CN113867090B - Projection apparatus and light source device thereof - Google Patents
Projection apparatus and light source device thereof Download PDFInfo
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- CN113867090B CN113867090B CN202111160048.5A CN202111160048A CN113867090B CN 113867090 B CN113867090 B CN 113867090B CN 202111160048 A CN202111160048 A CN 202111160048A CN 113867090 B CN113867090 B CN 113867090B
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- 230000003287 optical effect Effects 0.000 claims abstract description 203
- 238000003491 array Methods 0.000 claims abstract description 23
- 238000009792 diffusion process Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- -1 LCOS) devices Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- 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
Abstract
The embodiment of the disclosure discloses projection equipment and a light source device thereof, wherein the light source device comprises a laser module and an optical array group. The laser module comprises a module carrier and a plurality of laser transmitters, wherein the laser transmitters are arranged on the module carrier in an array manner; the optical array group comprises a plurality of optical arrays and a plurality of light-transmitting layers, wherein the optical arrays and the light-transmitting layers are sequentially arranged on one side of the laser module along the direction of an optical axis, the optical arrays comprise a plurality of optical units which are arranged along a plane array perpendicular to the optical axis, and the optical units are correspondingly arranged with the laser transmitters; the laser emitted by each laser emitter passes through the light-transmitting layer and a plurality of optical units corresponding to each laser emitter. According to the optical system, the plurality of optical arrays are arranged, each optical array comprises the plurality of optical units which are arranged along the plane array of the vertical optical axis, the optical units are correspondingly arranged with the laser emitters in the laser arrays, and the use of large-size lens elements is reduced, so that the problem of space waste caused by overlarge lens element sizes in the prior art is solved.
Description
Technical Field
The disclosure relates to the field of display, and in particular relates to a projection device and a light source device thereof.
Background
The existing laser projection design ideas are the design ideas of the traditional bulb machine and the LED light source projection. So the current laser projection scheme mainly uses the traditional lens to control the spot size and transmission angle of multiple laser beams. Under this projection scheme, in order to guarantee the processing effect to laser, lens size often differs more than 1 order of magnitude with the laser facula size, leads to projection equipment whole volume too big, has caused serious space waste.
Disclosure of Invention
The embodiment of the disclosure provides a projection device and a light source device thereof, which can solve the technical problem that the whole volume of the projection device is overlarge due to overlarge lens size in the prior art, thereby causing serious space waste.
The embodiment of the disclosure provides a light source device, which comprises a laser module and an optical array group. The laser module comprises a plurality of laser transmitters arranged in an array; the optical array group comprises a plurality of optical arrays which are sequentially arranged on one side of the laser module along the direction of an optical axis, each optical array comprises a plurality of optical units which are arranged in an array manner along the direction vertical to the optical axis, and each optical unit is correspondingly arranged with the laser emitter; the laser emitted by each laser emitter passes through a plurality of optical units corresponding to each other.
Optionally, the plurality of optical array groups include:
the first optical array comprises a plurality of collimating lens units, and each collimating lens unit is arranged corresponding to the laser emitter;
the light source device further includes at least one light-transmitting layer including:
the first variable refractive index light-transmitting layer is arranged on one light-emitting side of the first optical array along the optical axis direction.
Optionally, the at least one light-transmitting layer further comprises:
the diffusion light-transmitting layer is arranged on the light-emitting side of the first variable refractive index light-transmitting layer along the direction of the optical axis.
Optionally, the plurality of optical arrays further comprises:
the second optical array is arranged on one light emitting side of the diffusion light-transmitting layer along the direction of the optical axis and comprises a plurality of light homogenizing units, and each light homogenizing unit is arranged corresponding to the laser emitter.
Optionally, the light source device further includes:
the light receiving element is arranged on the light emitting side of the optical array group along the optical axis direction.
Optionally, the at least one light-transmitting layer further includes a second variable refractive index light-transmitting layer, the plurality of optical arrays further includes a third optical array and a fourth optical array, and the third optical array, the second variable refractive index light-transmitting layer and the fourth optical array are sequentially disposed on a side of the first variable refractive index light-transmitting layer, which is opposite to the laser module; the third optical array comprises a plurality of light spot compression units, and each light spot compression unit is arranged corresponding to the laser emitter; the fourth optical array comprises a plurality of light receiving units, and each light receiving unit is arranged corresponding to the laser transmitter.
Optionally, the spot compression unit is provided with multiple layers along the optical axis direction.
Optionally, the third optical array is located between the first variable refractive index light transmission layer and the diffuse light transmission layer.
Optionally, in the optical axis direction, the optical units of the optical arrays and adjacent parts of the light-transmitting layer are integrated into a unit assembly, the unit assemblies and the laser emitters are correspondingly arranged in an array, and two adjacent unit assemblies are connected with each other to form the optical array module.
On the other hand, the disclosure provides a projection device, including the light source device, the prism group, the spatial light modulator and the lens assembly as described above, the laser that the laser module sent out passes through after the optical array group, again through the prism group refraction, again through the spatial light modulator reflection, wear out the lens assembly.
In the embodiment of the disclosure, by arranging a plurality of optical arrays, each optical array comprises a plurality of optical units arranged along a plane array perpendicular to an optical axis, and the optical units are correspondingly arranged with the laser transmitters in the laser arrays, so that the use of large-size lens elements is reduced, and the problem of space waste caused by oversized lens elements in the prior art is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those skilled in the art.
Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of an optical array provided in an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a projection apparatus according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural view of a projection apparatus according to another embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a spot compression unit provided in an embodiment of the present disclosure.
Fig. 6 is a schematic structural view of a projection apparatus according to still another embodiment of the present disclosure.
Reference numerals illustrate:
the light source device 10, the prism group 20, the spatial light modulator 30, the lens assembly 40, the laser module 100, the optical array group 200, the spatial light modulator module carrier 110, the laser transmitter 120, the optical unit 201, the optical carrier 202, the first optical array 210, the first variable refractive index light transmission layer 220, the diffuse light transmission layer 230, the second optical array 240, the third optical array 250, the second variable refractive index light transmission layer 260, the fourth optical array 270, the collimator lens unit 211, the dodging unit 241, the flare compression unit 251, the light receiving unit 271, the light receiving element 280, the first block unit 203, the second block unit 204, and the unit assembly 209.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of the disclosure. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the disclosure. In this disclosure, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and in particular to the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
The embodiment of the disclosure provides a projection device and a light source device thereof, which are described in detail below. The following description of the embodiments is not intended to limit the preferred embodiments.
The present disclosure provides a projection device that may be adapted for use in home, educational, work, and outdoor settings. Referring to fig. 1, the projection apparatus includes a light source device 10, a prism group 20, a spatial light modulator 30, and a lens assembly 40, which are disposed in order along an optical axis direction.
Referring to fig. 3, the light source device 10 includes a laser module 100 and an optical array set 200. The laser module 100 includes a module carrier 110 and a plurality of laser emitters 120. The plurality of laser emitters 120 are arranged in an array on the module carrier. The laser emitters 120 are light sources of the projection device, and all laser light emitted by the laser emitters 120 together form projection light rays of the projection device. In some embodiments of the present disclosure, the wavelengths of the lasers emitted by two adjacent laser emitters 120 are different from each other to correspond to different colors, forming red, green and blue lasers. The laser emitters 120 emitting red laser, the laser emitters 120 emitting green laser and the laser emitters 120 emitting blue laser are staggered to form a pixel.
Referring to fig. 2 in combination, the optical array set 200 includes a plurality of optical arrays and at least one light-transmitting layer sequentially disposed on one side of the laser module 100 along the optical axis direction, and the optical arrays include a plurality of optical units 201 disposed along a planar array perpendicular to the optical axis. In this embodiment, the optical units 201 are disposed corresponding to the laser transmitters 120, which may be disposed in a one-to-one correspondence, or one optical unit 201 may be disposed corresponding to a plurality of laser transmitters 120, or one laser transmitter 120 may be disposed corresponding to a plurality of optical units 201. The spatial light modulator 30 is disposed on a side of the prism assembly 20 adjacent to the optical array, and the lens assembly 40 is disposed on a side of the prism assembly 20 facing away from the spatial light modulator 30. In other embodiments, the spatial light modulator 30 may also be disposed on a side of the prism assembly 20 facing away from the optical array assembly 200, and the relative positions of the optical array assembly 200, the laser module 100, the spatial light modulator 30, and the lens assembly 40 with respect to the prism assembly 20 may be set according to specific optical paths, which is not limited in this application.
In the present embodiment, the optical unit 201 is not necessarily arranged along a planar array perpendicular to the optical axis, and may be arranged along a curved surface array perpendicular to the optical axis or along a polygonal line surface array symmetrical about the optical axis.
The laser emitted by each laser emitter 120 passes through the light-transmitting layer and the corresponding optical units, is refracted by the prism group 20 after being processed by the optical units and the light-transmitting layer, is reflected by the spatial light modulator 30, and passes through the lens assembly 40.
The optical arrays are arranged in the embodiment, each optical array comprises a plurality of optical units 201 arranged along a plane array perpendicular to the optical axis, the optical units 201 are correspondingly arranged with the laser emitters 120 in the laser arrays, and the use of large-size lens elements is reduced, so that the problem of space waste caused by oversized lens elements in the prior art is solved.
The spatial light modulator 30 may be a plurality of digital micromirror devices (Digital Micromirror Device, DMD), liquid crystal on silicon (Liquid Crystal on Silicon, LCOS) devices, and other liquid crystal display (Liquid Crystal Display, LCD) devices, as the disclosure is not limited thereto.
The prism assembly 20 may be a polarization beam splitting (polarization beam splitter, PBS) prism, a total reflection (Total internal reflection, TIR) prism, or the like, and the disclosure is not limited thereto.
Referring to fig. 3, fig. 4, and fig. 6, the plurality of optical arrays and at least one light-transmitting layer forming the optical array set 200 include a first optical array 210, a first variable refractive index light-transmitting layer 220, a diffusion light-transmitting layer 230, and a second optical array 240 sequentially arranged along the optical axis direction.
The first optical array 210 includes a plurality of collimating lens units 211 arranged along a plane array perpendicular to the optical axis, where the collimating lens units 211 in this embodiment are fast and slow axis collimating lens units 211 using fast and slow axis collimating lenses, and in other embodiments, the collimating lens units 211 using other types of collimating lenses may also be used. The first variable refractive index transparent layer 220 is disposed on the light-emitting side of the first optical array 210 along the optical axis direction, and is a transparent plate with an area similar to that of the first optical array 210. The light diffusion and transmission layer 230 is disposed on the light emitting side of the first variable refractive index light transmission layer 220 along the optical axis direction, and is a light transmission plate with an area similar to that of the first optical array 210. The second optical array 240 is disposed on a side of the light diffusion and transmission layer 230 away from the laser module 100 along the optical axis direction, and the second optical array 240 includes a plurality of light homogenizing units 241 disposed along a planar array perpendicular to the optical axis.
The collimating lens unit 211, the dodging unit 241 and the laser emitter 120 are in one-to-one correspondence. The laser emitted from the laser emitter 120 passes through the corresponding collimating lens unit 211 and the first variable refractive index transparent layer 220 to become a collimated laser beam, and then passes through the diffusion transparent layer 230 and the corresponding light homogenizing unit 241 to be homogenized and diffused. The homogenized and diffused laser light is subjected to light receiving treatment to form a surface light source with a size matched with that of the spatial light modulator 30. Then, the surface light source is refracted by the prism group 20, enters the spatial light modulator 30, is imaged by the spatial light modulator 30, and is reflected out of the lens assembly 40.
The refractive index of the first variable refractive index light-transmitting layer 220 may be slightly higher than the refractive index of the collimating lens unit 211 or slightly lower than the refractive index of the collimating lens unit 211, so as to ensure that the laser beam is refracted when entering the first variable refractive index light-transmitting layer 220, so as to ensure that the emitted laser beam becomes a collimated laser beam.
In other embodiments, the function of homogenizing and diffusing the laser light can be performed by the diffusion transparent layer 230 alone, and the second optical array 240 is used as an optical array for assisting the diffusion transparent layer 230 to homogenize and diffuse the laser beam, and needs to be disposed next to the diffusion transparent layer 230.
In the present disclosure, there are various ways of performing the light receiving process on the laser light, which will be exemplified below.
In some embodiments of the present disclosure, referring to fig. 3, the laser light is received by the light receiving element 280. In this embodiment, the projection device includes a light receiving element 280 disposed on the light emitting side of the optical array set 200 along the optical axis direction. The light receiving element 280 includes a plurality of lenses for adjusting an area of the surface light source. The laser light homogenized and diffused by the diffusion light-transmitting layer 230 and the light homogenizing unit 241 passes through the light receiving element 280, and is subjected to light receiving treatment by the light receiving element 280 to form a surface light source with a size matched with that of the spatial light modulator 30.
In other embodiments of the present disclosure, referring to fig. 4, the optical array further includes a third optical array 250, and the light-transmitting layer further includes a second variable refractive index light-transmitting layer 260 and a fourth optical array 270. The third optical array 250, the second variable refractive index light transmission layer 260, and the fourth optical array 270 are sequentially disposed in the optical axis direction.
The fourth optical array 270 is disposed at an end of the first refractive index transparent layer 220 away from the laser module 100 along the optical axis direction, and the fourth optical array 270 includes a plurality of light receiving units 271, where each light receiving unit 271 is disposed corresponding to the laser emitter 120. The second variable refractive index light-transmitting layer 260 is disposed on a side of the fourth optical array 270 facing the laser transmitter 120 along the optical axis direction, the third optical array 250 is disposed between the fourth optical array 270 and the first variable refractive index light-transmitting layer 220 along the optical axis direction, and includes a plurality of spot compression units 251 disposed along a planar array perpendicular to the optical axis, each of the spot compression units is disposed corresponding to the laser transmitter 120, and each of the light receiving units 271 is disposed corresponding to the light emitted from the spot compression unit 251.
In one embodiment of the present disclosure, the third optical array 250 is disposed between the first variable refractive index light transmission layer 220 and the diffusion light transmission layer 230. The second variable refractive index light-transmitting layer 260 is disposed on the light-emitting side of the second optical array 240, and the fourth optical array 270 is disposed on the light-emitting side of the second variable refractive index light-transmitting layer 260.
The laser light emitted from the laser emitter 120 passes through the corresponding collimator lens unit 211 and the first variable refractive index light-transmitting layer 220 to become a collimated laser beam. The collimated laser beams pass through the spot compression unit 251 to form collimated laser beams with smaller intervals, the first light receiving process is completed, and then the collimated laser beams pass through the diffusion light-transmitting layer 230 and the corresponding light homogenizing unit 241 to complete homogenization and diffusion. The homogenized and diffused laser beam is subjected to a second light receiving process by the second variable refractive index light-transmitting layer 260 and the corresponding light receiving unit 271, so as to form a surface light source with a size matched with that of the spatial light modulator 30. Then, the surface light source is refracted by the prism group 20, enters the spatial light modulator 30, is imaged by the spatial light modulator 30, and is reflected out of the lens assembly 40.
The second variable refractive index transparent layer 260 is a transparent layer that is matched with the fourth optical array 270 for light receiving treatment, and therefore needs to be disposed closely to the fourth optical array 270. Meanwhile, the refractive index of the second variable refractive index light-transmitting layer 260 may be slightly higher than the refractive index of the diffusion light-transmitting layer 230 and the corresponding light-homogenizing unit 241, or may be slightly lower than the refractive index of the diffusion light-transmitting layer 230 and the corresponding light-homogenizing unit 241, so as to ensure that the laser beam is refracted when entering the second variable refractive index light-transmitting layer 260.
Meanwhile, referring to fig. 5 in combination, the spot compressing unit 251 is composed of a plurality of prisms, and after two parallel collimated laser beams enter the spot compressing unit 251, the two parallel collimated laser beams are refracted by the spot compressing unit 251 and become two parallel collimated laser beams with a closer distance. Therefore, when the laser array has a plurality of rows, a multi-layer process is required, so in this embodiment, the spot compression unit 251 is provided with a plurality of layers in the optical axis direction to compress the plurality of rows of lasers together.
For example, when three rows of lasers need to be compressed, at least two layers of light spot compression arrays are required to be arranged, and lasers on two sides are respectively compressed to lasers in the middle.
In embodiments of the present disclosure, the third optical array 250 may be disposed at any position before the fourth optical array 270, which is not limited herein. When the third optical array 250 is disposed between the first variable refractive index light transmission layer 220 and the diffusion light transmission layer 230, efficiency of compressing laser light can be improved.
In some embodiments of the present disclosure, the optical arrays may be integrally formed, and may be made of transparent materials such as glass, transparent plastic, etc., and cast after being injected into a mold. When the corresponding opening of the optical unit 201 in the mold is maximized, the optical array includes only optical units 201 closely connected in a planar array along the perpendicular optical axis. When the opening corresponding to the optical unit 201 in the mold is smaller, the optical array includes an optical carrier 202 and the optical units 201 arrayed on the optical carrier 202.
In other embodiments of the present disclosure, in the optical axis direction, the optical units of the plurality of optical arrays and the adjacent part of the light-transmitting layer are integrated into a unit assembly 209, the unit assembly 209 and the laser emitter 120 are disposed in a corresponding array, and two adjacent unit assemblies 209 are connected to each other to form an optical array module.
In a specific embodiment, referring to fig. 6, the optical array (except the third optical array 250) may also be formed by a plurality of independent block units, which are the first block units 203. Each of the first block units 203 includes one optical unit 201 therein. The first monolithic units 203 are arranged in an array corresponding to the laser emitters 120, and each first monolithic unit 203 is adhesively connected to an adjacent first monolithic unit 203 to form an optical array.
Also in other embodiments of the present disclosure, the light-transmitting layer may be formed of a plurality of independent block units, which are the second block units 204. Each of the second block units 204 is a light-transmitting block. The second block 204 is provided corresponding to the first block 203. Each block is adhesively connected to an adjacent block along the optical axis to form a block assembly 209. The unit cells 209 are arranged in a corresponding array with the laser emitters 120, and each unit cell 209 is adhesively connected to an adjacent unit cell 209 to form an optical array module.
If the projection apparatus performs the light receiving process by means of the third optical array 250, when the third optical array 250 is located between the second optical array 240 and the second variable refractive index light-transmitting layer 260, the first optical array 210, the first variable refractive index light-transmitting layer 220, the diffuse light-transmitting layer 230 and the second optical array 240 located before the third optical array 250 are all composed of a plurality of independent block units, and are sequentially bonded by a plurality of block units along the optical axis direction, so as to form the unit assembly 209. When the third optical array 250 is located between the first variable refractive index light-transmitting layer 220 and the diffuse light-transmitting layer 230, the block units constituting the first optical array 210 and the first variable refractive index light-transmitting layer 220 are sequentially connected along the optical axis direction to form the first unit assembly 209, and the block units constituting the diffuse light-transmitting layer 230, the second optical array 240, the second variable refractive index light-transmitting layer 260 and the fourth optical array 270 are sequentially bonded along the optical axis direction to form the second unit assembly 209.
The above describes in detail a projection device and a light source device thereof provided by embodiments of the present disclosure, and specific examples are applied herein to illustrate principles and embodiments of the present disclosure, where the above description of the embodiments is only for helping to understand the method of the present disclosure and its core ideas; meanwhile, as those skilled in the art will appreciate from the idea of the present disclosure, there are variations in the specific embodiments and the application scope, and in light of the above, the present disclosure should not be construed as being limited to the present disclosure.
Claims (6)
1. A light source device, characterized by comprising
The laser module comprises a plurality of laser transmitters arranged in an array;
the optical array group comprises a plurality of optical arrays which are sequentially arranged on one side of the laser module along the direction of an optical axis, each optical array comprises a plurality of optical units which are arranged in an array manner along the direction vertical to the optical axis, and each optical unit is correspondingly arranged with the laser emitter; the plurality of optical arrays comprise a first optical array and a second optical array, the first optical array comprises a plurality of collimating lens units, and each collimating lens unit is arranged corresponding to the laser emitter; the second optical array comprises a plurality of light homogenizing units which are arranged along a plane array perpendicular to the optical axis; the collimating lens units, the dodging units and the laser transmitters are in one-to-one correspondence;
the light-transmitting layer comprises a first variable refractive index light-transmitting layer and a diffusion light-transmitting layer, the first variable refractive index light-transmitting layer is arranged on the light emitting side of the first optical array along the direction of the optical axis, the diffusion light-transmitting layer is arranged on the light emitting side of the first variable refractive index light-transmitting layer along the direction of the optical axis, and the diffusion light-transmitting layer is a light-transmitting plate with a layer area similar to that of the first optical array; the refractive index of the first variable refractive index light-transmitting layer is slightly higher than that of the collimating lens unit, or the refractive index of the first variable refractive index light-transmitting layer is slightly lower than that of the collimating lens unit; the second optical array is arranged on the light emitting side of the diffusion light-transmitting layer along the optical axis direction; the laser emitted by each laser emitter passes through a plurality of optical units corresponding to each other;
the at least one light transmission layer further comprises a second variable refractive index light transmission layer, the plurality of optical arrays further comprises a third optical array and a fourth optical array, and the third optical array is arranged between the first variable refractive index light transmission layer and the diffusion light transmission layer; the second variable refractive index light-transmitting layer is arranged on the light emitting side of the second optical array, and the fourth optical array is arranged on the light emitting side of the second variable refractive index light-transmitting layer;
the third optical array comprises a plurality of light spot compression units, and each light spot compression unit is arranged corresponding to the laser emitter; the fourth optical array comprises a plurality of light receiving units, and each light receiving unit is arranged corresponding to the laser transmitter.
2. The light source device according to claim 1, wherein the light source device further comprises:
the light receiving element is arranged on the light emitting side of the optical array group along the optical axis direction.
3. The light source device according to claim 2, wherein the spot compression unit is provided with a plurality of layers in the optical axis direction.
4. The light source device according to claim 2, wherein the at least one light-transmitting layer further comprises a diffusion light-transmitting layer disposed on a light-emitting side of the first variable refractive index light-transmitting layer in an optical axis direction, and the third optical array is located between the first variable refractive index light-transmitting layer and the diffusion light-transmitting layer.
5. A light source device according to any one of claims 1 to 4, wherein in the optical axis direction, the optical units of the plurality of optical arrays and adjacent portions of the light-transmitting layer are integrated into a unit assembly, the plurality of unit assemblies are arranged in correspondence with the plurality of laser emitters in an array, and the two adjacent unit assemblies are connected to each other to form an optical array module.
6. A projection device, comprising a prism group, a spatial light modulator, a lens assembly and a light source device according to any one of claims 1 to 5, wherein the laser emitted by the laser module passes through the optical array group, passes through the prism group, and then is modulated by the spatial light modulator to be emitted from the lens assembly.
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| CN202111160048.5A CN113867090B (en) | 2021-09-30 | 2021-09-30 | Projection apparatus and light source device thereof |
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| CN202111160048.5A CN113867090B (en) | 2021-09-30 | 2021-09-30 | Projection apparatus and light source device thereof |
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