公开(公告)号：US07002752B2

公开(公告)日：2006-02-21

申请号：US10713548

申请日：2003-11-14

Applicant: Jianmin Chen ,  Michael G. Robinson ,  Gary D. Sharp ,  Jonathan R. Birge

Inventor： Jianmin Chen ,  Michael G. Robinson ,  Gary D. Sharp ,  Jonathan R. Birge

IPC: G02B27/14 ,  G02B21/14

CPC classification number: G02B27/288

Abstract: The present application describes color management architecture for a three-panel projection system that utilizes color selective polarization filters (CSPF) and polarizing beam splitting elements. An exemplary embodiment describes a color management architecture with a dichroic input beam splitter and three polarizing beam splitters. An output polarizing beam splitter is used as an analyzer. The color management system architecture can isolate any color channel from those remaining whose separation and combination are then carried out by a single beamsplitting element. The disclosed embodiments also provide an improvement in the ANSI contrast. In some embodiments, an achromatic quarter-wave plate is used in combination with a color filter to block the light reflected from projection optics.

Abstract translation: 本申请描述了利用彩色选择偏振滤光器（CSPF）和偏振分束元件的三面板投影系统的颜色管理架构。 示例性实施例描述了具有二向色输入分束器和三个偏振分束器的颜色管理架构。 输出偏振分束器用作分析器。 颜色管理系统架构可以将任何颜色通道与剩下的颜色通道隔离，然后通过单个分光元件进行分离和组合。 所公开的实施例还提供了ANSI对比度的改进。 在一些实施例中，消色差四分之一波片与滤色器组合使用以阻挡从投影光学器件反射的光。

公开(公告)号：US06899430B2

公开(公告)日：2005-05-31

申请号：US09736135

申请日：2000-12-15

Applicant: Kristina M. Johnson ,  Gary D. Sharp

Inventor： Kristina M. Johnson ,  Gary D. Sharp

IPC: G02B5/04 ,  G02B5/30 ,  G02B27/28 ,  G02F1/01 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  G03B21/14 ,  G03B33/12 ,  H04N9/31

CPC classification number: H04N9/3105 ,  G02B27/283 ,  G03B21/2073 ,  G03B33/12 ,  H04N9/3167

Abstract: A system for separating light into different spectrums and for recombining the light includes at least one polarizing beamsplitter and at least one retarder stack configured to condition the polarization of input light differently for different spectrums. A device embodying the invention could utilize multiple polarizing beamsplitters and multiple retarder stacks. Alternatively, a system could utilize a single polarizing beamsplitter and a single retarder stack in combination with one or more dichroic beamsplitters. In preferred embodiments, one or more reflective modulator panels are included to separately modulate each separated spectrum of light. Such an embodiment can be used for a color projection system. In each of the embodiments that utilize modulators, distances between the modulators and the focusing optics is essentially the same.

Abstract translation: 用于将光分离成不同光谱并用于重新组合光的系统包括至少一个偏振分束器和至少一个延迟器堆叠，其被配置成不同于不同光谱来调节输入光的偏振。 体现本发明的装置可以利用多个偏振分束器和多个延迟器堆叠。 或者，系统可以使用单个偏振分束器和单个延迟器堆叠与一个或多个二向色束分离器组合。 在优选实施例中，包括一个或多个反射调制器面板以分别调制每个分开的光谱。 这样的实施例可以用于彩色投影系统。 在利用调制器的每个实施例中，调制器和聚焦光学器件之间的距离基本相同。

公开(公告)号：US06650377B2

公开(公告)日：2003-11-18

申请号：US09779443

申请日：2001-02-09

Applicant: Michael G. Robinson ,  Gary D. Sharp

Inventor： Michael G. Robinson ,  Gary D. Sharp

IPC: G02F11335

CPC classification number: H04N9/3126 ,  H04N9/3111

Abstract: An apparatus that includes a first panel that receives image information for a first color, a second panel that receives image information for a second color and a third color, a temporal modulator and polarizing unit that receives light that includes a first color light, a second color light, and a third color light, and passes either said first color light and said second color light or said first color light and said third color light, and a single beamsplitting and combining device for directing said first color light to said first panel and said second or third color light to said second panel.

公开(公告)号：US06310673B1

公开(公告)日：2001-10-30

申请号：US09362954

申请日：1999-07-30

Applicant: Gary D. Sharp

Inventor： Gary D. Sharp

IPC: G02F11335

CPC classification number: H04N9/3126 ,  G02B27/288 ,  G02F1/0136 ,  G02F1/13363 ,  G02F1/13473 ,  G02F1/23 ,  G02F2001/133638 ,  G02F2413/04 ,  G02F2413/08 ,  H04N5/66 ,  H04N5/7441 ,  H04N9/3111 ,  H04N9/3167

Abstract: This invention provides a complementary color polarizer using a single polarizing film followed by a stack of two or more retarders. In a preferred embodiment, the color polarizers of this invention produce orthogonally polarized complementary primary colors (red/cyan, green/magenta, or blue/yellow). This invention further provides color filters which utilize the color polarizers of this invention in combination with a polarization separator to separate the orthogonally polarized colors. The polarization separator can be passive, such as a polarizing beam splitter, or active, such as a switchable polarizer. The switchable polarizer can employ a nematic or a smectic liquid crystal cell. Two color filters of this invention can be cascaded to provide a three color (RGB) filter with an off-state. In combination with a monochrome display or camera, the color filters of this invention provide color displays or cameras.

Abstract translation: 本发明提供了一种使用单个偏振膜，然后是两个或更多个延迟器的叠层的补色型偏振器。 在优选实施例中，本发明的彩色偏光板产生正交极化的互补原色（红色/青色，绿色/品红色或蓝色/黄色）。 本发明还提供了利用本发明的彩色偏振器与偏振分离器组合以分离正交偏振色彩的滤色器。 偏振分离器可以是无源的，例如偏振分束器，或者有源的，例如可切换的偏振器。 可切换偏振器可采用向列型或近晶型液晶单元。 本发明的两个滤色器可以级联以提供具有关闭状态的三色（RGB）滤光器。 结合单色显示器或照相机，本发明的滤色器提供彩色显示器或照相机。

公开(公告)号：US06273571B1

公开(公告)日：2001-08-14

申请号：US09410098

申请日：1999-10-01

Applicant: Gary D. Sharp ,  Kristina M. Johnson

Inventor： Gary D. Sharp ,  Kristina M. Johnson

IPC: G03B2114

CPC classification number: G02F1/1336 ,  G02B5/3083 ,  G02B27/288 ,  G02F1/0136 ,  G02F1/0322 ,  G02F1/09 ,  G02F1/133533 ,  G02F1/133536 ,  G02F1/13362 ,  G02F1/13363 ,  G02F1/13473 ,  G02F1/23 ,  G02F2001/133543 ,  G02F2001/133638 ,  G02F2413/04 ,  G02F2413/08 ,  H04N5/66 ,  H04N5/7441 ,  H04N9/3167

Abstract: A system architecture for a display system with electronically controlled optical retarder stacks. The system uses only one spatial light modulator and a color filter to determine what the color of the image created by the modulator will be when projected onto a display surface. In one embodiment, the color filter passes one of red, green or blue light at any give time. The color filter can be placed between the light source and the modulator optics, between the modulator optics and the modulator, between the modulator and the projection optics, or made part of the projection optics itself. The retarder stack for transforming at least partially polarized input light can include a first retarder and a second retarder. The first retarder has a first retardance and a first orientation and the second retarder has a second retardance and a second orientation, both orientations with respect to the partially polarized light. The first retardance, first orientation, second retardance, and second orientation can be arranged to yield the desired polarization transformed light which includes a first spectrum and a second spectrum. The polarization of the first spectrum and the polarization of the second spectrum can be made orthogonal to each other. The polarizations can be linear or elliptical. If the polarization transformed light is linear, the directions of polarizations are different and in one case can be made perpendicular. If the polarization of the polarization transformed light is elliptical, then the polarizations are different and in on case can be made orthogonal in the general sense of orthogonality of polarization states.

Abstract translation: 一种具有电子控制光学延迟器堆叠的显示系统的系统架构。 该系统仅使用一个空间光调制器和滤色器来确定当投影到显示器表面上时由调制器创建的图像的颜色将是什么。 在一个实施例中，滤色器在任何给定时间通过红色，绿色或蓝色光中的一种。 滤色器可以放置在光源和调制器光学器件之间，调制器光学器件和调制器之间，调制器和投影光学器件之间，或者被制成投影光学器件本身的一部分。 用于变换至少部分偏振的输入光的延迟器叠层可以包括第一延迟器和第二延迟器。 第一延迟器具有第一延迟和第一取向，并且第二延迟器具有相对于部分偏振光的两个取向的第二延迟和第二取向。 第一延迟，第一取向，第二延迟和第二取向可以被布置成产生包括第一光谱和第二光谱的期望的偏振变换光。 可以使第一光谱的极化和第二光谱的极化彼此正交。 极化可以是线性或椭圆形。 如果偏振变换的光线是线性的，则极化方向是不同的，在一种情况下可以是垂直的。 如果偏振变换光的极化是椭圆形的，那么极化是不同的，并且在极化状态的正交性的一般意义上可以使其正交。

公开(公告)号：US5870159A

公开(公告)日：1999-02-09

申请号：US549963

申请日：1995-10-30

Applicant: Gary D. Sharp

Inventor： Gary D. Sharp

IPC: G02F1/13 ,  G02F1/01 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/141 ,  G02F1/1335

CPC classification number: G02F1/13471 ,  G02F1/0136 ,  G02F1/13363 ,  G02F1/141 ,  G02F2001/133638 ,  G02F2203/04 ,  G02F2203/07 ,  G02F2203/62 ,  G02F2413/02 ,  G02F2413/08

Abstract: This invention provides a liquid crystal achromatic polarization rotator switch, and an achromatic shutter using the rotator switch. The rotator switch requires input light of a fixed orientation and switches between rotating the polarization by zero degrees and by a fixed angle, .beta.. The achromatic shutter uses an achromatic 90-degree rotator switch positioned between a pair of polarizers. A first embodiment of the rotator switch comprises one planar-aligned rotatable smectic liquid crystal half-wave retarder in series with one passive half-wave retarder. The smectic liquid crystal cell has fixed retardance and is driven between two orientations for off- and on-states. A second embodiment of the rotator switch utilizes two variable birefringence liquid crystal cells. The variable birefringence cells having fixed orientation and variable retardance. In the off-state both retarders have zero retardance and in the on-state they have half-wave retardance.

公开(公告)号：US5781268A

公开(公告)日：1998-07-14

申请号：US629976

申请日：1996-04-09

Applicant: Jian-Yu Liu ,  Charles S. Wong ,  Kristina M. Johnson ,  Gary D. Sharp

Inventor： Jian-Yu Liu ,  Charles S. Wong ,  Kristina M. Johnson ,  Gary D. Sharp

IPC: G02F1/13363 ,  G02F1/21 ,  G02F1/1335 ,  G02F1/139

CPC classification number: G02F1/216 ,  G02F2001/133638 ,  G02F2203/06

Abstract: This invention provides polarization-independent optical filters that are Fabry-Perot filters. The inventive filters incorporate a phase modulator within the FP cavity and two quarter-wave plates, one on either side of the phase modulator, in the cavity. The quarter-wave plates are perpendicular to each other and oriented at .+-.45.degree. with respect to the optic axis of the phase modulator. A variety of phase modulators including those that incorporate nematic and smectic liquid crystal optical modulators can be employed in these FP filters. The filters of this invention are particularly useful in fiber optic systems and in telecommunications applications at 1550 nm.

Abstract translation: 本发明提供了法布里 - 珀罗滤波器的偏振非依赖光滤波器。 本发明的滤光器在FP空腔内并入相位调制器，在空腔中包括两个1/4波片，一个位于相位调制器的两侧。 四分之一波片彼此垂直并相对于相位调制器的光轴定向在+/- 45°。 包括向列型和近晶型液晶光调制器的各种相位调制器可用于这些FP滤波器。 本发明的滤波器在1550nm的光纤系统和电信应用中特别有用。

公开(公告)号：US5493426A

公开(公告)日：1996-02-20

申请号：US056415

申请日：1993-05-03

Applicant: Kristina M. Johnson ,  Anat Sneh ,  Jian-Yu Liu ,  Gary D. Sharp

Inventor： Kristina M. Johnson ,  Anat Sneh ,  Jian-Yu Liu ,  Gary D. Sharp

IPC: G02F1/13 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/1347 ,  G02F1/135 ,  G02F1/137 ,  G02F1/139 ,  G02F1/141 ,  G02F1/21 ,  G02F1/133

CPC classification number: G02F1/1418 ,  G02F1/13471 ,  G02F1/135 ,  G02F1/141 ,  G02F1/216 ,  G02F1/134309 ,  G02F1/134363 ,  G02F1/13439 ,  G02F2001/133638 ,  G02F2001/133738 ,  G02F2001/133742 ,  G02F2203/05 ,  G02F2203/055 ,  G02F2203/06 ,  G02F2203/50

Abstract: This invention provides smectic liquid crystal cells with lateral electrodes. The effective change in refractive index with field-induced tilting of the liquid crystal molecules is increased by providing an angle between the direction of propagation of light and the direction of the molecular directors at zero applied field. For homeotropically aligned liquid crystals this is accomplished by inclining the incident light beam at an oblique angle to the device surface. For tilted layer cells the liquid crystal layers are tilted and the light can impinge at normal incidence. This invention further provides Fabry-Perot filters utilizing lateral electrode liquid crystal cells.

Abstract translation: 本发明提供具有横向电极的近晶液晶单元。 通过在零施加场处提供光的传播方向和分子导向器的方向之间的角度来增加液晶分子的场致倾斜的折射率的有效变化。 对于垂直取向的液晶，这是通过使入射光束以与设备表面成倾斜角倾斜来实现的。 对于倾斜层细胞，液晶层倾斜，并且光可以以正常入射的方式入射。 本发明还提供了利用横向电极液晶单元的法布里 - 珀罗滤波器。

公开(公告)号：US11294113B2

公开(公告)日：2022-04-05

申请号：US16037934

申请日：2018-07-17

Applicant: Gary D. Sharp

Inventor： Gary D. Sharp

IPC: G02B5/30 ,  G02F1/13363

Abstract: A compound retarder that creates independent control of Re and Rth. This can be done by forming a three-layer compound retarder, including a pair of matched −A-plates, combined with single +A-plate. The +A-plate is typically an MD-stretched film, with retardation that is specific to the in-plane requirements (Re) of the application. The pair of −A-plates have their optic axes crossed, such that Re=0, with an optic axis aligned parallel to the +A-plate. A single retardation value for the −A-plate can produce improved field-of-view performance over a broad range of Revalues, making it a very practical means of universal compensation. While Rthis typically associated with a single retarder, retarder stacks with a diverse range of optic-axis orientations can be considered to have a compound (or composite) Rth value (RthC). The three-layer compound retarder has the practical benefit of enabling field-of-view compensation across a broad range of normal-incidence polarization transformations.

公开(公告)号：US20190235145A1

公开(公告)日：2019-08-01

申请号：US16260903

申请日：2019-01-29

Applicant: GARY D. SHARP ,  ANTHONY D. McGETTIGAN

Inventor： GARY D. SHARP ,  ANTHONY D. McGETTIGAN

IPC: G02B5/30 ,  G02B27/30 ,  G02B27/09

CPC classification number: G02B5/3025 ,  G02B27/0977 ,  G02B27/30

Abstract: Hollow optical elements that derive optical power from compound-curved reflective surfaces to produce a desired composite optical power. The reflective surfaces in combination with polarization control, can produce a triple-pass arrangement that determines the optical power. Two functional films, one or both of which are formed (e.g., thermoformed), can be joined at the perimeter to form units that are mechanically robust and therefore preserve optical performance under mechanical load. The air-spaced cavity formed between the two layers is free of birefringence concerns, where polarization control is crucial to contrast. These optical elements can be installed in frames or headsets to form lightweight wearable magnifiers, wide-angle collimators, tele-photo lenses, or for any application requiring optical power. They may be most appropriate for applications where light efficiency is not critical, such as well-lit environments, where the insertion-loss of 1 to 2 stops is not problematic