes a plurality of lenses.
- the number of lenses in the first lens group G1 and the number of lenses in the second lens group G2 may be the same or different.
- the number of lenses of the second lens group G2 may be smaller than the number of lenses of the first lens group G1.
- the second lens group G2 includes a plurality of lenses spaced apart from each other at set intervals.
- the second lens group G2 may include the fourth lens 140 and the fifth lens 150 spaced apart from each other.
- Intervals between the plurality of lenses of the second lens group G2 are fixed without being changed by operation changes of the first mode to the third mode.
- the distance between the fourth lens 140 and the fifth lens 150 does not change according to the operation of the first mode to the third mode.
- the interval between the plurality of lenses is defined as the distance between centers of adjacent lenses in the optical axis (OA) direction.
- the third lens group G3 includes at least one lens.
- the third lens group G3 includes a plurality of lenses.
- the number of lenses in the third lens group G3 and the number of lenses in the second lens group G2 may be the same or different.
- the number of lenses of the third lens group G3 may be greater than the number of lenses of the second lens group G2.
- the third lens group G3 includes a plurality of lenses spaced apart at set intervals.
- the third lens group G3 may include the sixth lens 160, the seventh lens 170, and the eighth lens 180 spaced apart from each other.
- Intervals between the plurality of lenses of the third lens group G3 are fixed without being changed by operation changes of the first mode to the third mode.
- the interval between the sixth lens 160 and the seventh lens 170 is not changed by the change in the operation of the first mode to the third mode.
- the distance between the seventh lens 170 and the eighth lens 180 is not changed by the change in operation of the first mode to the third mode.
- the interval between the plurality of lenses is defined as the distance between centers of adjacent lenses in the optical axis (OA) direction.
- the second lens group G2 and the third lens group G3 move.
- the second lens group G2 and the third lens group G3 move along the optical axis direction.
- the second lens group G2 and the third lens group G3 move closer to the first lens group G1 or the image sensor unit 300 along the optical axis direction. That is, the second lens group G2 and the third lens group G3 move closer to the object side or the sensor side along the optical axis direction.
- a driving member (not shown) is connected to the optical system 1000 .
- the second lens group G2 and the third lens group G3 may move along the optical axis direction by the driving force of the driving member.
- the driving member may move the second lens group G2 and the third lens group G3 by changing the first mode to the third mode. Accordingly, the distance between the first lens group G1 and the second lens group G2, the distance between the first lens group G1 and the third lens group G3, and the second lens group At least one of the distance between G2 and the image sensor unit 300 and the distance between the third lens group G2 and the image sensor unit 300 is changed and the distance is controlled.
- the magnification of the first mode may mean a magnification of 4.8 times when an angle of view of 85° is multiplied by one.
- the magnification of the second mode may mean a magnification of 6 times when the angle of view of 85° is 1 time.
- the magnification of the third mode may mean a magnification of 8.5 times when an angle of view of 85° is multiplied by one.
- the first lens group G1 may be fixed.
- the second lens group G2 and the third lens group G3 may be movable by the driving member. In this case, intervals between the lenses of the first lens group G1, the second lens group G2, and the third lens group G3 may not change.
- the distance between the fourth lens 140 and the fifth lens 150 of the second lens group G2 , the distance between the sixth lens 160 and the seventh lens 170 and the distance between the seventh lens 170 and the eighth lens 180 of the third lens group G3 are the driving force can be fixed regardless of Accordingly, the total track length (TTL) of the optical module 2000 is maintained. Also, a back focal length (BFL) of the optical module 2000 is changed by the driving force.
- the optical module 2000 may change from the first mode to the second mode.
- the optical module 2000 may change from the first mode to the third mode.
- the optical module 2000 may change from the second mode to the third mode.
- the second lens group G2 and the third lens group G3 may move in the direction of the first lens group G1 in the image sensor unit 300 .
- the second lens group G2 and the third lens group G3 may move to positions adjacent to the first lens group G1.
- the optical module 2000 may change from the third mode to the first mode.
- the optical module 2000 may change from the third mode to the second mode.
- the optical module 2000 may change from the second mode to the first mode.
- the second lens group G2 and the third lens group G3 may move toward the image sensor unit 300 from the first lens group G1.
- the second lens group G2 and the third lens group G3 may move to positions adjacent to the image sensor unit 300 .
- the composite focal length of the first lens 110 and the second lens 120 may be maintained. Also, the composite focal length of the second lens 120 and the third lens 130 may be maintained. Also, the composite focal length of the first lens 110, the second lens 120, and the third lens 130 may be maintained.
- the composite focal length of the fourth lens 140 and the fifth lens 120 may be maintained.
- the composite focal distance of the sixth lens 160 and the seventh lens 170 may be maintained.
- the composite focal length of the seventh lens 170 and the eighth lens 180 may be maintained.
- the composite focal length of the sixth lens 160, the seventh lens 170, and the eighth lens 180 may be maintained.
- the focal lengths of the third lens 130 and the fourth lens 140 may change.
- the focal lengths of the second lens 120, the third lens 130, and the fourth lens 140 may change.
- the focal lengths of the third lens 130, the fourth lens 140, and the fifth lens 150 may change.
- the focal lengths of the first lens 110, the second lens 120, the third lens 130, and the fourth lens 140 may change.
- the focal lengths of the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens 150 may change.
- the focal lengths of the fifth lens 150 and the sixth lens 160 may change.
- the focal lengths of the fourth lens 140, the fifth lens 150, and the sixth lens 160 may change.
- the focal lengths of the fifth lens 150, the sixth lens 160, and the seventh lens 170 may change.
- the focal lengths of the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 may change.
- the focal lengths of the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 may change.
- the position of at least one lens group among the plurality of lens groups G1 , G2 , and G3 is controlled. Accordingly, the distance between the lens groups G1 , G2 , and G3 , the effective focal length (EFL) of the optical system 1000 , and the composite focal length of the plurality of lenses may be changed. Accordingly, the camera module can control the effective focal length (EFL).
- the camera module may provide a zoom function for a subject at low magnification, medium magnification, and high magnification.
- the focused focal length (EFL) of the optical system is changed by the movement of the second lens group G2 and the third lens group G3.
- the effective focal length of the first mode may be 13 mm to 14 mm.
- the effective focal length of the second mode may be 20 mm to 21 mm.
- the effective focal length of the third mode may be 28 mm to 29 mm.
- the effective focal length (EFL) of the optical system may vary from 13 mm to 29 mm.
- the first lens group G1, the second lens group G2, and the third lens group G3 have different refractive powers.
- the first lens group G1 may have negative (-) refractive power.
- the second lens group G2 may have positive (+) refractive power.
- the third lens group G3 may have negative (-) refractive power.
- the first lens group G1, the second lens group G2, and the third lens group G3 have different focal lengths.
- the first lens group G1 and the second lens group G2 have refractive powers of opposite signs. Accordingly, the focal length of the second lens group G2 and the focal length of the first lens group G1 have opposite signs.
- the second lens group G2 and the third lens group G3 have refractive powers of opposite signs. Accordingly, the focal length of the second lens group G2 and the focal length of the third lens group G3 have opposite signs.
- the first lens group G1 and the third lens group G3 have refractive powers of the same sign. Accordingly, the focal length of the first lens group G1 has the same sign as the focal length of the third lens group G3.
- lenses included in the first lens group G1, the second lens group G2, and the third lens group G3 will be described.
- the first lens 110 may have positive (+) refractive power along the optical axis.
- the first lens 110 may include a plastic or glass material.
- the first lens 110 may include a plastic material.
- the first lens 110 includes a first surface S1 defined as an object side surface and a second surface S2 defined as a sensor side surface.
- the first surface S1 may be convex with respect to the object-side surface on the optical axis.
- the second surface S2 may be concave with respect to the sensor-side surface in the optical axis. That is, the first lens 110 as a whole may have a meniscus shape convex from the optical axis toward the object side.
- At least one of the first surface S1 and the second surface S2 may be an aspherical surface.
- both the first surface S1 and the second surface S2 may be aspheric surfaces.
- the size of the effective diameter of the first surface S1 and the size of the effective diameter of the second surface S2 may be different.
- the size of the effective diameter of the first surface S1 may be greater than the size of the effective diameter of the second surface S2.
- the second lens 120 may have positive (+) refractive power along the optical axis.
- the second lens 120 may include a plastic or glass material.
- the second lens 120 may include a plastic material.
- the second lens 120 includes a third surface S3 defined as an object side surface and a fourth surface S4 defined as a sensor side surface.
- the third surface S3 may be convex with respect to the object-side surface on the optical axis.
- the fourth surface S4 may be convex with respect to the sensor-side surface on the optical axis. That is, the second lens 120 as a whole may have a meniscus shape convex from the optical axis toward the object side.
- At least one of the third and fourth surfaces S3 and S4 may be an aspherical surface.
- both the third surface S3 and the fourth surface S4 may be aspheric.
- the size of the effective diameter of the third surface S3 and the size of the effective diameter of the fourth surface S4 may be different.
- the size of the effective diameter of the third surface S3 may be greater than the size of the effective diameter of the fourth surface S4.
- the third lens 130 may have negative (-) refractive power on the optical axis.
- the third lens 130 may include a plastic or glass material.
- the third lens 130 may include a glass material.
- the third lens 130 includes a fifth surface S5 defined as an object side surface and a sixth surface S6 defined as a sensor side surface.
- the fifth surface S5 may be concave with respect to the object-side surface on the optical axis.
- the sixth surface S6 may be concave with respect to the sensor side in the optical axis. That is, the third lens 130 may have a concave shape on both sides of the optical axis as a whole.
- At least one of the fifth surface S5 and the sixth surface S6 may be an aspheric surface.
- both the fifth surface S5 and the sixth surface S6 may be aspheric surfaces.
- the size of the effective diameter of the fifth surface S5 and the effective diameter of the sixth surface S6 may be different.
- the size of the effective diameter of the fifth surface S5 may be greater than the size of the effective diameter of the sixth surface S6.
- the fourth lens 140 may have positive (+) refractive power on the optical axis.
- the fourth lens 140 may include a plastic or glass material.
- the fourth lens 140 may include glass.
- the fourth lens 140 includes a seventh surface S7 defined as an object side surface and an eighth surface S8 defined as a sensor side surface.
- the seventh surface S7 may be convex with respect to the object-side surface on the optical axis.
- the eighth surface S8 may be convex with respect to the side of the sensor on the optical axis. That is, the fourth lens 140 may have a shape in which both sides are convex in the optical axis as a whole.
- At least one of the seventh surface S7 and the eighth surface S8 may be an aspheric surface.
- both the seventh surface S7 and the eighth surface S8 may be aspheric surfaces.
- the size of the effective diameter of the seventh surface S7 may be different from the size of the effective diameter of the eighth surface S8.
- the size of the effective diameter of the seventh surface S7 may be greater than the size of the effective diameter of the eighth surface S8.
- the fifth lens 150 may have negative (-) refractive power on the optical axis.
- the fifth lens 150 may include a plastic or glass material.
- the fifth lens 150 may include a plastic material.
- the fifth lens 150 includes a ninth surface S9 defined as an object side surface and a tenth surface S10 defined as a sensor side surface.
- the ninth surface S9 may be convex with respect to the object-side surface on the optical axis.
- the tenth surface S10 may be concave with respect to the sensor side in the optical axis. That is, the fifth lens 150 may have a meniscus shape convex from the optical axis toward the object as a whole.
- At least one of the ninth surface S9 and the tenth surface S10 may be an aspherical surface.
- both the ninth surface S9 and the tenth surface S10 may be aspheric surfaces.
- the size of the effective diameter of the ninth surface S9 and the effective diameter of the tenth surface S10 may be different.
- the effective diameter of the ninth surface S9 may be greater than the effective diameter of the tenth surface S10.
- the sixth lens 160 may have positive (+) refractive power on the optical axis.
- the sixth lens 160 may include a plastic or glass material.
- the sixth lens 160 may include a plastic material.
- the sixth lens 160 includes an eleventh surface S11 defined as an object side surface and a twelfth surface S12 defined as a sensor side surface.
- the eleventh surface S11 may be concave with respect to the object-side surface in the optical axis.
- the twelfth surface S12 may be convex with respect to the sensor side in the optical axis. That is, the sixth lens 160 may have a meniscus shape convex from the optical axis toward the sensor as a whole.
- At least one of the eleventh surface S11 and the twelfth surface S12 may be an aspherical surface.
- both the 11th surface S11 and the 12th surface S12 may be aspherical surfaces.
- the size of the effective diameter of the 11th surface S11 and the size of the effective diameter of the 12th surface S12 may be different.
- the size of the effective diameter of the 11th surface S11 may be smaller than the size of the effective diameter of the 12th surface S12.
- the seventh lens 170 may have negative (-) refractive power on the optical axis.
- the seventh lens 170 may include a plastic or glass material.
- the seventh lens 170 may include a plastic material.
- the seventh lens 170 includes a thirteenth surface S13 defined as an object side surface and a fourteenth surface S14 defined as a sensor side surface.
- the thirteenth surface S13 may be concave with respect to the object-side surface in the optical axis.
- the fourteenth surface S14 may be convex with respect to the sensor side in the optical axis. That is, the seventh lens 170 may have a meniscus shape convex from the optical axis toward the sensor as a whole.
- At least one of the thirteenth surface S13 and the fourteenth surface S14 may be an aspherical surface.
- both the thirteenth surface S13 and the fourteenth surface S14 may be aspheric surfaces.
- the size of the effective diameter of the thirteenth surface S13 and the size of the effective diameter of the fourteenth surface S14 may be different.
- the size of the effective diameter of the thirteenth surface S13 may be greater than the size of the effective diameter of the fourteenth surface S14.
- the eighth lens 180 may have positive (+) refractive power along the optical axis.
- the eighth lens 180 may include a plastic or glass material.
- the eighth lens 180 may include a plastic material.
- the eighth lens 180 includes a fifteenth surface S15 defined as an object side surface and a sixteenth surface S16 defined as a sensor side surface.
- the fifteenth surface S15 may be concave with respect to the object-side surface in the optical axis.
- the sixteenth surface S16 may be convex with respect to the sensor side in the optical axis. That is, the eighth lens 180 may have a meniscus shape convex from the optical axis toward the sensor as a whole.
- At least one of the fifteenth surface S15 and the sixteenth surface S16 may be an aspherical surface.
- both the fifteenth surface S15 and the sixteenth surface S16 may be aspheric surfaces.
- the size of the effective diameter of the fifteenth surface S15 and the effective diameter of the sixteenth surface S16 may be different.
- the effective diameter of the fifteenth surface S15 may be smaller than the effective diameter of the sixteenth surface S16.
- At least one lens among the plurality of lenses may have a non-circular shape.
- at least one of the lenses of the first lens group G1 may have a non-circular shape.
- at least one of the lenses of the second lens group G2 may have a non-circular shape.
- at least one of the lenses of the third lens group G3 may have a non-circular shape.
- the first lens 110 may have a non-circular shape.
- the first surface S1 and the second surface S2 may have a non-circular shape. That is, when each of the first surface S1 and the second surface S2 is viewed from the front corresponding to the optical axis OA, the effective area of each lens surface may have a non-circular shape.
- the eighth lens 180 may have a non-circular shape.
- the fifteenth surface S15 and the sixteenth surface S16 may have a non-circular shape. That is, when each of the fifteenth surface S15 and the sixteenth surface S16 is viewed from the front corresponding to the optical axis OA, the effective area of each lens surface may have a non-circular shape.
- the second lens 120 may have a circular or non-circular shape. That is, the third surface S3 and the fourth surface S4 may have circular or non-circular shapes. That is, when each of the third and fourth surfaces S3 and S4 is viewed from the front corresponding to the optical axis OA, the effective area of each lens surface may have a circular or non-circular shape.
- the third lens 130 may have a circular shape. That is, the fifth surface S5 and the sixth surface S6 may have a circular shape. That is, when each of the fifth surface S5 and the sixth surface S6 is viewed from the front corresponding to the optical axis OA, the effective area of each lens surface may have a circular shape.
- the fourth lens 140 and the fifth lens 150 may have circular or non-circular shapes. That is, the seventh surface S7, the eighth surface S8, the ninth surface S9, and the tenth surface S10 may have circular or non-circular shapes. That is, when each of the 7th surface S7, 8th surface S8, 9th surface S9 and 10th surface S10 is viewed from the front corresponding to the optical axis OA, each lens surface The effective area may have a circular or non-circular shape.
- the sixth lens 160 and the seventh lens 170 may have circular or non-circular shapes. That is, the 11th surface S11, the 12th surface S12, the 13th surface S13, and the 14th surface S14 may have a circular or non-circular shape. That is, when each of the 11th surface S11, 12th surface S12, 13th surface S13, and 14th surface S14 is viewed from the front corresponding to the optical axis OA, each lens surface The effective area may have a circular or non-circular shape.
- FIG. 7 is a view for explaining a lens having a non-circular shape.
- the first lens 110 is mainly described for convenience of description.
- each effective area of the first surface S1 and the second surface S2 includes first to fourth corners A1 , A2 , A3 , and A4 .
- the first edge A1 and the second edge A2 face each other in a first direction (x-axis direction) perpendicular to the optical axis OA.
- the first edge A1 and the second edge A2 may have a curved shape.
- the first edge A1 and the second edge A2 may have a curved shape having the same length or the same curvature. That is, the first edge A1 and the second edge A2 may be symmetric based on an imaginary line passing through the optical axis OA and extending in the second direction (y-axis direction).
- the second direction (y-axis direction) is perpendicular to the optical axis OA and the first direction.
- the third edge A3 and the fourth edge A4 face each other in the second direction (y-axis direction).
- the third edge A3 and the fourth edge A4 connect the ends of the first edge A1 and the second edge A2.
- the third edge A3 and the fourth edge A4 may have a straight line shape.
- the third edge A3 and the fourth edge A4 may have the same length and be parallel to each other. That is, the third edge A3 and the fourth edge A4 may be symmetric based on an imaginary line passing through the optical axis OA and extending in the first direction (x-axis direction).
- the first surface S1 and the second surface S2 include the first to fourth edges A1, A2, A3, and A4. Accordingly, it may have a non-circular shape (eg, a D-cut shape).
- the first surface S1 and the second surface S2 may have the non-circular shape in the process of manufacturing the first lens 110 .
- the first lens 110 may be manufactured in the non-circular shape during an injection process.
- the first lens 110 may be manufactured in a circular shape by an injection process. In a subsequent cutting process, portions of the first and second surfaces S1 and S2 may be cut. Accordingly, the first lens 110 may have the third corner A3 and the fourth corner A4.
- each effective area of the first surface S1 and the second surface S2 may have a set size.
- a length CA of an imaginary first straight line passing through the optical axis OA and connecting the first edge A1 and the second edge A2 may be defined.
- a length CH of an imaginary second straight line passing through the optical axis OA and connecting the third edge A3 and the fourth edge A4 may be defined.
- the length CA of the imaginary first straight line may be longer than the length CH of the imaginary second straight line.
- the length CA of the first straight line means the size of the maximum effective diameter of each of the first and second surfaces S1 and S2.
- the length CH of the second straight line means the size of the minimum effective diameter of each of the first surface S1 and the second surface S2.
- the sizes of the minimum effective diameters of the first lens group G1, the second lens group G2, and the third lens group G3 may be different from each other.
- the size of the minimum effective diameter of the first lens group G1 may be larger than the sizes of the minimum effective diameter of the second lens group G2 and the third lens group G3.
- the size of the minimum effective diameter of the first lens group G1 may be about 5.0 mm to about 5.4 mm.
- the size of the minimum effective diameter of the second lens group G2 and the third lens group G3 may be about 4.0 mm to about 4.4 mm.
- the optical system 1000 and the optical module 2000 according to the embodiment may satisfy at least one of the following equations. Accordingly, the optical system 1000 and the optical module 2000 according to the embodiment may improve aberration characteristics. Therefore, it has improved optical properties. In addition, the embodiment can effectively provide a zoom function for a desired magnification. In addition, it may have a slim and compact size.
- the CA_L4S1 is the maximum effective diameter of the object-side surface of the fourth lens.
- the CA_L1S1 is the maximum effective diameter of the object-side surface of the first lens.
- Equation 1 is related to the de-cut ratio of the second lens group.
- the de-cut ratio of the fourth lens may be reduced.
- V4 is the Abbe number of the fourth lens.
- V5 is the Abbe number of the fifth lens.
- Equation 2 is related to the chromatic aberration of the optical system.
- the optical system according to the embodiment satisfies Equation 2 above, chromatic aberration can be reduced.
- the V6 is the Abbe's number of the sixth lens.
- the V8 is the Abbe's number of the eighth lens.
- Equation 3 is related to the chromatic aberration of the optical system.
- the optical system according to the embodiment satisfies Equation 3 above, chromatic aberration can be reduced.
- the f123 is the composite focal length of the first lens, the second lens, and the third lens.
- Equation 4 above is related to the size of the optical system and the peripheral light ratio (RI) of the optical system.
- the peripheral light amount ratio of the optical system can be reduced.
- the diameters of the lenses may be reduced. Accordingly, the optical system may have a compact size.
- the BFL_1 is the distance in the optical axis direction from the apex of the sensor-side surface of the last lens to the top surface of the image sensor when the second lens group and the third lens group move at the maximum movement distance in the first mode.
- Equation 5 is related to the size of the internal space of the optical system.
- the optical system according to the embodiment satisfies Equation 5 above, space for circuits and mechanism structures can be secured.
- Equation 5 above may satisfy 1 ⁇ BFL1_1 ⁇ 5.
- the f3 is the focal length of the third lens.
- Equation 6 is related to the power of the first lens group and the entrance pupil size of the second lens group. If the optical system according to the embodiment satisfies Equation 6 above, the first lens group may have negative (-) refractive power within a set range. In addition, the entrance pupil diameter of the lenses of the second lens group may be satisfied within the set range.
- the f4 is the focal length of the fourth lens.
- Equation 7 is related to the lens diameter of the second lens group.
- the diameter of the fourth lens may be minimized.
- the f5 is the focal length of the fifth lens.
- Equation 8 is related to the chromatic aberration of the second lens group of the optical system.
- chromatic aberration of the second lens group may be reduced. Accordingly, it is possible to minimize a change in chromatic aberration in the first mode to the third mode.
- the total track length (TTL) is the distance along the optical axis from the object-side surface of the first lens to the top surface of the image sensor unit.
- the center of the image surface of the image sensor unit may be defined as a 0 field area.
- the ImgH means a value twice the vertical distance of the optical axis OA from the 0 field area to the 1.0 field area, that is, the diagonal direction length of the effective area of the image sensor unit. it means.
- Equation 9 is related to the size of the optical system.
- the distance between the first lens and the image sensor unit may be controlled within a set range.
- the optical system can have a compact size.
- the md1 is the movement distance of the second lens group when changing from the first mode to the third mode or from the third mode to the first mode.
- the md2 is the movement distance from the first mode to the third mode. , or the moving distance of the third lens group when changing from the third mode to the first mode.
- Equation 10 is related to the size of the optical system.
- the optical system according to the embodiment satisfies Equation 10
- the movement distances of the second lens group and the third lens group may be controlled within a set range.
- the optical system can have a compact size.
- the BFL_1 is the distance in the optical axis direction from the apex of the sensor-side surface of the last lens to the top surface of the image sensor when the second lens group and the third lens group move at the maximum movement distance in the first mode.
- the BFL_2 is the distance in the optical axis direction from the apex of the sensor-side surface of the last lens to the top surface of the image sensor unit when the second lens group and the third lens group move by the maximum movement distance in the third mode.
- Equation 11 is related to the size of the optical system.
- the size of the BFL according to the moving distances of the second lens group and the third lens group may be controlled within a set range.
- the optical system can have a compact size.
- the EFL_1 is the effective focal length in the first mode.
- the EFL_2 is the effective focal length in the second mode.
- Equation 12 above is related to the magnification of the optical system.
- the optical system according to the embodiment satisfies Equation 12
- images of low magnification or high magnification can be realized by the moving distances of the second lens group and the third lens group.
- the F_1 is the F-number in the first mode.
- the F_2 is the F-number in the third mode.
- Equation 13 is related to the resolution of the optical system.
- the optical system according to the embodiment satisfies Equation 13
- resolution within the range set in the first mode and the third mode can be implemented.
- N3 N1, N2, N4, N5, N6, N7, N8
- N1 is the refractive index of the first lens.
- N2 is the refractive index of the second lens.
- N3 is the refractive index of the third lens.
- N4 is the refractive index of the fourth lens.
- N5 is the refractive index of the third lens.
- 5 is the refractive index of the lens.
- N6 is the refractive index of the sixth lens.
- N7 is the refractive index of the seventh lens.
- N8 is the refractive index of the eighth lens.
- Equation 14 is related to chromatic aberration and distortion aberration of the optical system.
- chromatic aberration and distortion aberration may be reduced in the first mode to the third mode.
- N3 is the refractive index of the third lens.
- N4 is the refractive index of the fourth lens.
- Equation 15 is related to chromatic aberration and distortion aberration of the optical system.
- chromatic aberration and distortion aberration may be reduced in the first mode to the third mode.
- V4 - V5 > V8 - V6;
- V4 - V5 > V3 - V1
- V1 is the Abbe number of the first lens.
- V3 is the Abbe number of the third lens.
- V4 is the Abbe number of the fourth lens.
- V5 is the Abbe number of the fifth lens.
- V6 is the Abbe's number of the sixth lens,
- V8 is the Abbe's number of the eighth lens.
- Equation 16 is related to the chromatic aberration of the optical system.
- chromatic aberration may be reduced in the first mode to the third mode.
- CAL3S1 is the maximum effective diameter of the object-side surface of the third lens.
- CAL3S2 is the maximum effective diameter of the sensor-side surface of the third lens.
- Equation 17 is related to the de-cut ratio of the first lens group.
- the de-cut of the third lens may be removed.
- the CT3 is the thickness of the third lens on the optical axis.
- the CG12 is the distance between the first lens and the second lens on the optical axis.
- Equation 18 is related to the optical performance of the optical system.
- the optical performance of the optical system can be maintained.
- the CT4 is the thickness of the fourth lens on the optical axis.
- the CG45 is the distance between the fourth lens and the fifth lens on the optical axis.
- Equation 19 is related to the optical performance of the optical system.
- the optical performance of the optical system can be maintained.
- the CT8 is the thickness of the eighth lens on the optical axis.
- the CG78 is the distance between the seventh and eighth lenses on the optical axis.
- Equation 20 is related to the optical performance of the optical system.
- the optical performance of the optical system can be maintained.
- Equation 21 is related to the size of the optical system.
- the optical system may have a compact size.
- Equation 22 above is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 22, the optical system may have a compact size.
- Equation 23 above is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 23, the optical system may have a compact size.
- CHL1S1 is the minimum effective diameter of the object-side surface of the first lens.
- Equation 24 is related to the de-cut ratio of the first lens group.
- the de-cut ratio of the first lens may be reduced.
- the CAL2S1 is the maximum effective diameter of the object-side surface of the second lens.
- the CHL2S1 is the minimum effective diameter of the object-side surface of the second lens.
- Equation 25 is related to the de-cut ratio of the second lens group.
- the optical system according to the embodiment may reduce the de-cut ratio of the third lens to gaus satisfying Equation 25 above.
- CHL4S1 is the minimum effective diameter of the object-side surface of the fourth lens.
- Equation 26 is related to the de-cut ratio of the second lens group.
- the de-cut ratio of the fourth lens may be reduced.
- CHL5S1 is the minimum effective diameter of the object-side surface of the fifth lens.
- Equation 27 is related to the de-cut ratio of the second lens group.
- the de-cut ratio of the fifth lens may be reduced.
- CHL8S1 is the minimum effective diameter of the object-side surface of the eighth lens.
- Equation 28 is related to the de-cut ratio of the third lens group.
- the de-cut ratio of the eighth lens may be reduced.
- CAL4S1 is the maximum effective diameter of the object-side surface of the fourth lens.
- CAL4S2 is the maximum effective diameter of the sensor-side surface of the fourth lens.
- CAL451 is the maximum effective diameter of the object-side surface of the fifth lens.
- CAL5S2 is the maximum effective diameter of the sensor-side surface of the fifth lens
- CAL7S1 is the maximum effective diameter of the object-side surface of the seventh lens
- CAL7S2 is the maximum effective diameter of the sensor-side surface of the seventh lens
- CAL8S1 This is the maximum effective diameter of the object-side surface of the eighth lens.
- CAL8S2 is the maximum effective diameter of the sensor-side surface of the eighth lens.
- Equation 29 is related to the de-cut ratio of the third lens group.
- the de-cut ratio of the eighth lens may be reduced.
- the f1 is the focal length of the first lens.
- the f3 is the focal length of the third lens.
- Equation 30 is related to the resolving power of the optical system.
- the refractive power of the first lens and the third lens may be controlled. Accordingly, the resolution of the optical system can be improved.
- the f4 is the focal length of the fourth lens.
- the f5 is the focal length of the fifth lens.
- Equation 31 is related to the resolving power of the optical system.
- the refractive power of the fourth lens and the fifth lens may be controlled. Accordingly, the resolution of the optical system can be improved.
- Equation 32 is related to the resolving power of the optical system.
- the refractive power of the first lens, the third lens, the fourth lens, and the fifth lens may be controlled. Accordingly, the resolution of the optical system can be improved.
- the f45 is the composite focal length of the fourth lens and the fifth lens.
- the f678 is the composite focal length of the sixth lens, the seventh lens, and the eighth lens.
- Equation 33 is related to the magnification of the optical system.
- the optical system according to the embodiment satisfies Equation 33, the complex focal lengths of the second lens group and the third lens group may be controlled. Accordingly, it is possible to have an improved resolution at a desired magnification.
- Equation 34 is related to the magnification of the optical system.
- the optical system according to the embodiment satisfies Equation 34, the complex focal lengths of the second lens group and the third lens group can be controlled. Accordingly, it is possible to have an improved resolution at a desired magnification.
- Max_distoriton is the maximum distortion of the optical system.
- the FOV( ⁇ )_1 is an effective angle of view of the optical system in the first mode.
- the FOV( ⁇ )_2 is an effective angle of view of the optical system in the second mode.
- CG34_1 is the distance between the optical axes of the third lens and the fourth lens in the first mode.
- the EG34_1 is the end of the effective area of the third lens and the end of the effective area of the fourth lens in the first mode. is the distance in the optical axis direction
- CG34_2 is the distance in the optical axis of the third lens and the fourth lens in the second mode
- EG34_2 is the distance between the end of the effective area of the third lens and the first 4 It is the distance in the direction of the optical axis at the end of the effective area of the lens.
- Equation 38 is related to the resolving power of the optical system.
- the lens thickness and distance of the first lens group and the second lens group may be controlled. Accordingly, the optical system may have improved resolving power.
- CG56_1 is the distance between the optical axes of the fifth lens and the sixth lens in the first mode.
- the EG56_1 is the end of the effective area of the fifth lens and the end of the effective area of the sixth lens in the first mode. is the distance in the optical axis direction
- CG56_2 is the distance in the optical axis of the fifth lens and the sixth lens in the second mode
- EG56_2 is the distance between the end of the effective area of the fifth lens and the first 6 It is the distance in the direction of the optical axis at the end of the effective area of the lens.
- Equation 39 is related to the resolving power of the optical system.
- the lens thickness and distance of the second lens group and the third lens group may be controlled. Accordingly, the optical system may have improved resolving power.
- Equation 40 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 40, the optical system may have a compact size.
- the F_1 is the F-number in the first mode.
- the F_2 is the F-number in the third mode.
- the EPD_1 is the entrance pupil in the first mode.
- the EPD_2 is the entrance pupil in the third mode.
- Equation 41 is related to the resolving power of the optical system.
- the optical system according to the embodiment satisfies Equation 41, it may have improved resolution in the first mode to the third mode.
- P3 is the refractive power of the third lens.
- P4 is the refractive power of the fourth lens.
- Equation 42 is related to the distortion aberration of the optical system. If the optical system according to the embodiment satisfies Equation 42, distortion aberration of the optical system may be reduced.
- CT_Lx is the thickness of the xth lens on the optical axis.
- the ET_Ly is the thickness of the yth lens at the end of the effective area.
- x is a natural number of 1 ⁇ x ⁇ 8.
- Equation 43 is related to the manufacture of the optical system.
- the optical system according to the embodiment satisfies Equation 43, the ejection characteristics of the lens may be improved. Accordingly, the lens manufacturing process can be facilitated.
- the CH_G1 is the minimum effective diameter of the lenses of the first lens group.
- the CH_G2 is the minimum effective diameter of the lenses of the second lens group.
- the CH_G3 is the minimum effective diameter of the lenses of the third lens group.
- Equation 44 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 44, the optical system may have a compact size. Preferably, Equation 44 above may satisfy 0.4 ⁇ CH_G1 - CH_G2 ⁇ 0.6 and 0.4 ⁇ CH_G1 - CH_G3 ⁇ 0.6.
- Equation 45 is related to the size of the optical system.
- the moving distances of the second lens group and the third lens group can be controlled within a set range. Accordingly, the optical system can have a compact size.
- V4 is the Abbe number of the fourth lens.
- V5 is the Abbe number of the fifth lens.
- Equation 46 is related to the chromatic aberration of the optical system.
- chromatic aberration may be reduced by a difference in Abbe numbers between the fourth lens and the fifth lens.
- R1 is the radius of curvature of the object-side surface of the first lens.
- R2 is the radius of curvature of the sensor-side surface of the first lens.
- R3 is the radius of curvature of the object-side surface of the second lens.
- R4 is the radius of curvature of the sensor-side surface of the second lens
- R5 is the radius of curvature of the object-side surface of the third lens
- R6 is the radius of curvature of the sensor-side surface of the third lens
- R7 is R8 is the radius of curvature of the object-side surface of the fourth lens
- R8 is the radius of curvature of the sensor-side surface of the fourth lens
- R9 is the radius of curvature of the object-side surface of the fifth lens
- R10 is the radius of curvature of the sensor-side surface of the fourth lens 5 is the radius of curvature of the sensor-side surface of the lens
- R11 is the radius of curvature of the object-side surface of the sixth lens
- Equation 47 is related to the optical performance of the optical system. If the optical system according to the embodiment satisfies Equation 47, the optical performance of the optical system can be maintained.
- the TD_G1 is the length of the first lens group.
- the TD_G2 is the length of the second lens group.
- Equation 48 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 48, the optical system may have a compact size.
- the TD_G2 is the length of the second lens group.
- the TD_G3 is the length of the third lens group.
- Equation 49 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 49, the optical system may have a compact size.
- the Ave_ABV is the average of the Abbe numbers of the first to eighth lenses.
- Equation 50 is related to the chromatic aberration of the optical system.
- the optical system according to the embodiment satisfies Equation 50 above, chromatic aberration can be reduced.
- the Ave_Ind is the average of the refractive indices of the first to eighth lenses.
- Equation 51 above is related to the chromatic aberration of the optical system.
- the optical system according to the embodiment satisfies Equation 51 above, chromatic aberration can be reduced.
- the ET_L3 is the thickness at the end of the effective area of the third lens.
- the CT_L3 is the thickness of the third lens along the optical axis.
- Equation 52 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 52, the aberration characteristics may be improved. Thus, the optical system has improved optical properties.
- CT_L1 is the thickness on the optical axis of the first lens.
- ET_L1 is the thickness at the end of the effective area of the first lens.
- Equation 53 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 53 above, the aberration characteristics can be improved. Thus, the optical system has improved optical properties.
- CT_L4 is the thickness on the optical axis of the fourth lens.
- ET_L4 is the thickness at the end of the effective area of the fourth lens.
- Equation 54 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 54 above, the aberration characteristics may be improved. Thus, the optical system has improved optical properties.
- Air_CT_L7 is the distance on the optical axis between the 7th lens and the 8th lens. Air_ET_L7 is the distance between the end of the effective area of the 7th lens and the end of the effective area of the 8th lens.
- Equation 55 is related to the distortion aberration of the optical system.
- the optical system according to the embodiment satisfies Equation 55, distortion aberration can be reduced in the first mode to the third mode.
- Max_dia is the diameter of the lens having the largest effective diameter.
- Min_dia is the diameter of the lens having the smallest effective diameter.
- Equation 56 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 56, the aberration characteristics may be improved. Thus, the optical system has improved optical properties.
- Ave_Dia_G1 is the average effective diameter of the lenses of the first lens group.
- Ave_Dia_G3 is the average effective diameter of the lenses of the third lens group.
- Equation 57 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 57 above, the aberration characteristics may be improved. Thus, the optical system has improved optical properties.
- Rdy_L1_S1 is the radius of curvature of the first surface.
- Rdy_L4_S1 is the radius of curvature of the seventh surface
- Equation 58 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 58, the optical system may have a compact size.
- the Max_CT is the thickness of the lens having the largest thickness along the optical axis.
- the Min_CT is the thickness of the lens having the smallest thickness along the optical axis.
- Equation 59 is related to the size of the optical system. If the optical system according to the embodiment satisfies Equation 59, the optical system may have a compact size.
- the FOV( ⁇ )_1 is an effective angle of view of the optical system in the first mode.
- the FOV( ⁇ )_2 is an effective angle of view of the optical system in the second mode.
- the FOV( ⁇ )_3 is an effective angle of view of the optical system in the third mode.
- Max_CRA_1 is a chief ray of the optical system in the first mode
- Max_CRA_2 is a chief ray of the optical system in the second mode
- Max_CRA_3 is a chief ray of the optical system in the third mode.
- Equation 60 is related to the aberration of the optical system. If the optical system according to the embodiment satisfies Equation 60, the aberration characteristics may be improved. Thus, the optical system has improved optical properties.
- the optical system 1000 and the optical module 2000 according to the embodiment satisfy at least one of the above equations.
- the optical system 1000 and the optical module 2000 may satisfy one or a plurality of equations among Equations 1 to 60.
- Equation 1 to Equation 60 may be independent of each other.
- Equation 1 to Equation 60 may be related to each other.
- the optical system 1000, the optical module 2000, and the camera module including them have improved optical characteristics.
- the embodiment satisfies at least one of Equations 1 to 60. Accordingly, chromatic aberration and distortion aberration may be reduced when images of low magnification, medium magnification, and high magnification are implemented by moving the lens group.
- the optical system 1000, the optical module 2000, and a camera module including them may have a slim size.
- the first lens 110 has positive (+) refractive power.
- the first surface S1 is convex with respect to the object-side surface on the optical axis.
- the second surface S2 is concave with respect to the sensor-side surface on the optical axis.
- the first lens 110 has a meniscus shape convex toward the object side.
- the first surface S1 may be an aspheric surface.
- the second surface S2 may be an aspheric surface.
- the first lens 110 may have a D-cut shape.
- the second lens 120 has positive (+) refractive power.
- the third surface S3 is convex with respect to the object-side surface on the optical axis.
- the fourth surface S4 is concave with respect to the sensor-side surface on the optical axis.
- the second lens 120 has a meniscus shape convex toward the object side.
- the third surface S3 may be an aspheric surface.
- the fourth surface S4 may be an aspheric surface.
- the second lens 120 may have a D-cut shape.
- the third lens 130 has negative (-) refractive power.
- the fifth surface S5 is concave with respect to the object-side surface on the optical axis.
- the sixth surface S6 is concave with respect to the sensor-side surface on the optical axis.
- the third lens 130 has a concave shape on both sides.
- the fifth surface S5 may be an aspherical surface.
- the sixth surface S6 may be an aspherical surface.
- the fourth lens 140 has positive (+) refractive power.
- the seventh surface S7 is convex with respect to the object-side surface on the optical axis.
- the eighth surface S8 is convex with respect to the sensor-side surface on the optical axis.
- the fourth lens 140 has a convex shape on both sides.
- the seventh surface S7 may be an aspheric surface.
- the seventh surface S7 may be an aspherical surface.
- the fourth lens 140 may have a D-cut shape.
- the fifth lens 150 has negative (-) refractive power.
- the ninth surface S9 is convex with respect to the object-side surface on the optical axis.
- the tenth surface S10 is concave with respect to the sensor-side surface in the optical axis.
- the fifth lens 150 has a meniscus shape convex toward the object side.
- the ninth surface S9 may be an aspheric surface.
- the tenth surface S10 may be an aspherical surface.
- the fifth lens 150 may have a D-cut shape.
- the sixth lens 160 has positive (+) refractive power.
- the eleventh surface S11 is concave with respect to the object-side surface in the optical axis.
- the twelfth surface S12 is convex with respect to the sensor-side surface on the optical axis.
- the sixth lens 160 has a meniscus shape convex toward the sensor.
- the eleventh surface S11 may be an aspherical surface.
- the twelfth surface S12 may be an aspherical surface.
- the sixth lens 160 may have a D-cut shape.
- the seventh lens 170 has negative (-) refractive power.
- the thirteenth surface S13 is concave with respect to the object-side surface on the optical axis.
- the fourteenth surface S14 is convex with respect to the sensor-side surface on the optical axis.
- the seventh lens 170 has a meniscus shape convex toward the sensor.
- the thirteenth surface S13 may be an aspherical surface.
- the fourteenth surface S14 may be an aspheric surface.
- the seventh lens 170 may have a D-cut shape.
- the eighth lens 180 has positive (+) refractive power.
- the fifteenth surface S15 is concave with respect to the object-side surface on the optical axis.
- the sixteenth surface S16 is convex with respect to the sensor-side surface on the optical axis.
- the eighth lens 180 has a meniscus shape convex toward the sensor.
- the fifteenth surface S15 may be an aspherical surface.
- the sixteenth surface S16 may be an aspherical surface.
- the eighth lens 180 may have a D-cut shape.
- the first lens group G1 is fixed. Also, the second lens group G2 and the third lens group G3 move. Accordingly, the camera module is driven in the first mode to the third mode to obtain information on the subject. For example, the second lens group G2 and the third lens group G3 are moved to the object side and the sensor side by the driving member. In this way, the camera module acquires information on a subject of low magnification to high magnification.
- the camera module operates in a first mode.
- the first lens group G1 is fixed, and the second lens group G2 and the third lens group G3 are moved by the driving member.
- the second lens group G2 and the third lens group G3 are disposed in a first position.
- the second lens group G2 and the third lens group G3 are positioned at the first move to location That is, the second lens group G2 is disposed in an area spaced apart from the first lens group G1 by a first distance d1 by the driving member.
- the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a second distance d2 by the driving member.
- the first distance d1 is a central distance between the third lens 130 and the fourth lens 140 in the optical axis.
- the second distance d2 is a central distance between the fourth lens 140 and the fifth lens 150 in the optical axis.
- the second lens group G2 and the third lens group G3 do not move. It is placed in the first position. Accordingly, the second lens group G2 is disposed in an area spaced apart from the first lens group G1 by a first distance d1. Also, the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a second interval d2.
- the camera module operates in the second mode.
- the first lens group G1 is fixed, and the second lens group G2 and the third lens group G3 are moved by the driving member.
- the second lens group G2 and the third lens group G3 are disposed in the second position.
- the second lens group G2 and the third lens group G3 are positioned at the second lens group G2. move to location That is, the second lens group G2 is disposed in an area spaced apart from the first lens group G1 by a third distance d3 by the driving member.
- the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a fourth distance d4 by the driving member.
- the third distance d3 is a central distance between the third lens 130 and the fourth lens 140 in the optical axis.
- the fourth distance d4 is a center distance between the fourth lens 140 and the fifth lens 150 in the optical axis.
- the second lens group G2 and the third lens group G3 do not move. It is placed in the second position. Accordingly, the second lens group G2 is disposed in an area spaced apart from the first lens group G1 by a third interval d3. Also, the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a fourth distance d4.
- the camera module operates in the third mode.
- the first lens group G1 is fixed, and the second lens group G2 and the third lens group G3 are moved by the driving member.
- the second lens group G2 and the third lens group G3 are disposed in a third position.
- the second lens group G2 and the third lens group G3 are positioned at the third position. move to location That is, the second lens group G2 is disposed in an area separated from the first lens group G1 by a fifth distance d5 by the driving member.
- the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a sixth distance d6 by the driving member.
- the fifth distance d5 is a central distance between the third lens 130 and the fourth lens 140 in the optical axis.
- the sixth distance d6 is a center distance between the fourth lens 140 and the fifth lens 150 in the optical axis.
- the second lens group G2 and the third lens group G3 do not move. It is placed in the third position. Accordingly, the second lens group G2 is disposed in an area spaced apart from the first lens group G1 by a fifth distance d5. Also, the third lens group G3 is disposed in an area spaced apart from the second lens group G2 by a sixth distance d6.
- the first to third lens groups have effective focal lengths and refractive powers as shown in FIG. 10 .
- the optical system 1000 when operating in the first mode to the third mode, has an effective focal length (EFL), TTL, BFL, angle of view, F number, EPD, and magnification as shown in FIG. 11 .
- the first lens to the eighth lens have the same thickness ratio as shown in FIG. 12 .
- the optical axis thickness/edge thickness of the first lens to the eighth lens of the optical system 1000 is 3 or less.
- the edge thickness/optical axis thickness of the first lens to the eighth lens is 3 or less.
- the optical system 1000 has a small chief ray angle difference between the first mode and the third mode.
- FIG. 14 is a table for explaining aspheric coefficients of the first lens 110 to the eighth lens 180 of the optical system 1000.
- FIG. 15 and 16 are tables for explaining the sag of the first lens 110 to the eighth lens 180 .
- the absolute value of the sag may increase as the first lens 110 to the eighth lens 180 extend from the optical axis to the end of the effective area (effective mirror).
- the first lens 110 to the eighth lens 180 may have a monotonically increasing tendency in which an absolute value of a sag only increases while extending from the optical axis to the end of the effective area (effective mirror).
- an inflection point is not formed on the surfaces of the first lens 110 to the eighth lens 180 . Accordingly, the first lens 110 to the eighth lens 180 can be easily manufactured.
- the de-cut ratio is the ratio before and after the de-cut when the minimum effective diameter of the first lens group G1, the second lens group G2, and the third lens group G3 is satisfied with the set size. means In detail, this is the ratio when the size of the minimum effective diameter of the first lens group G1 is 5.2 mm and the size of the minimum effective diameter of the second lens group G2 and the third lens group G3 is 4.2 mm. That is, the de-cut ratio is defined as the CH/CA value of each lens.
- the optical system 1000 has excellent MTF characteristics in the first mode to the third mode.
- 18 is a graph of MTF characteristics of the optical system 1000 operating in the first mode.
- 20 is a graph of MTF characteristics of the optical system 1000 operating in the second mode.
- 22 is a graph of MTF characteristics of the optical system 1000 operating in the third mode.
- the optical system 1000 has excellent aberration characteristics.
- 19 is a graph of aberration characteristics of the optical system 1000 operating in the first mode.
- 21 is a graph of aberration characteristics of the optical system 1000 operating in the second mode.
- 23 is a graph of aberration characteristics of the optical system 1000 operating in the third mode.
- 19, 21 and 23 are graphs in which spherical aberration, astigmatic field curves, and distortion are measured from left to right.
- the X axis is the focal length (mm) and distortion (%).
- the Y-axis is the height of the image.
- the graph of the spherical aberration is a graph of light in a wavelength band of about 435 nm, about 486 nm, about 546 nm, about 587 nm, and about 656 nm. Also, graphs for astigmatism and distortion aberration are graphs for light in a 546 nm wavelength band.
- the first lens 110 has positive (+) refractive power.
- the first surface S1 is convex with respect to the object-side surface on the optical axis.
- the second surface S2 is concave with respect to the sensor-side surface on the optical axis.
- the first lens 110 has a meniscus shape convex toward the object side.
- the first surface S1 may be an aspheric surface.
- the second surface S2 may be an aspheric surface.
- the first lens 110 may have a D-cut shape.
- the effective diameter of the first lens 110 may be larger than that of other lenses.
- the second lens 120 has positive (+) refractive power.
- the third surface S3 is convex with respect to the object-side surface on the optical axis.
- the fourth surface S4 is convex with respect to the sensor-side surface on the optical axis.
- the second lens 120 has a shape in which both sides are convex.
- the third surface S3 may be an aspherical surface.
- the fourth surface S4 may be an aspherical surface.
- the second lens 120 may have a D-cut shape.
- the third lens 130 has negative (-) refractive power.
- the fifth surface S5 is concave with respect to the object-side surface on the optical axis.
- the sixth surface S6 is concave with respect to the sensor-side surface on the optical axis.
- the third lens 130 has a concave shape on both sides.
- the fifth surface S5 may be an aspherical surface.
- the sixth surface S6 may be an aspherical surface.
- the third lens 130 may have a D-cut shape.
- the fourth lens 140 has positive (+) refractive power.
- the refractive power of the fourth lens is greater than the refractive power of the other lenses.
- the seventh surface S7 is convex with respect to the object-side surface on the optical axis.
- the eighth surface S8 is convex with respect to the sensor-side surface on the optical axis.
- the fourth lens 140 has a convex shape on both sides.
- the seventh surface S7 may be an aspheric surface.
- the seventh surface S7 may be an aspheric surface.
- the fourth lens 140 may have a D-cut shape.
- a diaphragm may be disposed between the third lens 130 and the fourth lens 140 .
- the fifth lens 150 has negative (-) refractive power.
- the ninth surface S9 is concave with respect to the object-side surface on the optical axis.
- the tenth surface S10 is concave with respect to the sensor-side surface in the optical axis.
- the fifth lens 150 has a concave shape on both sides.
- the ninth surface S9 may be an aspheric surface.
- the tenth surface S10 may be an aspherical surface.
- the fifth lens 150 may have a D-cut shape.
- the sixth lens 160 has positive (+) refractive power.
- the eleventh surface S11 is concave with respect to the object-side surface in the optical axis.
- the twelfth surface S12 is convex with respect to the sensor-side surface on the optical axis.
- the sixth lens 160 has a meniscus shape convex toward the sensor.
- the eleventh surface S11 may be an aspheric surface.
- the twelfth surface S12 may be an aspheric surface.
- the sixth lens 160 may have a D-cut shape.
- the seventh lens 170 has negative (-) refractive power.
- the thirteenth surface S13 is concave with respect to the object-side surface on the optical axis.
- the fourteenth surface S14 is concave with respect to the sensor-side surface on the optical axis.
- the seventh lens 170 has a concave shape on both sides.
- the thirteenth surface S13 may be an aspherical surface.
- the fourteenth surface S14 may be an aspherical surface.
- the seventh lens 170 may have a D-cut shape.
- the effective diameter of the seventh lens 170 may be smaller than that of other lenses.
- the eighth lens 180 has negative (-) refractive power.
- the fifteenth surface S15 is convex with respect to the object-side surface on the optical axis.
- the sixteenth surface S16 is concave with respect to the sensor-side surface in the optical axis.
- the eighth lens 180 has a meniscus shape convex toward the mule body.
- the fifteenth surface S15 may be an aspherical surface.
- the sixteenth surface S16 may be an aspheric surface.
- the eighth lens 180 may have a D-cut shape.
- At least one of the first lens 110 to the eighth lens 180 may include glass.
- the third lens 130 and the fourth lens 140 may include glass. Accordingly, the overall length of the optical system can be reduced.
- the zoom magnification of the optical system may be 1.5 times or more.
- a minimum distance between the lenses of the first lens group to the third lens group may be 0.2 mm to 8 mm.
- the first to third lens groups have lengths and refractive powers as shown in FIG. 26 .
- the optical system 1000 when operating in the first mode to the third mode, has an effective focal length (EFL), TTL, BFL, angle of view, F number, EPD, and TD as shown in FIG. 27 .
- the TD is the length from the first surface to the sixteenth surface.
- the first lens to the eighth lens have thickness ratios as shown in FIG. 28 .
- the optical axis thickness/edge thickness of the first lens to the eighth lens of the optical system 1000 is 3 or less.
- the edge thickness/optical axis thickness of the first lens to the eighth lens is 3 or less.
- the de-cut ratio is the ratio before and after the de-cut when the minimum effective diameter of the first lens group G1, the second lens group G2, and the third lens group G3 is satisfied with the set size.
- FIG. 30 is a diagram illustrating a mobile terminal to which a camera module according to an embodiment is applied.
- the mobile terminal 1 may include a camera module 10 disposed on the rear side.
- the camera module 10 may include an image capturing function.
- the camera module 10 may have at least one function of auto focus, zoom function, and OIS function.
- the camera module 10 may process an image frame of a still image or a moving image obtained by an image sensor unit in a shooting mode or a video call mode.
- the processed image frame may be displayed on a display unit (not shown) of the mobile terminal 1 . Also, it may be stored in a memory (not shown). In addition, although not shown in the drawings, the camera module may be further disposed on the front side of the mobile terminal 1 .
- the camera module 10 may include a first camera module 10A and a second camera module 10B. At this time, at least one of the first camera module 10A and the second camera module 10B may include the optical system 1000 . Accordingly, the camera module 10 may have improved optical characteristics. In addition, an autofocus (AF) function may be provided for a subject located at infinity to a short distance of 40 mm or less. In addition, the optical system 1000 can minimize the amount of movement of the lens group. Accordingly, the camera module can operate with low power. In addition, the amount of curvature generated according to movement can be minimized. Also, the camera module may have a compact size.
- AF autofocus
- the mobile terminal 1 may further include an auto focus device 31 .
- the auto focus device 31 may include an auto focus function using a laser.
- the auto focus device 31 may be used in a condition in which an auto focus function using an image of the camera module 10 is reduced.
- the auto focus device 31 may be used at a close distance of 10 m or less or in a dark environment.
- the autofocus device 31 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device and a light receiving unit such as a photodiode that converts light energy into electrical energy.
- VCSEL vertical cavity surface emitting laser
- the mobile terminal 1 may further include a flash module 33.
- the flash module 33 may include a light emitting element therein.
- the flash module 33 may be operated by a camera operation of a mobile terminal or a user's control.
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Abstract
Description
Claims (10)
- 물체 측으로부터 센서 측 방향으로 광축을 따라 순차적으로 배치되며, 적어도 하나의 렌즈를 각각 포함하는 제 1 렌즈군, 제 2 렌즈군 및 제 3 렌즈군을 포함하고,상기 제 1 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 1 렌즈, 제 2 렌즈 및 제 3 렌즈를 포함하고,상기 제 2 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 4 렌즈 및 제 5 렌즈를 포함하고,상기 제 3 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 6 렌즈, 제 7 렌즈 및 제 8 렌즈를 포함하고,상기 제 2 렌즈군 및 상기 제 3 렌즈군은 상기 센서 측 방향으로 이동(제 1 모드) 및 상기 물체 측 방향으로 이동(제 3 모드) 가능하고,상기 제 3 렌즈는 음(-)의 굴절력을 가지고,상기 제 4 렌즈는 양(+)의 굴절력을 가지고,상기 제 5 렌즈는 음(-)의 굴절력을 가지고,상기 제 3 렌즈 및 상기 제 4 렌즈는 유리를 포함하고,상기 광학계는 하기 수학식을 만족하는 광학계.[수학식]13 < EFL < 29(수학식에서 EFL은 상기 광학계의 유효초점거리(㎜)를 의미한다.)
- 제 1항에 있어서,상기 제 1 렌즈 및 상기 제 8 렌즈는 디-컷(D-cut) 형상을 가지는 광학계.
- 제 1항에 있어서,상기 제 1 렌즈의 물체 측 면은 상기 물체 측 면으로 볼록하고,상기 제 3 렌즈의 센서 측 면은 상기 센서 측 면으로 오목하고,상기 제 4 렌즈의 물체 측 면은 상기 물체 측 면으로 볼록한 광학계.
- 제 1항에 있어서,상기 광학계는 하기의 수학식을 만족하는 광학계.[수학식]0 < CT_Lx / ET_Ly < 30 < ET_Lx / CT_Ly < 3(수학식에서 CT_Lx은 제 x 렌즈의 광축에서의 두께를 의미하고, ET_Ly은 제 y 렌즈의 유효 영역 끝단에서의 두께를 의미하고, x는 1≤ x ≤ 8의 자연수이고, y는 1≤ y ≤ 8의 자연수이고, x=y를 만족한다.)
- 제 1항에 있어서,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]0 < CH_G1 - CH_G2 < 10 < CH_G1 - CH_G3 < 1(수학식에서 CH_G1은 상기 제 1 렌즈군의 렌즈들의 유효경의 최소 크기(CH; clear height)를 의미하고, CH_G2는 상기 제 2 렌즈군의 렌즈들의 유효경의 최소 크기(CH; clear height)를 의미하고, CH_G3은 상기 제 3 렌즈군의 렌즈들의 유효경의 최소 크기(CH; clear height)를 의미한다.)
- 물체 측으로부터 센서 측 방향으로 광축을 따라 순차적으로 배치되며, 적어도 하나의 렌즈를 각각 포함하는 제 1 렌즈군, 제 2 렌즈군 및 제 3 렌즈군을 포함하고,상기 제 1 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 1 렌즈, 제 2 렌즈 및 제 3 렌즈를 포함하고,상기 제 2 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 4 렌즈 및 제 5 렌즈를 포함하고,상기 제 3 렌즈군은 상기 물체 측으로부터 상기 센서 측 방향으로 상기 광축을 따라 순차적으로 배치되는 제 6 렌즈, 제 7 렌즈 및 제 8 렌즈를 포함하고,상기 제 2 렌즈군 및 상기 제 3 렌즈군은 상기 센서 측 방향으로 이동(제 1 모드) 및 상기 물체 측 방향으로 이동(제 3 모드) 가능하고,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]1 < TD_G1/TD_G2 < 2(상기 TD_G1은 상기 제 1 렌즈군의 길이이다. 상기 TD_G2은 상기 제 2 렌즈군의 길이이다.)
- 제 6항에 있어서,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]0.8 < TD_G3/TD_G2 < 1.5(상기 TD_G2는 상기 제 2 렌즈군의 길이이다. 상기 TD_G3은 상기 제 3 렌즈군의 길이이다.)
- 제 6항에 있어서,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]40 < Ave_ABV < 50(상기 Ave_ABV는 상기 제 1 렌즈 내지 상기 제 8 렌즈의 아베수의 평균이다.)
- 제 6항에 있어서,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]1.5 < Ave_Ind < 1.8(상기 Ave_Ind는 상기 제 1 렌즈 내지 상기 제 8 렌즈의 굴절률의 평균이다.)
- 제 6항에 있어서,상기 제 1 렌즈군, 상기 제 2 렌즈군 및 상기 제 3 렌즈군은 하기의 수학식을 만족하는 광학계.[수학식]0.7 < FOV(θ)_1/Max_CRA_1 < 2,0.7 < FOV(θ)_2/Max_CRA_2 < 2,0.7 < FOV(θ)_3/Max_CRA_3 < 2,(상기 FOV(θ)_1은 상기 제 1 모드에서 상기 광학계의 유효 화각이다. 상기 FOV(θ)_2는 상기 제 2 모드에서 상기 광학계의 유효 화각이다. 상기 FOV(θ)_3는 상기 제 3 모드에서 상기 광학계의 유효 화각이다. 상기 Max_CRA_1은 상기 제 1 모드에서 상기 광학계의 주광선이다. 상기 Max_CRA_2은 상기 제 2 모드에서 상기 광학계의 주광선이다. 상기 Max_CRA_3은 상기 제 3 모드에서 상기 광학계의 주광선이다.)
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| JP2024537532A JP2025500378A (ja) | 2021-12-20 | 2022-12-20 | 光学系、これを含む光学モジュール、及びカメラモジュール |
| US18/721,956 US20250044561A1 (en) | 2021-12-20 | 2022-12-20 | Optical system, and optical module and camera module comprising same |
| CN202280092152.1A CN118805110A (zh) | 2021-12-20 | 2022-12-20 | 光学系统、包括该光学系统的光学模块和相机模块 |
| EP22911837.7A EP4455755A4 (en) | 2021-12-20 | 2022-12-20 | OPTICAL SYSTEM AND OPTICAL MODULE AND CAMERA MODULE THEREFORE |
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| KR20210183217 | 2021-12-20 | ||
| KR10-2021-0183217 | 2021-12-20 | ||
| KR1020220173155A KR20230094152A (ko) | 2021-12-20 | 2022-12-12 | 광학계, 이를 포함하는 광학 모듈 및 카메라 모듈 |
| KR10-2022-0173155 | 2022-12-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005078038A (ja) * | 2003-09-04 | 2005-03-24 | Matsushita Electric Ind Co Ltd | ズームレンズ |
| KR20150070876A (ko) * | 2013-12-17 | 2015-06-25 | 삼성전자주식회사 | 소형 이너포커스 렌즈 시스템 및 이를 구비한 촬상장치 |
| JP2018025579A (ja) * | 2016-08-08 | 2018-02-15 | キヤノン株式会社 | ズームレンズ及びそれを有する光学機器 |
| JP2019139173A (ja) * | 2018-02-15 | 2019-08-22 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| KR20210060316A (ko) * | 2019-11-18 | 2021-05-26 | 엘지이노텍 주식회사 | 광학계 및 이를 포함하는 카메라 모듈 |
Family Cites Families (2)
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| JPH0812326B2 (ja) * | 1986-09-01 | 1996-02-07 | ミノルタ株式会社 | 逆望遠型広角レンズ |
| KR100800811B1 (ko) * | 2006-06-23 | 2008-02-01 | 삼성전자주식회사 | 줌 렌즈 시스템 |
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- 2022-12-20 EP EP22911837.7A patent/EP4455755A4/en active Pending
- 2022-12-20 TW TW111149037A patent/TW202340784A/zh unknown
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005078038A (ja) * | 2003-09-04 | 2005-03-24 | Matsushita Electric Ind Co Ltd | ズームレンズ |
| KR20150070876A (ko) * | 2013-12-17 | 2015-06-25 | 삼성전자주식회사 | 소형 이너포커스 렌즈 시스템 및 이를 구비한 촬상장치 |
| JP2018025579A (ja) * | 2016-08-08 | 2018-02-15 | キヤノン株式会社 | ズームレンズ及びそれを有する光学機器 |
| JP2019139173A (ja) * | 2018-02-15 | 2019-08-22 | キヤノン株式会社 | ズームレンズ及びそれを有する撮像装置 |
| KR20210060316A (ko) * | 2019-11-18 | 2021-05-26 | 엘지이노텍 주식회사 | 광학계 및 이를 포함하는 카메라 모듈 |
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| See also references of EP4455755A4 * |
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| CN117706745A (zh) * | 2023-12-18 | 2024-03-15 | 舜宇光学(中山)有限公司 | 观瞄镜头 |
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| TW202340784A (zh) | 2023-10-16 |
| EP4455755A1 (en) | 2024-10-30 |
| US20250044561A1 (en) | 2025-02-06 |
| JP2025500378A (ja) | 2025-01-09 |
| EP4455755A4 (en) | 2025-04-09 |
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