CN115509076A - Laser light source module projection light path system - Google Patents
Laser light source module projection light path system Download PDFInfo
- Publication number
- CN115509076A CN115509076A CN202211227248.2A CN202211227248A CN115509076A CN 115509076 A CN115509076 A CN 115509076A CN 202211227248 A CN202211227248 A CN 202211227248A CN 115509076 A CN115509076 A CN 115509076A
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- light
- blue
- dichroic mirror
- light source
- red
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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
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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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
- G03B21/206—Control of light source other than position or intensity
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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
Abstract
The invention discloses a projection light path system of a laser light source module, which comprises a laser light source, a static diffusion sheet, a dichroic mirror with a film-coated partition, a front group lens group, a wavelength conversion device, a small dichroic mirror, a condenser, a color filter device and a light uniformizing device.
Description
Technical Field
The invention relates to the technical field of projection display, in particular to a projection light path system of a laser light source module.
Background
In the prior art, a light source of a projection apparatus generally uses blue laser to excite phosphors to obtain three primary colors of light, so as to realize three primary color illumination. Three schemes are generally adopted for combining the three-color light, one scheme is that after the blue light bypasses through an independent light path 60 in Chinese patent CN110376835A, the blue light and the fluorescent light excited by the blue laser are combined through a dichroic mirror 30, and the related configuration can refer to FIG. 1; the second solution is that chinese patent CN107315312A uses a partitioned dichroic mirror, the middle part reflects blue light to reach the fluorescent wheel, the two sides transmit blue light, and the three colors of light are combined, and the related configuration can be referred to fig. 2. The third scheme is that in chinese patent CN108802986A, blue light is eccentrically arranged, and reaches the fluorescent wheel to excite fluorescence through the reflector and one side of the front group lens assembly, and the blue light is combined with the fluorescence through the other side of the front group lens assembly, and the related configuration can refer to fig. 3.
The existing scheme in fig. 1 designs an independent blue laser light path, which can increase the complexity of the light path, reduce the utilization rate of blue laser, increase the assembly difficulty and the manufacturing cost, and increase the volume of a light source module. In the scheme of fig. 2, blue light is reflected by the middle part of the dichroic mirror, and then the blue light reflected by the fluorescent wheel by the middle part cannot reach a subsequent light path, so that the light efficiency loss of the blue light is caused. The scheme in fig. 3 can influence spot uniformity by eccentrically arranging the blue light, and the small reflector is adopted to reflect the blue light, so that part of the fluorescence of the reflector cannot penetrate through the small reflector, and part of the fluorescence can be lost to influence the spot uniformity of the fluorescence.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a laser light source module projection light path system, which is designed by sharing light paths of three colors, can improve the blue light efficiency by avoiding a blue light loop, reduce the size of an optical machine, reduce optical components and adjust a blue light source by adding a small dichroic mirror so as to avoid the reduction of the uniformity of the blue light.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a laser light source module projection light path system comprises a laser light source, a static diffusion sheet, a dichroic mirror coated in a partitioning mode, a front group lens group, a wavelength conversion device, a small dichroic mirror, a condenser, a color filtering device and a light homogenizing device, wherein the laser light source is a blue laser light source and provides blue exciting light; the dichroic mirror with the film coated in the subareas comprises a first film coating area and a second film coating area, and the first film coating area and the second film coating area reflect or transmit different color light so as to change the light path directions of the different color light; the front group lens group is arranged between the dichroic mirror coated by the subarea and the wavelength conversion device, the small dichroic mirror is arranged at the rear side of the dichroic mirror coated by the subarea and used for adjusting the position of the eccentrically arranged blue light reaching the condenser lens, the condenser lens is arranged between the dichroic mirror coated by the subarea and the color filtering device, and the dodging device is arranged behind the color filtering device.
The system further comprises a beam shrinking lens group, wherein the beam shrinking lens group is positioned on a light emitting path of the laser light source, and when the laser arrays are more, beam shrinking processing is carried out on the laser.
When the number of the blue light source arrays is large, a beam shrinking lens group is required, and when the number of the arrays is small, the beam shrinking lens group is not required;
the further technical scheme is that the blue laser light source is eccentrically arranged.
The small dichroic mirror is mainly used for adjusting the position of the eccentrically arranged blue light reaching the condenser lens so as to avoid the phenomenon that the uniformity of the blue light is reduced;
the further technical scheme is that the first film coating area is used for reflecting blue light and transmitting green light and red light; the second film coating area is used for transmitting blue light, green light and red light.
The further technical scheme is that the first film coating area is used for transmitting blue light and reflecting red light and green light; the second film coating area is used for reflecting blue light, green light and red light.
The further technical scheme is that the first coating area and the second coating area are not equally divided, and the length of the first coating area depends on the position of a blue light source reflected by a secondary color mirror.
The further technical scheme is that the first coating area and the second coating area are not equally divided, and the length of the second coating area depends on the position of the blue light source reflected by the secondary color mirror.
The wavelength conversion device comprises a blue light reflection area and a wavelength conversion area, and can rotate around a central shaft.
The blue laser irradiates the blue light reflection area to be reflected, and the blue laser irradiates the wavelength conversion area to excite other color lights with corresponding wavelengths to be reflected. And the laser lights different areas in a time-sharing way through rotation, and the reflected blue light and the laser light are transmitted in the same direction.
The wavelength conversion region can be a red and green wavelength conversion region, a red and yellow wavelength conversion region, a yellow and green wavelength conversion region, and a red, green and yellow wavelength conversion region.
The color filter device is opposite to the wavelength conversion device and can rotate around a central shaft, and the color filter device comprises blue light, red light and green light transmission area segments or comprises blue light, red light, green light and yellow light transmission area segments.
The working process of the system specifically comprises the following steps: the blue light source is a laser light source, and generated blue light is guided to the front group lens group by the first coating area and reaches the wavelength conversion device after reaching the first coating area of the partitioned dichroic mirror through the static diffusion sheet; when the blue light reaches the blue light reflection region of the wavelength conversion device, the reflected blue light is reflected, passes through the front group lens group to reach the small dichroic mirror, is reflected to the first or second coating region of the subarea dichroic mirror, and then is reflected to the condenser lens; when the blue light reaches the wavelength conversion region of the wavelength conversion device, the blue light is converted into color light with other wavelengths, the color light with other wavelengths continues to pass through the front group lens group to reach the first coating area and the second coating area of the partitioned dichroic mirror, and the first coating area and the second coating area guide the color light with other wavelengths to the collecting lens;
compared with the prior art, the invention has the following beneficial effects: the invention designs the common light path of three-color light (red, green and blue light), the blue light is free of a return circuit, the blue light efficiency can be improved, the size of an optical machine is reduced, optical components are reduced, the blue light is eccentrically arranged, the blue light loss is avoided, the eccentrically arranged blue light can be adjusted by adding the small dichroic mirror, the reduction of the uniformity of the blue laser is avoided, and the phenomenon of the reduction of the fluorescence uniformity is avoided due to the adoption of the dichroic mirror with a partitioned coating.
Drawings
Fig. 1 is a schematic view of a projection optical path system of a laser light source module according to an embodiment of the present invention;
fig. 2 is a schematic view of another projection optical path system of a laser light source module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first scheme of a projection optical path of a conventional monochromatic laser light source module;
FIG. 4 is a schematic diagram of a second scheme of a projection optical path of a conventional monochromatic laser light source module;
fig. 5 is a schematic diagram of a third scheme of a projection light path of a conventional monochromatic laser light source module.
In fig. 1 and 2, 1 is a blue laser light source, 2 is a beam shrinking lens group, 3 is a static diffusion sheet, 4 is a dichroic mirror coated in a partition manner, wherein 4a is a region of red and green light transmission by blue or red and green light transmission by blue, 4b is a region of red and green light transmission by blue or red and green light transmission by blue, 5 is a front group lens group, 6 is a wavelength conversion device, 7 is a small dichroic mirror, red and green light transmission by blue is reflected, 8 is a condenser, 9 is a color filter device, and 10 is a light uniformizing device.
Detailed Description
The optical path system of the present invention is further described by the following embodiments with reference to the accompanying drawings. It should be understood by those skilled in the art that the specific embodiments are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention. In this embodiment, the optical path system provided by the present invention is described by a specific implementation manner, and the light equalizing device in this embodiment is selected as a light bar.
Example 1
As shown in fig. 1, the present embodiment provides a laser projection optical path system, which includes a blue laser light source 1, a static diffusion sheet 3, a dichroic mirror 4 coated by division, a front group lens group 5, a wavelength conversion device 6, a small dichroic mirror 7, a condenser lens 8, a color filter device 9, and a light rod 10.
The blue laser light source 1 selects light sources with less arrays without a beam-shrinking lens group, and the blue laser light source 1 is eccentrically arranged. The dichroic mirror 4 is composed of two parts 4a and 4b, wherein the part 4a reflects blue light and transmits red light, the part 4b transmits blue light, red light and green light, the two parts are not equally divided, and the length of the part 4a is determined according to the position of the blue light source reflected by the small dichroic mirror 7. The wavelength conversion device 6 includes a blue light reflection region and a wavelength conversion region, which may be a red and green wavelength conversion region, a red and yellow wavelength conversion region, a yellow and green wavelength conversion region, and a red, green and yellow wavelength conversion region. The wavelength conversion device 6 realizes the laser time-sharing illumination of different areas through rotation. The color filter means 9 may comprise blue, red and green light-transmissive region segments and may also comprise blue, red, green and yellow light-transmissive region segments.
The blue laser light source 1 passes through the static diffusion sheet 3, is partially reflected by the dichroic mirror 4a, is focused to a blue light reflection area of the wavelength conversion device 6 through the front group lens group 5, is reflected back, is collimated through the front group lens group 5, penetrates through the dichroic mirror 4b, is reflected by the dichroic mirror 7, reaches the dichroic mirror 4a, is partially reflected to the collecting mirror, is converged by the collecting mirror 8, and then enters the light rod 10 through the color filter device 9.
After passing through a static diffusion sheet 3, a blue laser light source 1 reaches a wavelength conversion region of a wavelength conversion device 6 through a dichroic mirror 4a part and a front group lens group 5, excited by received laser light, penetrates through the dichroic mirror 4, is converged through a condenser lens 8, and enters an optical wand 10 through a color filter device 9.
Example 2
As shown in fig. 2, this embodiment provides another laser projection optical path system, which includes a blue laser light source 1, a static diffusion sheet 3, a dichroic mirror 4 coated by regions, a front group lens group 5, a wavelength conversion device 6, a dichroic mirror 7, a condenser 8, a color filter wheel 9, and an optical rod 10.
The blue laser light source 1 selects a light source with less array, and a beam-shrinking lens group is not needed, and the blue laser light source 1 is eccentrically arranged. The dichroic mirror 4 is composed of two parts 4a and 4b, wherein the part 4a transmits blue light to reflect red and green light, the part 4b reflects blue red and green light, the two parts are not equally divided, and the length of the part 4b is determined according to the position of the blue light source reflected by the dichroic mirror 7. The wavelength conversion device 6 includes a blue light reflection region and a wavelength conversion region, which may be a red and green wavelength conversion region, a red and yellow wavelength conversion region, a yellow and green wavelength conversion region, and a red, green and yellow wavelength conversion region. The wavelength conversion device 6 realizes the laser time-sharing illumination of different areas through rotation. The color filtering means 9 may comprise blue, red and green light transmissive region segments and may also comprise blue, red, green and yellow light transmissive region segments.
Blue laser source 1 passes through static diffusion piece 3 after, sees through dichroic mirror 4a part, focuses on the blue light reflecting region of wavelength conversion equipment 6 through front group lens assembly 5 again, reflects back and passes through front group lens assembly 5 collimation again to through dichroic mirror 4b part reflection to dichroic mirror 7, dichroic mirror 7 reflects blue light to dichroic mirror 4b part, and is reflected to the condensing lens, passes through filter device 9 after gathering through condensing lens 8 and gets into optical wand 10.
The blue laser light source 1 passes through the static diffusion sheet 3, reaches the wavelength conversion region of the wavelength conversion device 6 through the dichroic mirror 4a and the front group lens group 5, excites the excited laser, and the excited light is reflected by the dichroic mirror 4, then is converged by the condenser lens 8, and enters the light rod 10 through the color filter device 9.
In conclusion, the three-color light common light path is designed, the blue light loop is omitted, the blue light efficiency can be improved, the size of the optical machine is reduced, optical components are reduced, the blue light loss in the traditional scheme 3 is avoided due to the eccentric arrangement of the blue light, the reduction of the uniformity of the blue laser is avoided due to the fact that the second dichroic mirror is added to adjust the blue light which is eccentrically arranged, and the phenomenon that the uniformity of the fluorescence is reduced is avoided due to the fact that the dichroic mirror with the partitioned film coating is adopted.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (10)
1. A laser light source module projection light path system is characterized by comprising a laser light source, a static diffusion sheet, a dichroic mirror coated in a partitioning mode, a front group of lens groups, a wavelength conversion device, a small dichroic mirror, a condenser lens, a color filter device and a light homogenizing device, wherein the laser light source is a blue laser light source and provides blue exciting light; the dichroic mirror with the film coated in the subareas comprises a first film coating area and a second film coating area, and the first film coating area and the second film coating area reflect or transmit different color light so as to change the light path directions of the different color light; the front group lens set is arranged between the dichroic mirror coated in the subarea and the wavelength conversion device, the small dichroic mirror is arranged on the rear side of the dichroic mirror coated in the subarea and used for adjusting the position of the eccentrically arranged blue light reaching the collecting lens, the collecting lens is arranged between the dichroic mirror coated in the subarea and the color filtering device, and the light homogenizing device is arranged behind the color filtering device.
2. The system of claim 1, further comprising a beam reduction lens set disposed on the light path of the laser source for reducing the beam of the laser beam when the laser array is large.
3. The projection optical path system of the laser light source module according to claim 1, wherein the blue laser light source is eccentrically disposed.
4. The projection optical path system of the laser light source module as claimed in claim 1, wherein the first coating region is configured to reflect blue light and transmit green light and red light; the second film coating area is used for transmitting blue light, green light and red light.
5. The projection optical path system of the laser light source module as claimed in claim 1, wherein the first coating region is configured to transmit blue light and reflect red light and green light; the second film coating area is used for reflecting blue light, green light and red light.
6. The projection optical path system of claim 4, wherein the first and second coating regions are not equally divided, and the length of the first coating region depends on the position of the blue light source reflected by the dichroic mirror.
7. The projection optical path system of claim 5, wherein the first and second coating regions are not equally divided, and the length of the second coating region depends on the position of the blue light source reflected by the dichroic mirror.
8. The system of claim 1, wherein the wavelength conversion device comprises a blue light reflection region and a wavelength conversion region, and the wavelength conversion device is rotatable around a central axis.
9. The system of claim 8, wherein the wavelength converting regions are selected from the group consisting of red and green wavelength converting regions, red and yellow wavelength converting regions, yellow and green wavelength converting regions, and red, green and yellow wavelength converting regions.
10. The projection optical path system of claim 1, wherein the color filter device is located opposite to the wavelength conversion device, the color filter device being rotatable around a central axis, the color filter device comprising blue, red, and green transmissive region segments, or comprising blue, red, green, and yellow transmissive region segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211227248.2A CN115509076A (en) | 2022-10-09 | 2022-10-09 | Laser light source module projection light path system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211227248.2A CN115509076A (en) | 2022-10-09 | 2022-10-09 | Laser light source module projection light path system |
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| CN115509076A true CN115509076A (en) | 2022-12-23 |
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| CN202211227248.2A Pending CN115509076A (en) | 2022-10-09 | 2022-10-09 | Laser light source module projection light path system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115951552A (en) * | 2023-03-09 | 2023-04-11 | 深圳市橙子数字科技有限公司 | Light emitting device and light source system |
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2022
- 2022-10-09 CN CN202211227248.2A patent/CN115509076A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115951552A (en) * | 2023-03-09 | 2023-04-11 | 深圳市橙子数字科技有限公司 | Light emitting device and light source system |
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