JPH07209609A - Projector device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to realize a projector device that can be simplified and downsized, and that can enhance the brightness of a displayed image and can significantly improve the usefulness. In a projector device using an optical device formed of a plurality of lenses, including a first lens made of an organic material, a cylindrical casing that integrally holds the plurality of lenses of the optical device coaxially. A first lens held inside the body is provided with a reference surface that comes into contact with the peripheral edge of the lens in a direction parallel to the optical axis of the lens and serves as a position reference of the first lens. Is provided along with the change of the refractive index due to the temperature change of the first lens, by providing a moving means for moving the first lens in the optical axis direction of the first lens with a predetermined distance according to the temperature change as a reference. It is possible to realize a projector device which can automatically correct the change in the focus position, which can be simplified and downsized, and which can enhance the brightness of a display image and can significantly improve the usefulness.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Field of Industrial Application Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems (FIGS. 1 and 7 to 9) Action (FIGS. 1 and 7 to 9) Example (1) Projector device (FIGS. 1 to 5) (2) Configuration of projector device according to embodiment (FIGS. 1 to 9) (2-1) Configuration of projector device according to embodiment (FIG. 6) (2-2) Relay lens First Example (FIGS. 6 to 8) (2-3) Second Example of Relay Lens (FIGS. 6 to 9) (3) Other Examples (FIGS. 1 and 7 to 9) effect

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device, and is suitable for application to, for example, a device for projecting a color image.

[0003]

2. Description of the Related Art Conventionally, as a projector device of this type, there is a projector device which individually displays red, green and blue components of image data on three CRTs (cathode ray tubes).
On the front surface of this projection type three-tube projector device, three CRTs in which red, green, and blue color filters and projection lenses are sequentially arranged on the image projection surface side are arranged.

The CRT is designed so that the red, green and blue components of the image data are directly projected onto the screen separately at the time of projection, whereby the projected light of the red, green and blue components projected from each CRT on the screen is projected. One image is formed by combining them, and a color image is projected as a whole.

Further, instead of the projection type three-tube type projector device, there is a reflection type three-tube type projector device in which three CRTs are arranged inside the box. In the case of this projector device, an optical path similar to that of the projection-type three-tube projector device is reflected and bent by a mirror arranged inside the box, and projection light is irradiated from the back surface to a frosted glass-like semitransparent screen.

As a result, each CR is displayed on the screen.
The projection lights of the red, green, and blue components emitted from T are combined to form one image, and a color image is projected as a whole. In the case of this reflection type three-tube type projector device, by bending the optical path to reduce the size and integrally forming the screen itself, it is possible to realize a smaller size projector device than the projection type three-tube type projector device. The usability of can be improved.

[0007]

However, in the projection type three-tube projector device or the reflection type three-tube projector device having such a configuration, a CRT is used as a light source and an image projected from the CRT is enlarged and displayed on the screen. Therefore, there is a problem in that it is inevitable that the entire device becomes large, and it is difficult to increase the brightness of the display image.

In order to solve such a problem, three liquid crystal panel plates are used as an image source in place of the CRT, each of the liquid crystal panel plates displays red, green and blue components, and one surface of the liquid crystal panel plate is displayed. There is a so-called liquid crystal projector device which irradiates light from the side and forms an image of the transmitted light on a screen through red, green and blue color filters, respectively.

In the case of this liquid crystal projector device, the entire device can be remarkably miniaturized as compared with a projector device which uses a CRT because a liquid crystal panel is used, but the liquid crystal panel plate itself has a low light transmittance and displays a display image. In terms of achieving high brightness, it has not been practically sufficient.

By the way, as a display system, a minute mirror surface element is arranged in a plane according to a pixel, and a mirror surface deflection type optical modulator utilizing the reflection of each mirror surface element (hereinafter referred to as a mirror light valve) is used. Those have been proposed (JP-A-60-179781, JP-A-3-40693, and JP-A-3-174112).

If a projector device for magnifying and projecting a color image can be formed by using this mirror light valve as an image source, the structure of the entire device can be simplified to the same scale as the liquid crystal projector device and can be downsized.
Further, it is considered that the display image can be significantly increased in brightness by improving the utilization efficiency of the light source as compared with the liquid crystal.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a projector device which can be simply and miniaturized and which can enhance the brightness of a displayed image and remarkably improve its usefulness.

[0013]

In order to solve such a problem, in the present invention, the first lens 53 made of an organic material,
In the projector device 1 including the optical devices 50 and 70 formed of a plurality of lenses 51 to 53 including 71, a cylindrical shape that coaxially holds the plurality of lenses 51 to 53 of the optical devices 50 and 70 integrally. Of the first lens 53, 71 by contacting the case 54 of the first lens 53, 71 inside the case 54 from the direction parallel to the optical axes of the lenses 53, 71. Reference surface 54B serving as a reference
X and the first lens 53, 71 held in the housing 54, the first lens 53, 71 with reference to the reference surface 54BX by a predetermined distance according to the temperature change of the first lens 53, 71,
The moving means 53A and 72 for moving in the optical axis direction of 71 are provided.

Further, in the present invention, the moving means 53A
Is a flange 53A made of an organic material provided on the peripheral end surface of the lens 53, and the contact surface forming a predetermined angle with the optical axis of the flange 53A is brought into contact with the reference surface 54BX.

Further, in the present invention, the moving means 72
Is a thermal expansion member 72 interposed between the flange made of an organic material provided on the peripheral end surface of the lens 71 and the contact surface and the reference surface 54BX that make a predetermined angle with respect to the optical axis of the flange.
And have.

[0016]

Function: The first lenses 53 and 71 are replaced by the first lens 5
By moving the first lenses 53, 71 in the optical axis direction with reference to the reference surface by a predetermined distance according to the temperature changes of 3, 71, the refractive index of the first lenses 53, 71 due to the temperature change. It is possible to automatically correct the change in the focal position caused by the change in

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) Overall Structure of Projector Device In FIG. 1, reference numeral 1 indicates three mirror light valves 2 corresponding to respective red, green and blue image data as a whole.
1 shows a projector device using R, 2G, 2B. 2 and 3 in which parts corresponding to those in FIG.
As shown in FIG. 3, the projection light L1 emitted from the high-intensity white light source 3 is converted into parallel light through a condenser lens 4 while unnecessary UV rays are removed by a UV filter (not shown). The dichroic mirrors 6R and 6 for separation while being bent by the reflection mirror 5 of No. 1
It is incident on G and 6B.

Separation dichroic mirrors 6R, 6G,
6B is a procession light L2 consisting of white light in red,
The green and blue lights LR, LG and LB are separated. This red,
The green and blue lights LR, LG, LB are obliquely bent upward by the second reflecting mirrors 8R, 8G, 8B through the beam shaping cylindrical lenses 7R, 7G, 7B, respectively, and reflected by the mirror light valves 2R, 2G, 2B. The surface is illuminated.

The mirror light valves 2R, 2G and 2B are
According to the pixel array of video data (for example, 768 x 576 pixels), a plurality of minute mirror surface elements each having a size of, for example, 17 [μm] square are arrayed, and thereby, a half
A reflective surface having a size similar to that of an inch CCD (solid-state image sensor) is formed. The micro mirror surface element is arranged corresponding to each memory cell of the frame memory according to the array of pixels of the video data, and the tilt state of the corresponding micro mirror surface element is changed individually according to the state of each memory cell. Has been done.

Practically, each micro mirror element is tilted by + 10 ° as shown in FIG. 4A when the memory cell is in the on state, that is, effective as a pixel, with respect to the neutral state, and conversely, when the memory cell is in the off state, When it is invalid as a pixel, it is tilted by −10 ° as shown in FIG.
As a result, the reflected light reflected by the mirror surface with respect to the incident light is
It is switched so as to have an optical path difference of 20 ° between the effective reflected light necessary for forming an image and the invalid reflected light which is not effective.

In the case of the projector device 1, the image data for one frame of red, green and blue is set in the frame memories corresponding to the mirror light valves 2R, 2G and 2B, respectively, so that the effective reflected light is obtained. Red,
Green and blue image lights are formed. The red, green and blue image lights are respectively associated with relay lenses 9R, 9G and 9B.
Through dichroic mirrors for synthesis 10R, 10G,
It is guided to 10B and is combined as a color image light, and this is enlarged and projected through a projection lens 11 having a zoom lens structure onto a screen (not shown) arranged outside the projector device 1 at a distance.

In the case of this projector device 1, the high-brightness white light source 3, the condenser lens 4, the first reflecting mirror 5, the separating dichroic mirrors 6R to 6B, the cylindrical lenses 7R to 7B, and the second reflecting mirror 8R. ~
The optical axis of the optical system of the projection lights L1 and L2 reaching 8B, the relay lenses 9R to 9B reflected by the mirror light valves 2R to 2B, and the dichroic mirror for synthesis 10R.
˜10B, the optical axis of the effective reflected light reaching the projection lens 11 is displaced by a predetermined height, thereby preventing interference between the projection light and the effective reflected light and the invalid reflected light. It is designed to get you.

Further, in the projector device 1, the beam shape of the projection light is shaped by the cylindrical lenses 7R to 7B, whereby the second reflecting mirror 8 is formed.
Even if the light is reflected obliquely upward by R to 8B, the reflecting surfaces of the mirror light valves 2R to 2B can be illuminated with a uniform illuminance.

Here, in the projector device 1, the optical device shown in FIG.
The circuit portion shown in FIG. 5 in which the same reference numerals are assigned to the corresponding portions is provided. In this projector device 1, as a video signal to be displayed, a video signal S1 input as an RGB signal from a video device or a V signal from a personal computer or the like is used.
The video signal S2 sent corresponding to GA (video graphics arrey) and the video signal S3 of VGA pattern can be selected.

These video signals S1, S2, S3 are
Each of them is input to the video select circuit 21 and selected, and the resulting video signal S4 is converted into a digital video signal S5 by the analog-digital conversion circuit 22,
It is input to the gamma correction circuit 23. The test pattern signal S6 generated by the test pattern generation circuit 24 is input to the gamma correction circuit 23 as needed. As a result, the gamma correction circuit 23 performs gamma correction on the digital video signal S5 or the test pattern signal S6 according to the set gamma correction parameter S7, and sends the resulting digital video signal S8 to the reformatting circuit 25.

The re-format circuit 25 inputs the video signals S1 and RGB video signals S2 and S input as RGB signals.
The digital video signal S8 corresponding to 3 is, for example, mirror light valves 2R to 2B composed of 768 pixels × 576 lines.
The digital video signal S9 of red, green, and blue components obtained by performing re-formatting according to the arrangement of the mirror surface elements
R, S9B and S9G are sent to the corresponding frame memories 26R, 26G and 26B, respectively.

The frame memories 26R to 26B correspond to the mirror light valves 2R to 2B, respectively. The frame memories 26R to 2B are sequentially frame by frame in accordance with the control signal S10 input from the timing control circuit 27.
The contents of 6B are written in the mirror light valves 2R to 2B, whereby red, green and blue image lights are formed as effective reflected lights.

In the case of the projector device 1, the timing control circuit 27 uses the input video signals S1 to S3.
Using the system clock S12 generated by the clock generation circuit 28 in accordance with the phase control signal S11 based on the above, the frame memories 26R to 26B and the mirror light valve 2R are used.
The control signal S10 for controlling .about.2B is generated.

In the projector device 1, when a power switch (not shown) is turned on, the AC power S13 is supplied to the power supply circuit 30 and the lamp drive circuit 31. Of these, the power supply circuit 30 supplies a predetermined DC power S14 to each circuit section to start the operation of the projector device 1. Further, the lamp drive circuit 31 drives the high-intensity white light source 3 to be turned on, so that the white light source 3 emits the projection light L1.

According to the configuration of the projector device 1,
Mirror light valves 2R, 2G, and 2B corresponding to red, green, and blue are used as image sources, and the mirror light valves 2R to 2B are driven by red, green, and blue video signals, respectively, and white light is emitted. By irradiating red, green, and blue projection lights separated by color, and synthesizing the effective reflected light, and enlarging and projecting, compared with the conventional projector using a CRT. Projector device 1 with significantly smaller size, lighter weight and simple structure
Can be realized.

Further, since the mirror light valves 2R-2B are designed to reflect the projection light,
As compared with the liquid crystal projector device, the utilization efficiency of light can be remarkably improved, and thus it is possible to realize the projector device which can be reduced in size and weight and which can increase the brightness of the displayed image.

(2) Configuration of Projector Device According to Embodiment (2-1) Configuration of Projector Device According to Embodiment As shown in FIG. 6 in which parts corresponding to those in FIG. At 40, the effective reflected light reflected by the mirror light valves 2R to 2B is about twice as large as the virtual image forming point A in the space immediately before the projection lens 11 by the relay lenses 9R to 9B. Form a focused image. This relay lens 9R ~
The magnification of 9B is selected so that the size of the image formed at the virtual image forming point A is smaller than the aperture of the projection lens 11.

(2-2) First Example of Relay Lens In the projector device 40, an optical device 50 as shown in FIG. 7 is used as the relay lenses 9R to 9B. That is, in the optical device 50, the aspherical convex lens 51 and the aspherical concave lens 52 made of a glass material are used.
And an aspherical convex lens made of an acrylic material (hereinafter referred to as an acrylic aspherical convex lens) 53 are integrally held by a cylindrical lens holder 54.

In this case, the aspherical convex lens 51 is supported on one end side in the through hole 54A of the lens holder 54 by a projection 54AX provided in the through hole 54A, and has a peripheral end portion on one surface side supported by the projection 54AX. It is fixedly held coaxially with the lens holder 54 such that a peripheral end portion on the other surface side is supported by an annular fixing member 55 fixed to one end surface of the lens holder 54. Further, the aspherical concave lens 52 has a peripheral end portion on one surface side supported by a protrusion 54AY provided in the through hole 54A in the central portion of the through hole 54A of the lens holder 54, and is disposed inside the through hole 54A. It is fixedly held coaxially with the lens holder 54 so that the peripheral end portion on the other surface side is supported by the provided annular fixing member 56.

In the acrylic aspherical convex lens 53,
A flange-shaped projection 5 protruding in one direction at the peripheral edge on the one surface side
3A is provided. In this case, the acrylic aspherical convex lens 53 has a wall surface (hereinafter, referred to as a wall surface perpendicular to the axis of the lens holder 54, which forms a step portion 54B provided on the other end side, on the other end side in the through hole 54A of the lens holder 54. This surface is referred to as a reference surface) 54B supports the tip end surface of the protrusion 53A, and a fixing member 57 fixed to the other end surface of the lens holder 54 has an O-ring 58 made of an elastic material such as rubber on the other surface side. It is held coaxially with the lens holder 54 and slidably in the optical axis direction so as to support the peripheral end portion thereof.

In the case of this embodiment, assuming that the distance between the aspherical concave lens 52 and the acrylic aspherical convex lens 53 needs to be increased by 20 [μm] with a temperature rise of 10 °,
The total length of the projection 53A of the acrylic aspherical convex lens 53 and the peripheral end of the acrylic aspherical convex lens 53 is 30
It is set to about [mm].

In the above structure, the contribution of the aspherical lens is generally large in order to improve the performance of the assembled lens. Further, in consideration of cost during mass production, a lens made of an organic material typified by acrylic has been widely used from the viewpoint that an aspherical surface can be easily molded. However, the lenses made of these organic materials have a high temperature dependence of the refractive index, and therefore, when a compound lens is formed by using such a lens and applied to a projector device, an image is formed when the temperature rises. Defocus may occur due to the change in performance.

For example, the first and second lenses 61, 62 and 63 constituting the combined lens 60 shown in FIG.
When the first convex lens 61 and the concave lens 62 are each made of a glass material, and the third lens 63 is made of an organic material, the refractive index of the third lens increases as the temperature rises. By changing, FIG. 8 (B)
As described above, the focal position of the entire combined lens 60 changes. However, this shift amount is not usually large, and accordingly, the focus position is corrected to the correct position as shown in FIG. 8C by adjusting the position of the entire lens system or only the third lens 63, which is a problem. can do.

However, for example, in the rear projection type, since the lens system is housed inside the apparatus, some remote operation is required for the focus position correction work, and the lens system can be manually adjusted. Even in such a case, there is a problem that it takes a great deal of time to adjust the temperature for each change.

However, in this projector device 1, the acrylic aspherical surface is formed by forming the flange-shaped projection 53A at the peripheral end portion on one side of the acrylic aspherical convex lens 53 in the optical device 50 forming the relay lenses 9R to 9B. The protrusion 53A expands as the refractive index changes due to the temperature rise of the convex lens 53, and as a result, the acrylic aspherical convex lens 53 responds to the expansion of the protrusion 53A within the through hole 54A of the lens holder 54 with the reference surface 54BX as a reference. By moving toward the one end of the lens holder 54 by a distance,
It is possible to automatically correct the variation of the focal length due to the change of the refractive index of the acrylic aspherical convex lens 53 due to the temperature rise.

Further, in the optical device 50, when the temperature subsequently drops, the O-ring 58 made of an elastic material is arranged between the fixing member 59 and the acrylic aspherical convex lens 53, so that the acrylic aspherical convex lens is arranged. 53 is the O
Since the ring 58 is biased, the acrylic aspherical convex lens 53 can be returned to the position in the reference plane 53BX direction.

Therefore, in this projector device 1, the acrylic aspherical convex lens 53 of the optical device 50 moves in the direction for correcting the focal position by a necessary distance according to the change of the refractive index due to the temperature change. With such a simple configuration, it is possible to effectively correct the defocus.

According to the above configuration, the reference surface 53BX of the acrylic aspherical convex lens 53 is provided inside the through hole 54A of the lens holder 54, and the acrylic aspherical convex lens 5 is provided.
An annular projection 54BX that abuts the reference surface 53BX is provided at the peripheral end portion of 3, and the acrylic aspherical convex lens 53 is biased by the O-ring 58 in the reference surface 53BX direction. It is possible to automatically correct the change in the focal position caused by the change in the refractive index of 53 due to the change in temperature, and thus it is possible to simplify and miniaturize the display image and to increase the brightness of the displayed image to significantly improve the usefulness. The device can be realized.

Further, it is possible to correct defocus due to temperature change without control from the outside of the apparatus, and it is not possible to access the focal length adjusting mechanism of the projection lens from the outside as in the rear projection type, for example. The present invention can be applied to various projector devices including the projector device 1.

(2-3) Second Embodiment of Relay Lens FIG. 9 in which parts corresponding to those in FIG. 7 are assigned the same reference numerals as in FIG. 9 is an optical device 70 of a second embodiment for forming relay lenses 9R to 9B.
The configuration is the same as that of the first embodiment except that an annular spacer 72 having a predetermined coefficient of thermal expansion is inserted in place of forming an annular protrusion on the peripheral end portion of the acrylic aspherical convex lens 71. Has been done.

In the above structure, in the optical device 70, the moving rate of the acrylic aspherical convex lens 71 with respect to the temperature rising rate can be adjusted by selecting the material of the spacer 72.

Therefore, for example, the acrylic aspherical convex lens 7
In the case where the material forming No. 1 has a small amount of movement of the acrylic aspherical convex lens 71 with respect to the temperature increase rate, the desired amount of movement can be obtained by forming the spacer 72 with a material having a large coefficient of thermal expansion such as polyethylene. Therefore, it is possible to more effectively correct the change in the focal length.

According to the above construction, the spacer 72 having a predetermined coefficient of thermal expansion is interposed between the reference surface 54BX in the lens holder 54 and the peripheral end portion of the acrylic aspherical convex lens 71. By selecting this material, the acrylic aspherical convex lens 71 can be moved by a desired distance according to the temperature rise of the acrylic aspherical convex lens 71, and thus, the optical device 5 of the first embodiment.
Compared with 0, it is possible to more effectively correct the shift of the focal point position, thus realizing a projector device that can be simplified and downsized, the display image can be made even brighter, and the usefulness can be significantly improved. it can.

(3) Other Examples In the above-mentioned first and second examples, the case where the optical devices 50 and 70 according to the present invention are applied to the relay lenses 9R to 9B has been described. The invention is not limited to this, but can be applied to other things.

In the above first and second embodiments, the case where the present invention is applied to the projector device 1 using the mirror light valve 2 has been described.
The present invention is not limited to this, but can be applied to various other projector devices.

Further, in the above-mentioned first and second embodiments, as means for forming the reference position for the movement of the acrylic aspherical convex lenses 53, 71, a step portion 54B is formed at the other end of the lens holder 54 to form a reference. Although the case where the surface 54BX is provided has been described, the present invention is not limited to this, and other means for forming the reference position for the movement of the acrylic aspherical convex lenses 53 and 71 is the through hole 5 of the lens holder 54.
Various means such as providing a protrusion in 4A can be applied.

Further, in the above-mentioned first and second embodiments, the acrylic aspherical convex lenses 53 and 71 are connected to the reference surface 54B.
An O-ring 5 made of an elastic material as a means for urging in the X direction
Although the case where 8 is used has been described, the present invention is not limited to this, and various elastic materials such as springs can be applied.

Further, in the above-mentioned first and second embodiments, the present invention is applied to the three lenses 51 to 53 or 51, 52,
The case of applying the optical device to the optical devices 50 and 70 composed of 71 has been described, but the present invention is not limited to this and is also suitable to be applied to a combined lens composed of two or four or more lenses. .

Furthermore, in the above-mentioned first and second embodiments, the case where the present invention is applied to the position correction of the lenses 53 and 71 made of an acrylic material has been described, but the present invention is not limited to this. It can also be applied to the position correction of a lens made of an organic material other than an acrylic material.

Furthermore, in the above-mentioned first and second embodiments, the present invention is applied to only one of the plurality of lenses 51 to 53 or 51, 52, 71 forming the optical device 50, 70. Although the present invention has been described above, the present invention is not limited to this, and in the case where there are a plurality of lenses made of an organic material among a plurality of lenses forming a lens combination, the present invention is applied to one or more lenses. You may make it apply.

Further, in the above-mentioned first and second embodiments, the case where the present invention is applied to the projector device 1 has been described, but the present invention is not limited to this and is also applied to other optical devices. can do.

Further, in the above-mentioned first and second embodiments, as a means for moving the acrylic aspherical lenses 53, 71, flange-shaped projections 53A are formed on the peripheral end portions of the acrylic aspherical lenses 53, 71, or acrylics are used. Aspherical lens 5
The case where the spacer 72 is inserted between the No. 3, 71 and the reference surface 54BX has been described, but the present invention is not limited to this, and for example, a measuring unit that measures the temperature of the acrylic aspherical lenses 53, 71, and Conveying means for conveying the acrylic aspherical lenses 53, 71 may be provided based on the output of the measuring means, and other various means for moving the acrylic aspherical lenses 53, 71 may be applied. obtain.

[0059]

As described above, according to the present invention, in an optical device formed of a plurality of lenses including a first lens made of an organic material, the plurality of lenses of the optical device are coaxially integrated. A cylindrical casing to hold, and formed inside the casing,
The first lens held in the housing is provided with a reference surface serving as a position reference of the first lens by contacting the peripheral edge of the lens from a direction parallel to the optical axis of the lens. And a moving unit for moving the first lens in the optical axis direction with respect to the reference surface by a predetermined distance according to the temperature change of the first lens. It is possible to realize a projector device which can automatically correct the change in the focus position, which can be simplified and downsized, and which can enhance the brightness of a display image and can significantly improve the usefulness.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the overall configuration of a projector device using a mirror-polarized light modulator.

FIG. 2 is a schematic plan view for explaining an optical system of the projector device of FIG.

3 is a schematic rear view for explaining an optical system of the projector device of FIG. 1. FIG.

FIG. 4 is a schematic diagram for explaining the operation of the mirror surface element of the mirror surface deflection type optical modulator.

5 is a block diagram showing a circuit configuration of the projector device of FIG. 1. FIG.

FIG. 6 is a schematic perspective view showing the configuration of the projector device of the embodiment.

FIG. 7 is a cross-sectional view showing an optical device of Example 1.

FIG. 8 is a plan view for explaining defocusing of a lens assembly using a lens made of an acrylic material.

FIG. 9 is a sectional view showing an optical device of Example 2.

[Explanation of symbols]

1 ... Projector device, 2 ... Mirror light valve,
9R-9B ... Relay lens, 50, 70 ... Optical device, 51-53, 61-63, 71 ... Lens, 53A
...... Protrusion, 54B …… Reference surface, 58 …… O ring, 59
...... Fixing member, 72 …… Spacer.

Claims (3)

[Claims] 1. A projector device using an optical device formed of a plurality of lenses, including a first lens made of an organic material, wherein a cylinder that integrally holds the plurality of lenses of the optical device coaxially. Shaped casing, and a reference surface formed inside the casing and serving as a position reference for the first lens by contacting the peripheral end of the lens in a direction parallel to the optical axis of the lens. Moving means for moving the first lens held in the housing in the optical axis direction of the first lens by a predetermined distance according to a temperature change of the first lens with the reference surface as a reference. A projector device characterized by being equipped with. 2. The moving means comprises a flange made of the organic material provided on the peripheral end surface of the lens, and an abutting surface of the flange that makes a predetermined angle with respect to the optical axis contacts the reference surface. The projector device according to claim 1, which is in contact with the projector device. 3. The moving means includes a flange provided on a peripheral end surface of the lens, the flange being made of the organic material, and a contact surface between the contact surface and the reference surface forming a predetermined angle with respect to the optical axis of the flange. The projector device according to claim 1, further comprising a thermal expansion member inserted therein.