CN202075497U - Speckle eliminating device based on Mie scatter and field deformation polymers - Google Patents
Speckle eliminating device based on Mie scatter and field deformation polymers Download PDFInfo
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- CN202075497U CN202075497U CN2011200307613U CN201120030761U CN202075497U CN 202075497 U CN202075497 U CN 202075497U CN 2011200307613 U CN2011200307613 U CN 2011200307613U CN 201120030761 U CN201120030761 U CN 201120030761U CN 202075497 U CN202075497 U CN 202075497U
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- base polymer
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- speckle
- optical reflection
- deformation base
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Abstract
The utility model relates to the technical field of display utilizing coherent light as a light source, in particular to a speckle eliminating device based on Mie scatter and field deformation polymers, which resolves problems that an existing speckle eliminating method is poor in speckle eliminating effect, complex in realized structure, easy to be damaged, high in cost and the like. The speckle eliminating device comprises an optical reflecting cavity with an incident light coupling device and a transmission and emergence surface, inner walls, except the inner wall of the transmission and emergence surface, of the optical reflecting cavity are 'mirror' inner walls, transparent solid substances which are fully filled into the total optical reflecting cavity are arranged in the optical reflecting cavity, medium particles with the linearity capable of leading incident laser to realize Mie scatter are distributed in the transparent solid substances in a scattered manner, the transparent solid substances are the field deformation polymers, and the optical reflecting cavity is provided with an actuating device which is used for generating an outer field needed by the polymers in the cavity. The speckle eliminating device based on Mie scatter and field deformation polymers is reasonable and compact in structure, fine in speckle elimination effect, easy to be realized, low in manufacturing cost, high in laser utilization rate and stable in performance, is safe and reliable and has a dodging function.
Description
Technical field
It is the display technique field of light source that the utility model relates to the coherent light, specifically is a kind ofly to cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, is primarily aimed at the optics speckle phenomena that exists in laser display technology and the optical instrument.
Background technology
When being the light source irradiation screen,, cause human eye to see the image that is covered by speckle, have a strong impact on image displaying quality, hinder the observer and from image, extract useful information because the coherence of laser and screen is coarse with laser.Therefore, how to eliminate speckle is to be the optical instrument field of light source and the research and development focus in the display technique field with laser always.And with regard to present result of study, roughly can be divided into two big classes for eliminating the used method of speckle: one, the temporal coherence by the control LASER Light Source reduces speckle, its principle is to produce the boiling speckle by adjusting optical maser wavelength (perhaps frequency) and multi wave length illuminating source, successfully eliminates hot spot by control Laser Time coherence at present and reaches the practical technical scheme that requires and be superposed to the master with multiple light courcess basically; Two, eliminate speckle by control laser beam spatial coherence, it is the main method of eliminating speckle at present, ultimate principle is to adjust the PHASE DISTRIBUTION of primitive light wave in the laser beam, thereby change the space distribution of speckle, a plurality of speckle images are superimposed in integral time at human eye, obtain the image that a luminous energy is evenly distributed, and then realize eliminating the purpose of speckle.Concrete method has: adopt rotation scatterer, vibration screen, vibration to have Hadamard figure scatterer, dither optical fiber etc.Said method, or will be, even need high frequency or significantly vibration, or want integrated multiple light courcess by mechanical vibration, the implementation structure complexity, fragile, cost is high, main is that speckle is eliminated poor effect.
Technical scheme by mechanical vibration is also arranged not, for example: the patent No. is that 200820122639.7 Chinese patent discloses " a kind of decohering and shimming device based on scattering ", require to use contain diameter must be less than the scattering medium of the particle of lambda1-wavelength 1/10th, to realize that incident laser is formed Rayleigh scattering.Utilize inorganic salts or organic alcohol solution (as NaCl, KCl, KNO in the patent
3Or ZnSO
4Aqueous solution) as scattering medium, existence form based on inorganic salts or organic alcohol solution is hydrated ion or big molecule, little a lot of with respect to optical maser wavelength, can form Rayleigh scattering to incident laser, realize the incident laser beam splitting with this, and in photoconductive tube, conduct, eliminate speckle in the hope of the coherence who reduces incident laser, utilize the mixed light effect of photoconductive tube simultaneously, above-mentioned beam splitting light is carried out homogenize come the shimming eliminating coherence.But test by the described technical method of this application, at room temperature, utilize length to eliminate speckle for 50mm, the photoconductive tube that is full of saturated NaCl aqueous solution, result's speckle contrast is 70%, does not almost play the effect that reduces speckle.
Summary of the invention
The utility model is for problems such as the elimination speckle poor effect that solves existing speckle removing method and exist, implementation structure complexity, fragile, cost height, and a kind of speckle cancellation element that causes the deformation base polymer based on Mie scattering and field is provided.
The utility model is to adopt following technical scheme to realize: the speckle cancellation element that causes the deformation base polymer based on Mie scattering and field, comprise the optical reflection chamber which is provided with incident light coupling device and transmission exit facet, it (is that inwall has the high reflectance characteristic that the inwall of optical reflection chamber except that transmission exit facet inwall is all " minute surface " inwall, energy " total reflection " is incident in the laser beam in the optical reflection chamber), be provided with the transparent solid matter that fills up whole optics reflection cavity in the optical reflection chamber, and be scattered with the insulating particles that its dimension can cause incident laser generation Mie scattering in the transparent solid matter, (this base polymer is under corresponding outfield drives described transparent solid matter for the field causes the deformation base polymer, deformation can take place, described outfield refers generally to electric field and magnetic field), the optical reflection chamber is equipped with in order to produce the actuating device in the required outfield of interpolymer, chamber.
Described to cause the deformation base polymer be the electroluminescent deformation base polymer, and corresponding actuating device is an electric field generation device, and the battery lead plate of electric field generation device is arranged in the optical reflection chamber in pairs or outside the chamber;
Place the battery lead plate in the optical reflection chamber to adopt " minute surface " battery lead plate (be that electrode plate surface has the high reflectance characteristic, energy " total reflection " is incident in the laser beam in the optical reflection chamber), fixedly install along the optical reflection cavity wall;
Described causes the deformation base polymer is the magnetostriction base polymer, and corresponding actuating device is a field generator for magnetic, and the electromagnet of magnetic field generator is arranged at outside the optical reflection chamber;
During application, shown in Fig. 3,4, be incident in the optical reflection chamber by the incident light coupling device of LASER Light Source emission laser beam on the optical reflection chamber, cause the insulating particles effect generation Mie scattering of scattering in the deformation base polymer (as shown in Figure 2 with internal field, optical reflection chamber, when Mie scattering takes place in incident laser 101 irradiation insulating particles 402, scattered light light distribution after incident laser 101 scatterings is in a very wide angular range, mainly concentrate on forward scattering light 104,105,106, generally account for total scattering more than 90%; 102 of rear orientation lights account for very fraction, usually less than 10%; Scattered light 105 light intensity along the incident laser working direction are the strongest, the scattered light 103,107 of vertical direction is the most weak, therefore incident laser is after insulating particles 402 scatterings, be beamed into the scattered light that a plurality of intensity do not wait, the scattering angle of scattered light distributes and enlarges simultaneously), be beamed into the scattered light that a plurality of intensity do not wait, or reflect through the optical reflection cavity wall, or cause the insulating particles effect generation Mie scattering of scattering in the deformation base polymer with the field once more, the scattered light beam splitting is more scattered light, after Mie scattering repeatedly, by the transmission exit facet outgoing in optical reflection chamber; And under the corresponding outfield that actuating device produces drives, field in the optical reflection chamber causes the deformation base polymer continuous deformation can take place, position of insulating particles produces the relative displacement variation in it, and then can change each the corresponding scattered light of the incident laser direction of propagation and path that causes in the deformation base polymer on the scene constantly, PHASE DISTRIBUTION, the scattering angle distribution random variation of the scattered light of final optical reflection chamber exit facet outgoing.And the outgoing scattered light in the different moment has different PHASE DISTRIBUTION, scattering angle distributes, and after projection, can correspondingly produce a speckle image respectively; In human eye integral time (50ms), a plurality of speckle images are superimposed, can obtain the image that a luminous energy is evenly distributed, and then realized eliminating the purpose of speckle phenomena.
Compared with prior art, the utility model is provided with the optical reflection chamber, in the optical reflection chamber, fill the field and cause the deformation base polymer, cause the insulating particles that scatter in the deformation base polymer with the field and cause incident laser generation Mie scattering, carry out the scattering beam splitting, and produce the outfield that Driving Field causes the deformation of deformation base polymer by corresponding actuating device, make the field cause deformation base polymer continuous deformation, cause that the field causes insulating particles generation relative displacement in the deformation base polymer, and then the direction of propagation and the path of randomly changing scattered beam in the optical reflection chamber, make optical reflection chamber exit facet at the scattered light of different time with different PHASE DISTRIBUTION and scattering angle distribution outgoing incident laser; Thereby produce the space distribution of speckle after the change projection, make a plurality of speckle images superimposed in integral time, obtain the image that a luminous energy is evenly distributed, and then effectively eliminate speckle at human eye.And through experimental test, use device described in the utility model after, the speckle contrast of image can be lower than 4%, the speckle contrast of image has been low to moderate 3.16%, speckle is eliminated works very well; And can increase the deformation quantity that the field causes the deformation base polymer by control to actuating device, improve speckle and eliminate effect; The utility model carries out " total reflection " to incident laser in the optical reflection chamber, the overall light loss of energy of incident laser is very little, has guaranteed the high usage of laser, and has realized even light purpose in " total reflection " process; Each ingredient of device described in the utility model is solid-state, does not have problems such as leak of liquid, suspending liquid sedimentation, and stable performance is safe and reliable.In addition, the used optical reflection cavity configuration of the utility model is very common, and the field causes the deformation base polymer and also very easily obtains, and the also very easily making of corresponding actuating device, therefore has the advantage of low cost.
The utility model is rational in infrastructure, compact, and speckle is eliminated effective, realizes that easily cost is low, laser utilization factor height, and stable performance, safe and reliable, and have even light function.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the light intensity angle distribution plan of Mie scattering;
The transmission state synoptic diagram of device inner light beam described in the utility model when Fig. 3 for the electroluminescent deformation base polymer deformation does not take place;
The transmission state synoptic diagram of device inner light beam described in the utility model when Fig. 4 is electroluminescent deformation base polymer generation deformation;
Fig. 5 is the application synoptic diagram of device described in the utility model in the spot scan display system;
Fig. 6 is the application synoptic diagram of device described in the utility model in the full frame display system;
Among the figure: the 101-incident laser; 102,103,104,105,106,107-scattered light;
300-speckle cancellation element; 301-incident light coupling device; 302-optical reflection chamber; 303-transmission exit facet; The 304-entrance pupil; 305,306,307-speckle cancellation element; The 308-battery lead plate;
The transparent solid matter of 401-; The 402-insulating particles;
501,502,503-laser instrument;
601,602,603-signal source;
The 700-lens; The 701-relay lens; 702-photomodulator DLP; The 703-TIR prism; The 704-relay lens; The 705-TIR prism; 706-photomodulator DLP; The 707-relay lens; The 708-level crossing; The 709-TIR prism; 710-photomodulator DLP; The 711-prism; 712-micro scanning mirror;
The 800-screen.
Embodiment
As shown in Figure 1, cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, comprise the optical reflection chamber 302 which is provided with incident light coupling device 301 and transmission exit facet 303, it (is that inwall has the high reflectance characteristic that the inwall of optical reflection chamber 302 except that transmission exit facet 303 inwalls is all " minute surface " inwall, energy " total reflection " is incident in the laser beam in the optical reflection chamber), be provided with the transparent solid matter 401 that fills up whole optics reflection cavity 302 in the optical reflection chamber 302, and be scattered with the insulating particles 402 that its dimension can cause incident laser generation Mie scattering in the transparent solid matter 401, (this base polymer is under corresponding outfield drives described transparent solid matter 401 for the field causes the deformation base polymer, deformation can take place, described outfield refers generally to electric field and magnetic field), optical reflection chamber 302 is equipped with in order to produce the actuating device in the required outfield of interpolymer, chamber.
Described to cause the deformation base polymer be the electroluminescent deformation base polymer, and corresponding actuating device is an electric field generation device, and the battery lead plate 308 of electric field generation device is arranged in the optical reflection chamber 302 in pairs or outside the chamber;
Place the battery lead plate 308 in the optical reflection chamber 302 to adopt " minute surface " battery lead plate (be that electrode plate surface has the high reflectance characteristic, energy " total reflection " is incident in the laser beam in the optical reflection chamber), fixedly install along optical reflection chamber 302 inwalls;
Described causes the deformation base polymer is the magnetostriction base polymer, and corresponding actuating device is a field generator for magnetic, and the electromagnet of magnetic field generator is arranged at outside the optical reflection chamber 302;
During concrete enforcement, described insulating particles 402 can adopt polystyrene microsphere or TiO 2 particles (TiO2); The kind that described field causes the deformation base polymer is a lot, for example: gel electroluminescent deformation base polymer-the be doped with PDMS(polydimethylsiloxane of TiO 2 particles); Magnetostriction base polymer-the be doped with PDMS(polydimethylsiloxane of silicone dioxide magnetic microsphere or polystyrene magnetic microsphere or Fe 3 O 4 magnetic microballoon or di-iron trioxide magnetic microsphere) gel, and when selecting, should be first alternative condition incident laser there is not transmission loss; Described optical reflection chamber 302 multiselects are made of metal, level crossing, transparent plastic or glass processing, and its shape need not special qualification, the general tubular housings that adopt more; The transmission exit facet 303 surperficial multiselects in optical reflection chamber 302 are made of transparent plastic or glass processing, and mostly are rectangle plane or circular flat, and the surface is provided with the anti-reflection film that mates with the incident beam wave band.
Incident light coupling device 301 on the described optical reflection chamber 302 can be realized by following structure: adopt the transmission plane of incidence, and be provided with the anti-reflection film that mates with incident laser 101 wave bands on the surface; Perhaps adopt the entrance pupil structure, and on entrance pupil 304, be equipped with optical coupling element, as: optical lens.
Speckle cancellation element described in the utility model can be applied in the laser projection display technology, for example: as shown in Figure 5, be applied to spot scan projection (Raster-Scanned Displays) system, signal source 601,602,603 is modulated tricolor laser device 501,502,503 output powers respectively according to the information of each pixel on the two dimensional image; Three incident lasers are derived in exit facet after modulating by mirror 504,505,506 coupling incidents speckle cancellation element 300 described in the utility model, and scioptics 700 and micro scanning mirror (Scan Mirror) 701 projects to screen 800.Under the driving of electric signal, micro scanning mirror 701 pursues picture element scan to screen according to two dimensional image.Should be applicable to that the laser-projector of spot scan and laser television show with example.
As shown in Figure 6, be applied to full frame Display projector (Full-Frame Displays) system, tricolor laser device 501,502,503 output firm power laser beams, coupling imports speckle cancellation element 305,306,307 described in the utility model respectively; After modulation, by relay lens 701,704,707, level crossing 708 and TIR prism 703,705,709 converge to photomodulator DLP 702,706,710; Photomodulator DLP 702,706,710 generates monochrome image according to every frame 2 dimension image information modulation; Tristimulus image is warm through prism 711, is projected to screen 800 by lens 700.Should be applicable to that laser-projector and laser television based on optical modulation devices such as DMD, LCOS show with example.
Claims (6)
1. one kind causes the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: comprise the optical reflection chamber (302) which is provided with incident light coupling device (301) and transmission exit facet (303), the inwall of optical reflection chamber (302) except that transmission exit facet (303) inwall is all " minute surface " inwall, be provided with the transparent solid matter (401) that fills up whole optics reflection cavity (302) in the optical reflection chamber (302), and be scattered with the insulating particles (402) that its dimension can cause incident laser generation Mie scattering in the transparent solid matter (401), described transparent solid matter (401) causes the deformation base polymer for the field, and optical reflection chamber (302) are equipped with in order to produce the actuating device in the required outfield of interpolymer, chamber.
2. according to claim 1ly cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: described causes the deformation base polymer is the electroluminescent deformation base polymer, corresponding actuating device is an electric field generation device, and the battery lead plate of electric field generation device (308) is arranged in the optical reflection chamber (302) in pairs or the chamber outside.
3. according to claim 2ly cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: place the battery lead plate (308) in the optical reflection chamber (302) to adopt " minute surface " battery lead plate, fixedly install along optical reflection chamber (302) inwall.
4. according to claim 1ly cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: described causes the deformation base polymer is the magnetostriction base polymer, corresponding actuating device is a field generator for magnetic, and the electromagnet of magnetic field generator is arranged at outside the optical reflection chamber (302).
5. according to claim 1ly cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: described insulating particles (402) adopt polystyrene microsphere or TiO 2 particles.
6. according to claim 1ly cause the speckle cancellation element of deformation base polymer based on Mie scattering and field, it is characterized in that: transmission exit facet (303) surface of optical reflection chamber (302) is provided with the anti-reflection film with incident laser (101) wave band coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200307613U CN202075497U (en) | 2011-01-29 | 2011-01-29 | Speckle eliminating device based on Mie scatter and field deformation polymers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200307613U CN202075497U (en) | 2011-01-29 | 2011-01-29 | Speckle eliminating device based on Mie scatter and field deformation polymers |
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| CN202075497U true CN202075497U (en) | 2011-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073146A (en) * | 2011-01-29 | 2011-05-25 | 中北大学 | Mie scattering and field-induced deformation polymers-based speckle eliminating device |
-
2011
- 2011-01-29 CN CN2011200307613U patent/CN202075497U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073146A (en) * | 2011-01-29 | 2011-05-25 | 中北大学 | Mie scattering and field-induced deformation polymers-based speckle eliminating device |
| CN102073146B (en) * | 2011-01-29 | 2012-07-04 | 中北大学 | Mie scattering and field-induced deformation polymers-based speckle eliminating device |
| WO2012100644A1 (en) * | 2011-01-29 | 2012-08-02 | 中北大学 | Speckle removal device based on mie scattering and polymer of field-induced deformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xia Yun Inventor after: Chen Xuyuan Inventor after: Gao Wenhong Inventor after: Shi Yunbo Inventor after: Zhang Wendong Inventor before: Chen Xuyuan Inventor before: Gao Wenhong Inventor before: Shi Yunbo Inventor before: Zhang Wendong |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CHEN XUYUAN GAO WENHONG SHI YUNBO ZHANG WENDONG TO: XIA YUN CHEN XUYUAN GAO WENHONG SHI YUNBO ZHANG WENDONG |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20120704 |