公开(公告)号：EP2887123A1

公开(公告)日：2015-06-24

申请号：EP13306758.7

申请日：2013-12-18

Applicant: Thomson Licensing

Inventor： Blonde, Laurent ,  Drazic, Valter

IPC: G02B27/01

CPC classification number: G02B27/0101 ,  G02B3/08 ,  G02B5/04 ,  G02B5/1842 ,  G02B5/3016 ,  G02B5/3083 ,  G02B6/00 ,  G02B6/0055 ,  G02B13/16 ,  G02B17/004 ,  G02B17/006 ,  G02B19/0038 ,  G02B26/005 ,  G02B27/0075 ,  G02B27/01 ,  G02B27/0103 ,  G02B27/017 ,  G02B27/0172 ,  G02B27/0176 ,  G02B27/022 ,  G02B27/0905 ,  G02B27/14 ,  G02B2027/0118 ,  G02B2027/0123 ,  G02B2027/0127 ,  G02B2027/0154 ,  G02B2027/0163 ,  G02B2027/0178 ,  G02F1/315 ,  G03B21/28 ,  G06T19/20 ,  G09G3/36

Abstract: An optical see-through glass type display device (100) comprises: an image projector (140; 500; 600) projecting a virtual image; a first optical element (130) configured to guide a virtual image light; and a second optical element (120) having a first reflection surface (122a) for reflecting back a light coming through the front surface of the second optical element (120) and a second reflection surface (124a) for retro-reflecting a light coming through the rear surface of the second optical element (120). The second optical element (120) is switchable between a first state in which the reflection on the first and second reflection surfaces (122a, 124a) is enabled and a second state in which the reflection on the first and second reflection surfaces (122a, 124a) is disabled.

Abstract translation: 一种光学透视玻璃式显示装置（100），包括：投影虚像的图像投影仪（140; 500; 600） 被配置为引导虚像光的第一光学元件（130） 和第二光学元件（120），其具有用于反射通过第二光学元件（120）的前表面的光的第一反射表面（122a）和用于回射穿过第二光学元件（120）的光的第二反射表面（124a） 第二光学元件（120）的后表面。 第二光学元件（120）可在第一和第二反射表面（122a，124a）上的反射被启用的第一状态和第一和第二反射表面（122a，124a）上的反射 ） 被禁用。

公开(公告)号：EP2322957A1

公开(公告)日：2011-05-18

申请号：EP09175783.1

申请日：2009-11-12

Applicant: poLight AS

Inventor： Kartashov, Vladimir ,  Akram, Muhammad Nadeem

IPC: G02B5/18 ,  G02B27/48

CPC classification number: G02B27/48 ,  G02B5/1828 ,  G02F1/292 ,  G02F1/315 ,  G02F2201/305

Abstract: The present invention relates to a device and system for improving a laser light based imaging projection system, and especially to a device and system for controlling speckle contrast in laser light imaging projection systems according to a specific speckle reduction scheme. A device and system according to the present invention comprises at least on spatial light modulator with a programmable grating geometry on a reflective surface of the device. A series of control signals can then provide a static speckle pattern or a plurality uncorrelated speckle patterns. The device and system according to the present invention can utilize the programmable grating feature to decrease, or increase the speckle in whole images or parts of images being projected in the system.

Abstract translation: 本发明涉及一种用于改进基于激光的成像投影系统的装置和系统，特别涉及一种根据特定的散斑减少方案来控制激光成像投影系统中的斑点对比度的装置和系统。 根据本发明的装置和系统至少包括在装置的反射表面上具有可编程光栅几何形状的空间光调制器。 一系列控制信号可以提供静态散斑图案或多个不相关的散斑图案。 根据本发明的装置和系统可以利用可编程光栅特征来减少或增加在整个图像中或在系统中投射的图像的部分的斑点。

公开(公告)号：EP1609023A4

公开(公告)日：2008-09-03

申请号：EP04720932

申请日：2004-03-16

Applicant: NOKIA CORP

Inventor： SCHRADER MARTIN ,  LEVOLA TAPANI

IPC: G02F1/1335 ,  G02B5/18 ,  G02B26/08

CPC classification number: G02F1/195 ,  G02B5/045 ,  G02B26/0808 ,  G02B26/0825 ,  G02F1/315 ,  G02F2203/12

Abstract: A direct view display device based on light reflection and diffraction from a deformable material layer under influence of an electric field. The display device comprises a plurality of pixel cells, each cell has at least a first prism surface to support the deformable material, such that when the electric field is off, a light beam travels through the first prism surface and the deformable material is reflected via total internal reflection through the first prism surface to a second prism surface, whereby the light beam is directed toward a beam blocker. When the electric field is on, the deformable material forms a rippled surface to diffract the encountering light beam, allowing part of the light beam to avoid the beam blocker. A microlens is used for each pixel cell to focus the light beam at the beam blocker.

公开(公告)号：EP1332391B1

公开(公告)日：2008-01-02

申请号：EP01983107.2

申请日：2001-10-09

Applicant: Thackara, John I.

Inventor： Thackara, John I.

IPC: G02B6/35 ,  G02F1/13

CPC classification number: G02F1/313 ,  G02B6/105 ,  G02B6/266 ,  G02B6/3546 ,  G02B6/3594 ,  G02B6/3596 ,  G02F1/132 ,  G02F1/1326 ,  G02F1/315 ,  G02F2203/48

Abstract: A planar waveguide integrated optic switch (10)suitable for use in optical cross-connect applications. A narrow trench (13) in the planar waveguide core layer (12) is filled with a liquid crystal (14) material possessing positive birefringence. When held at a temperature a few degrees above the clearing point, the liquids crystal's isotropic refractive index is matched to that of the core layer allowing nearly complete optical transmission (17C) through the switch. When held at a temperature a few degrees below the clearing point, the liquid crystal's ordinary refractive index is lower than that of the core layer and both polarizations of the incident optical radiation are totally reflected (17b) from the trench. When coupled with planar waveguide beam expanding and refocusing elements, arrays of the switches can be used to form an optical cross-connect capable of fully interconnecting linear arrays of single- or multi-mode optical fibers with very low optical loss. By controlling the liquid crystal temperature at more than one location along the trench, the switch can be configured to operate as a variable attenuator.

公开(公告)号：EP1540410B1

公开(公告)日：2006-06-07

申请号：EP03794503.7

申请日：2003-08-26

Applicant: Kodak Polychrome Graphics, LLC

Inventor： MOULIN, Michel

IPC: G02F1/03 ,  G02F1/01 ,  G02F1/315

CPC classification number: G02F1/315 ,  G02F1/0121 ,  G02F1/0305 ,  G02F2203/21

Abstract: The present invention provides an imaging assembly comprising: (a) a modulator crystal (12) comprising a first surface (11) and a second surface substantially opposite to the first surface (11), wherein the first surface (11) comprises an active area (26); and (b) a heating element (20) for heating the modulator crystal (12) to a temperature within a predetermined temperature range, wherein the heating element (20) is positioned under the modulator crystal and comprises a first surface (21), wherein the heating element (20) first surface (21) faces the modulator crystal (12) second surface and covers a portion of the modulator crystal second surface such that the active area (26) of the first surface (11) of the modulator crystal (12) has a homogeneous temperature distribution. The present invention also provides a method for heating a modulator crystal in an imaging assembly.

公开(公告)号：EP1332391A4

公开(公告)日：2006-05-24

申请号：EP01983107

申请日：2001-10-09

Applicant: THACKARA JOHN I

Inventor： THACKARA JOHN I

IPC: G02B6/10 ,  G02B6/26 ,  G02B6/35 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/313 ,  G02F1/315 ,  G02F1/13

CPC classification number: G02F1/313 ,  G02B6/105 ,  G02B6/266 ,  G02B6/3546 ,  G02B6/3594 ,  G02B6/3596 ,  G02F1/132 ,  G02F1/1326 ,  G02F1/315 ,  G02F2203/48

Abstract: A planar waveguide integrated optic switch (10)suitable for use in optical cross-connect applications. A narrow trench (13) in the planar waveguide core layer (12) is filled with a liquid crystal (14) material possessing positive birefringence. When held at a temperature a few degrees above the clearing point, the liquids crystal's isotropic refractive index is matched to that of the core layer allowing nearly complete optical transmission (17C) through the switch. When held at a temperature a few degrees below the clearing point, the liquid crystal's ordinary refractive index is lower than that of the core layer and both polarizations of the incident optical radiation are totally reflected (17b) from the trench. When coupled with planar waveguide beam expanding and refocusing elements, arrays of the switches can be used to form an optical cross-connect capable of fully interconnecting linear arrays of single- or multi-mode optical fibers with very low optical loss. By controlling the liquid crystal temperature at more than one location along the trench, the switch can be configured to operate as a variable attenuator.

公开(公告)号：EP1206723A4

公开(公告)日：2005-02-16

申请号：EP00942983

申请日：2000-06-16

Applicant: REVEO INC

Inventor： FARIS SADEG M ,  MA KELVIN ,  LU D T GEORGE ,  TRIPATHI SANJAY ,  KANE STEVEN J

IPC: G02F1/315 ,  H04Q11/00 ,  G02F1/01 ,  G02B6/00 ,  G02B6/26 ,  G02F1/035 ,  G02F1/295 ,  G02F1/31 ,  G02F1/335

CPC classification number: G02F1/315 ,  G02F2203/07 ,  G02F2203/50 ,  H04Q11/0005 ,  H04Q2011/0035 ,  H04Q2011/005 ,  H04Q2011/0073 ,  H04Q2011/0081

Abstract: The present invention includes a switch element (100) which utilizes a single polarizer (110) to couple two discreet inputs to any combination of two discreet outputs (1, 2, 3, 4) along non-blocking optical paths. This switch element (100) may be conveniently networked to additional switch elements (100) for scaling to switches having larger numbers (N) of inputs and outputs such as shown as switches (150) and (150'). The present invention is relatively robust and insensitive to environmental disturbances and has a reconfiguration time which is an order of magnitude faster than conventional optomechanical switches which generally require tens of milliseconds before reconfiguration. It further provides for convenient scaling to a non-blocking NxN configuration using N (log2 N-1) 2x2 switches rather than conventional approaches which require N (log2 N) switches, for a simple and compact configuration.

Abstract translation: 开关元件利用单个偏振器将两个谨慎的输入耦合到沿着非阻塞光路的两个离散输出的任何组合。 该开关元件可以方便地联接到附加的开关元件，用于缩放到具有较大数量（N）个输入和输出的开关。 本发明提供通常与常规偏振门相关联的优点，包括兆比特每秒数据速率，以便于在光纤网络中使用。 该开关元件相对鲁棒且对环境干扰不敏感，并且具有重新配置时间，其比通常在重新配置之前需要几十毫秒的常规光机械开关快一个数量级。 开关元件提供恒定的数据路径长度，用于恒定的延迟，丢失和非限制数据输出。 该元件还有利地提供了使用N *（log2N-1）×2x2开关的非阻塞NxN配置的方便缩放，而不是需要N（log2N）开关的常规方法，用于相对简单和紧凑的配置。

公开(公告)号：EP0988573B1

公开(公告)日：2004-08-25

申请号：EP98920430.0

申请日：1998-05-08

Applicant: THE UNIVERSITY OF BRITISH COLUMBIA

Inventor： WHITEHEAD, Lorne, A.

IPC: G02B26/02 ,  G09F9/37

CPC classification number: G02F1/315 ,  G02B26/02 ,  G02F1/167 ,  G02F2203/026 ,  Y10S385/901

Abstract: A variably reflective display device amenable to mutiple pixel display applications. Each pixel has at least one element (10) having a reflective state in which incident light undergoes total internal reflection, and having a non-reflective state in which total internal reflection is prevented. Such prevention is achieved by interfering with (scattering and/or absorbing) the evanescent wave adjacent the surface of the element. For example, a member (18) can be positioned adjacent the element and deformed between first and second positions. In the first position a gap (20) remains between the member and the elememt to allow the evanescent wave to behave normally. In the second position the member is in optical (but not atomic) contact with the element, such that the member interferes with the evanescent wave and thereby prevents total internal reflection. In one embodiment, each pixel is a grouping of retro-reflective elements (12A, 12B, 12C...) such as corner reflectors. An elastomeric material (18) is provided adjacent each grouping. If a gap (20) is left between the grouping and the elastomeric material, the grouping continues to exhibit total internal reflection. But, if the elastomeric material makes optical contact with the grouping, the evanescent wave is absorbed or scattered and hence total internal reflection is prevented, which in turn prevents reflection of incident light. Thus, the "pixel" formed by the corner reflector grouping is "off" if it makes optical contact with the elastomeric material, and "on" if a gap is left between the two.

公开(公告)号：EP0124622B1

公开(公告)日：1991-01-30

申请号：EP83903566.4

申请日：1983-11-10

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： KITABATAKE, Makoto ,  SETSUNE, Kentaro ,  WASA, Kiyotaka

IPC: G02F1/01 ,  G02F1/03 ,  G02F1/19

CPC classification number: G02F1/315 ,  G02F1/0147

Abstract: A transparent prism (13) which has a light input surface (11), a light output surface (12) and a bottom surface (14) on which is provided a reflection control layer (15) which has a higher refractive index than the prism (13) and has a film thickness which is larger than the wavelength of light. When the reflection control layer (15) is formed of a thin film of an electro-optical material or a thin film of a heat-sensitive material, light (16) can be reflected or transmitted thereby by controlling an electrical field applied to the control layer (15) in the case of the former material, and by controlling the current supplied to a heating member provided for the control layer (15) in the case of the latter material. This light valve can effect high-speed switching between reflected light (161) and transmitted light (162). Therefore, it is possible to employ the light valve as an optical part, such as a switch or modulator for optical communication, or an element of a projection television receiver, or a printer.

公开(公告)号：EP0237331A3

公开(公告)日：1989-07-12

申请号：EP87302064.8

申请日：1987-03-11

Applicant: THE GENERAL ELECTRIC COMPANY, p.l.c.

Inventor： Skinner, Jeffrey David

IPC: G02F1/315 ,  G02F1/137

CPC classification number: G02F1/315

Abstract: An optical switch comprises a pair of glass prisms (10, 11) of refractive index n g and base angle θ one on either side of a liquid crystal interface (12) of positive dielectric anisotropy and having an extraordinary refraction index n o and an ordinary refraction index no. To reduce crosstalk the refractive index n g is so chosen that

Abstract translation: 光学开关包括在正介电各向异性的液晶界面（12）的两侧上具有折射率ng和底角θ的一对玻璃棱镜（10,11），具有非常折射率ne和普通折射率 没有。 为了减少串扰，折射率ng被选择为$m$