CN110221448A - Static state based on lens array disappears speckle device and laser-projector - Google Patents
Static state based on lens array disappears speckle device and laser-projector Download PDFInfo
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- CN110221448A CN110221448A CN201910490233.7A CN201910490233A CN110221448A CN 110221448 A CN110221448 A CN 110221448A CN 201910490233 A CN201910490233 A CN 201910490233A CN 110221448 A CN110221448 A CN 110221448A
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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
- G02B27/48—Laser speckle 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
- G03B21/142—Adjusting of projection optics
Abstract
Disappear speckle device the present invention provides a kind of static state based on lens array, comprising: laser source, the laser source are used for shoot laser；Lens array, the lens array are located in the optical path of laser source, and the lens array includes multiple sub-lens of array arrangement, and the lens array is used to receive the light of the laser source injection to generate beamlet；Static phase modulator, the static phase modulator are located in the emergent light optical path of the lens array, and the static phase modulator is used to carry out phase-modulation to the beamlet；And integration lens, the integration lens are located in the optical path of the beamlet through the phase-modulation, the integration lens are for converging beamlet to pictcure generator.All components of this case are static component, and structure is simple, high reliablity.
Description
The application was based on application No. is on May 10th, 2016, application No. is 201610308180.9, entitled " bases
Disappear speckle device and laser-projector in the static state of lens array " divisional application.
Technical field
The present invention relates to technical field of laser display more particularly to a kind of static state based on lens array disappear speckle device and
Laser-projector.
Background technique
It is shown relative to tradition, laser projection show, saturation degree good, colour gamut wide the advantages that high with brightness.But because swashing
The high coherence of radiant can generate speckle phenomena in projection, seriously affect the quality of image.Eliminating speckle, there are many sides
Formula is broadly divided into two kinds of dynamic and static state.Dynamic dissipation spot can bring mechanical oscillation, and the volume of instrument and energy consumption is caused to increase,
For example, by vibration Hadamard (Hadamard) matrix phase plate, so that resolution corresponding to each sensing point of each detector
Point is superimposed several independent patterns with out of phase distribution within the time of integration, achievees the purpose that dissipation spot.It is breathed out by vibration
Many phase distribution patterns independent of each other will be generated up to Ma matrix phase plate.But this method bring mechanical oscillation and
Additional energy loss increases the size and complexity of system, and because the presence of vibration has one within a certain period of time
The phase plate divided can not be utilized, and reduce the utilization rate of phase plate.It is loaded by each sub-lens to liquid lens array
Different voltages realize that the static state of phase-modulation disappears speckled fashion, its shortcoming is that structure is complicated for liquid lens array, manufacture difficulty
Greatly, it is not easy to realize that miniaturization, later maintenance expend greatly, need individually to each sub-lens on-load voltage, driving circuit is complicated.
Therefore, this field needs a kind of simple, without driving device and energy consumption the static mode dissipation spot of structure
Projecting light path, to make up above-mentioned disadvantage.
Summary of the invention
In view of this, disappearing speckle device the purpose of the present invention is to provide a kind of static state based on lens array.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of static state based on lens array is provided
Disappear speckle device, should the speckle device that disappears of static state based on lens array include:
Laser source, the laser source are used for shoot laser；
Lens array, the lens array are located in the optical path of laser source, and the lens array includes the more of array arrangement
A sub-lens, the lens array are used to receive the light of the laser source injection to generate beamlet；
Static phase modulator, the static phase modulator is located in the emergent light optical path of the lens array, described
Static phase modulator is used to carry out phase-modulation to the beamlet；And
Integration lens, the integration lens are located in the optical path of the beamlet through the phase-modulation, the integration lens
For converging beamlet to pictcure generator.
Preferably, the static phase modulator is phase chip arrays, and the phase chip arrays include the multiple and son
Lens phase plate correspondingly.
Preferably, the beamlet optical axis that the sub- phase plate plane is emitted perpendicular to the lens array.
Preferably, the sub- phase plate includes at least two kinds of matrix units arranged according to hadamard matrix, so that more
A sub- phase plate is respectively provided with different phase-modulated informations.
Preferably, the phase of the matrix unit is 0 or π.
Preferably, the static phase modulator is spatial light modulator, and the spatial light modulator automatically controlled can modulate
With multiple sub-lens multiple phase distribution states correspondingly.
Preferably, the automatically controlled multiple phase distribution states modulated of the spatial light modulator separately include different
Phase-modulated information, the phase-modulated information include at least two different phases and arrange according to hadamard matrix.
Preferably, described image generator is set to the focal plane of the integration lens, and described image generator is used for will
Carry multiple beamlet overlapping imagings of out of phase distributed intelligence.
The object of the invention is also to provide a kind of laser-projectors, comprising: above-mentioned static state disappears speckle device.
Implement the static state provided in an embodiment of the present invention based on lens array to disappear speckle device and laser-projector, will have
Below the utility model has the advantages that
(1) it is realized using lens array, integration lens and pictcure generator cooperation phase chip arrays or spatial light modulator
Static dissipation spot, all components are static component, and structure is simple, high reliablity；
(2) it is not necessarily to additional driving part and energy loss, system dimension is reduced, reduces system complexity；
(3) all sub- phase plates of same time phase chip arrays are utilized, and are played a role simultaneously, are improved orthogonal moment
The utilization rate of battle array phase plate.
Detailed description of the invention
Fig. 1 is that the static state of one embodiment of the invention disappears the structural schematic diagram of speckle device；
Fig. 2 is the lens array schematic diagram of one embodiment of the invention；
Fig. 3 is the phase chip arrays schematic diagram of one embodiment of the invention；
Fig. 4 is the sub- phase plate schematic diagram of one embodiment of the invention；
Fig. 5 is the phase distribution patterns schematic diagram of the sub- phase plate 1 of one embodiment of the invention.
[symbol description]
1001- laser；1002- beam expander；1003- lens array；1004- phase chip arrays；1005- integration lens；
1006- pictcure generator；1007- projecting lens；1008- screen；1009- recipient；1010- laser source.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
Disappear speckle device as shown in Figure 1, first embodiment of the invention provides a kind of static state based on lens array, sets
It sets between the laser source 1010 and projecting lens 1007 of laser-projector, for eliminating the speckle of laser-projector, the static state
The speckle device that disappears includes: lens array 1003, phase chip arrays 1004, integration lens 1005 and pictcure generator 1006；Wherein,
Lens array 1003 is located at the rear of laser source 1010, multiple sub-lens comprising array arrangement, these sub-lens
The plane at place is vertical with optical axis, for dividing the light of laser source injection to generate beamlet；
Phase chip arrays 1004 be located at lens array optical path rear and with lens array location matches, include array arrangement
Multiple sub- phase plates, the plane where this little phase plate is vertical with optical axis, for making beamlet carry mutually independent pattern；
Integration lens 1005 are located at phase plate array light path rear and the confocal position of lens array, pictcure generator 1006
Positioned at the focal plane of integration lens, the optical path rear of pictcure generator is projecting lens 1007, and integration lens 1005 will carry
The sub-light beam convergence of mutually independent pattern is superimposed upon the pictcure generator 1006 of its focal plane, and pictcure generator 1006 is according to son
The mutually indepedent pattern that light beam carries generates the image for carrying mutually independent pattern superposition.
Wherein, lens array 1003 is the N × M rank lens array being made of sub-lens, and phase chip arrays 1004 are by N × M
A sub- phase plate composition, the size and arrangement mode of sub- phase plate are matched with the size and arrangement mode of lens array sub-lens,
Described N, M≤8.Sub- phase plate includes pattern made of two kinds of matrix units arrange in the way of orthogonal matrix, two kinds of matrixes
The phase difference of unit is π, and the pattern of different sub- phase plates is mutually indepedent.
Preferably, as shown in Figures 2 and 3, the N and M takes 8, i.e. lens array 1003 is 8 be made of 64 sub- lens
× 8 rank lens arrays, sub-lens 2001-2064 are 32mm*32mm having a size of 4mm*4mm, the size of lens array；Phase plate battle array
Column 1004 are made of 64 sub- phase plates, and the size of sub- phase plate 3001-3064 is identical as the size of sub-lens, and pattern is as schemed
Shown in 4.Each sub- phase plate is made of the matrix unit of 4um*4um according to row (or column) vector arrangement of hadamard matrix, and
Matrix pattern with order identical as hadamard matrix, the phase of matrix unit are 0 (4001) or π (4002), neutron phase
The phase distribution patterns of bit slice 3001 are as shown in Figure 5.
The static state based on lens array of first embodiment of the invention disappears speckle device, and the light beam that laser source 1010 generates enters
It is incident upon lens array 1003, wherein when the output light bore of laser is met the requirements, laser source 1010 can only include laser
1001, otherwise, laser source 1010 may also include beam expander 1002；Light beam is divided into 64 sub-beams through lens array 1003；
Each beamlet passes through phase plate 1004, and each beamlet carries the phase distribution letter of corresponding sub- phase plate pattern
Breath；It is superimposed and is converged near the focal plane of integration lens after the integrated lens 1005 of beamlet, meanwhile, the phase that each beamlet carries
Bit distribution information is also superimposed and converges near the focal plane of integration lens；Pictcure generator on the focal plane of integration lens
1006 generate image, then image is carried by the phase distribution information of each sub- phase plate superposition；Image is projected the throwing of lens 1007
Shadow is on screen 1008；Recipient 1009 (such as human eye) viewing screen 1008, because of the corresponding each resolution of recipient's sensing point
Point includes the superposition of multiple mutually independent orthogonal matrix patterns, therefore achievees the effect that dissipation spot, can theoretically make to dissipate
Spot contrast falls to original 12.5%.
The speckle device it can be seen that static state based on lens array of first embodiment of the invention disappears, using lens array,
Integration lens and pictcure generator cooperation orthogonal matrix phase plate realize static dissipation spot, and all components are static component, knot
Structure is simple, high reliablity；Without additional driving part and energy loss, system dimension is reduced, system complexity is reduced；
All sub- phase plates of same time quadrature matrix phase plate are utilized, and are played a role simultaneously, are improved orthogonal matrix phase
The utilization rate of piece.
Second embodiment of the invention provides another static state based on lens array and disappears speckle device, brief in order to reach
The purpose of explanation, any technical characteristic for making same application describes all and in this, without repeating in above-mentioned first embodiment
Identical narration.
The static state disappear speckle device include: lens array 1003, spatial light modulator (SLM), integration lens 1005 and figure
As generator 1006；Wherein, spatial light modulator be located at lens array optical path rear and with lens array location matches, for making
Beamlet carries mutually independent pattern, and the static dissipation spot apparatus structure schematic diagram of second embodiment can refer to Fig. 1, only need by
Phase chip arrays 1004 replace with spatial light modulator.
Lens array 1003 is the N × M rank lens array being made of sub-lens, and spatial light modulator automatically controlled can modulate phase
Mutual independent pattern, pattern size and arrangement mode are matched with sub-lens size and arrangement mode, and orthogonal matrix pattern is by two kinds
Matrix unit arranges in the way of orthogonal matrix, and the phase difference of two kinds of matrix units is π.
Preferably, the N and M takes 16, i.e. lens array 1003 is 16 × 16 rank lens arrays being made of 256 sub- lens
Column, sub-lens are 16mm*16mm having a size of 1mm*1mm, the size of lens array；The matrix that spatial light modulator is 0 by phase
The matrix unit that unit and phase are π modulates mutually independent pattern, which is the row (or column) according to hadamard matrix
Vector is arranged, and the matrix pattern with order identical as hadamard matrix, and matrix pattern size is 1mm*1mm.
The static state based on lens array of second embodiment of the invention disappears speckle device, and the light beam that laser source generates is incident to
Lens array 1003, light beam are divided into 256 sub-beams through lens array 1003；Each beamlet passes through spatial light modulator,
Each beamlet carries the phase distribution information of corresponding pattern；Convergence is superimposed after the integrated lens 1005 of beamlet
Near the focal plane of integration lens, meanwhile, the phase distribution information that each beamlet carries, which is also superimposed, converges in integration lens
Near focal plane；Pictcure generator 1006 on the focal plane of integration lens generates image, then image is carried by each son
The phase distribution information of phase plate superposition；Image is projected lens 1007 and is projected on screen 1008；1009 film viewing screen of recipient
Curtain 1008, because the corresponding each resolution point of recipient's sensing point includes a superposition for multiple mutually independent orthogonal matrix patterns,
Therefore achieve the effect that dissipation spot, theoretically speckle contrast can be made to fall to original 6.25%.
The speckle device it can be seen that static state based on lens array of second embodiment of the invention disappears, using lens array,
Integration lens and pictcure generator adapted space optical modulator realize static dissipation spot, and all components are static component, structure
Simply, high reliablity；Without additional driving part, system dimension is reduced, reduces system complexity.
Third embodiment of the invention provides a kind of laser-projector, including laser 1001 and projecting lens 1007, with
And the static state of the first or second embodiments between laser 1001 and projecting lens 1007 is set and is disappeared speckle device, laser
1001 for generating laser beam, and projecting lens 1007 is used for image projection in screen 1008.
Wherein, laser 1001 can be single laser, be also possible to laser array.
When laser output light bore is unsatisfactory for requiring, disappearing to be provided between speckle device in laser and static state is expanded
Device 1002 reasonably controls beam size according to demand for expanding light source area.
So far, disappear speckle device to a kind of static state based on lens array of the invention and laser-projector has carried out in detail
Thin description.It should be noted that in attached drawing or specification text, the implementation for not being painted or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and not only limiting
Various specific structures, step and the shape mentioned in embodiment, those of ordinary skill in the art can carry out simply more it
Change or replaces, such as:
(1) other kinds of element also can be used in each optical device, as long as being able to achieve identical function；
(2) it can provide the demonstration of the parameter comprising particular value herein, but these parameters are worth without definite equal to corresponding, and
It is that can be similar to analog value in acceptable error margin or design constraint；
(3) direction term mentioned in embodiment, such as "upper", "lower", "front", "rear", "left", "right" etc. are only ginsengs
The direction for examining attached drawing, the protection scope being not intended to limit the invention；
(4) above-described embodiment can be based on the considerations of design and reliability, and the collocation that is mixed with each other uses or and other embodiments
Mix and match uses, i.e., the technical characteristic in different embodiments can freely form more embodiments.
Speckle device and laser-projector in conclusion the static state of the invention based on lens array disappears, utilize lens array
Column, integration lens and pictcure generator cooperation orthogonal matrix phase plate or spatial light modulator realize static dissipation spot, all portions
Part is static component, and structure is simple, high reliablity；Without additional driving part and energy loss, system dimension is reduced,
Reduce system complexity；All sub- phase plates of same time quadrature matrix phase plate are utilized, and are played a role, are mentioned simultaneously
The high utilization rate of orthogonal matrix phase plate.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (9)
- The speckle device 1. a kind of static state based on lens array disappears characterized by comprisingLaser source, the laser source are used for shoot laser；Lens array, the lens array are located in the optical path of laser source, and the lens array includes multiple sons of array arrangement Lens, the lens array are used to receive the light of the laser source injection to generate beamlet；Static phase modulator, the static phase modulator are located in the emergent light optical path of the lens array, the static state Phase-modulator is used to carry out phase-modulation to the beamlet；AndIntegration lens, the integration lens are located in the optical path of the beamlet through the phase-modulation, and the integration lens are used for Beamlet is converged to pictcure generator.
- The speckle device 2. static state as described in claim 1 disappears, which is characterized in that the static phase modulator is phase plate battle array Column, the phase chip arrays include the multiple and sub-lens phase plate correspondingly.
- The speckle device 3. static state as claimed in claim 2 disappears, which is characterized in that the sub- phase plate plane is perpendicular to described The beamlet optical axis of lens array outgoing.
- The speckle device 4. static state as claimed in claim 2 disappears, which is characterized in that the sub- phase plate include at least two kinds according to The matrix unit of hadamard matrix arrangement, so that multiple sub- phase plates are respectively provided with different phase-modulated informations.
- The speckle device 5. static state as claimed in claim 4 disappears, which is characterized in that the phase of the matrix unit is 0 or π.
- The speckle device 6. static state as described in claim 1 disappears, which is characterized in that the static phase modulator is spatial light tune Device processed, the spatial light modulator automatically controlled can modulate and multiple sub-lens multiple phase distribution states correspondingly.
- The speckle device 7. static state as claimed in claim 6 disappears, which is characterized in that the spatial light modulator is automatically controlled to be modulated Multiple phase distribution states separately include different phase-modulated informations, and the phase-modulated information includes at least two kinds not Same phase is arranged according to hadamard matrix.
- The speckle device 8. static state as described in claim 1 disappears, which is characterized in that described image generator is set to the integral The focal plane of lens, described image generator are used to for the multiple beamlets for carrying out of phase distributed intelligence being overlapped into Picture.
- 9. a kind of laser-projector characterized by comprising static state described in any one of claims 1 to 8 claim disappears Speckle device.
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| CN201610308180.9A CN105759444B (en) | 2016-05-10 | 2016-05-10 | Static state based on lens array disappears speckle device and laser-projector |
| CN201910490233.7A CN110221448A (en) | 2016-05-10 | 2016-05-10 | Static state based on lens array disappears speckle device and laser-projector |
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| CN111323933A (en) * | 2018-12-14 | 2020-06-23 | 青岛海信激光显示股份有限公司 | Speckle eliminating device and method and projection display equipment |
| CN109946916B (en) * | 2019-04-25 | 2020-11-10 | 合肥工业大学 | Projection light field display device and display method based on multilayer transparent scattering screen |
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| CN105759444A (en) | 2016-07-13 |
| CN105759444B (en) | 2019-07-09 |
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