CN210465974U - Laser beam combining device - Google Patents
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- CN210465974U CN210465974U CN201920865944.3U CN201920865944U CN210465974U CN 210465974 U CN210465974 U CN 210465974U CN 201920865944 U CN201920865944 U CN 201920865944U CN 210465974 U CN210465974 U CN 210465974U
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Abstract
The utility model relates to a laser beam combining device belongs to laser projection display technology field. The utility model aims at solving the technical problem that the volume of the existing laser coupling device is large and the homogenization of the white light synthesis is poor. The technical scheme of the utility model is that: a laser beam combining device comprises four red lasers, two green lasers, two blue lasers, 1/2 wave plates, two reflectors, two X-ray frames, four color combining mirrors, a converging mirror and optical fibers, wherein the red lasers, the green lasers and the blue lasers are positioned at the same horizontal position in the spatial position, 1/2 wave plates are arranged above the two red lasers, and the reflectors are arranged above 1/2 wave plates; an X-ray frame is arranged above the other two red lasers, and a first color-combining mirror and a second color-combining mirror are arranged above the green laser; a third color-combining mirror and a fourth color-combining mirror are arranged above the blue laser; the converging lens is vertically positioned in the axial direction of emergent light of the third color combiner and the fourth color combiner; the optical fiber is arranged on one side of the converging mirror.
Description
Technical Field
The utility model relates to a laser beam combining device belongs to laser projection display technology field.
Background
In modern learning and office environments, projectors are one of the most commonly used devices. The traditional projector uses a three-color light-emitting diode chip as a light source, and the semiconductor laser has low single power and higher heating density, so the integration volume is larger; no matter the red, green and blue laser coupling mode adopts space coupling or optical fiber coupling, the uniformity of a synthesized white field is poor, and the quality of a projected image is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem that the volume is big and the white light synthesis homogenization is poor that current laser coupling device exists, providing a laser beam combining device.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a laser beam combining device comprises four red lasers, two green lasers, two blue lasers, 1/2 wave plates, two reflectors, two X-ray frames, four combined color mirrors, a converging mirror and optical fibers, wherein a first red laser, a second red laser, a third red laser, a fourth red laser, a first green laser, a second green laser, a first blue laser and a second blue laser are positioned at the same horizontal position in space, 1/2 wave plates are arranged above the first red laser and the second red laser, and a first reflector and a second reflector are arranged above a 1/2 wave plate; a first X-ray frame is arranged above the third red laser; a second X-ray frame is arranged above the fourth red laser; a first color combining mirror is arranged above the first green laser; a second color combining mirror is arranged above the second green laser; a third color combining mirror is arranged above the first blue laser; a fourth color combining mirror is arranged above the second blue laser; the first reflector, the first X-ray frame, the first color combining mirror and the third color combining mirror are spatially positioned on the same horizontal axis; the second reflecting mirror, the second X-ray frame, the second color combining mirror and the fourth color combining mirror are spatially positioned on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror; the converging mirror is vertically positioned in the axis direction of emergent light of the third color combining mirror and the fourth color combining mirror, and the mirror surface of the converging mirror covers the emergent light of the third color combining mirror and the fourth color combining mirror; the optical fiber is arranged on one side of the converging mirror, and the end face of the optical fiber is positioned at the focus of the converging mirror.
Further, the first X-ray frame and the second X-ray frame are respectively composed of a transmission mirror covered with a film for increasing red light transmissivity and a reflection mirror covered with a film for increasing red light reflectivity.
Furthermore, the surfaces A and B of the first color combining mirror and the second color combining mirror are covered with a thin film for increasing the transmittance of red light, and a thin film for increasing the reflectance of green light; the A surfaces of the third color combining mirror and the fourth color combining mirror are covered with films for increasing the transmissivity of the red light and the green light, and the B surfaces of the third color combining mirror and the fourth color combining mirror are covered with films for increasing the reflectivity of the blue light.
Furthermore, the combined light output by the first X-ray frame and the output light of the first green laser are combined by the first color combining mirror; the combined light output by the second X-ray frame and the output light of the second green laser are combined by the second color combiner; the combined light output by the first color combining mirror and the output light of the first blue laser are combined by the third color combining mirror, and the combined light output by the second color combining mirror and the output light of the second blue laser are combined by the fourth color combining mirror; and the combined light output by the third color combining mirror and the combined light output by the fourth color combining mirror enter the optical fiber through the converging mirror.
The utility model discloses a still another technical scheme is: the device comprises four red lasers, two green lasers, two blue lasers, two 1/2 wave plates, two X-ray frames, four reflectors, four color-combining mirrors, a converging mirror and optical fibers, wherein a first red laser, a second red laser, a third red laser, a fourth red laser, a first green laser, a second green laser, a first blue laser and a second blue laser are positioned at the same horizontal position on the spatial position, a first 1/2 wave plate is arranged above the first red laser, a first X-ray frame is arranged above a first 1/2 wave plate, a first reflector is arranged above the first X-ray frame, and a third reflector is arranged above the second red laser; a second 1/2 wave plate is arranged above the third red laser, a second X-ray frame is arranged above the second 1/2 wave plate, a second reflecting mirror is arranged above the second X-ray frame, and a fourth reflecting mirror is arranged above the fourth red laser; a first color combining mirror is arranged above the first green laser; a second color combining mirror is arranged above the second green laser; a third color combining mirror is arranged above the first blue laser; a fourth color combining mirror is arranged above the second blue laser; the first reflecting mirror, the first color combining mirror and the third color combining mirror are spatially positioned on the same horizontal axis; the second reflecting mirror, the second color combining mirror and the fourth color combining mirror are spatially positioned on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror; the converging mirror is vertically positioned in the axis direction of emergent light of the third color combining mirror and the fourth color combining mirror, and the mirror surface of the converging mirror covers the emergent light of the third color combining mirror and the fourth color combining mirror; the optical fiber is arranged on one side of the converging mirror, and the end face of the optical fiber is positioned at the focus of the converging mirror.
The utility model has the advantages that: the utility model realizes the beam combination of the laser with the same wavelength by the combined use of the 1/2 wave plate and the X-ray frame; the two sides of the color combining mirror are covered with the transmission film and the reflection film aiming at the lasers with different wavelengths, so that the beam combining of the lasers with different wavelengths is realized, the cost performance of the device is improved, and the volume of the device is reduced. The technical problems of large volume and poor white light synthesis homogenization of the existing laser coupling device are solved. Compared with the prior art, the utility model has the advantages of can effectively promote synthetic white light homogeneity to improve the device price/performance ratio, reduce the device volume.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural view of the middle X-ray frame of the present invention.
In the figure, 1-first red laser, 2-second red laser, 3-third red laser, 4-fourth red laser, 5-first green laser, 6-second green laser, 7-first blue laser, 8-second blue laser, 9-1/2 wave plate, 10-first reflector, 11-second reflector, 12-first X-ray frame, 13-second X-ray frame, 14-first color combiner, 15-second color combiner, 16-third color combiner, 17-fourth color combiner, 18-converging mirror, 19-optical fiber, 20, 22-transmitting mirror coated with film for increasing red light transmittance, 21, 23-reflector coated with film for increasing red light reflectance, 24, 26-film for increasing red light transmittance, 25. 27-film to increase the reflectivity of green light, 28, 30-film to increase the transmissivity of red and green light, 29, 31-film to increase the reflectivity of blue light, 91-first 1/2 wave plate, 92-second 1/2 wave plate, 101-third mirror, 102-fourth mirror.
Detailed Description
The technical solution of the present invention is described clearly and completely with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a laser beam combining apparatus in this embodiment includes four red lasers 1 to 4, two green lasers 5 and 6, two blue lasers 7 and 8, 1/2 wave plates 9, two reflecting mirrors 10 and 11, two X-ray frames 12 and 13, four color combining mirrors 14 to 17, a converging mirror 18 and an optical fiber 19, where the first red laser 1, the second red laser 2, the third red laser 3, the fourth red laser 4, the first green laser 5, the second green laser 6, the first blue laser 7 and the second blue laser 8 are at the same horizontal position in space, a 1/2 wave plate 9 is disposed above the first red laser 1 and the second red laser 2, and the first reflecting mirror 10 and the second reflecting mirror 11 are disposed above the 1/2 wave plate 9; a first X-ray frame 12 is arranged above the third red laser 3; a second X-ray frame 13 is arranged above the fourth red laser 4; a first color combining mirror 14 is arranged above the first green laser 5; a second color combining mirror 15 is arranged above the second green laser 6; a third color combining mirror 16 is arranged above the first blue laser 7; a fourth color-combining mirror 17 is arranged above the second blue laser 8; the first reflecting mirror 10, the first X-ray frame 12, the first color combining mirror 14 and the third color combining mirror 16 are spatially located on the same horizontal axis; the second reflecting mirror 11, the second X-ray frame 13, the second color combining mirror 15 and the fourth color combining mirror 17 are spatially located on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror 10; the converging lens 18 is vertically positioned in the axial direction of the emergent light of the third color combining mirror 16 and the fourth color combining mirror 17, and the mirror surface of the converging lens covers the emergent light of the third color combining mirror 16 and the fourth color combining mirror 17; the optical fiber 19 is arranged at one side of the converging mirror 18, and the end face of the optical fiber is positioned at the focus of the converging mirror 18.
The first X-ray frame 12 is composed of a transmission mirror 20 coated with a film for increasing red light transmittance and a reflection mirror 21 coated with a film for increasing red light reflectance; the second X-ray frame 13 is composed of a transmission mirror 22 coated with a film for increasing red light transmittance and a reflection mirror 23 coated with a film for increasing red light reflectance.
The surface A of the first color combining mirror 14 is covered with a thin film 24 for increasing the transmittance of red light, and the surface B is covered with a thin film 25 for increasing the reflectance of green light; the surface A of the second color combining mirror 15 is covered with a film 26 for increasing the red light transmittance, and the surface B is covered with a film 27 for increasing the green light reflectance; the surface A of the third color combining mirror 16 is covered with a thin film 28 for increasing the transmittance of red light and green light, and the surface B is covered with a thin film 29 for increasing the reflectance of blue light; the surface a of the fourth color combining mirror 17 is covered with a thin film 30 for increasing the transmittance of red and green light, and the surface B is covered with a thin film 31 for increasing the reflectance of blue light.
The converging lens 18 is a plano-convex lens or a biconvex lens.
First red laser 1, second red laser 2, third red laser 3 and fourth red laser 4 be the laser instrument of same model, the output wave band is: lambda [ alpha ]1(ii) a First green laser 5 and second green laser 6 be the laser instrument of same model, the output wave band is: lambda [ alpha ]2(ii) a What is needed isThe first blue laser 7 and the second green laser 8 are lasers of the same type, and the output waveband is as follows: lambda [ alpha ]3(ii) a The applicable wave band of the film for increasing the red light transmissivity is lambda1The applicable wave band of the film for increasing the reflectivity of the red light is lambda1The suitable wave band of the film for increasing the reflectivity of the green light is lambda2The suitable wave band of the film for increasing the transmittance of the red light and the green light is lambda1And λ2The suitable wave band of the film for increasing the reflectivity of blue light is lambda3. The number of red, green and blue lasers is proportioned, so that the uniformity of synthesized white light is effectively improved, the cost performance of the device is improved, and the volume of the device is reduced.
In the laser beam combining device in this embodiment, the output light of the first red laser 1 passes through the 1/2 wave plate to make the polarization state of the red light rotate by 90 °, and the output light of the second red laser 2 passes through the 1/2 wave plate to make the polarization state of the red light rotate by 90 °. Two beams of red light output by the polarizer are reflected by a first reflecting mirror 10 and a second reflecting mirror 11 with an angle of 45 degrees respectively. The polarization state of the red light passing through the first reflector 10 is orthogonal to that of the output light of the third red laser 3, and the beams are combined by using a first X-ray frame 12; the red light passing through the second mirror 11 is orthogonal to the polarization of the output light of the fourth red laser 4 and is combined by the second X-ray frame 13.
The combined light output by the first X-ray frame 12 and the output light of the first green laser 5 are combined by the first color combiner 14; the combined light output by the second X-ray frame 13 and the output light of the second green laser 6 are combined by the second color combiner 15; the combined light output by the first color combining mirror 14 and the output light of the first blue laser 7 are combined by the third color combining mirror 16, and the combined light output by the second color combining mirror 15 and the output light of the second blue laser 8 are combined by the fourth color combining mirror 17; the combined light output by the third color combiner 16 and the combined light output by the fourth color combiner 17 enter an optical fiber 19 through a converging mirror 18.
Example 2
As shown in fig. 2, a laser beam combining apparatus in this embodiment includes four red lasers 1 to 4, two green lasers 5 and 6, two blue lasers 7 and 8, two 1/2 wave plates 91 and 92, two X-ray frames 12 and 13, four mirrors 10, 11, 101 and 102, four color combining mirrors 14 to 17, a converging mirror 18, and an optical fiber 19, where the first red laser 1, the second red laser 2, the third red laser 3, the fourth red laser 4, the first green laser 5, the second green laser 6, the first blue laser 7, and the second blue laser 8 are at the same horizontal position in space, a first 1/2 wave plate 91 is disposed above the first red laser 1, a first X-ray frame 12 is disposed above the first 1/2 91, a first mirror 10 is disposed above the first X-ray frame 12, a third reflector 101 is arranged above the second red laser 2; a second 1/2 wave plate 92 is arranged above the third red laser 3, a second X-ray frame 13 is arranged above the second 1/2 wave plate 92, a second reflecting mirror 11 is arranged above the second X-ray frame 13, and a fourth reflecting mirror 102 is arranged above the fourth red laser 4; a first color combining mirror 14 is arranged above the first green laser 5; a second color combining mirror 15 is arranged above the second green laser 6; a third color combining mirror 16 is arranged above the first blue laser 7; a fourth color-combining mirror 17 is arranged above the second blue laser 8; the first reflecting mirror 10, the first color combining mirror 14 and the third color combining mirror 16 are spatially located on the same horizontal axis; the second reflecting mirror 11, the second color combining mirror 15 and the fourth color combining mirror 17 are spatially positioned on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror 10; the converging lens 18 is vertically positioned in the axial direction of the emergent light of the third color combining mirror 16 and the fourth color combining mirror 17, and the mirror surface of the converging lens covers the emergent light of the third color combining mirror 16 and the fourth color combining mirror 17; the optical fiber 19 is arranged at one side of the converging mirror 18, and the end face of the optical fiber is positioned at the focus of the converging mirror 18.
The first X-ray frame 12 is composed of a transmission mirror 20 coated with a film for increasing red light transmittance and a reflection mirror 21 coated with a film for increasing red light reflectance; the second X-ray frame 13 is composed of a transmission mirror 22 coated with a film for increasing red light transmittance and a reflection mirror 23 coated with a film for increasing red light reflectance. The surface A of the first color combining mirror 14 is covered with a thin film 24 for increasing the transmittance of red light, and the surface B is covered with a thin film 25 for increasing the reflectance of green light; the surface A of the second color combining mirror 15 is covered with a film 26 for increasing the red light transmittance, and the surface B is covered with a film 27 for increasing the green light reflectance; the surface A of the third color combining mirror 16 is covered with a thin film 28 for increasing the transmittance of red light and green light, and the surface B is covered with a thin film 29 for increasing the reflectance of blue light; the surface a of the fourth color combining mirror 17 is covered with a thin film 30 for increasing the transmittance of red and green light, and the surface B is covered with a thin film 31 for increasing the reflectance of blue light.
The converging lens 18 is a plano-convex lens or a biconvex lens.
In this embodiment, the output light of the first red laser 1 passes through the first 1/2 wave plate 91 to make the polarization state of the red light rotate by 90 °, the output light of the second red laser 2 is reflected by the third reflecting mirror 101 with an angle of 45 °, the reflected red light and the red light whose polarization state generates 90 ° rotation are combined by the first X-ray frame 12, and the output wavelength bands of the first red laser 1 and the second red laser 2 are: lambda [ alpha ]1。
The output light of the third red laser 3 passes through a second 1/2 wave plate 92 to make the polarization state of the red light rotate by 90 degrees, the output light of the fourth red laser 4 is reflected by a fourth reflector 102 with an angle of 45 degrees, the reflected red light and the polarization state generate 90-degree rotated red light, and the red light is combined by a second X-ray frame 13, and the output wave bands of the third red laser 3 and the fourth red laser 4 are: lambda [ alpha ]1。
The combined beam red light passing through the first X-ray frame 12 is reflected by a first reflector 10 with an angle of 45 degrees and then transmitted; the combined red light beam passing through the second X-ray frame 13 is reflected by the second reflecting mirror 11 at an angle of 45 ° and then transmitted.
The red light reflected by the first reflector 10 and the output light of the first green laser 5 are combined by a first color combiner 14; the red light reflected by the second reflecting mirror 11 and the output light of the second green laser 6 are combined by the second color combining mirror 15. The output wave bands of the first green laser 5 and the second green laser 6 are as follows: lambda [ alpha ]2。
The combined light output by the first color combining mirror 14 and the output light of the first blue laser 7 are combined by the third color combining mirror 16; and the combined light output by the second color combining mirror 15 and the output light of the second blue laser 8 are combined by a fourth color combining mirror 17. The output wave bands of the first blue laser 7 and the second green laser 8 are as follows: lambda [ alpha ]3。
The combined light output by the third color combining mirror 16 and the combined light output by the fourth color combining mirror 17 enter an optical fiber 19 through a converging mirror 18.
Claims (5)
1. A laser beam combining device is characterized in that: comprises four red lasers (1-4), two green lasers (5, 6), two blue lasers (7, 8), 1/2 wave plate (9), two reflectors (10, 11), two X-ray frames (12, 13), four color-combining mirrors (14-17), a converging mirror (18) and an optical fiber (19), wherein the first red laser (1), the second red laser (2), the third red laser (3), the fourth red laser (4), the first green laser (5), the second green laser (6), the first blue laser (7) and the second blue laser (8) are at the same horizontal position in space, 1/2 wave plate (9) is arranged above the first red laser (1) and the second red laser (2), a first reflecting mirror (10) and a second reflecting mirror (11) are arranged above the 1/2 wave plate (9); a first X-ray frame (12) is arranged above the third red laser (3); a second X-ray frame (13) is arranged above the fourth red laser (4); a first color-combining mirror (14) is arranged above the first green laser (5); a second color-combining mirror (15) is arranged above the second green laser (6); a third color-combining mirror (16) is arranged above the first blue laser (7); a fourth color-combining mirror (17) is arranged above the second blue laser (8); the first reflecting mirror (10), the first X-ray frame (12), the first color combining mirror (14) and the third color combining mirror (16) are positioned on the same horizontal axis in space; the second reflecting mirror (11), the second X-ray frame (13), the second color combining mirror (15) and the fourth color combining mirror (17) are spatially positioned on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror (10); the converging lens (18) is vertically positioned in the axial direction of emergent light of the third color combining lens (16) and the fourth color combining lens (17), and the mirror surface of the converging lens covers the emergent light of the third color combining lens (16) and the fourth color combining lens (17); the optical fiber (19) is arranged on one side of the converging mirror (18), and the end face of the optical fiber is positioned at the focus of the converging mirror (18).
2. The laser beam combining apparatus of claim 1, wherein: the first X-ray frame (12) and the second X-ray frame (13) are respectively composed of a transmission mirror covered with a film for increasing red light transmissivity and a reflection mirror covered with a film for increasing red light reflectivity.
3. The laser beam combining apparatus of claim 1, wherein: the surfaces A and B of the first color combining mirror (14) and the second color combining mirror (15) are covered with films for increasing the transmittance of red light, and the surfaces B and B are covered with films for increasing the reflectance of green light; the A surfaces of the third color combining mirror (16) and the fourth color combining mirror (17) are covered with films for increasing the transmittance of red light and green light, and the B surfaces are covered with films for increasing the reflectance of blue light.
4. The laser beam combining apparatus of claim 1, wherein: the combined light output by the first X-ray frame (12) and the output light of the first green laser (5) are combined by the first color combiner (14); the combined light output by the second X-ray frame (13) and the output light of the second green laser (6) are combined by the second color combining mirror (15); the combined light output by the first color combining mirror (14) and the output light of the first blue laser (7) are combined by the third color combining mirror (16), and the combined light output by the second color combining mirror (15) and the output light of the second blue laser (8) are combined by the fourth color combining mirror (17); the combined light output by the third color combining mirror (16) and the combined light output by the fourth color combining mirror (17) enter the optical fiber (19) through the converging mirror (18).
5. A laser beam combining device is characterized in that: the device comprises four red lasers (1-4), two green lasers (5, 6), two blue lasers (7, 8), two 1/2 wave plates (91, 92), two X-ray frames (12, 13), four reflectors (10, 11, 101, 102), four color-combining mirrors (14-17), a converging mirror (18) and an optical fiber (19), wherein a first red laser (1), a second red laser (2), a third red laser (3), a fourth red laser (4), a first green laser (5), a second green laser (6), a first blue laser (7) and a second blue laser (8) are positioned at the same horizontal position in space, a first 1/2 (91) is arranged above the first red laser (1), a first X-ray frame (12) is arranged above a first 1/2 wave plate (91), a first reflector (10) is arranged above the first X-ray frame (12), and a third reflector (101) is arranged above the second red laser (2); a second 1/2 wave plate (92) is arranged above the third red laser (3), a second X-ray frame (13) is arranged above the second 1/2 wave plate (92), a second reflecting mirror (11) is arranged above the second X-ray frame (13), and a fourth reflecting mirror (102) is arranged above the fourth red laser (4); a first color-combining mirror (14) is arranged above the first green laser (5); a second color-combining mirror (15) is arranged above the second green laser (6); a third color-combining mirror (16) is arranged above the first blue laser (7); a fourth color-combining mirror (17) is arranged above the second blue laser (8); the first reflecting mirror (10), the first color combining mirror (14) and the third color combining mirror (16) are positioned on the same horizontal axis in space; the second reflecting mirror (11), the second color-combining mirror (15) and the fourth color-combining mirror (17) are spatially positioned on the same horizontal axis and are lower than the horizontal axis of the first reflecting mirror (10); the converging lens (18) is vertically positioned in the axial direction of emergent light of the third color combining lens (16) and the fourth color combining lens (17), and the mirror surface of the converging lens covers the emergent light of the third color combining lens (16) and the fourth color combining lens (17); the optical fiber (19) is arranged on one side of the converging mirror (18), and the end face of the optical fiber is positioned at the focus of the converging mirror (18).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805419A (en) * | 2020-06-15 | 2021-12-17 | 中强光电股份有限公司 | Illumination system and projection device |
| WO2022037196A1 (en) * | 2020-08-21 | 2022-02-24 | 成都极米科技股份有限公司 | Three-color light source device and projection display device |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805419A (en) * | 2020-06-15 | 2021-12-17 | 中强光电股份有限公司 | Illumination system and projection device |
| CN113805419B (en) * | 2020-06-15 | 2024-02-09 | 中强光电股份有限公司 | Illumination system and projection device |
| WO2022037196A1 (en) * | 2020-08-21 | 2022-02-24 | 成都极米科技股份有限公司 | Three-color light source device and projection display device |
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