CN105759444B - 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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- CN105759444B CN105759444B CN201610308180.9A CN201610308180A CN105759444B CN 105759444 B CN105759444 B CN 105759444B CN 201610308180 A CN201610308180 A CN 201610308180A CN 105759444 B CN105759444 B CN 105759444B
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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, it is arranged between the laser source of laser-projector and projecting lens, lens array is located at laser source rear, it includes multiple sub-lens of array arrangement, plane where those sub-lens is vertical with optical axis, for dividing the light of laser source injection to generate beamlet；Static phase modulator be located at lens array optical path rear and with lens array location matches, for making beamlet carry mutually independent pattern；Integration lens are located at phase plate array light path rear and the confocal position of lens array, pictcure generator is located at the focal plane of integration lens, the optical path rear of pictcure generator is projecting lens, the sub-light beam convergence for carrying mutually indepedent pattern is superimposed upon the pictcure generator of its focal plane by integration lens, the mutually indepedent pattern that pictcure generator is carried according to beamlet generates the image for carrying mutually indepedent pattern superposition.
Description
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
(1) technical problems to be solved
In view of this, the main purpose of the present invention is to provide a kind of static state based on lens array disappear speckle device and swash
Light projector.
(2) technical solution
Disappear speckle device the present invention provides a kind of static state based on lens array, the laser of laser-projector is set
Between source 1010 and projecting lens 1007, comprising: lens array 1003, static phase modulator, integration lens 1005 and image
Generator 1006；Wherein, the lens array 1003 is located at laser source rear, and it includes multiple sub-lens of array arrangement, uses
In the light that segmentation laser source projects to generate beamlet；The static phase modulator be located at lens array optical path rear and with
Lens array location matches, for making beamlet carry mutually independent pattern；The integration lens 1005 are located at phase plate battle array
Column optical path rear and the confocal position of lens array, described image generator 1006 are located at the focal plane of integration lens, the figure
As the optical path rear of generator is projecting lens 1007, the integration lens 1005 will carry the beamlet of mutually indepedent pattern
Convergence is superimposed upon the pictcure generator 1006 of its focal plane, and described image generator 1006 carries mutually indepedent according to beamlet
Pattern generates the image for carrying mutually indepedent pattern superposition.
Preferably, the static phase modulator is phase chip arrays 1004, and it includes multiple sub- phases of array arrangement
Piece, the plane where a little phase plate are vertical with optical axis.
Preferably, the static phase modulator is spatial light modulator.
Preferably, the lens array 1003 is the N × M rank lens array being made of sub-lens, the phase chip arrays
1004 are made of N × M sub- phase plates, the size and arrangement mode of sub- phase plate and the size and arrangement of lens array sub-lens
Mode matches.
Preferably, the sub- phase plate includes that two kinds of matrix units are arranged according to the row or column vector of hadamard matrix
Pattern, the phase differences of two kinds of matrix units is π, and the pattern of different sub- phase plates is mutually indepedent.
Preferably, the phase of described two matrix units is respectively 0 and π.
Preferably, the lens array 1003 is the N × M rank lens array being made of sub-lens, spatial light modulator electricity
Control is produced mutually independent pattern, pattern size and arrangement mode and is matched with sub-lens size and arrangement mode.
Preferably, the pattern is made of two kinds of matrix units according to the row or column vector arrangement of hadamard matrix, and two kinds
The phase difference of matrix unit is π.
Preferably, the phase of described two matrix units is respectively 0 and π.
The present invention also provides a kind of laser-projectors, comprising: laser source 1010 and projecting lens 1007, and setting exist
Any above-mentioned static state disappears speckle device between laser source 1010 and projecting lens 1007, and laser source 1010 is for generating laser
Beam, projecting lens 1007 are used for image projection in screen 1008.
(3) beneficial effect
Speckle device and laser projection it can be seen from the above technical proposal that the static state of the invention based on lens array disappears
Instrument 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 specific embodiment according to the present invention disappears the structural schematic diagram of speckle device；
Fig. 2 is the lens array schematic diagram of specific embodiment according to the present invention；
Fig. 3 is the phase chip arrays schematic diagram of specific embodiment according to the present invention；
Fig. 4 is the sub- phase plate schematic diagram of specific embodiment according to the present invention；
Fig. 5 is the phase distribution patterns schematic diagram of the sub- phase plate 1 of specific embodiment according to the present 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 laser source rear, multiple sub-lens comprising array arrangement, where those sub-lens
Plane 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 a 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 respectively 0 (4001) or π (4002), wherein
The phase distribution patterns of sub- phase plate 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；Spatial light modulator is by matrix unit 0 and π tune
Mutually independent pattern is produced, which is to arrange according to row (or column) vector of hadamard matrix, and have and hada
The matrix pattern of the identical order of Ma matrix, matrix pattern size are 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 (7)
- A kind of speckle device 1. static state based on lens array disappears, which is characterized in that its laser source that laser-projector is set (1010) between projecting lens (1007), comprising: lens array (1003), static phase modulator (1004), integration lens (1005) and pictcure generator (1006)；Wherein,The lens array (1003) is located at laser source rear, and it includes multiple sub-lens of array arrangement, for dividing laser The light that source is projected is to generate beamlet；The static phase modulator (1004) be located at lens array optical path rear and with lens array location matches, for making son Light beam carries mutually independent pattern；The integration lens (1005) are located at phase plate array light path rear and the confocal position of lens array, and described image occurs Device (1006) is located at the focal plane of integration lens, and the optical path rear of described image generator is projecting lens (1007), the product The pictcure generator (1006) for dividing lens (1005) that the sub-light beam convergence for carrying mutually indepedent pattern is superimposed upon to its focal plane, The mutually indepedent pattern that described image generator (1006) is carried according to beamlet generates and carries mutually indepedent pattern superposition Image；The static phase modulator is phase chip arrays (1004), and it includes multiple sub- phase plates of array arrangement；It is described Lens array (1003) is the lens array being made of sub-lens, the size and arrangement mode and lens array sub-lens of sub- phase plate Size and arrangement mode match；Pattern made of the row or column vector arrangement that the sub- phase plate includes two kinds of matrix units according to hadamard matrix, two kinds The phase difference of matrix unit is π, and the pattern of different sub- phase plates is mutually indepedent；The phase of described two matrix units is respectively 0 And π.
- The speckle device 2. static state as described in claim 1 disappears, which is characterized in that plane and optical axis where a little phase plate Vertically.
- The speckle device 3. static state as described in claim 1 disappears, which is characterized in that the static phase modulator is spatial light tune Device processed.
- The speckle device 4. static state as claimed in claim 3 disappears, which is characterized in that the lens array (1003) is by sub-lens N × M rank lens array of composition, spatial light modulator is automatically controlled to modulate mutually independent pattern, pattern size and arrangement side Formula is matched with sub-lens size and arrangement mode.
- The speckle device 5. static state as claimed in claim 4 disappears, which is characterized in that the pattern is by two kinds of matrix units according to Kazakhstan Row or column vector arrangement up to Ma matrix is constituted, and the phase difference of two kinds of matrix units is π.
- The speckle device 6. static state as claimed in claim 5 disappears, which is characterized in that the phase of described two matrix units is respectively 0 and π.
- 7. a kind of laser-projector characterized by comprising laser source (1010) and projecting lens (1007), and setting exist Static state described in any one of claims 1 to 6 claim between laser source (1010) and projecting lens (1007) dissipates Spot device, laser source (1010) are used for image projection for generating laser beam, projecting lens (1007) in screen (1008).
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| CN201910490233.7A CN110221448A (en) | 2016-05-10 | 2016-05-10 | Static state based on lens array disappears speckle device and laser-projector |
| CN201610308180.9A CN105759444B (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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| US6747781B2 (en) * | 2001-06-25 | 2004-06-08 | Silicon Light Machines, Inc. | Method, apparatus, and diffuser for reducing laser speckle |
| IL159677A0 (en) * | 2001-07-06 | 2004-06-20 | Explay Ltd | An image projecting device and method |
| GB0718706D0 (en) * | 2007-09-25 | 2007-11-07 | Creative Physics Ltd | Method and apparatus for reducing laser speckle |
| WO2012046330A1 (en) * | 2010-10-07 | 2012-04-12 | Ｎｅｃディスプレイソリューションズ株式会社 | Projection display device |
| CN202083837U (en) * | 2010-11-03 | 2011-12-21 | 中航华东光电有限公司 | Laser projection display system |
| CN102436073A (en) * | 2011-09-28 | 2012-05-02 | 中国科学院半导体研究所 | Projection lighting optical path based on semiconductor laser array |
| CN202502302U (en) * | 2011-12-30 | 2012-10-24 | 北京中视中科光电技术有限公司 | Laser display system capable of eliminating speckle |
| CN102495478B (en) * | 2011-12-30 | 2014-08-13 | 中国科学技术大学 | Laser display speckle inhibition system based on polymer dispersed liquid crystal and method thereof |
| CN202583679U (en) * | 2012-05-15 | 2012-12-05 | 中国科学技术大学 | Laser display system based on electro-optical deflection speckle suppression |
| CN203178574U (en) * | 2013-05-06 | 2013-09-04 | 山东中鸿新能源科技有限公司 | Light beam homogenization apparatus for laser night-vision device |
| US20150070659A1 (en) * | 2013-09-10 | 2015-03-12 | Lemoptix Sa | Method for reducing speckles and a light source used in said method |
| CN104950452A (en) * | 2014-03-31 | 2015-09-30 | 山东华光光电子有限公司 | Light spot homogenization apparatus of illumination module group of semiconductor laser |
| CN104375280A (en) * | 2014-11-20 | 2015-02-25 | 西安炬光科技有限公司 | Semiconductor laser unit system eliminating laser speckles |
| CN205643892U (en) * | 2016-05-10 | 2016-10-12 | 中国科学技术大学 | Static dissipation spot device and laser projection appearance based on lens array |
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