CN114217429A - Total reflection prism optical system for coupling and light evening of two groups of laser modules - Google Patents
Total reflection prism optical system for coupling and light evening of two groups of laser modules Download PDFInfo
- Publication number
- CN114217429A CN114217429A CN202210156396.3A CN202210156396A CN114217429A CN 114217429 A CN114217429 A CN 114217429A CN 202210156396 A CN202210156396 A CN 202210156396A CN 114217429 A CN114217429 A CN 114217429A
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- total reflection
- fly
- reflection prism
- laser
- lens array
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
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- 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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
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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
- G03B21/142—Adjusting of projection optics
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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
- G03B21/2066—Reflectors in illumination beam
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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 relates to a total reflection prism optical system for coupling and homogenizing two groups of laser modules, which comprises a first laser module, a second laser module, a total reflection prism, a second prism, a interzone reflector, a first fly-eye lens array, a second fly-eye lens array, a third fly-eye lens array and a condenser lens group. The invention utilizes the light refraction and reflection principle and the total reflection principle, obtains an initial structure through mathematical calculation, and utilizes the optimization design of software simulation verification, so that the structure is precise, the volume is small, the light source brightness in a certain area is improved, and the good light homogenizing effect is realized.
Description
Technical Field
The invention belongs to a projection light source technology in the photoelectric display industry, and particularly relates to a total reflection prism optical system for coupling and homogenizing two groups of laser modules.
Background
At present, the arrangement of single laser in a horizontal and vertical array form to make a laser module is one of the main forms of laser light sources. The lasers are sensitive to the working temperature, the heat dissipation capacity of the lasers needs to be improved by increasing external packaging, and the lasers cannot be closely arranged. After the laser module is made, a large gap is left between the lasers, so that the number of the arranged lasers in a certain area is limited. Meanwhile, no light beam passes through the area between the lasers of the group of laser modules, and the laser beam is increased in the gap between the lasers, so that the laser brightness in a certain area can be improved.
The collimated light beam emitted by the laser can easily realize the dodging effect by utilizing the dodging characteristic that the collimated light beam penetrates through the fly eye lens array twice. How to combine the improvement of the laser brightness of a certain area with the dodging property of the fly-eye lens can reduce the volume of the optical layout while improving the brightness, and is a main problem solved by the invention.
Disclosure of Invention
The invention aims to improve the brightness of a light source in a certain area by mutually inserting the light beams of two groups of laser modules and utilizing the gap between the lasers. The dodging effect is realized by utilizing the dodging characteristic that the collimated light beam penetrates through the fly eye lens array twice.
The invention is realized in that two groups of laser modules can converge light beams on the same plane, namely near the light-emitting surface of the total reflection prism through the convergence of the fly-eye lens and the refraction of the prism and the total reflection prism respectively. The prism and the total reflection prism are closer to the light-emitting surface of the total reflection prism than the incident surface converged by the fly-eye lens array, so that the light beams of the two groups of laser modules can be inserted into each other. The strip-shaped reflecting area and the strip-shaped transmitting area are repeatedly overlapped to form the inter-band reflecting mirror between the prism and the total reflection prism, the light spot of the condensed light falling on the inter-band reflecting mirror is small, and the brightness loss during mutual insertion is reduced. A fly-eye lens array is arranged on a light-emitting surface of the total reflection prism, light beams of the two groups of laser modules are converged on the same fly-eye lens array and are converged and superposed at the same position through a condenser lens group, and uniform light spots are formed.
The structure adopted by the invention is as follows: a total reflection prism optical system for coupling and homogenizing two groups of laser modules comprises a first laser module, a second laser module, a total reflection prism, a second prism, a interzone reflector, a first fly-eye lens array, a second fly-eye lens array, a third fly-eye lens array and a condenser lens group; the collimated light beams of the single laser of the first laser module are converged by the first fly-eye lens array, the light beams penetrate through the first surface of the total reflection prism, are totally reflected on the third surface of the total reflection prism, are refracted on the second surface of the total reflection prism, are reflected in the reflection area with the reflecting mirror in between, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism, and are converged on the corresponding lens of the third fly-eye lens array; collimated light beams of a single laser of the second laser module are converged by the second fly-eye lens array, the light beams penetrate through the fourth surface of the second prism, are refracted on the fifth surface of the second prism, pass through a transmission area with a reflector, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism and are converged on a corresponding lens of the third fly-eye lens array; the light beams converged on the corresponding lenses of the third fly-eye lens array are converged and superposed at the same position through the condenser lens group to form uniform light spots.
Preferably, the optical path lengths of the light beam emitted by the single laser of the first laser module from the first surface of the total reflection prism and the light beam emitted by the single laser of the second laser module from the fourth surface of the second prism to the third surface of the total reflection prism are equal.
Further, all the single laser beams of the first laser module and the second laser module are parallel to each other between the main optical axes of the second surface and the third surface of the total reflection prism.
Furthermore, the single lenses of the first fly-eye lens array and the second fly-eye lens array respectively correspond to the laser of the first laser module and the laser of the second laser module, and the laser beams are respectively converged to the single lens of the third fly-eye lens array through reflection or transmission of the interzone reflecting mirror.
Further, the inter-band reflector is formed by repeatedly overlapping strip-shaped reflecting areas and transmission areas.
Furthermore, the condenser lens group is composed of a single lens or a plurality of lenses, and the light beams converged on the corresponding lens of the third fly-eye lens array are converged and superposed at the same position through the condenser lens group to form uniform light spots.
The invention has the beneficial effects that: the two groups of laser modules can converge light beams on the same plane, namely, near the light-emitting surface of the total reflection prism through the convergence of the fly-eye lens and the refraction of the prism and the total reflection prism respectively. The prism and the total reflection prism are closer to the light-emitting surface of the total reflection prism than the incident surface converged by the fly-eye lens array, so that the light beams of the two groups of laser modules can be inserted into each other. The strip-shaped reflecting area and the strip-shaped transmitting area are repeatedly overlapped to form the inter-band reflecting mirror between the prism and the total reflection prism, the light spot of the condensed light falling on the inter-band reflecting mirror is small, and the brightness loss during mutual insertion is reduced. A fly-eye lens array is arranged on the light-emitting surface of the total reflection prism, light beams of the two groups of laser modules are converged on the same fly-eye lens array and are converged and superposed at the same position through a condenser lens group to form uniform light spots; by utilizing the light refraction and reflection principle and the total reflection principle, the initial structure is obtained through mathematical calculation, and the optimization design of software simulation verification is utilized, so that the structure is precise, the size is small, the light source brightness in a certain area is improved, and a good light homogenizing effect is realized.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
The structure adopted by the invention in fig. 1 is: a total reflection prism optical system for coupling and homogenizing two groups of laser modules comprises a first laser module 1, a second laser module 2, a total reflection prism 3, a second prism 4, a interzone reflector 5, a first fly-eye lens array 6, a second fly-eye lens array 7, a third fly-eye lens array 8 and a condenser lens group 9; collimated light beams of a single laser of the first laser module are converged by the first fly-eye lens array 6, the light beams penetrate through the first surface 10 of the total reflection prism, are totally reflected on the third surface 12 of the total reflection prism, are refracted on the second surface 11 of the total reflection prism, are reflected in a reflection area with a reflector, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism, and are converged on a corresponding lens of the third fly-eye lens array; collimated light beams of a single laser of the second laser module are converged by the second fly-eye lens array, the light beams penetrate through the fourth surface 13 of the second prism, are refracted on the fifth surface 14 of the second prism, pass through a transmission area with a reflector, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism and are converged on a corresponding lens of the third fly-eye lens array; the light beams converged on the corresponding lenses of the third fly-eye lens array are converged and superposed at the same position through the condenser lens group to form uniform light spots 15.
The optical path lengths of the light beams emitted by the single laser of the first laser module 1 from the first surface 10 of the total reflection prism 3 and the light beams emitted by the single laser of the second laser module 2 from the fourth surface 13 of the second prism 4 to the third surface 12 of the total reflection prism 3 are equal.
All the individual laser beams of the first laser module 1 and the second laser module 2 are parallel to each other between the main optical axes of the second facet 11 and the third facet 12 of the total reflection prism 3.
The single lenses of the first fly-eye lens array 6 and the second fly-eye lens array 7 correspond to the laser of the first laser module 1 and the laser of the second laser module 2 respectively, and laser beams are converged to the single lens of the third fly-eye lens array 8 respectively through reflection or transmission of the interzone reflecting mirror 5.
The inter-band mirror 5 is formed by repeatedly overlapping strip-shaped reflection areas and transmission areas.
The condenser lens group 9 is composed of a single lens or a plurality of lenses, and the light beams converged on the corresponding lens of the third fly-eye lens array 8 are converged and superposed at the same position through the condenser lens group to form uniform light spots.
The invention is realized in that two groups of laser modules can converge light beams on the same plane, namely near the light-emitting surface of the total reflection prism through the convergence of the fly-eye lens and the refraction of the prism and the total reflection prism respectively. The prism and the total reflection prism are closer to the light-emitting surface of the total reflection prism than the incident surface converged by the fly-eye lens array, so that the light beams of the two groups of laser modules can be inserted into each other. The strip-shaped reflecting area and the strip-shaped transmitting area are repeatedly overlapped to form the inter-band reflecting mirror between the prism and the total reflection prism, the light spot of the condensed light falling on the inter-band reflecting mirror is small, and the brightness loss during mutual insertion is reduced. A fly-eye lens array is arranged on a light-emitting surface of the total reflection prism, light beams of the two groups of laser modules are converged on the same fly-eye lens array and are converged and superposed at the same position through a condenser lens group, and uniform light spots are formed.
The invention provides a total reflection prism optical system for coupling and light homogenizing two groups of laser modules, which utilizes the light refraction and reflection principle and the total reflection principle, obtains an initial structure through mathematical calculation, and utilizes the optimization design of software simulation verification, so that the structure is precise, the volume is small, the light source brightness in a certain area is improved, and a good light homogenizing effect is realized.
Claims (6)
1. A total reflection prism optical system for coupling and homogenizing two groups of laser modules is characterized by comprising a first laser module (1), a second laser module (2), a total reflection prism (3), a second prism (4), a zonal reflector (5), a first fly-eye lens array (6), a second fly-eye lens array (7), a third fly-eye lens array (8) and a condenser lens group (9); collimated light beams of the single laser of the first laser module are converged through a first fly-eye lens array (6), the light beams penetrate through a first surface (10) of a total reflection prism, are totally reflected on a third surface (12) of the total reflection prism, are refracted on a second surface (11) of the total reflection prism, are reflected in a reflection area with a reflector, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism, and are converged on a corresponding lens of a third fly-eye lens array; collimated light beams of a single laser of the second laser module are converged by the second fly-eye lens array, the light beams penetrate through the fourth surface (13) of the second prism, are refracted on the fifth surface (14) of the second prism, pass through a transmission area with a reflector, are refracted on the second surface of the total reflection prism, penetrate through the third surface of the total reflection prism and are converged on a corresponding lens of the third fly-eye lens array; the light beams converged on the corresponding lenses of the third fly-eye lens array are converged and superposed at the same position through the condenser lens group to form uniform light spots (15).
2. The total reflection prism optical system for coupling and homogenizing two laser modules as claimed in claim 1, wherein: the optical path lengths of the light beams emitted by the single laser of the first laser module (1) from the first surface (10) of the total reflection prism (3) and the light beams emitted by the single laser of the second laser module (2) from the fourth surface (13) of the second prism (4) to the third surface (12) of the total reflection prism (3) are equal.
3. The total reflection prism optical system according to claim 1, characterized in that: all the single laser beams of the first laser module (1) and the second laser module (2) are parallel to each other between the main optical axes of the second surface (11) and the third surface (12) of the total reflection prism (3).
4. The total reflection prism optical system according to claim 1, characterized in that:
the single lenses of the first fly-eye lens array (6) and the second fly-eye lens array (7) respectively correspond to the laser of the first laser module (1) and the laser of the second laser module (2), and laser beams are respectively converged to the single lens of the third fly-eye lens array (8) through reflection or transmission of the interzone reflector (5).
5. The total reflection prism optical system according to claim 1, characterized in that: the inter-band reflector (5) is formed by repeatedly overlapping strip-shaped reflecting areas and transmission areas.
6. The total reflection prism optical system according to claim 1, characterized in that: the condenser lens group (9) is composed of one or more lenses, and light beams converged on corresponding lenses of the third fly-eye lens array (8) are converged and superposed at the same position through the condenser lens group to form uniform light spots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210156396.3A CN114217429A (en) | 2022-02-21 | 2022-02-21 | Total reflection prism optical system for coupling and light evening of two groups of laser modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210156396.3A CN114217429A (en) | 2022-02-21 | 2022-02-21 | Total reflection prism optical system for coupling and light evening of two groups of laser modules |
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| Publication Number | Publication Date |
|---|---|
| CN114217429A true CN114217429A (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210156396.3A Pending CN114217429A (en) | 2022-02-21 | 2022-02-21 | Total reflection prism optical system for coupling and light evening of two groups of laser modules |
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| CN (1) | CN114217429A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070253197A1 (en) * | 2006-05-01 | 2007-11-01 | Coretronic Corporation | Light-emitting diode light source system |
| CN101988631A (en) * | 2009-07-31 | 2011-03-23 | 深圳市光峰光电技术有限公司 | LED stage lighting device and method for improving color uniformity of LED stage lighting device |
| CN102297389A (en) * | 2011-05-16 | 2011-12-28 | 深圳市光峰光电技术有限公司 | Laser array composite light module |
| CN208270923U (en) * | 2018-04-29 | 2018-12-21 | 中国华录集团有限公司 | A kind of laser projection is shown with uniform light board lens integral system |
-
2022
- 2022-02-21 CN CN202210156396.3A patent/CN114217429A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070253197A1 (en) * | 2006-05-01 | 2007-11-01 | Coretronic Corporation | Light-emitting diode light source system |
| CN101988631A (en) * | 2009-07-31 | 2011-03-23 | 深圳市光峰光电技术有限公司 | LED stage lighting device and method for improving color uniformity of LED stage lighting device |
| CN102297389A (en) * | 2011-05-16 | 2011-12-28 | 深圳市光峰光电技术有限公司 | Laser array composite light module |
| CN208270923U (en) * | 2018-04-29 | 2018-12-21 | 中国华录集团有限公司 | A kind of laser projection is shown with uniform light board lens integral system |
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Application publication date: 20220322 |
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