公开(公告)号：WO1996032658A1

公开(公告)日：1996-10-17

申请号：PCT/US1996005063

申请日：1996-04-12

Applicant: ACCUWAVE CORPORATION

Inventor： ACCUWAVE CORPORATION ,  RAKULJIC, George, Anthony ,  LEYVA, Victor ,  SAYANO, Koichi ,  O'CONNOR, Arthur, Bruce ,  TYLER, Charles, E. ,  MAO, Xiaoping ,  MILLER, Harold, Everett, Jr. ,  YARIV, Amnon

IPC: G02B05/32

CPC classification number: G02B6/4215 ,  G02B5/1857 ,  G02B5/203 ,  G02B5/32 ,  G02B6/12007 ,  G02B6/2706 ,  G02B6/29308 ,  G02B6/2931 ,  G02B6/29311 ,  G02B6/29314 ,  G02B6/29395 ,  G03H1/02 ,  G03H1/0248 ,  G03H1/28 ,  G03H2001/026 ,  G03H2001/0268 ,  G03H2001/0439 ,  G06K9/76 ,  G11B7/0065 ,  G11C13/044 ,  H01S3/08009 ,  H01S3/109 ,  H01S3/16

Abstract: Substantial improvements in photorefractive device lifetimes are provided by control of electron migration which results in the decay of gratings in photorefractive materials due to diffusion and other effects. A new class of photorefractive devices (16) using compensating electronic and ionic gratings having relatively low efficiency but nonetheless usable gratings is provided by arranging the gratings to be reflective in a wavelength band outside the photo-excitation band of the photorefractive material, as by using an infrared operating wavelength. Longer lifetimes in high efficiency gratings are achieved by constant or periodic illumination of photorefractive materials (60, 98, 110, 118) to assure uniform charge distribution of electrons and maintenance of the ionic backbone grating.

Abstract translation: 通过控制电子迁移来提供光折射器件寿命的实质性改进，这导致光折射材料中的光栅由于扩散和其他影响而衰减。 使用具有相对低效率但仍然可用的光栅的补偿电子和离子光栅的新类型的光折射装置（16）通过将光栅布置成在光折射材料的光激发带外部的波长带内被反射的方式来提供，如通过使用 红外线工作波长。 通过光折射材料（60,98,110,118）的恒定或周期性照明来实现高效光栅的寿命更长，以确保电子的均匀电荷分布和离子主干光栅的维持。

公开(公告)号：WO1994019712A1

公开(公告)日：1994-09-01

申请号：PCT/US1994001763

申请日：1994-02-23

Applicant: YEDA RESEARCH & DEVELOPMENT CO., LTD. ,  AMITAI, Yaakov ,  FRIESEM, Asher, Albert ,  REINHORN, Silviu ,  SHARIV, Isaac

Inventor： YEDA RESEARCH & DEVELOPMENT CO., LTD.

IPC: G02B05/32

CPC classification number: G02B6/29323 ,  G02B5/188 ,  G02B5/32 ,  G02B6/0016 ,  G02B6/0038 ,  G02B6/12007 ,  G02B6/124 ,  G02B6/2848 ,  G02B6/29325 ,  G02B6/29328 ,  G02B6/29329 ,  G02B6/29373 ,  G02B6/2938 ,  G02B6/34 ,  G02B6/43 ,  G03H1/0005 ,  G03H1/0408 ,  G03H1/22 ,  G03H2001/0439 ,  G03H2227/05

Abstract: A holographic optical device (2) includes a light-transmissive substrate (2a), a first holographic optical element (Hs), and a second holographic optical element (Hr) that is laterally disposed on the substrate from the first holographic optical element. At least one of the holographic optical elements is a complex diffraction grating that can handle a multiplicity of plane and/or spherical waves arriving from a range of angles, and having a range of wavelengths. Applications for the device include a wavelength division multiplexer/demultiplexer, an image reconstructor, a beam expander/compressor, and a visor/head-up display.

Abstract translation: 全息光学装置（2）包括透光性基板（2a），第一全息光学元件（Hs）和从第一全息光学元件横向设置在基板上的第二全息光学元件（Hr）。 全息光学元件中的至少一个是复数衍射光栅，其可以处理从一定范围的角度到达且具有波长范围的多个平面和/或球面波。 该设备的应用包括波分多路复用器/解复用器，图像重构器，光束扩展器/压缩器和遮阳板/平视显示器。

公开(公告)号：WO1991010926A1

公开(公告)日：1991-07-25

申请号：PCT/US1991000142

申请日：1991-01-08

Applicant: POLAROID CORPORATION

Inventor： POLAROID CORPORATION ,  INGWALL, Richard, T. ,  TROLL, Mark, A. ,  WHITNEY, Duncan, H.

IPC: G02B05/32

CPC classification number: G02F1/1333 ,  G03H1/02 ,  G03H2001/026 ,  G03H2250/12 ,  G03H2260/12

Abstract: Composite holograms are disclosed wherein microvoids between the holographic interference fringes are filled with a liquid crystal. The diffraction efficiency and other holographic properties of such composite holograms may be varied by external stimuli, e.g., application of an electric field or thermal energy.

Abstract translation: 公开了全息干涉条纹之间的微孔用液晶填充的复合全息图。 这种复合全息图的衍射效率和其它全息图特性可以通过外部刺激来改变，例如施加电场或热能。

公开(公告)号：WO1991005278A1

公开(公告)日：1991-04-18

申请号：PCT/US1989004395

申请日：1989-10-03

Applicant: GRUMMAN AEROSPACE CORPORATION

Inventor： GRUMMAN AEROSPACE CORPORATION ,  LEIB, Kenneth, G.

IPC: G02B05/32

CPC classification number: G06K9/741 ,  G06E3/003 ,  G06K9/74

Abstract: As multiple matched filters (45) for optical correlators increase in size, their design, fabrication and alignment become increasingly complex and critical for proper operation of the optical correlator. The present invention places special alignment targets (46) on the multiple matched filter memory (44) to provide for proper alignment thereof to enable efficient correlator operation.

公开(公告)号：WO1985002024A1

公开(公告)日：1985-05-09

申请号：PCT/GB1984000355

申请日：1984-10-22

Applicant: APPLIED HOLOGRAPHICS PLC ,  BLYTH, Jeffrey

Inventor： APPLIED HOLOGRAPHICS PLC

IPC: G02B05/32

CPC classification number: G03H1/04 ,  G02B5/0252 ,  G02B5/32 ,  G03H2001/0417 ,  G03H2001/2278 ,  G03H2210/562

Abstract: A method of holographing an object wherein, in order to obtain a required diffusely illuminated background, the object is holographed against a background constituted by a hologram which is adapted to simulate a real background from which the hologram has been produced. Typically, the object is holographed against a hologram of a matt white box. The background hologram is preferably a hologram used in its pseudoscopic mode but may be a hologram used in its orthoscopic mode but projected as a real image.

Abstract translation: 一种对物体进行全息照相的方法，其中为了获得所需的漫射照明背景，该物体与由全息图构成的背景进行全息照相，该全息图适于模拟已经产生全息图的实际背景。 通常，对象是针对无光泽白盒的全息图进行全息照相。 背景全息图优选地是在其假镜模式中使用的全息图，但是可以是在其正视模式下使用但被投影为实像的全息图。

公开(公告)号：WO1995012826A1

公开(公告)日：1995-05-11

申请号：PCT/US1994011818

申请日：1994-10-19

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  CHEN, Alan, G. ,  JELLEY, Kevin, W. ,  VALLAITH, George, T.

IPC: G02B05/32

CPC classification number: G02F1/133555 ,  G02B5/32 ,  G03H2001/0439 ,  G03H2001/2655 ,  G03H2222/36

Abstract: A liquid crystal display device (30) that is illuminatable by diffuse ambient light comprises a liquid crystal panel (32) and a reflective holographic optical element (34). Diffuse ambient light illuminating the front side (36) of the liquid crystal panel and traversing the liquid crystal panel is received at a reflection site (66) and is redirected with a reflection pattern (68) to retraverse the liquid crystal panel to form a bright pixel for a display. By concentrating diffuse light within a preferential reflection pattern, the reflective holographic optical element provides enhanced brightness for viewing the display under ambient light conditions. In one aspect, the reflective holographic optical element is a transflector (158, 208) and is combined with an internal light source (170, 220) for illuminating the display using either reflected ambient light or backlighting.

Abstract translation: 由漫射环境光可照明的液晶显示装置（30）包括液晶面板（32）和反射型全息光学元件（34）。 照射液晶面板的前侧（36）并横穿液晶面板的漫射环境光被接收在反射位置（66）处，并且以反射图案（68）重定向以重新横向液晶面板以形成明亮的 像素显示。 通过将漫射光集中在优先反射图案中，反射全息光学元件在环境光条件下提供用于观看显示器的增强亮度。 在一个方面，反射全息光学元件是透射反射器（158,208），并且与内部光源（170,220）组合，用于使用反射的环境光或背光来照亮显示器。

公开(公告)号：WO1994007161A1

公开(公告)日：1994-03-31

申请号：PCT/US1993008824

申请日：1993-09-17

Applicant: KELLY, Shawn, L.

IPC: G02B05/32

CPC classification number: G02B27/46 ,  G02B27/0025 ,  G02B27/017 ,  G02B27/0172 ,  G02B2027/011 ,  G02B2027/012 ,  G02B2027/0123 ,  G02B2027/0127 ,  G02B2027/0143 ,  G02B2027/0152 ,  G09B9/307

Abstract: An imaging system (10) for a Head-Mounted Display (HMD) comprises a projection screen (22) integrally formed with a headgear structure of the HMD. An image source is projected onto the projection screen (22) as an intermediate image. An optical sub-system (24), such as a lens, re-images the intermediate image to form a virtual image as viewed by a user's eye (26). The present invention provides improved imaging while reducing the weight and manufacturing cost of the HMD. In accordance with another aspect of the present invention, an optical spatial filter (28) is utilized in an HMD imaging system to remove unwanted image artifacts, and increase the depth of focus of an intermediate projected image.

Abstract translation: 用于头戴式显示器（HMD）的成像系统（10）包括与HMD的头架结构整体形成的投影屏（22）。 将图像源投影到投影屏幕（22）上作为中间图像。 诸如透镜的光学子系统（24）重新成像中间图像以形成用户眼睛观察到的虚拟图像（26）。 本发明提供了改进的成像，同时降低了HMD的重量和制造成本。 根据本发明的另一方面，在HMD成像系统中使用光学空间滤波器（28）来去除不想要的图像伪影，并增加中间投影图像的焦深。

公开(公告)号：WO1993008491A1

公开(公告)日：1993-04-29

申请号：PCT/US1992008515

申请日：1992-10-13

Applicant: LEWIS, Aaron ,  PINEVSKY, Ilan

IPC: G02B05/32

CPC classification number: G02B27/0933 ,  B23K26/06 ,  B23K26/0604 ,  B23K26/064 ,  B23K26/066 ,  G02B5/32 ,  G02B27/0037 ,  G02B27/09 ,  G02B27/0944 ,  G02B27/0988

Abstract: A method that is based on processing a substance (7) to any desired form based on altering the energy distribution of the laser (1) beam so that the substrate (7) can be processed to the desired spatial structure in a parallel fashion, even for lasers (1) that have poor beam quality such as low spatial or temporal coherence or unreproducible multimode structure or poor beam pointing stability by using a method of beam homogenization (3) like a channel integrator and altering the profile of the beam with appropriate optical elements (2, 4, 5, 6) based on the principles of geometric optics, such as aspherical lenses or mirrors whose surfaces are derived by mathematical solutions that are related to the desired energy redistribution and by working in a region where the material laser (1) interaction's dependence on energy is known.

Abstract translation: 基于改变激光（1）光束的能量分布，基于将物质（7）处理成任何所需形式的方法，使得可以以平行的方式将衬底（7）加工成所需的空间结构，甚至 对于具有较差波束质量的激光器（1），例如低空间或时间相干性或不可重现的多模式结构或通过使用光束均匀化（3）的方法（例如通道积分器）并且用适当的光学器件改变光束的轮廓 基于几何光学原理的元件（2,4,5,6），例如非球面透镜或反射镜，其表面通过与期望的能量再分布相关的数学解决方案导出，并且通过在材料激光（ 1）交互对能量的依赖是已知的。

公开(公告)号：WO1992015906A1

公开(公告)日：1992-09-17

申请号：PCT/US1992001599

申请日：1992-02-26

Applicant: THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE

Inventor： THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE ,  FELDMAN, Michael, Robert

IPC: G02B05/32

CPC classification number: G02B6/43 ,  G02B5/32

Abstract: A programmable optical interconnection apparatus (10) and method in which a plurality of spatial light modulators (14) form a plurality of spatially modulated beams (22a-b) from a data signal (12). A hologram (16) is responsive to the spatially modulated beams (22a-b) for generating at least two destructively interfering coherent beams (36a-b) at a first optical detector (18a) to thereby disconnect the data signal (12) therefrom, and for simultaneously generating at least two constructively interfering coherent beams (38a-b) at a second optical detector (18b) to thereby connect the data signal (12) thereto. The hologram (16) is preferably a computer generated thin hologram (16) which does not rely on Bragg diffraction. A low cost, high density, high efficiency programmable optical interconnect is thereby provided.

公开(公告)号：WO1986004155A1

公开(公告)日：1986-07-17

申请号：PCT/US1985002462

申请日：1985-12-11

Applicant: NCR CORPORATION

Inventor： NCR CORPORATION ,  FERRANTE, Ronald, Alfred

IPC: G02B05/32

CPC classification number: G02B27/0927 ,  G02B5/32 ,  G02B27/09 ,  G02B27/0944

Abstract: A method for constructing an optical filter for use in a holographic scanner, includes splitting a beam (22) from a laser (20), focusing the beams so obtained on a photosensitive film (34) positioned at a predetermined distance from the laser (20), and developing the film (34). A silver-halide gelatin film or a dichromate sensitized gelatin film is used to record in one or another regions of the spectrum. The developed film acts as a holographic phase filter when reinserted at said predetermined distance, causing the beam of light emerging from the filter to have a uniform irradiance. The phase filter according to the invention is highly resistant to thermal laser damage and is comparatively cheap to produce.

Abstract translation: 一种用于构造用于全息扫描器的滤光器的方法，包括从激光器（20）分离光束（22），将如此获得的光束聚焦在位于距离激光器（20）预定距离的感光膜（34） ），并显影薄膜（34）。 使用卤化银明胶膜或重铬酸盐敏化明胶膜记录光谱的一个或另一个区域。 显影的膜在以所述预定距离重新插入时用作全息相位滤光器，导致从滤光器出射的光束具有均匀的辐照度。 根据本发明的相位滤波器对热激光损伤具有高度的抗性，并且制造相对便宜。