CN102436073A - Projection lighting optical path based on semiconductor laser array - Google Patents
Projection lighting optical path based on semiconductor laser array Download PDFInfo
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- CN102436073A CN102436073A CN2011102955174A CN201110295517A CN102436073A CN 102436073 A CN102436073 A CN 102436073A CN 2011102955174 A CN2011102955174 A CN 2011102955174A CN 201110295517 A CN201110295517 A CN 201110295517A CN 102436073 A CN102436073 A CN 102436073A
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Abstract
The invention discloses a projection lighting optical path based on a semiconductor laser array, which comprises a semiconductor green light laser array module, a semiconductor red light laser array module, a semiconductor blue light laser array module, a light mixing module and a phase rectifying apparatus; the semiconductor green light laser array module, the semiconductor red light laser array module and the semiconductor blue light laser array module are connected with the light mixing module by the optical path; the semiconductor green light laser array module, the semiconductor red light laser array module and the semiconductor blue light laser array module provide light for the light mixing module; the phase rectifying apparatus is arranged on the output optical path of the light mixing module; on one hand, the phase rectifying apparatus is used for rectifying the mixed light of the light mixing module, and on the other hand, and the phase rectifying apparatus is used for further restraining the light speckles.
Description
Technical field
The present invention relates to laser projection and show the field, especially adopt semiconductor laser array, can improve the projection lighting light path of projected image quality as light source.
Background technology
Adopt the traditional projector of high-pressure sodium lamp as light source, light source life is short, and the projected image colour gamut is little, and saturation degree is low, has satisfied not the demands of people to color gradually.Laser display relies on its light source life long, can show limit color, the projected image high definition, and advantages such as high-contrast receive people's attention day by day.
It is little that semiconductor laser is compared other solid state laser volumes, and photoelectric efficiency is high, is the perfect light source of laser display.Ruddiness and blue light laser diode are all very ripe at present, and single tube power has reached a watt rank; Green (light) laser has also had very big progress, and these development are all laid a good foundation for semiconductor laser is used for the laser display field.
Yet, the high coherence's of laser characteristics, a shortcoming that has also caused laser projection to show when laser projection being shown have wide colour gamut advantage: speckle phenomena.Speckle phenomena has had a strong impact on projected image quality, is that laser projection shows one of difficult problem that must solve.
Therefore, how could can keep the wide colour gamut of laser when effectively eliminating speckle, become a key issue the coherence who reduces laser.
This key issue people have also been proposed a lot of methods, and for example patent CN101063519 and patent US298273 have proposed to eliminate through the structure of laser array optical fiber coupling the illuminator of speckle.Utilize multifiber that array laser is coupled in this system, though can suppress speckle to a certain extent, to reach effect preferably, and needed subnumber order is more, can cause the increase of volume and the reduction of the efficiency of light energy utilization.The large-scale application of the laser display that these factors all limit.
Summary of the invention
The technical matters that solves
In view of this, fundamental purpose of the present invention is the volume that reduces the projection lighting light source module, and can when guaranteeing the wide colour gamut of laser display, can effectively reduce the coherence of light source, suppresses speckle, improves display quality.
Technical scheme
The present invention provides a kind of projection lighting light path of based semiconductor laser array in order to achieve the above object, comprising:
Semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module;
One combined optical module;
Wherein this semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module are connected with combined optical module through light path, and this semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module provide light to combined optical module;
One phase-shaped device is positioned on the output light path of combined optical module, and this phase-shaped device is used for the light that combined optical module mixes is carried out shaping on the one hand, on the other hand in the effect of playing further inhibition speckle.
Beneficial effect
1, the projection lighting light path of this based semiconductor laser array provided by the invention; Adopt semiconductor laser array as light source; Reduced the volume of light source module; This in addition structure is the coherence who guarantees to have reduced light source under the constant situation of laser monochromaticity, thus the speckle effect that suppresses to a certain extent.
2, in the projection lighting light path of this based semiconductor laser array provided by the invention, also adopted the holographic diffusion sheet and the phase-shaped device of rotation.Rotate holographic diffusion sheet two effects are arranged: suppress speckle and uniform light spots.The phase place device also plays beam shaping and the effect that reduces speckle simultaneously.This light path effectively suppresses speckle and the homogeneity of improving hot spot aspect above-mentioned three, thereby improves the quality of projected image.
Description of drawings
For further specifying concrete technology contents of the present invention, specify as follows below in conjunction with embodiment and accompanying drawing, wherein:
Fig. 1 is the projection lighting light channel structure figure of based semiconductor laser array provided by the invention;
Fig. 2 is the structural drawing of semiconductor green (light) laser array module in the projection lighting light path of based semiconductor laser array provided by the invention;
Fig. 3 is the structural drawing of semiconductor red laser array module in the projection lighting light path of based semiconductor laser array provided by the invention;
Fig. 4 is the structural drawing of the projection lighting light path neutralizing light module of based semiconductor laser array provided by the invention;
Fig. 5 is that speckle suppresses schematic diagram in the projection lighting light path of based semiconductor laser array provided by the invention.
Embodiment
See also Fig. 1 to Fig. 4; The present invention provides a kind of projection lighting light path of based semiconductor laser array; Comprise: semiconductor green (light) laser array module 1, semiconductor red laser array module 2 and semiconductor blue laser array module 3; One combined optical module, 4, one phase-shaped devices 5.The quantity of said semiconductor green (light) laser array module 1 is 2-5, and the quantity of said semiconductor ruddiness and blue laser array module 2,3 is respectively 2-50.They provide necessary red bluish-green three-color light source for this illuminator.
One of them semiconductor green (light) laser array module 1 comprises: a green (light) laser 11 (see figure 2)s, and it is 4w that this green (light) laser 11 can produce power, wavelength is the green glow of 532nm; One catoptron 12, this catoptron 12 is positioned on the light path of green (light) laser 11, and is miter angle with light path; On the reflected light path of this catoptron 12, be aligned in sequence with a biconcave lens 13, diffusion sheet 14 and plano-convex lens 15.Wherein, biconcave mirror is dispersed green beam.Diffusion sheet 14 one sides be smooth plane on the other hand, and the two sides all are coated with broad-band transparence-increased film for slightly making face.Diffusion sheet 14 can be rotated by driven by motor, can improve the homogeneity of hot spot on the one hand, can reduce the coherence of laser on the other hand, thereby reaches the effect that suppresses speckle.Light is further dispersed through behind the diffusion sheet 14.Plano-convex lens 15 is positioned at the suitable distance of diffusion sheet 15, plays the effect of collimated light beam.
One of them semiconductor red laser array module 2 or semiconductor blue laser array module 3 (see figure 3)s comprise: be arranged in order the semiconductor red laser 21 on light path, a diffusion sheet 23 and the plano-convex lens 24 that a non-spherical lens 22, rotates.Wherein, each red laser 21, power are 1W, and wavelength is 638nm; Non-spherical lens 22 is used for the light of red laser 21 emissions is collimated.The structure and the diffusion sheet 15 of the diffusion sheet 23 of rotation are similar, play the effect of eliminating speckle and uniform light spots.Planoconvex lens 24 is used for diverging light behind the diffusion sheet is collimated.
A combined optical module 4 wherein, said combined optical module 4 is formed (see figure 4) by two dichroic mirrors 31,32 that are miter angle with perpendicular line.Wherein dichroic mirror 31 can reflect the ruddiness of 638nm, the blue light of transmission 445nm; Dichroic mirror 32 can reflect the green glow of 532nm, the ruddiness of transmission 638nm and the blue light of 445nm.
Wherein this semiconductor green (light) laser array module 1, semiconductor red laser array module 2 and semiconductor blue laser array module 3 are connected with combined optical module 4 through light path, and this semiconductor green (light) laser array module 1, semiconductor red laser array module 2 and semiconductor blue laser array module 3 provide light to combined optical module 4;
One phase-shaped device 5 is positioned on the output light path of combined optical module 4, and this phase-shaped device 5 is used for the light that combined optical module 4 mixes is carried out shaping on the one hand, on the other hand in the effect of playing further inhibition speckle.
Light path proposed by the invention is to the elimination effect of speckle, in order to see effect more clearly.Make a concrete analysis of the effect of speckle elimination below.
Fig. 5 has shown three aspects eliminating speckle in the light path.According to the theoretical analysis of speckle, can obtain N width of cloth independence speckle image probability distribution function f (I).
Wherein N is the number of speckle image, I
0Be the mean intensity of speckle, I is a light intensity.The definition of speckle
wherein σ is the standard deviation of light intensity in the piece image.The average intensity of < I>piece image.They have following expression formula:
σ
2=<i
2>-<i>
2According to top various we can therefore can see for
in the hope of the contrast of speckle; The independent speckle image number that in the integral time of human eye, superposes is many more, and it is obvious more that speckle suppresses effect.Based on this theory; In the light path that we designed; The one, the coherence who adopts array laser to weaken light source as light source; Each laser can be regarded as independently; Suppose to have N1; Therefore this part is
the 2nd to the contribution that suppresses speckle, utilizes the scatterer of rotation; In the integral time of human eye, producing independently, the speckle image number is N2; Contribution to suppressing speckle is
the 3rd, utilizes the phase-shaped device, it to contribution is
therefore total speckle the eliminates effect that suppresses speckle for
obviously the projection lighting light path of based semiconductor laser array proposed by the invention can well play the effect that suppresses speckle.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further detailed description, and institute it should be understood that the above is merely embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the projection lighting light path of a based semiconductor laser array comprises:
Semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module;
One combined optical module;
Wherein this semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module are connected with combined optical module through light path, and this semiconductor green (light) laser array module, semiconductor red laser array module and semiconductor blue laser array module provide light to combined optical module;
One phase-shaped device is positioned on the output light path of combined optical module, and this phase-shaped device is used for the light that combined optical module mixes is carried out shaping on the one hand, on the other hand in the effect of playing further inhibition speckle.
2. the projection lighting light path of based semiconductor laser array according to claim 1, the quantity of wherein said semiconductor green (light) laser array module are 2-5.
3. the projection lighting light path of based semiconductor laser array according to claim 1, the quantity of wherein said semiconductor ruddiness and blue laser array module are 2-50.
4. the projection lighting light path of based semiconductor laser array according to claim 2, one of them semiconductor green (light) laser array module comprises:
One green (light) laser;
One catoptron, this catoptron is positioned on the light path of green (light) laser, and is miter angle with light path, is aligned in sequence with a biconcave lens, holographic diffusion sheet and plano-convex lens on the reflected light path of this catoptron.
5. the projection lighting light path of based semiconductor laser array according to claim 3, one of them semiconductor red laser array module or a semiconductor blue laser array module comprise: be arranged in order the semiconductor blue laser on light path, a diffusion sheet and the plano-convex lens that a non-spherical lens, rotates.
6. the projection lighting light path of based semiconductor laser array according to claim 1, wherein combined optical module is made up of two dichroic mirrors that are miter angle with perpendicular line.
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| CN2011102955174A CN102436073A (en) | 2011-09-28 | 2011-09-28 | Projection lighting optical path based on semiconductor laser array |
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| CN2011102955174A CN102436073A (en) | 2011-09-28 | 2011-09-28 | Projection lighting optical path based on semiconductor laser array |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617485A (en) * | 2015-01-27 | 2015-05-13 | 中国科学院理化技术研究所 | Method for reducing laser speckle effect and semiconductor laser source device |
| CN104964246A (en) * | 2015-05-22 | 2015-10-07 | 上海理鑫光学科技有限公司 | Optical lens capable of generating 360-degree annular collimated beams |
| CN105182674A (en) * | 2015-10-28 | 2015-12-23 | 中视迪威激光显示技术有限公司 | Laser light source special for laser projector |
| CN105759444A (en) * | 2016-05-10 | 2016-07-13 | 中国科学技术大学 | Static speckle removal device based on lens array and laser projector |
| CN106020496A (en) * | 2016-07-01 | 2016-10-12 | 成都理想境界科技有限公司 | Near-to-eye display system, virtual reality equipment and augmented reality equipment |
| CN106558830A (en) * | 2015-09-29 | 2017-04-05 | 北京为世联合科技有限公司 | White semiconductor laser array |
| CN106707672A (en) * | 2016-12-30 | 2017-05-24 | 中国华录集团有限公司 | Projector with multi-angle atomization diffusion sheet optical structure |
| CN106873293A (en) * | 2016-12-30 | 2017-06-20 | 中国华录集团有限公司 | A kind of laser projection system for reducing speckle |
| CN107562181A (en) * | 2016-07-01 | 2018-01-09 | 成都理想境界科技有限公司 | Near-eye display system, virtual reality device and augmented reality equipment |
| CN107561697A (en) * | 2016-07-01 | 2018-01-09 | 成都理想境界科技有限公司 | Near-eye display system, virtual reality device and augmented reality equipment |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617485B (en) * | 2015-01-27 | 2017-11-10 | 杭州中科极光科技有限公司 | The method and semiconductor laser source device of weakening laser speckle effect |
| CN104617485A (en) * | 2015-01-27 | 2015-05-13 | 中国科学院理化技术研究所 | Method for reducing laser speckle effect and semiconductor laser source device |
| CN104964246A (en) * | 2015-05-22 | 2015-10-07 | 上海理鑫光学科技有限公司 | Optical lens capable of generating 360-degree annular collimated beams |
| CN106558830A (en) * | 2015-09-29 | 2017-04-05 | 北京为世联合科技有限公司 | White semiconductor laser array |
| CN105182674A (en) * | 2015-10-28 | 2015-12-23 | 中视迪威激光显示技术有限公司 | Laser light source special for laser projector |
| CN105759444A (en) * | 2016-05-10 | 2016-07-13 | 中国科学技术大学 | Static speckle removal device based on lens array and laser projector |
| WO2018001322A1 (en) * | 2016-07-01 | 2018-01-04 | 成都理想境界科技有限公司 | Near-eye display system, virtual-reality device, and augmented-reality device |
| CN106020496A (en) * | 2016-07-01 | 2016-10-12 | 成都理想境界科技有限公司 | Near-to-eye display system, virtual reality equipment and augmented reality equipment |
| CN107562181A (en) * | 2016-07-01 | 2018-01-09 | 成都理想境界科技有限公司 | Near-eye display system, virtual reality device and augmented reality equipment |
| CN107561697A (en) * | 2016-07-01 | 2018-01-09 | 成都理想境界科技有限公司 | Near-eye display system, virtual reality device and augmented reality equipment |
| CN106020496B (en) * | 2016-07-01 | 2019-04-30 | 成都理想境界科技有限公司 | A kind of near-eye display system, virtual reality device and augmented reality equipment |
| CN107561697B (en) * | 2016-07-01 | 2019-04-30 | 成都理想境界科技有限公司 | Near-eye display system, virtual reality device and augmented reality equipment |
| CN107562181B (en) * | 2016-07-01 | 2020-01-31 | 成都理想境界科技有限公司 | Near-to-eye display system, virtual reality equipment and augmented reality equipment |
| CN106873293A (en) * | 2016-12-30 | 2017-06-20 | 中国华录集团有限公司 | A kind of laser projection system for reducing speckle |
| CN106707672A (en) * | 2016-12-30 | 2017-05-24 | 中国华录集团有限公司 | Projector with multi-angle atomization diffusion sheet optical structure |
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Application publication date: 20120502 |