-
公开(公告)号：EP1292857B1
公开(公告)日：2006-08-09
申请号：EP01943763.1
申请日：2001-06-17
Applicant: Beamus Ltd.
Inventor： AMITAI, Yaakov
CPC classification number: G02F1/035 , G02B5/1866 , G02B6/1203 , G02B6/29304 , G02F2201/305 , H04J14/02
Abstract: The invention provides an optical device, including a light-transmissive substrate, and a pair of different, parallel gratings including a first grating and a second grating, located on the substrate at a constant distance from each other, each of the pair of parallel gratings including at least one sequence of a plurality of parallel lines, wherein the spacings between the lines gradually increase from one edge of the grating up to a maximum distance between the lines, and wherein the arrangement of lines in the second grating is in the same direction as that of the first grating. A system utilizing a plurality of such optical devices is also disclosed.
-
公开(公告)号：EP1334403A1
公开(公告)日：2003-08-13
申请号：EP01990716.1
申请日：2001-11-19
Applicant: Agilent Technologies Inc.
Inventor： KRAKLK, John, C. , STONE, Michelle, M.
IPC: G02F1/1334 , G02F1/31
CPC classification number: G02F1/31 , G02F1/13342 , G02F2201/305
Abstract: A PDLC transmissive phase grating (1) utilizing nematic liquid crystal materials confined in a polymer matrix. The PDLC grating (1) operates in the Bragg regime and switches between diffracting and non-diffracting states via an applied electric field. The grating (1) is made up of a PDLC grating film (10) contained within a cell. The PDLC film (10) has a spatially periodic distribution of grating planes which includes polymer-rich regions (52) and liquid crystal-rich regions (54), wherein the major constituent of the polymer-rich regions (52) is a polymer, and wherein the liquid crystal constituent concentration within the liquid-rich regions (54) is greater than the liquid crystal constituent concentration within said polymer-rich regions (52). The PDLC transmission phase grating (1) is rendered substantially transparent when subjected to an electric field during the application of light that is p-polarized and incident on the grating at Bragg angle.
-
公开(公告)号：EP1292857A2
公开(公告)日：2003-03-19
申请号：EP01943763.1
申请日：2001-06-17
Applicant: Beamus Ltd.
Inventor： AMITAI, Yaakov
IPC: G02F1/29
CPC classification number: G02F1/035 , G02B5/1866 , G02B6/1203 , G02B6/29304 , G02F2201/305 , H04J14/02
Abstract: The invention provides an optical device, including a light-transmissive substrate, and a pair of different, parallel gratings including a first grating and a second grating, located on the substrate at a constant distance from each other, each of the pair of parallel gratings including at least one sequence of a plurality of parallel lines, wherein the spacings between the lines gradually increase from one edge of the grating up to a maximum distance between the lines, and wherein the arrangement of lines in the second grating is in the same direction as that of the first grating. A system utilizing a plurality of such optical devices is also disclosed. A change in the refractive index of the substrate yields an angular deviation of the output wave. The refractive index of the substrate can be dynamically controlled by external means, e.g. by applying an electrical field.
-
公开(公告)号：EP0981065A2
公开(公告)日：2000-02-23
申请号：EP99122462.7
申请日：1996-08-26
Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Inventor： Alvelda, Phillip , Knight Jr.,Thomas F.
IPC: G02F1/1335
CPC classification number: G02F1/133621 , G02B27/017 , G02B27/0172 , G02B2027/0132 , G02B2027/0154 , G02B2027/0178 , G02F1/136 , G02F1/136277 , G02F2201/305 , G02F2203/34
Abstract: The present invention provides a visual display including a high resolution miniature display compatible with VLSI technology and an optical system such as an optical magnifier used to enlarge the images displayed on the miniature display to be visible to the naked eye. The miniature display includes a VLSI backplane having an array of display elements monolithically formed with its driving circuit on a single crystalline semiconductor. Signal processing circuit or a microprocessor used to process image signals for the display may also be formed monolithically with the array and its driving circuit. The array may be designed using a software silicon compiler program to have randomly displaced elements or superpixels for reducing image aliasing. The array may also be designed to have display elements positioned and scaled to compensate for the optical distortion introduced by the magnifier. A color microdisplay utilizes diffraction gratings to provide an array of high efficiency color pixels. The microdisplay includes a semiconductor substrate and source of light disposed adjacent thereto. A cover plate may be disposed above the substrate and has a layer of conductive material on a surface of the cover plate opposite the substrate. An optically active material, such as liquid crystal material, may be disposed between the substrate and the cover plate. An array of pixels are formed on the substrate. The pixel array includes an array of diffraction grating elements. Each element includes one or more diffraction gratings. The pitch of each diffraction grating can be a function of the angle of the incident light and the desired diffraction output spectrum. An optical system directs the diffracted light from each grating through the optically active material into viewing optics.
Abstract translation: 本发明提供一种包括与VLSI技术兼容的高分辨率小型显示器和诸如光学放大器的光学系统的视觉显示器，所述光学系统用于放大显示在微型显示器上以便肉眼可见的图像。 微型显示器包括VLSI背板，其具有在单晶半导体上以其驱动电路单片形成的显示元件阵列。 用于处理用于显示器的图像信号的信号处理电路或微处理器也可以与阵列及其驱动电路单片地形成。 可以使用软件硅编译器程序来设计阵列以具有随机移位元素或超像素以减少图像混叠。 该阵列还可以被设计为具有定位和缩放的显示元件以补偿由放大器引入的光学失真。 彩色微型显示器利用衍射光栅来提供一系列高效彩色像素。 微型显示器包括半导体衬底和与之相邻设置的光源。 盖板可以设置在基板上方并且在盖板的与基板相对的表面上具有一层导电材料。 诸如液晶材料的光学活性材料可以设置在基板和盖板之间。 在衬底上形成像素阵列。 像素阵列包括衍射光栅元件的阵列。 每个元件包括一个或多个衍射光栅。 每个衍射光栅的间距可以是入射光的角度和期望的衍射输出光谱的函数。 光学系统将来自每个光栅的衍射光引导通过光学活性材料进入观察光学器件。
-
公开(公告)号：EP0977077A2
公开(公告)日：2000-02-02
申请号：EP99305990.6
申请日：1999-07-28
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Date, Munekazu, Nippon Telegraph & Telephone Corp. , Suyama, Shiro, Nippon Telegraph & Telephone Corp. , Kato, Kinya, Nippon Telegraph & Telephone Corp. , Uehira, Kazutake, Nippon Teleg. & Telephone Corp.
IPC: G02F1/1335 , G02F1/1333 , G02F1/139 , G02F1/1343
CPC classification number: G02F1/1334 , G02B6/005 , G02B6/0055 , G02B6/0078 , G02F1/13336 , G02F1/13342 , G02F1/133553 , G02F1/1336 , G02F1/133615 , G02F1/134309 , G02F1/134363 , G02F1/1393 , G02F2001/13347 , G02F2001/133616 , G02F2001/13712 , G02F2201/08 , G02F2201/124 , G02F2201/305 , G02F2203/023 , G02F2203/026
Abstract: An optical device and a display apparatus of the present invention are constructed so as to improve display characteristics of output light intensity, display contrast, and reduction of scattered light due to external light, and also to provide a large-screen. The optical device has a first stacked body and a plurality of second stacked bodies. The first stacked body includes a light guide(230), a first electrode(231), and an optical control layer(232). The second stacked body includes a plurality of second electrodes(234), the reflection film(233) and a substrate (235). A plurality of third electrodes(237) are provided through the substrate(235). Each of the third electrode has a first end part connecting to the second electrode and a second end part exposed to the other side of the substrate. A further light absorption film(236) may be disposed between the reflection film and the second electrode.
Abstract translation: 本发明的光学装置和显示装置被构造成能够改善输出光强度的显示特性，显示对比度以及由于外部光而导致的散射光的减少，并且还能够提供大屏幕。 光学装置具有第一层叠体和多个第二层叠体。 第一层叠体包括导光体（230），第一电极（231）和光学控制层（232）。 第二层叠体包括多个第二电极（234），反射膜（233）和基板（235）。 多个第三电极（237）穿过衬底（235）设置。 每个第三电极具有连接到第二电极的第一端部和暴露于衬底的另一侧的第二端部。 另外的光吸收膜（236）可以设置在反射膜和第二电极之间。
-
Patent Agency Ranking96.发明公开
公开(公告)号：EP0972289A1
公开(公告)日：2000-01-19
申请号：EP98914401.9
申请日：1998-04-01
Applicant: Hong, Chin-Yih Rex , Horng, Herng-Er , Yang, Hong-Chang , Yeung, Wai-Bong
Inventor： Hong, Chin-Yih Rex , Horng, Herng-Er , Yang, Hong-Chang , Yeung, Wai-Bong
CPC classification number: H01F1/44 , G02F1/09 , G02F1/23 , G02F2201/305
Abstract: Methods for preparing homogeneous magnetic fluid compositions capable of forming ordered one dimensional structures or two dimensional lattices in response to externally applied magnetic fields are disclosed. The composition is prepared using improved co-precipitation methods in which the steps of the procedure have been tuned to reduce sample heterogeneity. Fe3O4 particles are coated with a surfactant and dispersed in a continuous carrier phase to form a homogeneous magnetic fluid composition. The ability of the composition to generate ordered structures can be tested by holding a magnet near a thin film of the compositions and observing the formation of colors in the region near the magnet. Methods for controlling the characteristic spacing of the ordered structures formed by the composition are also disclosed. Relevant parameters include the thickness of the film, the strength and orientation of the externally applied magnetic field, the rate of change of field strength, the volume fraction of the magnetic particles dispersed in the continuous phase, and the temperature of the film. The homogeneous magnetic fluid composition is useful for the manufacture of liquid crystal devices. The devices take advantage of the serendipitous fact that the spacings in the material are on the order of the wavelength of visible light. A variety of magnetic-optical devices can be constructed that use the ordered structures to diffract, reflect, and polarize light in a controlled and predictable manner. These devices include color displays, monochromatic light switches, and tunable wavelength filters.
-
公开(公告)号：EP0886151A3
公开(公告)日：1999-09-22
申请号：EP98110204.9
申请日：1998-06-04
Applicant: KOKUSAI DENSHIN DENWA CO., LTD
Inventor： Utaka, Katsuyuki , Tanaka, Shinsuke c/o Kokusai , Horita, Masayoshi, c/o Kokusai , Matsushima, Yuichi c/o Kokusai
CPC classification number: G02F1/3132 , G02B6/12007 , G02B2006/12107 , G02B2006/12147 , G02F2201/305
Abstract: The coupled waveguide structure comprise first and second rectangular waveguides (12,14), disposed closely. The aspect ratio of the first waveguide is substantially inverse in number to that of the second waveguide. As a result, the magnitude relation between the TE mode propagation constant and the TM mode propagation constant is opposite between the first waveguide and the second waveguide, and this makes it easier to equalize the coupling conditions for the TE mode coupling and the TM mode coupling. Therefore, polarization dependency can be removed or alleviated. When a diffraction grating (16) for compensating the difference between TE mode propagation constants and the difference between TM mode propagation constants of the first and second waveguides, or a diffraction grating having the wave number substantially equal to one of the sum of the TE mode propagation constants and the sum of the TM mode propagation constants of the first and second waveguides, is provided for common use in the first and second waveguides, an optical filter for extracting or eliminating a specific wavelength can be realized. Also a device for adding/dropping a specific wavelength can be realized. In any element, polarization dependency can be removed, or minimized, if any.
Abstract translation: 耦合波导结构包括紧密配置的第一和第二矩形波导（12,14）。 第一波导的纵横比基本上与第二波导的纵横比成反比。 结果，TE模传播常数与TM模传播常数之间的大小关系在第一波导和第二波导之间是相反的，这使得更容易均衡TE模耦合和TM模耦合的耦合条件 。 因此，可以消除或减轻极化依赖性。 当用于补偿TE模式传播常数之间的差异和第一和第二波导的TM模式传播常数之间的差异的衍射光栅（16）或具有基本上等于TE模式之和之和的波数的衍射光栅 传播常数和第一和第二波导的TM模式传播常数的和被提供用于第一和第二波导中的共同使用，可以实现用于提取或消除特定波长的滤光器。 也可以实现用于添加/删除特定波长的装置。 在任何元素中，极化依赖性可以被去除或最小化（如果有的话）。
-
公开(公告)号：EP0886151A2
公开(公告)日：1998-12-23
申请号：EP98110204.9
申请日：1998-06-04
Applicant: KOKUSAI DENSHIN DENWA CO., LTD
Inventor： Utaka, Katsuyuki , Tanaka, Shinsuke c/o Kokusai , Horita, Masayoshi, c/o Kokusai , Matsushima, Yuichi c/o Kokusai
CPC classification number: G02F1/3132 , G02B6/12007 , G02B2006/12107 , G02B2006/12147 , G02F2201/305
Abstract: The coupled waveguide structure comprise first and second rectangular waveguides (12,14), disposed closely. The aspect ratio of the first waveguide is substantially inverse in number to that of the second waveguide.
As a result, the magnitude relation between the TE mode propagation constant and the TM mode propagation constant is opposite between the first waveguide and the second waveguide, and this makes it easier to equalize the coupling conditions for the TE mode coupling and the TM mode coupling. Therefore, polarization dependency can be removed or alleviated.
When a diffraction grating (16) for compensating the difference between TE mode propagation constants and the difference between TM mode propagation constants of the first and second waveguides, or a diffraction grating having the wave number substantially equal to one of the sum of the TE mode propagation constants and the sum of the TM mode propagation constants of the first and second waveguides, is provided for common use in the first and second waveguides, an optical filter for extracting or eliminating a specific wavelength can be realized.
Also a device for adding/dropping a specific wavelength can be realized. In any element, polarization dependency can be removed, or minimized, if any.-
公开(公告)号：EP0583150B1
公开(公告)日：1998-05-06
申请号：EP93306299.4
申请日：1993-08-10
Applicant: SHARP KABUSHIKI KAISHA
Inventor： May, Paul , Ezra, David , Woodgate, Graham John
IPC: G02F1/1335
CPC classification number: G02F1/133621 , G02F2201/305 , G02F2203/22
-
公开(公告)号：EP0757806A1
公开(公告)日：1997-02-12
申请号：EP96901943.0
申请日：1996-02-27
Applicant: PHILIPS ELECTRONICS N.V.
Inventor： HIKMET, Rifat, Ata, Mustafa
IPC: G02F1
CPC classification number: G02F1/29 , G02F1/01 , G02F1/141 , G02F2201/305
Abstract: Switchable electro-optic medium (2) between two substrates (3, 4) at least one of which carries a grating structure (7, 8) at the side of the electro-optic medium, which grating structure has refractive indices which are substantially identical to those of the medium in the non-isotropic state. In the isotropic state diffraction occurs at the grating structure due to a difference in refractive index so that the central beam (11) decreases in intensity. Based on this principle, light shutters for, for example projection displays but also beam splitters, colour selectors and beam deflectors may be realized.
-
-
-
-
-
-
-
-
-
Search Results
909
records
(took 0.119 seconds)
