WO2014169784A1 - 发光装置及投影系统 - Google Patents

发光装置及投影系统 Download PDF

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Publication number
WO2014169784A1
WO2014169784A1 PCT/CN2014/075190 CN2014075190W WO2014169784A1 WO 2014169784 A1 WO2014169784 A1 WO 2014169784A1 CN 2014075190 W CN2014075190 W CN 2014075190W WO 2014169784 A1 WO2014169784 A1 WO 2014169784A1
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WO
WIPO (PCT)
Prior art keywords
light
concentrating
area
reflective
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/075190
Other languages
English (en)
French (fr)
Inventor
胡飞
侯海雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Appotronics Corp Ltd
Original Assignee
Appotronics Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201310138442.8A external-priority patent/CN104049445B/zh
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Priority to EP14784912.9A priority Critical patent/EP2988170B1/en
Priority to KR1020157032302A priority patent/KR101825537B1/ko
Priority to JP2016507990A priority patent/JP6144410B2/ja
Priority to US14/785,847 priority patent/US10197900B2/en
Publication of WO2014169784A1 publication Critical patent/WO2014169784A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators

Definitions

  • the present invention relates to the field of illumination and display technologies, and in particular, to a light-emitting device and a projection system.
  • the brightness requirements of the light sources are getting higher and higher, especially in special applications such as theater projections, and the brightness requirements of the light sources tend to reach more than 10,000 lumens.
  • the light-emitting device includes a laser array light source 110, a collimating lens array 120, a collecting lens 130, a homogenizing rod 140, and a lens 150. , fluorescent pink wheel 160.
  • Figure 2 is a right side view of the structure of the laser array light source shown in Figure 1, as shown in Figure 2 As shown, the laser array light source is formed by a plurality of laser diodes having a higher power and emitting a high-intensity laser.
  • Collimating lens array 120 A plurality of collimating lens units are included, each collimating lens unit corresponding to each laser diode and collimating the outgoing light of the laser diode.
  • the collecting lens 130 is aligned with the straight lens array 120.
  • the exiting light is focused, and the focused light is homogenized by the homogenizing rod 140, and then focused by the lens 150 to the fluorescent pink wheel 160 to generate the desired laser light.
  • the focal length of the condensing lens 130 is long, the length of the entire illuminating device is very long and large.
  • the technical problem to be solved by the present invention is to provide a light-emitting device and a projection system that emit a high-intensity uniform spot with a small volume.
  • the embodiment of the invention provides a light-emitting device, which comprises:
  • a laser array light source comprising a non-light emitting region and a light emitting region composed of a plurality of laser elements
  • a reflective concentrating system comprising: a concentrating area and a non-concentrating area, wherein the concentrating area is used for focusing and reflecting the outgoing light of the laser array source;
  • a light collecting system for collecting and emitting the reflected light of the reflective concentrating system
  • the light collecting system, the non-light emitting region, and the non-light collecting region are located on the same line parallel to the optical axis of the laser array light source, and the light collecting system passes through the non-light emitting region and/or the non-light collecting region.
  • the reflective concentrating system is a reflector
  • the middle area of the reflector is a non-light collecting area
  • the area outside the intermediate area is a concentrating area
  • the light collecting system passes through the non-light emitting area.
  • the reflective concentrating system comprises a reflector and a reflective element
  • the reflector comprises a hollow area
  • the hollow area is a non-light-concentrating area
  • the area outside the hollow area and the reflective element are concentrating areas
  • the light collecting system is hollowed out through the reflector region.
  • the reflective element is attached to a non-emitting area of the laser array source.
  • the reflective concentrating system comprises a reflective element and a collecting lens having a hollowed out area
  • the hollowed out area of the collecting lens is a non-concentrating area
  • the non-hollowed area of the collecting lens and the reflecting element are a collecting area
  • the collecting lens The non-hollowed area is used to focus the outgoing light of the laser array light source
  • the reflective element is used to reflect the outgoing light of the collecting lens
  • the light collecting system passes through the hollowed out area of the collecting lens and the non-light emitting area of the laser light source array.
  • the reflective element comprises a convex reflective surface or a concave reflective surface for reflecting the exiting light of the reflective concentrating system and focusing the outgoing light.
  • the light emitting device further includes a supplemental light source on the same straight line as the non-light emitting region and the non-light collecting region, and is not located on the optical path of the light emitted by the laser array source, and the emitted light of the supplemental light source is incident on the light source.
  • Light collection system a supplemental light source on the same straight line as the non-light emitting region and the non-light collecting region, and is not located on the optical path of the light emitted by the laser array source, and the emitted light of the supplemental light source is incident on the light source.
  • the light collecting system comprises a homogenizing rod.
  • the light exiting surface of the light homogenizing rod is located between the laser array light source and the reflective concentrating system.
  • the light collecting system further comprises a lens or a transparent glass piece, the lens or the transparent glass piece being fixed in the non-light emitting area or the non-light collecting area, so that the light emitted from the light collecting rod passes through the non-light emitting area or the non-light collecting area from the lens. Or transparent glass sheet is transmitted.
  • the light collecting system further comprises a collimating lens whose focus coincides with the focus of the reflective concentrating system for collimating the exiting light of the reflective concentrating system to the homogenizing rod.
  • the light emitting device further comprises a collimating lens array
  • the collimating lens unit of the collimating lens array is in one-to-one correspondence with the laser elements in the laser array light source, and the laser elements in the laser array light source are located in the collimating lens unit corresponding thereto
  • the optical axis is offset from the predetermined position of the focus of the lens unit such that the exiting light of the collimating lens unit has a predetermined divergence angle.
  • the present invention also provides a projection system including the above-described light emitting device.
  • the embodiment of the invention has the following beneficial effects:
  • the exiting light of the illuminating region of the laser array source is reflected by the reflective concentrating system and focused to the light collecting system. Since the light path is reflected, and The light collecting system, the non-light emitting area, and the non-light collecting area are located on the same line parallel to the optical axis of the laser array light source, so that the light must pass through the non-light emitting area or/or out of the light emitting device. And non-concentrated areas are emitted.
  • Both the laser array source and the reflective concentrating system have a certain volume, but because the reflective concentrating system passes through the non-illuminated area of the laser array source and / Or the non-concentrating area of the concentrating system is reflected, so the laser array source and/or the reflection concentrating system does not occupy an extra length, thereby reducing the volume of the illuminating device.
  • Figure 1 is a lighting device in the prior art
  • Figure 2 is a right side view showing the structure of the laser array light source shown in Figure 1;
  • Figure 3a is a front elevational view showing the structure of an embodiment of the light-emitting device of the present invention.
  • Figure 3b is a schematic view showing the structure of the light-emitting device shown in Figure 3a after adding a supplementary light source;
  • Figure 4 is a right side view showing the structure of the laser array light source shown in Figure 3a;
  • Figure 5a is a front view showing the structure of still another embodiment of the light-emitting device of the present invention.
  • Figure 5b is a schematic structural view of the light-emitting device shown in Figure 5a after adding a supplementary light source;
  • Figure 6 is a right side view showing the structure of the laser array light source shown in Figure 5a;
  • Figure 7a is a front view showing the structure of still another embodiment of the light-emitting device of the present invention.
  • Figure 7b is a schematic structural view of the light-emitting device shown in Figure 7a after adding a supplementary light source;
  • Fig. 8 is a right side view showing the structure of the focus lens 431 in the embodiment shown in Fig. 7a.
  • the light-emitting device includes a laser array light source. 210, collimating lens array 220, reflective concentrating system 230, light collecting system 240.
  • Laser array light source 210 Includes multiple laser components.
  • the laser element is specifically a laser diode.
  • the emitted light of the laser diode has a high energy density and a small divergence angle, which is approximately collimated light, and can provide high-brightness outgoing light, and is a preferred light source for a high-intensity light-emitting device.
  • Figure 4 is a right side view of the structure of the laser array light source shown in FIG. 3a.
  • the laser array light source 210 includes a central circular hollow area, and the hollow area is a non-light emitting area. The area outside the hollow area is the light-emitting area 211, and the laser element is disposed in the light-emitting area 211.
  • the collimating lens array 220 also includes a hollowed out region that is non-luminescent region of the laser array source. Located on the same line parallel to the optical axis. The non-hollow region of the collimating lens array 220 covers the light emitting region 211 of the laser array light source to the laser array light source 210 The outgoing light is collimated.
  • the collimating lens array 220 may not be provided when the divergence angle of the laser is small enough to be neglected or the divergence angle size requirement of the laser is not particularly high.
  • the illumination device is provided with a reflective concentrating system 230 .
  • the reflective concentrating system 230 is specifically a reflector, and the intermediate portion of the reflector covers the laser array light source 210 in the optical axis direction.
  • the non-light-emitting area does not receive the incident light, and is a non-light-concentrating area.
  • the area other than the intermediate area is a condensed area, and the condensed area covers the laser array light source 210 in the optical axis direction.
  • the reflector 331 may be an aluminum reflector or a concave mirror plated with a reflective film.
  • the illuminating device In order to collect the exiting light of the reflective concentrating system 230, the illuminating device also includes a light collecting system 240.
  • Light collection system The 240 includes a homogenizing rod 241 that collects the outgoing light of the reflective collecting system 230 and can homogenize the emitted light.
  • the homogenizing rod 241 passes through the non-light emitting area of the laser array light source 212, and the light-emitting surface of the light-shading rod 241 is beyond the laser array light source 210, and is the light-emitting port of the light-emitting device.
  • the light stick 241 there is also a decoherence effect on the laser because, although the exiting light of the laser diode has a fixed polarization state, a plurality of laser beams of different polarization states can eliminate a portion of the polarization state during the light mixing process.
  • the structure of the homogenizing rod here may be a solid rod or a hollow rod, and its shape may be a square rod or a tapered rod.
  • the aspect ratio of the homogenizing rod can also be designed as needed, preferably, the aspect ratio is 16 : 9 or 4 : 3 to accommodate the requirements of different light modulation units in the projection system.
  • the light collection system 240 It is also possible to use a pair of fly-eye lenses instead of a homogenizing rod, as well as a light collecting effect and a homogenizing effect.
  • the light collecting system 240, the non-light emitting region 212 of the laser array light source 210, and the reflective concentrating system The non-concentrating regions of 230 are located on the same line parallel to the optical axis of the laser array source 210, and the exiting light of the reflective collecting system 230 is collected by the homogenizing rod 240 and directed toward the laser array source 210.
  • the non-illuminated area propagates in the direction.
  • the homogenizing rod 241 passes through the non-light emitting region 212 of the laser array light source 210, the laser array light source 210 and the collimating lens array 220 It does not take up extra length, which reduces the size of the illuminating device.
  • the light-emitting device in the present embodiment achieves uniform light that emits high power and is small in volume.
  • the illuminating device can be used in an ultra-high brightness laser projection system.
  • the laser array light source in this embodiment is respectively set as a red laser light source, a green laser light source, and a blue laser light source, and can be used as a light source of the projection system.
  • non-light-emitting region 212 of the laser array light source and the collimating lens array 220 The hollowed out areas are not necessarily circular, and the shape can be designed according to actual needs, as long as the homogenizing rod 241 is allowed to pass.
  • the non-light emitting region 212 of the laser array light source and the collimating lens array 220 The hollowed out area and the non-concentrating area of the reflective concentrating system 230 do not have to be located in respective central areas, and the reflective concentrating system can be designed 230 The focus position after the reflection of the incident light and the focus is changed, so that the focused focus is not located in the central region, and at this time, only the non-light-emitting region 212 of the laser array light source and the collimating lens array 220
  • the hollowed out area and the non-concentrated area of the reflective concentrating system 230 may be located on the same line parallel to the optical axis of the outgoing light of the laser array source 210.
  • the laser array light source 210 The outgoing light consists of a plurality of small beams, each of which corresponds to a laser element.
  • Reflective concentrating system 230 After the focus, only the small beams are focused to a point, and the divergence angle inside each small beam is still small, which is equivalent to reducing the light distribution of the exit surface of the laser array source 210.
  • the uniform rod 241 It does not play a good role in homogenization.
  • the light collecting system 240 is thus provided with a scattering element 242, which is specifically a diffusing sheet.
  • Scattering sheet 242 is located in the homogenizing rod 241 Between the reflective concentrating system 230 and the focus of the reflective concentrating system 230, the incident light can be scattered to expand the divergence angle inside each small beam, and the homogenizing rod 241 is improved.
  • the homogenizing effect also has the effect of decohering the laser.
  • the light output device has a large output power
  • the light-emitting device can also be provided with a driving device (not shown), which can drive the diffusion sheet 242 to move, for example, to rotate, so that the laser spot falling on the diffusion sheet 242 is on the diffusion sheet.
  • the 242 moves along a predetermined trajectory, and heat is distributed by a plurality of regions of the diffusion sheet 242, thereby preventing the diffusion sheet 242 from being burned out.
  • a stationary diffuser 242 The effect of eliminating the coherence of the laser is not very satisfactory. This is because the ideal scattering material does not exist. The scattering material cannot scatter the incident light 100%, and also guarantees a certain light transmittance, resulting in projection by the light-emitting device.
  • the area will still have interference highlights.
  • the diffuser 242 Motion occurs, so the laser light is incident on the diffusion sheet 242
  • the position of the spot changes with time, so the position of the bright spot of the area projected by the illuminating device is constantly changing.
  • the human eye cannot detect the presence of the bright spot, thereby having better decoherence. effect.
  • the diffusion sheet 242 It is also possible to replace with a fly-eye lens, each of which can diffuse the incident light to some extent.
  • a driving device may be provided to drive the fly-eye lens to rotate to improve heat dissipation.
  • both the diffusion sheet and the fly-eye lens are preferably made of glass.
  • the transmittance of the diffusion sheet is not high, and in order to increase the transmittance, the diffusion sheet 242 may be replaced with a concave lens, and the concave lens is located in the reflection concentrating system.
  • 230 is in focus with the focus of the reflective concentrating system 230, and the focus of the concave lens coincides with the focus of the reflective concentrating system 230.
  • the laser passes through the collimating lens array 220
  • the collimation, the small beam corresponding to each laser diode still has a small divergence angle.
  • Reflective concentrating system 230 The exiting light is collimated by the concave lens, and the collimation here is that the different small beams are collimated, and the divergence angle in the small beam becomes larger.
  • the area is much smaller, and the divergence angle is correspondingly increased according to the optical expansion amount.
  • the divergence angle of the small beam will be ten times that of the original, so the concave lens can divergence the small beam inside the incident laser.
  • the convex lens when the scattering sheet 242 Replaced by a convex lens, and the convex lens is located between the focus bar 241 and the focus of the reflective concentrating system 230, and the focus and reflection concentrating system 230 of the convex lens The focus is coincident, and the convex lens can also collimate the incident laser light and cause the small beam inside the laser to diverge.
  • the laser element of the laser array light source 210 may be arranged to align with the straight lens array 220.
  • the lens is out of focus, ie the laser array source 210
  • the laser elements are located on the optical axis of the collimating lens unit in its corresponding collimating lens array and offset from the predetermined position of the focus of the collimating lens unit such that each of the small beams has a predetermined divergence angle.
  • the homogenizing rod is improved without affecting the entire beam area of the outgoing light.
  • the above predetermined divergence angle is suitable within 4 degrees, which does not cause a large degree of divergence of the overall beam, and improves the uniformity effect of the homogenizing rod 241.
  • the concave lens and the convex lens are easier to be made into a glass material with respect to the diffusion sheet and the fly-eye lens, and the cost is much lower and the heat resistance is better, which is a preferable solution.
  • FIG. 3b is a schematic diagram of the structure after adding a supplementary light source to the light-emitting device shown in FIG. 3a.
  • the light-emitting device adds a supplemental light source 250, which is combined with the laser array light source 210.
  • the non-light-emitting areas, the non-concentrating areas of the reflective concentrating system 230 are on the same straight line, and are distributed on opposite sides of the reflective concentrating system 230 opposite to the laser array source 110, not in the laser array source 210.
  • the light path of the exiting light, therefore supplementing the light source 250 does not obscure the exiting light of the laser array source 110.
  • the reflector 230 In order to cause the outgoing light of the supplemental light source 250 to be incident on the light collecting system 240, the reflector 230 here The non-concentrating area is a hollow area. Thus, the outgoing light of the supplemental light source 250 is incident on the diffusing sheet 242 of the light collecting system 240 through the non-light collecting region of the reflecting cover 230.
  • the reflector 230 The non-concentrating area may not be hollowed out, and the supplemental light source 250 may be fixed on the non-concentrating area as long as the laser array source 110 is not blocked. The light that exits can be.
  • the non-light-emitting area is a plane to facilitate fixing the supplementary light source.
  • the supplementary light source 250 here is a laser light source, and of course other light sources such as an LED light source can also be used as a supplementary light source.
  • the supplemental light source 250 and the laser array light source 210 may be light of the same wavelength to increase the brightness of the light emitted by the light emitting device; the two may also be light of different wavelengths, for example, the complementary light source 250 is emitted. 462 nm blue light and the laser array source 210 exits 445 nm blue light, or the supplemental source 250 emits red light and the laser array source 210 emits blue light.
  • Figure 5a is a front view showing the structure of still another embodiment of the light-emitting device of the present invention.
  • the light-emitting device comprises a laser array light source. 310, collimating lens array 320, reflective concentrating system 330, light collecting system 340.
  • the light collecting system 340 includes a concave lens 342 and a homogenizing rod 341.
  • Figure 6 is Figure 5a The right side view of the structure of the laser array light source shown in Fig. 6, the laser array light source 310 includes a light emitting area 311 and a non-light emitting area 312.
  • the difference between the light-emitting device of this embodiment and the light-emitting device shown in FIG. 3 is that:
  • the reflective concentrating system 330 includes a reflective cover 331 and a reflective element 332, and the reflective cover 331
  • the hollow area 331b is included as a non-light-concentrating area, and the area other than the hollow area 331b is a concentrating area 331a, and the concentrating area 331a can reflect the collimating lens array.
  • the outgoing light of 320 is focused.
  • the reflective element 332 is specifically a mirror.
  • the mirror 332 is located at the reflector 331 and the reflector 331 Between the focuss of the concentrating light and perpendicular to the optical axis of the exiting light of the reflector 331, the mirror 332 can reflect the outgoing light of the reflector 331 and keep the reflected light still in focus. In this way, through the reflector With the cooperation of the mirror 331 and the mirror 332, the focusing process of the beam is divided into two optical paths, and the optical paths between the two optical paths overlap, thus causing the laser light source array 110 The distance required for focusing of the outgoing light is shortened, thereby reducing the volume of the light-emitting device.
  • the advantage of the mirror is that it is simple in structure and low in cost.
  • the reflected light of the mirror 332 is directed to the reflector 331 Exit.
  • the homogenizing rod 341 of the light collecting system 340 passes through the hollowed out region 331b of the reflecting cover (i.e., the reflective concentrating system 330). Non-concentrating area).
  • the mirror 332 Since the distance between the mirror 332 and the laser array source 310 is relatively close, as shown in FIG. 6, the mirror 332 It can be fixed on the non-light-emitting area of the laser array light source 310 to solve the problem that the mirror 332 is difficult to fix.
  • the mirror 332 in this embodiment The position of the focus point of the self-reflected light is also fixed while the position remains unchanged.
  • reflective element 332 It is also possible to replace it with a concave lens or a convex lens which comprises a reflecting surface (for example, a surface is coated with a reflecting film). Relative to the mirror, the light reflected by the convex lens can be focused at a closer distance, the light reflected by the concave lens can be focused at a greater distance, and the concave lens and the convex lens can design their own curved surface to control the focus of the reflected light. The distance of the location.
  • the position of the focused point of the reflected light can be controlled.
  • the reflected light causes a significant aberration, which cannot be designed by separately designing the reflecting cover 331
  • the surface is removed while the reflector is used 331
  • the reflecting surface of the concave lens or the convex lens can cooperate to eliminate the aberration. Therefore, a concave lens with a concave reflecting surface or a convex lens with a convex reflecting surface is a preferred solution in the case where the cost is not very sensitive.
  • a concave lens with a concave reflecting surface can also be replaced by a reflective aluminum plate with a concave reflecting surface, and the concave reflecting surface can achieve the same effect; similarly, the convex lens with a convex reflecting surface can also be used with a belt.
  • a reflective aluminum plate having a convex reflecting surface is replaced.
  • the light-emitting surface of the light-dancing rod 341 is beyond the reflection cover 331.
  • the hollowed out area facilitates the clamping and fixing of the homogenizing rod 341.
  • the homogenizing rod 341 can be made by adjusting the reflective concentrating system 330 and the light collecting system 340.
  • the illuminating surface is located just in the hollow area of the reflector 331, so that the overall structure of the illuminating device is relatively compact. At this point, you can also seal the homogenizing rod with transparent glass 341
  • the light-emitting surface can form a closed space to prevent dust from entering the interior.
  • the light concentrating rod 341 can also be made by adjusting the reflection concentrating system 330 and the light collecting system 340.
  • the light exiting surface is located between the reflector 331 and the laser array source 310.
  • the light collecting system 340 may further include a lens for the uniform light rod 341. The outgoing light is focused for use by subsequent optical components, and the lens can be fixed to the hollowed out area of the reflective cover 331 so that the overall structure of the light-emitting device can be made compact.
  • the above structure is also applicable to the light-emitting device of the embodiment shown in Figs. 3a and 3b and the subsequent embodiments.
  • Figure 3a The illustrated embodiment is an example in which the illumination device can adjust the reflective concentrating system 230 and the light collection system 240 such that the light exit surface of the homogenizing rod 241 is located at the laser array source 210.
  • the non-light emitting area and correspondingly set a glass piece on the light emitting surface of the light homogenizing rod 241, or the light emitting surface of the light collecting rod 241 is located in the laser array light source 210 and the reflective collecting system 230
  • the structure of the light-emitting device can be made compact.
  • the rear surface of the substrate is often provided with a heat sink, which may be inconvenient to implement on this side, and if the water cooling method is used, the laser array light source 210
  • the substrate does not necessarily need to be provided with a heat sink, but only one heat sink can be provided, and the structure can be easily implemented at this time.
  • the illumination device shown in Fig. 5a can also add a supplemental light source.
  • Figure 5b is Figure 5a
  • the illustrated illumination device adds a schematic diagram of the complementary light source.
  • the illumination device adds a supplemental light source 350, which is coupled to the laser array source 310.
  • the non-light-emitting areas, the non-light-concentrating areas of the reflective concentrating system 330 are on the same straight line, and in particular, the supplemental light source 350 is fixed in the non-light-emitting area of the laser array light source 310.
  • the mirror 332 cannot be fixed to the non-illuminated area of the laser array source 310, but should be located on the optical path of the supplemental source 350.
  • the mirror 332 is fixed to the collimating lens array 320 Inside the hollowed out area.
  • the mirror 332 cannot be a normal mirror mirror, but may be a wavelength selective filter, and correspondingly, the laser array source 310 and the supplemental source 350 Light of different wavelengths is emitted and reflected and transmitted by the wavelength selective filter 332, respectively, and incident on the light collecting system 330; or the mirror 332 may also be a polarizing filter, and correspondingly, the laser array light source 310 and supplemental light source 350 emit light of different polarization states, and are respectively reflected and transmitted by polarizing filter 332 and incident on light collecting system 330; or mirror 332 It may also be an angle selection filter, which is reflected and transmitted by the laser array source 310 and the incident light source 350 to be incident on the mirror 332 at different angles. In short, the laser array light source 310 and the supplemental source 350 have different optical properties of the exiting light such that the mirror 3
  • Figure 7a is a front view showing the structure of still another embodiment of the light-emitting device of the present invention.
  • the light-emitting device comprises a laser array light source. 410, collimating lens array 420, reflective concentrating system 430, light collecting system 440.
  • Light collection system 440 includes a homogenizing rod 441 and a concave lens 442.
  • the light-emitting device in this embodiment differs in that:
  • the reflection concentrating system 430 in this embodiment is a focus lens 431 and a reflection element 432.
  • Figure 8 is a diagram In the right side view of the focus lens 431 in the embodiment shown in Fig. 7, as shown in Fig. 8, the focus lens 431 is specifically a convex lens including a hollow region 431b, and a focus lens 431.
  • the hollowed out area is a non-condensed area, and the non-hollowed area 431a other than the hollowed out area 431b and the reflective element 432 are condensed areas.
  • the concentrating area can be directed to the laser array source 410 The outgoing light is focused to reduce the cross-sectional area of the laser beam.
  • the aperture of the focus lens 431 is also large enough to be directed to the laser array source 410. All of the emitted light is collected.
  • the focal length of the convex lens is related to the aperture. The larger the aperture, the longer the focal length, and therefore the focal length of the focus lens 431 is also long.
  • the reflective element 432 is specifically a convex lens including a convex reflecting surface (for example, a reflective film is plated on the surface of the convex lens).
  • Convex lens 432 is located between the focus lens 431 and the focus O of the focus lens 431, and the convex reflection surface thereof can focus the lens 431
  • the exiting light reflects and keeps the reflected light still in focus.
  • the focus lens 431 and the convex lens 432 With the cooperation, the focusing process of the beam is divided into two optical paths, and the optical paths between the two ends are overlapped. Therefore, the reflection concentrating system in this embodiment also causes the distance required for the focusing of the outgoing light of the laser light source array to be changed. It is short, thereby reducing the volume of the light-emitting device.
  • the optical axis direction of the reflected light is directed toward the focus lens 431.
  • the homogenizing rod 441 of the light collecting system 440 passes through the hollowed out area 431b of the focusing lens 431 (non-concentrating area of the reflective collecting system), and the laser array light source 410 The non-illuminated area and the hollowed out area of the collimating lens array 420.
  • the outgoing beam of the focusing lens 431 is reflected by the convex lens 432 and sequentially passes through the hollowed out region 431b of the focusing lens 431.
  • the hollowed out area of the collimating lens array 420 and the non-illuminating area of the laser array source 410 are finally emitted.
  • the light emitting device further includes a wavelength conversion device 480 .
  • a particularly high power laser directly excites the wavelength converting material, it generates higher heat, especially if the laser is Gaussian, and the intensity distribution of the spot on the surface of the wavelength converting device is uneven, which is more likely to cause the wavelength converting material.
  • the luminous efficiency is lowered.
  • from the homogenizing rod The 441 laser is more uniform, which is beneficial to improve the luminous efficiency of the wavelength conversion material.
  • the outgoing light of the homogenizing rod 441 is emitted to the lens 450 and is collimated and incident on the filter 460.
  • Filter 460 A laser that transmits laser light and reflects the wavelength conversion device 480, such as a blue laser, excites the yellow phosphor to produce a yellow laser, and the filter transmits blue light and reflects yellow light.
  • Laser transmission filter 460 after lens The 470 focuses on the wavelength conversion device 480 and excites the wavelength converting material to produce a laser. The laser is collimated by the lens 470 and then incident on the filter 460. And being reflected, so that the illuminating device emits a high-intensity laser beam.
  • the outgoing light of the wavelength conversion device may also be combined with another light source, for example, the yellow laser is mixed with the outgoing light of the other blue light source to obtain white light.
  • the illumination device of the embodiment shown in Fig. 7a can also add a supplemental light source.
  • Figure 7b is Figure 7a
  • the illustrated illuminating device adds a schematic diagram of the complementary light source.
  • the illuminating device adds a supplemental light source 410a, which is coupled to the laser array source 410.
  • the non-light-emitting regions, the non-concentrating regions of the reflective concentrating system 430 are on the same straight line, specifically, the supplemental light source 410a and the laser array light source 410 are distributed in the reflective concentrating system 430. On both sides.
  • the convex lens 432 of the reflective concentrating system 430 The surface is coated with a filter film, and the filter film may be a wavelength selective filter film.
  • the laser array light source 410 and the supplemental light source 410a respectively emit light of different wavelengths, and are respectively convex lenses 432.
  • the reflection and transmission; or the filter film on the surface of the convex lens 432 is a polarizing film.
  • the laser array light source 410 and the complementary light source 410a respectively emit light of different polarization states, and are respectively convex lenses 432.
  • the surface of the convex lens 432 is plated with an angle selective filter film, and the light emitted from the laser array source 310 and the light emitted from the supplemental light source 350 are incident on the convex lens 432.
  • the angles of the coated surfaces are different and are reflected and transmitted by them respectively.
  • the optical properties of the laser array source 410 and the supplemental source 410a are different, such that the convex lens 432 This difference can be used to reflect and transmit it separately.
  • the outgoing light of the supplemental light source 410a is transmitted through the convex lens 432 and the laser array light source 410 reflected by the convex lens 432.
  • the exiting light is incident on the light collecting system 440 together.
  • both the laser array light source 410 and the supplemental light source 410a are laser light sources, the laser array light source 410 and the complementary light source.
  • the exiting light of 410a is composed of a plurality of small beams, wherein each of the small beams is illuminated by a laser element, and the small beams are parallel to each other, and each small beam has a certain divergence angle inside.
  • the light-emitting area of the laser array light source 410 is much larger than the supplementary light source 410a
  • the illuminating area, and the divergence angle of the two outgoing lights are not much different, so the optical expansion of the outgoing light of the laser array source 410 is much larger than the optical expansion of the outgoing light of the complementary light source 410a.
  • Laser array source After the exiting light of the 410 and the complementary light source 410a is homogenized by the homogenizing rod 441, the spot size of the two light beams on the light emitting surface of the light homogenizing rod 441 is the same, but the optical array source is conserved due to the conservation of the optical expansion amount.
  • the divergence angle of the outgoing light of 410 is much larger than the divergence angle of the outgoing light of the supplemental light source 410a, and therefore the light emitted from the homogenizing rod 441 is collimated by the lens 450, and the laser array light source 410
  • the cross-sectional area of the outgoing light beam is much larger than the cross-sectional area of the outgoing light beam of the supplemental light source 410a. Therefore, the outgoing light of the laser array light source 410 and the supplemental light source 410a
  • the emitted light can be separately processed in the form of optical spread amount splitting.
  • the filter 460 in Fig. 7a is replaced with the beam splitting element 460 in Fig. 7b, and Fig. 7b A scattering device 490 is added.
  • the beam splitting element 460 includes a filter 461 and a small mirror 462 disposed in the middle of the filter 461. Small mirror here The 462 can be a specular mirror, a wavelength selective filter or a polarizer.
  • the filter 461 can transmit the outgoing light of the laser array light source 410, supplementing the light source 410a. The exiting light simultaneously reflects the wavelength conversion device 480 to generate a laser.
  • the outgoing light of the supplemental light source 410a is incident on the small mirror 462 and is reflected to the scattering device 490 Therefore, the Gaussian-distributed laser is scattered into a Lambertian laser, and the amount of optical expansion is increased, so that most of the light emitted from the scattering device 490 is transmitted from the filter 461, and a small portion is small mirror 462. Loss and reflection. Most of the light exiting from the laser array source 410 is transmitted through the filter 461 to the wavelength conversion device 480 and converted into a laser, while a small portion is reflected by the small mirror 462 to the scattering device. 490. The laser light is emitted from the wavelength conversion device 480 to the filter 461, and is reflected by the filter 461 to be combined with the outgoing light of the scattering device 490 to be emitted by the same optical path.
  • the beam splitting element 460 utilizes the outgoing light of the laser array light source 410 in the incident light and the complementary light source 410a.
  • the amount of optical spread of the emitted light is different to split the light.
  • the light-emitting device can also use a filter with holes to split the light.
  • the wavelength conversion device 480 and the scattering device 490 The position of the filter should be reversed.
  • the filter has the property of reflecting the exiting light of the laser array source 410, supplementing the outgoing light of the source 410a while transmitting the wavelength conversion device 480 to generate laser light.
  • the outgoing light of the supplemental light source 410a is incident on the aperture of the filter and transmitted to the scattering device 490 Therefore, the Gaussian-distributed laser light is scattered into a Lambertian-distributed laser, and the amount of optical expansion is increased. Therefore, most of the light emitted from the scattering device 490 is reflected by the filter, and a small portion is transmitted through the aperture of the filter and is lost.
  • Laser array light source Most of the exiting light of 410 is reflected by filter 461 to wavelength conversion device 480 and converted to a laser, while a small portion transmits the aperture of the filter to scattering device 490.
  • Laser-assisted wavelength conversion device The 480 exits the filter and transmits the filter so that the outgoing light of the scattering device 490 merges into the same optical path.
  • the homogenizing rod 441 herein may also be replaced with a fly-eye lens pair.
  • the supplementary light source 410a should be made.
  • the area of the spot light formed on the coated surface of the convex lens 432 is smaller than the area of the spot formed by the light emitted from the laser array source 410.
  • the concave lens 442 The collimated beam formed later is incident on the spot of the surface of the fly-eye lens, and the area of the spot light formed by the supplemental light source 410a is smaller than that of the laser array source 410.
  • the area of the spot formed by the emitted light is smaller than that of the laser array source 410.
  • the fly-eye lens pair does not change the area ratio of the spot formed by the outgoing light of the supplementary light source 410a and the spot formed by the light emitted from the laser array light source 410, and thus is incident on the light-splitting element
  • the area of the exiting light source 410a of the complementary light source 410a is smaller than the area of the spot light emitted by the laser array source 410, and the two can also be split by the optical spread amount splitting.
  • Embodiments of the present invention also provide a projection system including a light emitting device, which may have the structure and function in the above embodiments.
  • the projection system can employ various projection technologies, such as a liquid crystal display (LCD, Liquid Crystal Display) Projection technology, DLP (Digital Light Processor) projection technology.
  • LCD liquid crystal display
  • DLP Digital Light Processor

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Abstract

一种发光装置及投影系统，包括：激光阵列光源（210，310，410），包括非发光区域（212，312）和由多个激光元件组成的发光区域（211，311）；反射聚光系统（230，330，430），包括聚光区域（331a，431a）和非聚光区域（331b，431b）,聚光区域（331a，431a）用于对激光阵列光源（210，310，410）的出射光进行聚焦并反射；光收集系统（240，340，440），用于收集并出射来自反射聚光系统（230，330，430）的出射光。光收集系统（240，340，440）、非发光区域（212，312）以及非聚光区域（331b，431b）位于平行于激光阵列光源（210，310，410）出射光光轴的同一直线上，且光收集系统（240，340，440）经过非发光区域（212，312）和/或非聚光区域（331b，431b）。该发光装置及投影系统体积小并能出射高亮度均匀的光斑。

Description

发光装置及投影系统 技术领域
本发明涉及照明及显示技术领域，特别是涉及一种发光装置及投影系统。
背景技术
随着电视等显示设备的高清化、大型化，其对光源的亮度要求越来越高，特别是影院放映等特殊应用场合，对光源的亮度要求往往会达到一万流明以上。
为了实现光源的高亮度，现有的技术方案大多数采用将发光元件组成阵列光源，再对阵列光源的出射光进行压缩光束，以提高亮度。例如，图 1 为现有技术中的一种发光装置，如图 1 所示，发光装置包括激光阵列光源 110 、准直透镜阵列 120 、聚光透镜 130 、匀光棒 140 ，透镜 150 ，荧光粉色轮 160 。图 2 为图 1 所示激光阵列光源的结构右视图，如图 2 所示，激光阵列光源是由多个激光二极管排布而成，该激光阵列光源具有较高的功率，并出射高亮度的激光。准直透镜阵列 120 包括多个准直透镜单元，每个准直透镜单元与每个激光二极管对应，并对激光二极管的出射光进行准直。为了减小光束截面积，聚光透镜 130 对准直透镜阵列 120 的出射光进行聚焦，被聚焦后的光经过匀光棒 140 的匀光后，由透镜 150 聚焦到荧光粉色轮 160 产生所需受激光。
但是，由于聚光透镜 130 的焦距很长，导致整个发光装置的长度非常长，体积很大。
 技术问题
本发明主要解决的技术问题是提供一种小体积并出射高亮度均匀光斑的发光装置及投影系统。
本发明实施例提供了一种 发光装置，其特征在于，包括：
激光阵列光源，该激光阵列光源包括非发光区域和由多个激光元件组成的发光区域；
反射聚光系统，该反射聚光系统包括聚光区域和非聚光区域，该聚光区域用于对激光阵列光源的出射光进行聚焦并反射；
光收集系统，该光收集系统用于收集反射聚光系统的出射光并出射；
光收集系统、非发光区域以及非聚光区域位于平行于激光阵列光源出射光光轴的同一直线上，且光收集系统经过非发光区域和 / 或非聚光区域。
优选地，反射聚光系统为反射罩，该反射罩的中间区域为非聚光区域，该中间区域以外的区域为聚光区域，光收集系统经过非发光区域。
优选地，反射聚光系统包括反射罩和反射元件，反射罩包括镂空区域，该镂空区域为非聚光区域，镂空区域以外的区域和反射元件为聚光区域，光收集系统经过反射罩的镂空区域。
优选地，反射元件固定在激光阵列光源的非发光区域。
优选地，反射聚光系统包括反射元件和具有镂空区域的聚光透镜，聚光透镜的镂空区域为非聚光区域，聚光透镜的非镂空区域和反射元件为聚光区域，聚光透镜的非镂空区域用于对激光阵列光源的出射光进行聚焦，反射元件用于对聚光透镜的出射光进行反射，光收集系统经过聚光透镜的镂空区域和激光光源阵列的非发光区域。
优选地，反射元件包含凸反射面或者凹反射面，该凸反射面或者凹反射面用于反射反射聚光系统的出射光并使得该出射光聚焦。
优选地，发光装置还包括补充光源，该补充光源与非发光区域、非聚光区域位于同一条直线上，且不位于激光阵列光源出射光的光路上，该补充光源的出射光入射至所述光收集系统。
优选地，光收集系统包括匀光棒。
优选地，匀光棒的出光面位于激光阵列光源与反射聚光系统之间。
优选地，光收集系统还包括透镜或者透明玻璃片，该透镜或者透明玻璃片固定在非发光区域或者非聚光区域，以使得匀光棒的出射光经过非发光区域或者非聚光区域从透镜或者透明玻璃片透射。
优选地，光收集系统还包括准直透镜，该准直透镜的焦点与反射聚光系统的焦点重合，该准直透镜用于将反射聚光系统的出射光准直后出射至匀光棒。
优选地，发光装置还包括准直透镜阵列，该准直透镜阵列的准直透镜单元与激光阵列光源中的激光元件一一对应，激光阵列光源中的激光元件位于与其对应的准直透镜单元的光轴上偏离该透镜单元焦点的预定位置，以使得准直透镜单元的出射光有预定的发散角度。
本发明还提供了一种投影系统，该投影装置包括上述发光装置。
与现有技术相比，本发明实施例具有如下有益效果：
本发明实施例中，激光阵列光源的发光区域的出射光会被反射聚光系统反射并聚焦至光收集系统。由于光路被反射，且 光收集系统、非发光区域以及非聚光区域位于平行于激光阵列光源出射光光轴的同一直线上，因此光线要从发光装置出射必须要经过非发光区域或 / 和非聚光区域出射。无论激光阵列光源还是反射聚光系统都一定的体积，但是由于反射聚光系统经过激光阵列光源的非发光区域和 / 或反射聚光系统的非聚光区域，因此该激光阵列光源和 / 或反射聚光系统不会占用额外的长度，从而减小了发光装置的体积。
 附图说明
图 1 为现有技术中的一种发光装置 ;
图 2 为图 1 所示激光阵列光源的结构右视图；
图 3a 为本发明的发光装置的一个实施例的结构主视图；
图 3b 为图 3a 所示发光装置增加补充光源后的结构示意图；
图 4 为图 3a 所示激光阵列光源的结构右视图；
图 5a 为本发明的发光装置的又一个实施例的结构主视图；
图 5b 为图 5a 所示的发光装置增加补充光源后的结构示意图；
图 6 为图 5a 中所示的激光阵列光源的结构右视图；
图 7a 为本发明的发光装置的又一个实施例的结构主视图；
图 7b 为图 7a 所示发光装置增加补充光源后的结构示意图；
图 8 为图 7a 所示实施例中聚焦透镜 431 的结构右视图。
 本发明的实施方式
下面结合附图及实施方式来对本发明的实施例进行详细分析。
图 3a 为本发明的发光装置的一个实施例的结构主视图，如图 3a 所示，发光装置包括激光阵列光源 210 、准直透镜阵列 220 、反射聚光系统 230 、光收集系统 240 。
激光阵列光源 210 包括多个激光元件。激光元件具体为激光二极管，激光二极管的出射光具有很高的能量密度，且发散角度很小，为近似准直光，可以提供高亮度的出射光，是高亮度发光装置的优选光源。图 4 为图 3a 所示激光阵列光源的结构右视图，如图 4 所示，激光阵列光源 210 包括中心的圆形镂空区域，该镂空区域为非发光区域 212 ，镂空区域以外的区域为发光区域 211 ，激光元件设置在发光区域 211 内。
尽管激光的准直性较好，但还是有一定的发散角度，其在传播过程会扩大光束截面积而降低发光装置的亮度，因此激光阵列光源 210 的出射光会经过准直透镜阵列 220 准直后出射。与激光阵列光源 210 对应地，准直透镜阵列 220 也包括一个镂空区域，该镂空区域与激光阵列光源的非发光区域 212 位于平行于光轴的同一直线上。准直透镜阵列 220 的非镂空区域覆盖激光阵列光源的发光区域 211 ，以对激光阵列光源 210 的出射光进行准直。但是当激光的发散角小到足以忽略或者对激光的发散角大小要求不是特别高的时候可以不设置准直透镜阵列 220 。
如图 4 所示，当为了实现大功率的发光装置，几十颗甚至上百颗激光元件可能会排列在激光阵列光源 210 的发光区域 211 中，因此激光阵列光源的发光面积很大。为了压缩光束截面积以及便于后续光学元件处理，发光装置设置了反射聚光系统 230 。本实施例中，反射聚光系统 230 具体为反射罩，该反射罩的中间区域在光轴方向上覆盖激光阵列光源 210 的非发光区域，不会接收到入射光，为非聚光区域，该中间区域以外的区域为聚光区域，该聚光区域在光轴方向上覆盖激光阵列光源 210 的发光区域，以对入射到该区域的光进行聚焦并反射。反射罩 331 可以是铝反射板，也可以用镀有反射膜的凹面镜代替。
为了对反射聚光系统 230 的出射光进行收集，发光装置还包括了光收集系统 240 。光收集系统 240 包括匀光棒 241 ，匀光棒 241 收集反射聚光系统 230 的出射光并且可以对该出射光进行匀光。匀光棒 241 经过激光阵列光源的非发光区域 212 ，且匀光棒 241 的出光面超出激光阵列光源 210 ，为发光装置的出光口。
此外，匀光棒 241 还具有对激光进行消相干作用，这是由于尽管激光二极管的出射光具有固定的偏振态，但是多个不同偏振态的激光光束在混光过程中可以消除部分的偏振态。这里的匀光棒的结构可以是实心棒或者空心棒，其形状可以是方棒或者锥形棒。匀光棒的长宽比也可以根据需要进行设计，优选地，长宽比为 16 ： 9 或者 4 ： 3 ，以适应投影系统中的不同光调制单元的要求。
另外，在本发明其它实施方式中，光收集系统 240 还可以采用复眼透镜对以替代匀光棒，也同样可以起到光收集作用和匀光作用。
为了保证光束出射，光收集系统 240 、激光阵列光源 210 的非发光区域 212 以及反射聚光系统 230 的非聚光区域位于平行于激光阵列光源 210 出射光光轴的同一直线上，且反射聚光系统 230 的出射光被匀光棒 240 收集并向激光阵列光源 210 的非发光区域方向传播。本实施例中，由于匀光棒 241 经过激光阵列光源 210 的非发光区域 212 ，因此该激光阵列光源 210 与准直透镜阵列 220 不会占用额外的长度，从而减小了发光装置的体积。
因此，本实施例中的发光装置实现了出射大功率的均匀光并且体积较小。该发光装置可以用于超高亮度的激光投影系统中，例如将本实施例中的激光阵列光源分别设置成红色激光光源、绿色激光光源、蓝色激光光源，可以作为投影系统的光源。
值得说明的是，上述激光阵列光源的非发光区域 212 、准直透镜阵列 220 的镂空区域都不一定是圆形，其形状可以根据实际需要进行设计，只要允许匀光棒 241 通过即可。另外，激光阵列光源的非发光区域 212 、准直透镜阵列 220 的镂空区域以及反射聚光系统 230 的非聚光区域并不一定要位于各自的中心区域，可以通过设计反射聚光系统 230 改变其对入射光的反射并聚焦后的焦点位置，使得聚焦后的焦点不位于中心区域，此时只要激光阵列光源的非发光区域 212 、准直透镜阵列 220 的镂空区域以及反射聚光系统 230 的非聚光区域与聚焦后的位置位于平行于激光阵列光源 210 的出射光光轴的同一直线上即可。
由于激光的出射光的准直性较好，激光阵列光源 210 的出射光由多个小光束组成，每个小光束对应着一个激光元件。经过反射聚光系统 230 的聚焦后，只是各个小光束向一点聚焦，而各个小光束内部的发散角依然很小，只是相当于将激光阵列光源 210 出射面的光分布等比例缩小了，这时，匀光棒 241 并不能起到较好的匀光作用。因此光收集系统 240 设置了散射元件 242 ，该散射元件 242 具体为散射片。散射片 242 位于匀光棒 241 与反射聚光系统 230 之间，且与反射聚光系统 230 的焦点重合，可以将入射光进行散射，以扩大每个小光束内部的发散角，提高匀光棒 241 的匀光效果，同时还具有对激光进行消相干的作用。
由于激光阵列光源 210 的出射光功率较大，发光装置还可以设置驱动装置（图中未画出），该驱动装置可以驱动散射片 242 运动，例如转动，以使得落在散射片 242 上的激光光斑在散射片 242 上沿预定轨迹运动，热量被散射片 242 的多个区域分摊，从而防止散射片 242 被烧坏。另外，静止的散射片 242 消除激光的相干性的效果不是非常理想，这是由于理想的散射材料是不存在的，散射材料不能百分之百地对入射光进行散射，且还要保证一定的光透过率，导致发光装置所投影的区域依然会有干涉亮点。当存在驱动装置时，散射片 242 发生运动，因此激光入射到散射片 242 的光斑的位置是随时间变化的，因此发光装置所投影的区域的亮点的位置是不断变化，当这个变化速度足够快的时候，人眼就不能察觉亮点的存在，从而具有更好的消相干效果。
另外，散射片 242 还可以用复眼透镜替代，复眼透镜中的每个复眼单元可以对入射光进行一定程度的扩散。类似地，也可以设置驱动装置来驱动复眼透镜转动，以提高散热能力。另外，为了进一步提高耐高温能力，无论散射片还是复眼透镜都优选地为玻璃材质。
散射片的透过率并不高，为了提高透射率，散射片 242 可以替换为凹透镜，且该凹透镜位于反射聚光系统 230 与反射聚光系统 230 的焦点之间，且该凹透镜的焦点与反射聚光系统 230 的焦点重合。激光即使经过准直透镜阵列 220 的准直，每个激光二极管对应的小光束依然有一较小的发散角。反射聚光系统 230 的出射光经凹透镜会被准直，而这里的准直是不同的小光束之间变准直了，而小光束内的发散角反而会变大。这是由于凹透镜的光斑相对于激光阵列光源 210 的出光面来说，面积小的多，根据光学扩展量守恒，发散角会相应地增大，例如经过凹透镜后整个光束被压缩到激光阵列光源 210 的出光面的十分之一，此时小光束的发散角会变为原来的十倍，因此凹透镜可以对入射的激光内部的小光束起到发散作用。值得说明的是，当散射片 242 替换为凸透镜，且该凸透镜位于匀光棒 241 与反射聚光系统 230 的焦点之间，且该凸透镜的焦点与反射聚光系统 230 的焦点重合，该凸透镜同样可以对入射的激光进行准直并使得激光内部的小光束发散。
为了进一步提高匀光效果，可以设置激光阵列光源 210 的激光元件对准直透镜阵列 220 的透镜离焦，即激光阵列光源 210 的激光元件位于与其对应的准直透镜阵列中准直透镜单元的光轴上且偏离该准直透镜单元的焦点的预定位置，使得各个小光束的具有预定的发散角度。这样，在对出射光的整个光束面积影响不大的情况下，提高了匀光棒 241 的匀光效果。在实际应用中，上述的预定发散角度在 4 度以内是比较合适的，既不会造成整体光束的较大程度发散，又提高了匀光棒 241 的匀光效果。
凹透镜和凸透镜相对于散射片和复眼透镜来说，更容易做成玻璃材料，成本要低的多，耐热性更好，是一种优选的方案。
值得说明的是，在本发明实施例的其它实施方式中，还可以在图 3a 所示的发光装置中增加补充光源。图 3b 为图 3a 所示发光装置增加补充光源后的结构示意图，如图 3b ，发光装置增加了补充光源 250 ，该补充光源 250 与激光阵列光源 210 的非发光区域、反射聚光系统 230 的非聚光区域在同一条直线，并且与激光阵列光源 110 相对分布于反射聚光系统 230 的两侧，并不在激光阵列光源 210 出射光的光路上，因此补充光源 250 并不会对激光阵列光源 110 的出射光造成遮挡。
为了使得补充光源 250 的出射光入射至光收集系统 240 ，这里的反射罩 230 的非聚光区域为镂空区域。这样，补充光源 250 的出射光透过反射罩 230 的非聚光区域入射至光收集系统 240 的散射片 242 。当然，反射罩 230 的非聚光区域也可以不是镂空的，此时补充光源 250 可以固定在该非聚光区域上，只要不遮挡激光阵列光源 110 的出射光即可。此时，优选地，非发光区域为一平面，以方便固定补充光源。
这里的补充光源 250 是激光光源，当然 LED 光源等其它光源也同样可以用作补充光源 250 。另外，补充光源 250 和激光阵列光源 210 可以是波长相同的光，以提高发光装置出射光的亮度；二者也可以是不同波长的光，例如，补充光源 250 出射 462nm 蓝光而激光阵列光源 210 出射 445nm 蓝光，或者补充光源 250 出射红光而激光阵列光源 210 出射蓝光。
实施例二
图 5a 为本发明的发光装置的又一个实施例的结构主视图，如图 5a 所示，发光装置包括激光阵列光源 310 、准直透镜阵列 320 、反射聚光系统 330 ，光收集系统 340 。光收集系统 340 包括凹透镜 342 和匀光棒 341 。图 6 为图 5a 中所示的激光阵列光源的结构右视图，如图 6 所示，激光阵列光源 310 包括发光区 311 和非发光区 312 。
本实施例的发光装置与图 3 所示发光装置的不同点在于：
在图 3 所示的实施例中，由于激光阵列光源 210 的出光面很大，反射罩 230 的面积也要足够大以对激光阵列光源 210 的出射光全部进行收集，使得反射罩 230 的焦距会较长而使得发光装置的体积较大。为了进一步减小发光装置的体积，本实施例中，反射聚光系统 330 包括反射罩 331 和反射元件 332 ，反射罩 331 包括镂空区域 331b ，该镂空区域 331b 为非聚光区域，镂空区域 331b 以外的区域为聚光区域 331a ，聚光区域 331a 可以反射准直透镜阵列 320 的出射光并聚焦。
本实施例中，反射元件 332 具体为反射镜。该反射镜 332 位于反射罩 331 和该反射罩 331 的聚光焦点之间，并垂直于反射罩 331 的出射光光轴设置，反射镜 332 可以将反射罩 331 的出射光反射，并使得反射光依然保持聚焦。这样，通过反射罩 331 和反射镜 332 的配合，光束的聚焦过程被分成了两段光程，并且这两段光程之间是有重叠的，因此使得激光光源阵列 110 出射光的聚焦所需要的距离变短了，从而减小了发光装置的体积。反射镜的优点在于结构简单，成本很低。
经过反射罩 331 和反射镜 332 的两次反射，反射镜 332 的反射光向反射罩 331 出射。为了使得反射镜 332 反射的光能够出射，光收集系统 340 的匀光棒 341 经过反射罩的镂空区域 331b （即反射聚光系统 330 的非聚光区域）。
另外，由于反射镜 332 与激光阵列光源 310 的距离比较近，如图 6 所示，反射镜 332 可以固定在激光阵列光源 310 的非发光区域上，以解决反射镜 332 悬空难以固定的问题。
但是，本实施例中的反射镜 332 在位置保持不变的情况下，自身反射光的聚焦点的位置也是固定的。而在本发明的其它实施方式中，反射元件 332 还可以用凹透镜或者凸透镜代替，该凹透镜或者凸透镜包括一个反射面（例如在表面镀有反射膜）。相对于反射镜，凸透镜反射后的光可以在更近的距离聚焦，凹透镜反射后的光可以在更远的距离聚焦，并且凹透镜和凸透镜可以根据需要来设计自身曲面以控制自身反射光的聚焦点位置的远近。这样，通过选择反射镜、凹透镜或者凸透镜，可以控制反射光聚焦点的位置。
另外，由于反射罩 331 的尺寸很大，其反射光会产生明显的像差，其无法通过单独设计反射罩 331 的曲面消除，而利用反射罩 331 和凹透镜或者凸透镜的反射面可以配合消除像差。因此，在对成本不是非常敏感的情况下，带有凹反射面的凹透镜或者带有凸反射面的凸透镜是一种优选的方案。值得说明的是，带有凹反射面的凹透镜还可以用带有凹反射面的反射铝板等代替，其凹反射面也可以达到同样的效果；同样，带有凸反射面的凸透镜还可以用带有凸反射面的反射铝板等代替。
另外，值得说明的是，本实施例中匀光棒 341 的出光面超出了反射罩 331 的镂空区域，这样有利于匀光棒 341 的夹持固定。而在本发明其它实施方式中，可以通过调整反射聚光系统 330 和光收集系统 340 使得匀光棒 341 的出光面刚好位于反射罩 331 的镂空区域，这样可以使得发光装置的整体结构比较紧凑。此时还可以用透明玻璃片封住匀光棒 341 的出光面，这样就可以形成一个封闭的空间，防止灰尘进入内部。当然，还可以通过调整反射聚光系统 330 和光收集系统 340 使得匀光棒 341 的出光面位于反射罩 331 和激光阵列光源 310 之间，此时光收集系统 340 还可以包括一个透镜，该透镜用于对匀光棒 341 的出射光进行聚焦以供后续光学元件使用，并且该透镜可以固定在反射罩 331 的镂空区域，这样就可以使得发光装置的整体结构比较紧凑。
上述结构同样适用于图 3a 、图 3b 所示的实施例以及后续实施例中的发光装置。以图 3a 所示的实施例为例，发光装置可以通过调整反射聚光系统 230 和光收集系统 240 ，使得匀光棒 241 的出光面位于激光阵列光源 210 的非发光区域并相应地在匀光棒 241 的出光面设置一玻璃片，或者使得匀光棒 241 的出光面位于激光阵列光源 210 和反射聚光系统 230 之间，并在激光阵列光源 210 的非发光区域固定一透镜，都可以起到使得发光装置的结构比较紧凑的作用。但是由于激光阵列光源 210 的基板后面往往设置有散热器，在这一侧实施可能不方便，而如果采用水冷的散热方式，激光阵列光源 210 的基板不一定需要设置散热器，而可以只有设置一块散热板，此时可以比较容易实施该结构。
与图 3a 所示实施例类似，图 5a 所示的发光装置也可以增加一补充光源。图 5b 为图 5a 所示的发光装置增加补充光源后的结构示意图，如图 5b 所示，发光装置增加了补充光源 350 ，该补充光源 350 与激光阵列光源 310 的非发光区域、反射聚光系统 330 的非聚光区域在同一条直线上，具体地，补充光源 350 固定在激光阵列光源 310 的非发光区域。此时反射聚光系统 330 的反射镜 332 不能固定于激光阵列光源 310 的非发光区域，而应位于补充光源 350 出射光的光路上。优选地，反射镜 332 固定于准直透镜阵列 320 的镂空区域内。
为了实现激光阵列光源 310 和补充光源 350 的出射光经反射镜 332 后一同入射至光收集系统 330 ，图 5b 中，反射镜 332 不能为普通的镜面反射镜，而可以是波长选择滤光片，此时对应地，激光阵列光源 310 和补充光源 350 出射不同波长的光，并分别被波长选择滤光片 332 反射和透射后一同入射至光收集系统 330 ；或者反射镜 332 也可以是偏振滤光片，此时对应地，激光阵列光源 310 和补充光源 350 出射不同偏振态的光，并分别被偏振滤光片 332 反射和透射后一同入射至光收集系统 330 ；再或者反射镜 332 也可以是角度选择滤光片，由于激光阵列光源 310 出光和补充光源 350 的出射光入射于反射镜 332 的角度不同，而分别被其反射和透射。总之，激光阵列光源 310 和补充光源 350 出射光的某种光学属性不同，从而反射镜 332 可以利用这种不同而分别对其进行反射和透射。
实施例三
图 7a 为本发明的发光装置的又一个实施例的结构主视图，如图 7a 所示，发光装置包括激光阵列光源 410 、准直透镜阵列 420 、反射聚光系统 430 、光收集系统 440 。光收集系统 440 包括匀光棒 441 和凹透镜 442 。
与图 5a 所示实施例的发光装置相比，本实施例中的发光装置的不同点在于：
（ 1 ）本实施例中的反射聚光系统 430 为聚焦透镜 431 和反射元件 432 。图 8 为图 7a 所示实施例中聚焦透镜 431 的右视图，如图 8 所示，聚焦透镜 431 具体为包括镂空区域 431b 的凸透镜，聚焦透镜 431 的镂空区域为非聚光区域，镂空区域 431b 以外的非镂空区域 431a 以及反射元件 432 为聚光区域。聚光区域可以对激光阵列光源 410 的出射光进行聚焦，从而缩小激光光束截面积。
与实施例 5 中的反射罩类似，聚焦透镜 431 的口径也要足够大以对激光阵列光源 410 的出射光全部进行收集。而凸透镜的焦距与口径有关，其口径越大，焦距越长，因此聚焦透镜 431 的焦距也会很长。
本实施例中，反射元件 432 具体为包括一凸反射面的凸透镜（例如在凸透镜的表面镀反射膜）。该凸透镜 432 位于聚焦透镜 431 和该聚焦透镜 431 的焦点 O 之间，且其凸反射面可以将聚焦透镜 431 的出射光反射，并使得反射光依然保持聚焦。这样，通过聚焦透镜 431 和凸透镜 432 的配合，光束的聚焦过程被分成了两段光程，并且这两端光程之间是有重叠的，因此本实施例中的反射聚光系统同样使得激光光源阵列出射光的聚焦所需要的距离变短了，从而减小了发光装置的体积。
另外，为了使凸透镜 432 的反射光可以出射，反射光的光轴方向朝向聚焦透镜 431 的镂空区域。光收集系统 440 的匀光棒 441 经过聚焦透镜 431 的镂空区域 431b （反射聚光系统的非聚光区域）、激光阵列光源 410 的非发光区域以及准直透镜阵列 420 的镂空区域。这样，聚焦透镜 431 的出射光束被凸透镜 432 反射后会依次通过聚焦透镜 431 的镂空区域 431b 、准直透镜阵列 420 的镂空区域和激光阵列光源 410 的非发光区域，并最终出射。
（ 2 ）本实施例中，发光装置还包括波长转换装置 480 。当功率特别的高的激光直接激发波长转换材料会产生较高的热量，特别是激光为高斯分布，其在波长转换装置的表面的光斑的光强分布不均，更容易给导致波长转换材料的发光效率下降。而本实施例中从匀光棒 441 出射的激光更加均匀，有利于提高波长转换材料的发光效率。
具体地，匀光棒 441 的出射光出射至透镜 450 并被准直入射至滤光片 460 。滤光片 460 可以透射激光而反射波长转换装置 480 出射的受激光，例如蓝光激光激发黄光荧光粉以产生黄色受激光，滤光片透射蓝光而反射黄光。激光透射滤光片 460 后被透镜 470 聚焦至波长转换装置 480 而激发波长转换材料产生受激光。受激光被透镜 470 准直后入射至滤光片 460 并被反射，使得发光装置出射高亮度的受激光。
在本发明其它实施方式中，波长转换装置的出射光还可以与另一个光源进行合光，例如黄色受激光与另一蓝光光源的出射光进行混合以得到白光。
同样地，图 7a 所示的实施例中的发光装置也可以增加一补充光源。图 7b 为图 7a 所示发光装置增加补充光源后的结构示意图，如图 7b 所示，发光装置增加了补充光源 410a ，该补充光源 410a 与激光阵列光源 410 的非发光区域、反射聚光系统 430 的非聚光区域在同一条直线上，具体地，补充光源 410a 与激光阵列光源 410 分布在反射聚光系统 430 的两侧。
这里，反射聚光系统 430 的凸透镜 432 需要表面镀有滤光膜，该滤光膜可以为波长选择滤光膜，此时对应地，激光阵列光源 410 和补充光源 410a 出射不同波长的光，并分别被凸透镜 432 反射和透射；或者凸透镜 432 表面的滤光膜为偏振膜，此时对应地，激光阵列光源 410 和补充光源 410a 出射不同偏振态的光，并分别被凸透镜 432 反射和透射；再或者凸透镜 432 的表面镀有角度选择滤光膜，由于激光阵列光源 310 的出射光和补充光源 350 的出射光入射于凸透镜 432 的镀膜面的角度不同，而分别被其反射和透射。总之，激光阵列光源 410 和补充光源 410a 出射光的某种光学属性不同，从而凸透镜 432 可以利用这种不同而分别对其进行反射和透射。这样补充光源 410a 的出射光会透射凸透镜 432 ，而与被该凸透镜 432 反射的激光阵列光源 410 的出射光一同入射至光收集系统 440 。
具体地，激光阵列光源 410 与补充光源 410a 都为激光光源，激光阵列光源 410 与补充光源 410a 的出射光由多个小光束组成，其中每个小光束为一个激光元件所发光，各小光束相互平行，每个小光束内部具有一定的发散角。
由于激光阵列光源 410 的发光面积远大于补充光源 410a 的发光面积，而二者出射光的发散角度相差不大，因此激光阵列光源 410 的出射光的光学扩展量要远大于补充光源 410a 的出射光的光学扩展量。当激光阵列光源 410 与补充光源 410a 的出射光经匀光棒 441 匀光后，二者在匀光棒 441 的出光面上的光斑大小是相同的，但是由于光学扩展量守恒，激光阵列光源 410 的出射光的发散角要远大于补充光源 410a 的出射光的发散角，因此匀光棒 441 的出射光再经透镜 450 准直后，激光阵列光源 410 的出射光光束的截面积要远大于补充光源 410a 的出射光光束的截面积。因此，激光阵列光源 410 的出射光和补充光源 410a 的出射光可以用光学扩展量分光的形式分别处理。
具体地，图 7a 中的滤光片 460 替换为图 7b 中分光元件 460 ，并且图 7b 中增加了散射装置 490 。如图 7b 所示，该分光元件 460 包括滤光片 461 以及设置在滤光片 461 中间的小反射镜 462 。这里的小反射镜 462 可以镜面反射镜、波长选择滤光片或者偏振片。如图 7b ，滤光片 461 可以透射激光阵列光源 410 的出射光、补充光源 410a 的出射光同时反射波长转换装置 480 产生受激光。
补充光源 410a 的出射光会入射至小反射镜 462 并被反射至散射装置 490 ，因此高斯分布的激光会被散射成朗伯分布的激光，光学扩展量增大，所以散射装置 490 出射光大部分会从滤光片 461 透射，小部分被小反射镜 462 反射而损失。激光阵列光源 410 的出射光大部分会透射滤光片 461 入射至波长转换装置 480 并被转换成受激光，而小部分被小反射镜 462 反射至散射装置 490 。受激光从波长转换装置 480 出射至滤光片 461 ，并被滤光片 461 反射，从而与散射装置 490 的出射光合为同一光路出射。
在本实施例中，分光元件 460 利用了入射光中激光阵列光源 410 的出射光和补充光源 410a 的出射光的光学扩展量的不同来分光。实际上，发光装置还可以使用带孔的滤光片来分光。此时，波长转换装置 480 和散射装置 490 的位置应该对换，该滤光片具有反射激光阵列光源 410 的出射光、补充光源 410a 的出射光同时透射波长转换装置 480 产生受激光的性质。
补充光源 410a 的出射光会入射至滤光片的孔并透射至散射装置 490 ，因此高斯分布的激光会被散射成朗伯分布的激光，光学扩展量增大，所以散射装置 490 出射光大部分会被滤光片反射，小部分透射滤光片的孔而损失。激光阵列光源 410 的出射光大部分会被滤光片 461 反射至波长转换装置 480 并被转换成受激光，而小部分透射滤光片的孔至散射装置 490 。受激光从波长转换装置 480 出射至滤光片，并透射滤光片，从而与散射装置 490 的出射光合为同一光路出射。
另外，值得说明的是，这里的匀光棒 441 也可以替换成复眼透镜对，此时，应使得补充光源 410a 的出射光在凸透镜 432 的镀膜面形成的光斑面积要小于激光阵列光源 410 出射光所形成的光斑面积。这样，经凹透镜 442 后形成的准直光束入射在复眼透镜对表面的光斑中，补充光源 410a 的出射光形成的光斑面积要小于激光阵列光源 410 出射光所形成的光斑面积。复眼透镜对并不改变上述补充光源 410a 的出射光形成的光斑与激光阵列光源 410 出射光所形成的光斑的面积比例，因此，入射到分光元件 460 表面的补充光源 410a 的出射光光斑面积要小于激光阵列光源 410 出射光光斑面积，二者也可以用光学扩展量分光的方式分光。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
本发明实施例还提供一种投影系统，包括发光装置，该发光装置可以具有上述各实施例中的结构与功能。该投影系统可以采用各种投影技术，例如液晶显示器（ LCD ， Liquid Crystal Display ）投影技术、数码光路处理器（ DLP ， Digital Light Processor ）投影技术。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种发光装置，其特征在于，包括：
    激光阵列光源，该激光阵列光源包括非发光区域和由多个激光元件组成的发光区域；
    反射聚光系统，该反射聚光系统包括聚光区域和非聚光区域，该聚光区域用于对所述激光阵列光源的出射光进行聚焦并反射；
    光收集系统，该光收集系统用于收集所述反射聚光系统的出射光并出射；
    所述光收集系统、非发光区域以及非聚光区域位于平行于所述激光阵列光源出射光光轴的同一直线上，且所述光收集系统经过所述非发光区域和 / 或所述非聚光区域。
  2. 根据权利要求 1 所述的发光装置，其特征在于：所述反射聚光系统为反射罩，该反射罩的中间区域为非聚光区域，该中间区域以外的区域为聚光区域，所述光收集系统经过所述非发光区域。
  3. 根据权利要求 1 所述的发光装置，其特征在于：所述反射聚光系统包括反射罩和反射元件，所述反射罩包括镂空区域，该镂空区域为非聚光区域，所述镂空区域以外的区域和反射元件为聚光区域，所述光收集系统经过所述反射罩的镂空区域。
  4. 根据权利要求 3 所述的发光装置，其特征在于：所述反射元件固定在所述激光阵列光源的非发光区域。
  5. 根据权利要求 1 所述的发光装置，其特征在于：所述反射聚光系统包括反射元件和具有镂空区域的聚光透镜，所述聚光透镜的镂空区域为非聚光区域，所述聚光透镜的非镂空区域和反射元件为所述聚光区域，所述聚光透镜的非镂空区域用于对所述激光阵列光源的出射光进行聚焦，所述反射元件用于对所述聚光透镜的出射光进行反射，所述光收集系统经过所述聚光透镜的镂空区域和激光光源阵列的非发光区域。
  6. 根据权利要求 3 至 5 任一项所述的发光装置，其特征在于，所述反射元件包含凸反射面或者凹反射面，该凸反射面或者凹反射面用于反射所述反射聚光系统的出射光并使得该出射光聚焦。
  7. 根据权利要求 1 至 5 任一项所述的发光装置，其特征在于，所述发光装置还包括补充光源，该补充光源与所述非发光区域、非聚光区域位于同一条直线上，且不位于所述激光阵列光源出射光的光路上，该补充光源的出射光入射至所述光收集系统。
  8. 根据权利要求 7 所述的任一项的发光装置，其特征在于：所述光收集系统包括匀光棒。
  9. 根据权利要求 1 至 5 任一项所述的发光装置，其特征在于：所述光收集系统包括匀光棒。
  10. 根据权利要求 9 所述的发光装置，其特征在于：所述匀光棒的出光面位于所述激光阵列光源与反射聚光系统之间。
  11. 根据权利要求 10 所述的发光装置，其特征在于：所述光收集系统还包括透镜或者透明玻璃片，该透镜或者透明玻璃片固定在所述非发光区域或者非聚光区域，以使得所述匀光棒的出射光经过所述非发光区域或者非聚光区域从所述透镜或者透明玻璃片透射。
  12. 根据权利要求 9 所述的发光装置，其特征在于，所述光收集系统还包括准直透镜，该准直透镜的焦点与所述反射聚光系统的焦点重合，该准直透镜用于将所述反射聚光系统的出射光准直后出射至所述匀光棒。
  13. 根据权利要求 12 所述的发光装置，其特征在于，所述发光装置还包括准直透镜阵列，该准直透镜阵列的准直透镜单元与所述激光阵列光源中的激光元件一一对应，所述激光阵列光源中的激光元件位于与其对应的准直透镜单元的光轴上偏离该透镜单元焦点的预定位置，以使得准直透镜单元的出射光有预定的发散角度。
  14. 一种投影系统，其特征在于，包括如权利要求 1 至 13 任一项所述的发光装置。
PCT/CN2014/075190 2013-04-20 2014-04-11 发光装置及投影系统 Ceased WO2014169784A1 (zh)

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