WO2012100644A1 - 基于米氏散射和场致形变类聚合物的散斑消除装置 - Google Patents

基于米氏散射和场致形变类聚合物的散斑消除装置 Download PDF

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Publication number
WO2012100644A1
WO2012100644A1 PCT/CN2012/000043 CN2012000043W WO2012100644A1 WO 2012100644 A1 WO2012100644 A1 WO 2012100644A1 CN 2012000043 W CN2012000043 W CN 2012000043W WO 2012100644 A1 WO2012100644 A1 WO 2012100644A1
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Prior art keywords
field
polymer
induced deformation
mie scattering
speckle
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PCT/CN2012/000043
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English (en)
French (fr)
Inventor
陈旭远
高文宏
石云波
张文栋
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中北大学
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Publication of WO2012100644A1 publication Critical patent/WO2012100644A1/zh

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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
    • 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
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources

Definitions

  • the invention relates to the field of display technology using coherent light as a light source, in particular to a speckle elimination device based on Mie scattering and field-induced deformation polymers, mainly for laser display technology and optical speckle phenomenon existing in optical instruments.
  • the technical solution for successfully eliminating the spot by controlling the laser time coherence to achieve practical requirements is basically based on multi-light source superposition; 2.
  • Eliminating speckle by controlling the spatial coherence of the laser beam is currently eliminated.
  • the main method of speckle the basic principle is to adjust the phase distribution of the elementary light wave in the laser beam, thereby changing the spatial distribution of the speckle, and superimposing the plurality of speckle images in the integration time of the human eye to obtain a uniform distribution of light energy.
  • the image in turn, achieves the purpose of eliminating speckle.
  • the specific methods are: using a rotating scatterer, a vibrating screen, and vibration
  • the patent discloses "a scattering-based dephasing shimming device" that requires the use of a scattering medium having particles having a diameter that must be less than one tenth of the wavelength of the incident light to effect Rayleigh scattering of the incident laser.
  • the patent utilizes an inorganic salt or an aqueous solution of an organic alcohol (such as NaCl, KCK KN0 3 or ZnSO ⁇ J solution) as a scattering medium, and the inorganic salt or organic alcohol aqueous solution is present in the form of a hydrated ion or a macromolecule, which is much smaller than the wavelength of the laser.
  • an organic alcohol such as NaCl, KCK KN0 3 or ZnSO ⁇ J solution
  • the speckle was removed by a light pipe filled with a saturated NaCl aqueous solution at a temperature of 50 mm at room temperature. As a result, as shown in Fig. 1, the speckle contrast was 70%, which hardly played. Reduce the effect of speckle.
  • the invention provides a speckle elimination device based on Mie scattering and field-induced deformation polymer in order to solve the problems of poor speckle removal effect, complicated structure, easy damage and high cost in the existing speckle elimination method. .
  • a speckle elimination device based on Mie scattering and a field-induced deformation polymer, comprising an optical reflection cavity provided with an incident light coupling device and a transmission exit surface, the optical reflection cavity except the transmission
  • the inner wall of the outer surface of the exit surface is a "mirror" inner wall (ie, the inner wall has a high reflectivity characteristic, and can "fully reflect” the laser beam incident on the optical reflection cavity), and the optical reflection cavity is filled with the entire optical reflection cavity.
  • the transparent solid material is dispersed with medium particles whose linearity can cause Mie scattering of the incident laser light
  • the transparent solid material is a field-induced deformation type polymer (the polymer is driven by the corresponding external field, Deformation occurs, the external field generally refers to an electric field and a magnetic field, and the optical reflective cavity is provided with an actuator for generating an external field required for the polymer in the cavity.
  • the field-induced deformation type polymer is an electro-deformation type polymer
  • the corresponding actuating device is an electric field generating device.
  • the electrode plates of the electric field generating device are disposed in pairs in the optical reflection cavity or outside the cavity;
  • the electrode plate placed in the optical reflection cavity adopts a "mirror surface” electrode plate (that is, the surface of the electrode plate has a high reflectivity characteristic, and can "fully reflect” the laser beam incident on the optical reflection cavity), and is fixed along the inner wall of the optical reflection cavity;
  • the field-induced deformation type polymer is a magnetically deformable polymer, the corresponding actuating device is a magnetic field generating device, and the electromagnet of the magnetic field generator is disposed outside the optical reflecting cavity;
  • the laser beam emitted by the laser source is incident on the optical reflection cavity through the incident light coupling device on the optical reflection cavity, and the medium dispersed in the field-induced deformation polymer in the optical reflection cavity.
  • the particle action occurs with Mie scattering (as shown in Fig.
  • the scattered light intensity scattered by the incident laser 101 is distributed over a wide range of angles, mainly focusing on
  • the forward scattered light 104, 105, 106 generally accounts for more than 90% of the total scattering; the backscattered light 102 occupies only a small portion, usually less than 10%; the scattered light 105 along the direction of the incident laser is the strongest, the vertical direction
  • the scattered light 103, 107 is the weakest, so that the incident laser light is scattered by the medium particle 402, and then split into a plurality of scattered light of different intensities, and the scattering angle distribution of the scattered light is expanded), and the beam is split into a plurality of intensities.
  • the present invention provides an optical reflective cavity, and the field-reflecting polymer is filled in the optical reflective cavity, and the dielectric particles dispersed in the field-induced deformation polymer are subjected to Mie scattering from the incident laser. Scattering and splitting, and generating an external field for driving the deformation of the deformed polymer through the corresponding actuating device, so that the field-induced deformation polymer is continuously deformed, causing relative displacement of the dielectric particles in the field-induced deformation polymer, and then randomly changing the scattering.
  • the speckle contrast of the image can be less than 4%, as shown in FIG.
  • the speckle contrast of the image is as low as 3.16%, and the speckle elimination effect is excellent;
  • the shape variable of the field-induced deformation polymer is increased by controlling the actuation device to improve the speckle elimination effect;
  • the present invention performs "total reflection" on the incident laser in the optical reflection cavity, and the total light energy of the incident laser The loss is very small, the high utilization rate of the laser is ensured, and the uniformity is achieved in the process of "total reflection";
  • the components of the device of the invention are all solid, and there is no problem of liquid leakage, sedimentation and the like. Stable performance, safe and reliable.
  • the optical reflection cavity structure used in the present invention is extremely common, and the field-induced deformation polymer is also very easy to obtain, and the corresponding actuator device is also easy to manufacture, so that it has the advantage of low cost.
  • the invention has reasonable and compact structure, good speckle elimination effect, easy realization, low cost, high laser utilization rate, stable performance, safety and reliability, and uniform light function.
  • Figure 1 is a graph showing test results obtained by eliminating speckle using a prior art
  • Figure 2 is a schematic view of the structure of the present invention
  • Figure 3 is a diagram showing the angular distribution of light intensity of Mie scattering
  • Figure 4 is a schematic view showing the state of light transmission in the device of the present invention when the electromorphic polymer is not deformed;
  • Figure 5 is a schematic view showing the state of light transmission in the device of the present invention when the electromorphic polymer is deformed
  • Figure 6 is a graph showing test results obtained by using the apparatus of the present invention to eliminate speckle
  • FIG. 7 is a schematic diagram of application of the device of the present invention in a point scan display system
  • FIG. 8 is a schematic diagram of application of the device of the present invention in a full frame display system
  • 300-speckle elimination device 301-incident light coupling device; 302-optical reflection cavity; 303-transmission exit face; 304-incident light hole; 305, 306, 307-speckle elimination device; 308-electrode plate;
  • a speckle reduction device based on Mie scattering and a field-induced deformation polymer includes an optical reflection cavity 302 on which an incident light coupling device 301 and a transmission exit surface 303 are disposed, and an optical reflection cavity 302.
  • the inner wall except the inner wall of the transmission exit surface 303 is a "mirror surface” inner wall (ie, the inner wall has a high reflectivity characteristic, and can "fully reflect” the laser beam incident on the optical reflection cavity), and the optical reflection cavity 302 is filled.
  • the transparent solid substance 401 of the entire optical reflection cavity 302, and the transparent solid substance 401 is dispersed with a medium particle 402 whose linearity can cause Mie scattering of the incident laser light, and the transparent solid substance 401 is a field-forming deformation type polymer (the The polymer-like polymer is deformed by a corresponding external field, generally referred to as an electric field and a magnetic field.
  • the optical reflective cavity 302 is provided with an actuator for generating an external field required for the polymer in the cavity.
  • the field-forming deformation polymer is an electro-deformation polymer
  • the corresponding actuating device is an electric field generating device
  • the electrode plates 308 of the electric field generating device are disposed in pairs or outside the cavity in the optical reflecting cavity 302;
  • the electrode plate 308 disposed in the optical reflection cavity 302 adopts a "mirror surface” electrode plate (that is, the surface of the electrode plate has a high reflectivity characteristic, and can "fully reflect” the laser beam incident on the optical reflection cavity) along the inner wall of the optical reflection cavity 302.
  • the field-induced deformation type polymer is a magnetically deformable polymer, the corresponding actuating device is a magnetic field generating device, and the electromagnet of the magnetic field generator is disposed outside the optical reflecting cavity 302;
  • the medium particles 402 may be polystyrene microspheres or titanium dioxide particles (Ti02); the field-forming deformation polymer has many types, for example: an electro-deformation polymer-doped with titanium dioxide particles.
  • PDMS polydimethylsiloxane
  • PDMS polydimethylsiloxane
  • the optical reflection cavity 302 is mostly made of metal, plane mirror, transparent plastic or glass, and its shape does not need special Generally, the tubular cavity is generally used
  • the surface of the transmission exit surface 303 of the optical reflection cavity 302 is mostly made of transparent plastic or glass, and is mostly a rectangular plane or a circular plane, and the surface is provided with an anti-reflection matching
  • the incident light coupling device 301 on the optical reflective cavity 302 can be realized by adopting a transmission incident surface and having an antireflection film matched with the incident laser 101 band on the surface; or adopting an incident optical hole structure and being incident
  • the optical aperture 304 is provided with an optical coupling element such as an optical lens.
  • the speckle elimination device of the present invention can be applied to a laser projection display technology, for example, as shown in FIG. 7, applied to a Raster-Scanned Displays system, and the signal sources 601, 602, 603 are based on a two-dimensional image.
  • the information of each pixel respectively modulates the output power of the three primary color lasers 501, 502, 503; the three incident lasers are coupled to the speckle elimination device 300 of the present invention through the mirrors 504, 505, 506, modulated, and then exported through the exit surface.
  • a lens 700 and a Scan Mirror 701 are projected onto the screen 800.
  • the micro-scanning mirror 701 scans the screen on a pixel-by-pixel basis from the two-dimensional image.
  • This application example is suitable for point-scan laser projectors and laser TV displays.
  • three primary color lasers 501, 502, 503 output constant power laser beams, which are respectively coupled and introduced into the speckle elimination device 305, 306, 307 of the present invention.
  • the relay lenses 701, 704, 707, the plane mirror 708 and the TIR prisms 703, 705, 709 converge to the light modulators DLP 702, 706, 710; the light modulators DLP 702, 706, 710 according to each frame 2
  • the dimensional image information is modulated to produce a monochrome image; the three primary color images are blended by prism 711 and projected by lens 700 onto screen 800.
  • This application example is suitable for laser projectors and laser TV displays based on optical modulators such as DMD and LCOS.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Description

基于米氏散射及场致形变类聚合物的散斑消除装置 技术领域
本发明涉及以相干光为光源的显示技术领域，具体是一种基于米氏散射及 场致形变类聚合物的散斑消除装置，主要针对激光显示技术及光学仪器中存在 的光学散斑现象。
背景技术
以激光为光源照射屏幕时， 由于激光的相干性及屏幕的粗糙， 导致人眼看 到被散斑覆盖的图像， 严重影响图像显示质量， 阻碍观察者从图像中提取有用 信息。 因此， 如何消除散斑一直是以激光为光源的光学仪器领域和显示技术领 域中的研发热点。而就目前的研究结果来看， 为消除散斑所用的方法大致可以 分为两大类： 一、通过控制激光光源的时间相干性来降低散斑， 其原理是通过 调整激光波长 (或者频率)及多波长光源产生沸腾散斑， 目前通过控制激光时间 相干性成功消除光斑达到实用要求的技术方案基本上以多光源叠加为主； 二、 通过控制激光光束空间相干性消除散斑， 是目前消除散斑的主要方法， 基本原 理是调整激光光束中基元光波的相位分布， 从而改变散斑的空间分布， 将多个 散斑图像在人眼积分时间内相叠加， 得到一个光能分布均匀的图像， 进而实现 消除散斑的目的。 具体的方法有： 采用旋转散射体、 振动屏幕、 振动具有
Hadamard 图形散射体、 高频振动光纤等。 上述方法， 或要借助机械振动， 甚 至需要高频或大幅振动， 或要集成多光源， 实现结构复杂、 易损坏、 成本高， 更主要的是散斑消除效果不佳。
也有未借助机械振动的技术方案，例如：专利号为 200820122639.7的中国 专利公开了"一种基于散射的消相干匀场装置"， 要求使用含有直径必须小于入 射光波长十分之一的颗粒的散射介质， 以实现对入射激光形成瑞利散射。专利 中利用无机盐或有机醇水溶液 (如 NaCl、 KCK KN03或 ZnSO^J溶液)作为散 射介质， 基于无机盐或有机醇水溶液的存在形式是水合离子或大分子， 相对于 激光波长小很多， 会对入射激光形成瑞利散射， 以此实现入射激光分束， 并在 光导管内传导， 以期降低入射激光的相干性来消除散斑， 同时利用光导管的混 光作用， 将上述分束光进行匀化来匀场消相干。但按该申请所述技术方法进行 试验， 在室温下， 利用长度为 50mm、 充满饱和 NaCl水溶液的光导管消除散 斑， 结果如图 1所示， 其散斑对比度为 70%， 几乎没有起到降低散斑的作用。
发明内容
本发明为了解决现有散斑消除方法存在的消除散斑效果不佳、实现结构复 杂、 易损坏、 成本高等问题， 提供了一种基于米氏散射及场致形变类聚合物的 散斑消除装置。
本发明是采用如下技术方案实现的：基于米氏散射及场致形变类聚合物的 散斑消除装置， 包括其上设有入射光耦合装置和透射出射面的光学反射腔， 光 学反射腔除透射出射面内壁之外的内壁皆为"镜面"内壁（即内壁具有高反射率 特性， 能"全反射"入射于光学反射腔内的激光光束） ， 光学反射腔内设有填满 整个光学反射腔的透明固态物质，且透明固态物质内散布有其线度能引起入射 激光发生米氏散射的介质粒子， 所述透明固态物质为场致形变类聚合物（该类 聚合物在相应外场驱动下， 会发生形变， 所述外场一般指电场和磁场） ， 光学 反射腔配设有用以产生腔内聚合物所需外场的致动装置。
所述场致形变类聚合物为电致形变类聚合物，相应致动装置为电场发生装 置， 且电场发生装置的电极板成对设置于光学反射腔内或腔外；
置于光学反射腔内的电极板采用"镜面"电极板（即电极板表面具有高反射 率特性， 能"全反射"入射于光学反射腔内的激光光束） ， 沿光学反射腔内壁固 定设置；
所述场致形变类聚合物为磁致形变类聚合物，相应致动装置为磁场发生装 置， 且磁场发生器的电磁铁设置于光学反射腔外；
应用时， 如图 4、 5所示， 由激光光源发射的激光光束经光学反射腔上的入 射光耦合装置入射于光学反射腔内，与光学反射腔内场致形变类聚合物中散布 的介质粒子作用发生米氏散射 （如图 3所示， 当入射激光 101照射介质粒子 402 发生米氏散射时， 入射激光 101散射后的散射光光强分布于一个很宽的角度范 围内， 主要集中于前向散射光 104、 105、 106， 一般占总散射 90%以上； 后向 散射光 102只占很小部分， 通常小于 10%; 沿入射激光前进方向的散射光 105光 强最强， 垂直方向的散射光 103、 107最弱， 因此入射激光经介质粒子 402散射 后， 分束成多个强度不等的散射光， 同时散射光的散射角分布扩大） ， 分束成 多个强度不等的散射光， 或经光学反射腔内壁反射， 或再次与场致形变类聚合 物中散布的介质粒子作用发生米氏散射， 散射光分束为更多的散射光， 经多次 米氏散射后， 由光学反射腔的透射出射面出射； 而在致动装置产生的相应外场 驱动下， 光学反射腔内的场致形变类聚合物会发生连续形变， 其内介质粒子的 位置产生相对位移变化，进而会改变各时刻入射激光对应散射光在场致形变类 聚合物中的传播方向和路径， 最终光学反射腔出射面出射的散射光的相位分 布、 散射角分布随机变化。 而不同时刻的出射散射光具有不同的相位分布、 散 射角分布，经投影后，分别会对应产生一个散斑图像；在人眼积分时间（50ms) 内， 多个散斑图像相叠加， 会得到一个光能分布均匀的图像， 进而实现了消除 散斑现象的目的。
与现有技术相比， 本发明设置光学反射腔， 在光学反射腔内填充场致形变 类聚合物， 以场致形变类聚合物中散布的介质粒子弓 I起入射激光发生米氏散 射， 进行散射分束， 并通过相应致动装置产生驱动场致形变类聚合物形变的外 场， 使场致形变类聚合物连续形变， 引起场致形变类聚合物内介质粒子产生相 对位移， 进而随机改变散射光束在光学反射腔中的传播方向和路径， 使得光学 反射腔出射面在不同时间以不同的相位分布和散射角分布出射入射激光的散 射光； 从而改变投影后产生散斑的空间分布， 使多个散斑图像在人眼积分时间 内相叠加，得到一个光能分布均匀的图像，进而有效消除散斑。且经试验测试， 应用本发明所述装置后， 图像的散斑对比度可低于 4%， 如图 6所示， 图像的散 斑对比度已低至 3.16%， 散斑消除效果极好； 并可以通过对致动装置的控制， 来增大场致形变类聚合物的形变量， 来提高散斑消除效果； 本发明于光学反射 腔中对入射激光进行 "全反射"， 入射激光的总体光能损失甚微， 保证了激光的 高利用率， 并在"全反射 "过程中实现了匀光目的； 本发明所述装置的各组成部 分均为固态， 不存在液体泄漏、 悬浮液沉降等问题， 性能稳定， 安全可靠。 此 外， 本发明所用光学反射腔结构极为普通， 场致形变类聚合物也极易获得， 且 对应致动装置也极易制作， 因此具有低造价的优势。
本发明结构合理、 紧凑， 散斑消除效果好， 易实现， 造价低， 激光利用率 高， 性能稳定， 安全可靠， 并具有匀光功能。
附图说明
图 1为利用一现有技术消除散斑获得的测试结果图； 图 2为本发明的结构示意图；
图 3为米氏散射的光强角分布图；
图 4为电致形变类聚合物未发生形变时本发明所述装置内光束的传输状态 示意图；
图 5为电致形变类聚合物发生形变时本发明所述装置内光束的传输状态示 意图；
图 6为利用本发明所述装置消除散斑获得的测试结果图；
图 7为本发明所述装置在点扫描显示系统中的应用示意图；
图 8为本发明所述装置在全帧显示系统中的应用示意图；
图中： 101-入射激光； 102、 103、 104、 105、 106、 107-散射光;
300-散斑消除装置； 301-入射光耦合装置； 302-光学反射腔； 303-透射出 射面； 304-入射光孔； 305、 306、 307-散斑消除装置； 308-电极板；
401-透明固态物质； 402-介质粒子；
501、 502、 503-激光器；
601、 602、 603-信号源;
700-透镜； 701-中继透镜； 702-光调制器 DLP; 703-TIR棱镜； 704-中继透 镜； 705-TIR棱镜； 706-光调制器 DLP; 707-中继透镜； 708-平面镜； 709-TIR 棱镜； 710-光调制器 DLP; 711-棱镜； 712-微扫描镜；
800-屏幕。
具体实施方式
如图 2所示， 基于米氏散射及场致形变类聚合物的散斑消除装置， 包括其 上设有入射光耦合装置 301和透射出射面 303的光学反射腔 302，光学反射腔 302 除透射出射面 303内壁之外的内壁皆为"镜面"内壁（即内壁具有高反射率特性， 能"全反射"入射于光学反射腔内的激光光束） ， 光学反射腔 302内设有填满整 个光学反射腔 302的透明固态物质 401， 且透明固态物质 401内散布有其线度能 引起入射激光发生米氏散射的介质粒子 402,所述透明固态物质 401为场致形变 类聚合物（该类聚合物在相应外场驱动下， 会发生形变， 所述外场一般指电场 和磁场） ， 光学反射腔 302配设有用以产生腔内聚合物所需外场的致动装置。
所述场致形变类聚合物为电致形变类聚合物，相应致动装置为电场发生装 置， 且电场发生装置的电极板 308成对设置于光学反射腔 302内或腔外；
置于光学反射腔 302内的电极板 308采用"镜面"电极板（即电极板表面具有 高反射率特性， 能"全反射"入射于光学反射腔内的激光光束） ， 沿光学反射腔 302内壁固定设置；
所述场致形变类聚合物为磁致形变类聚合物，相应致动装置为磁场发生装 置， 且磁场发生器的电磁铁设置于光学反射腔 302外；
具体实施时， 所述介质粒子 402可以采用聚苯乙烯微球或者二氧化钛粒子 (Ti02) ； 所述场致形变类聚合物的种类很多， 例如： 电致形变类聚合物-掺 杂有二氧化钛粒子的 PDMS (polydimethylsiloxane)凝胶； 磁致形变类聚合物- 掺杂有二氧化硅磁性微球、或者聚苯乙烯磁性微球、或者四氧化三铁磁性微球、 或者三氧化二铁磁性微球的 PDMS (polydimethylsiloxane)凝胶， 而在选择时， 应以对入射激光无透射损失为第一选择条件；所述光学反射腔 302多选用金属、 平面镜、 透明塑料或玻璃加工制作， 且其形状无需特别限定， 一般多采用管状 腔体； 光学反射腔 302的透射出射面 303表面多选用透明塑料或玻璃加工制作， 且多为矩形平面或圆形平面， 且表面设有与入射光束波段匹配的增透膜。 所述光学反射腔 302上的入射光耦合装置 301可以按如下结构实现：采用透 射入射面， 并在表面设有与入射激光 101波段匹配的增透膜； 或者采用入射光 孔结构， 并在入射光孔 304上配设有光学耦合元件， 如： 光学透镜。
本发明所述散斑消除装置能应用于激光投影显示技术中， 例如： 如图 7所 示， 应用于点扫描投影 (Raster-Scanned Displays)系统， 信号源 601、 602、 603 根据二维图像上每个像素的信息分别调制三基色激光器 501、 502、 503输出功 率； 三个入射激光通过镜子 504、 505、 506耦合入射本发明所述散斑消除装置 300,经调制后于出射面导出， 通过透镜 700和微扫描镜 (Scan Mirror)701投影到 屏幕 800。在电信号的驱动下，微扫描镜 701根据二维图像逐像素扫描到屏幕上。 本应用实例适用于点扫描的激光投影仪和激光电视显示。
如图 8所示， 应用于全帧显示投影 (Full-Frame Displays)系统， 三基色激光 器 501、 502、 503输出恒定功率激光光束， 分别耦合导入本发明所述散斑消除 装置 305、 306、 307； 经调制后， 由中继透镜 701、 704、 707, 平面镜 708及 TIR 棱镜 703、 705、 709汇聚到光调制器 DLP 702、 706、 710； 光调制器 DLP 702、 706、 710根据每帧 2维图像信息调制生成单色图像；三基色图像经棱镜 711融和， 由透镜 700投影至屏幕 800。 本应用实例适用于基于 DMD、 LCOS等光调制器 件的激光投影仪和激光电视显示。

Claims

权利要求书
1、一种基于米氏散射及场致形变类聚合物的散斑消除装置， 其特征在于: 包括其上设有入射光耦合装置（301 )和透射出射面（303 )的光学反射腔（302)， 光学反射腔 （302) 除透射出射面 （303 ) 内壁之外的内壁皆为"镜面"内壁， 光 学反射腔（302) 内设有填满整个光学反射腔 （302) 的透明固态物质（401 ) ， 且透明固态物质 （401 ) 内散布有其线度能引起入射激光发生米氏散射的介质 粒子（402)，所述透明固态物质（401 )为场致形变类聚合物，光学反射腔（302) 配设有用以产生腔内聚合物所需外场的致动装置。
2、根据权利要求 1所述的基于米氏散射及场致形变类聚合物的散斑消除装 置， 其特征在于： 所述场致形变类聚合物为电致形变类聚合物， 相应致动装置 为电场发生装置，且电场发生装置的电极板 (308 )成对设置于光学反射腔 (302) 内或腔外。
3、根据权利要求 2所述的基于米氏散射及场致形变类聚合物的散斑消除装 置， 其特征在于： 置于光学反射腔 （302) 内的电极板 （308)采用"镜面"电极 板， 沿光学反射腔 （302) 内壁固定设置。
4、根据权利要求 1所述的基于米氏散射及场致形变类聚合物的散斑消除装 置， 其特征在于： 所述场致形变类聚合物为磁致形变类聚合物， 相应致动装置 为磁场发生装置， 且磁场发生器的电磁铁设置于光学反射腔 （302) 夕卜。
5、根据权利要求 1所述的基于米氏散射及场致形变类聚合物的散斑消除装 置， 其特征在于： 所述介质粒子（402)采用聚苯乙烯微球或者二氧化钛粒子。
6、根据权利要求 1所述的基于米氏散射及外场感应型形变类聚合物的散斑 消除装置， 其特征在于： 光学反射腔（302) 的透射出射面 （303 )表面设有与 入射激光 （101 ) 波段匹配的增透膜。
7、根据权利要求 2所述的基于米氏散射及场致形变类聚合物的散斑消除装 置，其特征在于：所述电致形变类聚合物为掺杂有二氧化钛粒子的 PDMS凝胶。
8、根据权利要求 4所述的基于米氏散射及场致形变类聚合物的散斑消除装 置， 其特征在于： 所述磁致形变类聚合物为掺杂有二氧化硅磁性微球、 或者聚 苯乙烯磁性微球、或者四氧化三铁磁性微球、或者三氧化二铁磁性微球的 PDMS 凝胶。
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Publication number Priority date Publication date Assignee Title
CN102073146B (zh) * 2011-01-29 2012-07-04 中北大学 基于米氏散射及场致形变类聚合物的散斑消除装置
CN106908960A (zh) * 2017-03-22 2017-06-30 许江珂 消除激光画面散斑的多孔砂芯和激光液晶显示器
CN111323933A (zh) * 2018-12-14 2020-06-23 青岛海信激光显示股份有限公司 消散斑装置、方法和投影显示设备
CN111323932B (zh) * 2018-12-14 2022-09-16 青岛海信激光显示股份有限公司 消散斑装置和投影显示设备
CN114740683B (zh) * 2022-03-30 2024-01-12 中国计量大学 一种抑制激光散斑的投影屏幕

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001100316A (ja) * 1999-09-28 2001-04-13 Mitsubishi Rayon Co Ltd 画像投影用スクリーン
WO2007072334A1 (en) * 2005-12-19 2007-06-28 Koninklijke Philips Electronics, N.V. Rod integrator that reduces speckle in a laser-based projector
JP2008191512A (ja) * 2007-02-06 2008-08-21 Brother Ind Ltd 光散乱素子、光散乱装置、照明装置及び網膜走査型画像表示装置
CN101529288A (zh) * 2005-09-21 2009-09-09 纳伊夫·M·阿布-阿吉尔 减小激光散斑的方法和设备
CN101685181A (zh) * 2008-09-22 2010-03-31 北京中视中科光电技术有限公司 一种基于散射的消相干匀场装置
CN102073146A (zh) * 2011-01-29 2011-05-25 中北大学 基于米氏散射及场致形变类聚合物的散斑消除装置
CN202075497U (zh) * 2011-01-29 2011-12-14 中北大学 基于米氏散射及场致形变类聚合物的散斑消除装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140220A (en) * 1985-12-02 1992-08-18 Yumi Sakai Light diffusion type light emitting diode
US8415695B2 (en) * 2007-10-24 2013-04-09 Switch Bulb Company, Inc. Diffuser for LED light sources
CN201285473Y (zh) * 2008-09-22 2009-08-05 北京中视中科光电技术有限公司 一种基于散射的消相干匀场装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001100316A (ja) * 1999-09-28 2001-04-13 Mitsubishi Rayon Co Ltd 画像投影用スクリーン
CN101529288A (zh) * 2005-09-21 2009-09-09 纳伊夫·M·阿布-阿吉尔 减小激光散斑的方法和设备
WO2007072334A1 (en) * 2005-12-19 2007-06-28 Koninklijke Philips Electronics, N.V. Rod integrator that reduces speckle in a laser-based projector
JP2008191512A (ja) * 2007-02-06 2008-08-21 Brother Ind Ltd 光散乱素子、光散乱装置、照明装置及び網膜走査型画像表示装置
CN101685181A (zh) * 2008-09-22 2010-03-31 北京中视中科光电技术有限公司 一种基于散射的消相干匀场装置
CN102073146A (zh) * 2011-01-29 2011-05-25 中北大学 基于米氏散射及场致形变类聚合物的散斑消除装置
CN202075497U (zh) * 2011-01-29 2011-12-14 中北大学 基于米氏散射及场致形变类聚合物的散斑消除装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FALKO RIECHERT ET AL.: "Laser speckle reduction via colloidal-dispersion-filled projection screens", APPLIED OPTICS, vol. 48, no. 19, 1 July 2009 (2009-07-01), pages 3742 - 3748, XP001524290, DOI: doi:10.1364/AO.48.003742 *
YOUNG L. KIM ET AL.: "Origin of low-coherence enhanced backscattering", OPTICS LETTERS, vol. 31, no. 10, 15 May 2006 (2006-05-15), pages 1459 - 1461, XP001242789, DOI: doi:10.1364/OL.31.001459 *

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