公开(公告)号：US20040263772A1

公开(公告)日：2004-12-30

申请号：US10609115

申请日：2003-06-27

Applicant: Kent State University

Inventor： James T. Gleeson ,  Joshua S. Martin

IPC: G02F001/13

CPC classification number: G02F1/13743 ,  G02F2201/305

Abstract: A method for producing a diffraction grating is provided. First, a mixture including nematic liquid crystal, dopant, and polymerizable precursor is introduced between two electrically conductive substrates having alignment layers for inducing orientation of the liquid crystal director. A potential difference is applied across the liquid crystal to cause a spontaneous self-assembly of the liquid crystal into an array of convective rolls. Thereafter, the roll structure is stabilized by the creation of a polymeric network through polymerization and/or cross-linking of the polymerizable precursor. The convective roll structure serves as a template for the formation of the polymeric network.

Abstract translation: 提供了衍射光栅的制造方法。 首先，将具有向列液晶，掺杂剂和可聚合前体的混合物引入具有用于引导液晶导向体的取向的取向层的两个导电基板之间。 在液晶上施加电位差，使液晶自发自组装成对流辊阵列。 此后，通过聚合和/或交联可聚合前体产生聚合物网络来使辊结构稳定。 对流辊结构用作形成聚合物网络的模板。

公开(公告)号：US20040174473A1

公开(公告)日：2004-09-09

申请号：US10379384

申请日：2003-03-03

Inventor： Shanti A. Cavanaugh ,  Lindsay W. Austin ,  Mark E. Young ,  Louis J. Molinari

IPC: G02F001/1335

CPC classification number: G02F1/31 ,  G02F1/093 ,  G02F1/1326 ,  G02F1/133382 ,  G02F1/133528 ,  G02F1/1339 ,  G02F2001/133521 ,  G02F2001/13355 ,  G02F2201/305 ,  G02F2203/055 ,  G02F2203/06 ,  G02F2203/12

Abstract: A twisted nematic liquid crystal variable optical attenuator is presented with one substrate that includes a integrated subwavelength nanostructured polarizer. The device may incorporate an integrated isolator whereby a substrate of the liquid crystal sandwich is formed from doped garnet to comprise a faraday rotator etched with a subwavelenth optical nanostructured polarizing grating and enabling the substrate to function as an isolator. The liquid crystal variable optical attenuator may include a deposited metal gasket moisture barrier bonding the opposing top and bottom substrates each having a spacer layer to accurately control cell gap thickness. The liquid crystal variable optical attenuator may also include an integrated thermal sensor and heater deposition layer sandwiched between or deposited on at least one or both opposing substrates.

Abstract translation: 呈现扭曲向列型液晶可变光衰减器，其中包括一个集成的亚波长纳米结构偏振器的基片。 该装置可以包括集成隔离器，由此由掺杂的石榴石形成液晶夹层的衬底，以包括用次级光学纳米结构偏振光栅蚀刻的法拉第旋转器，并使衬底能够用作隔离器。 液晶可变光衰减器可以包括沉积的金属垫片防潮层，其粘合相对的顶部和底部基底，每个具有间隔层以精确地控制细胞间隙厚度。 液晶可变光衰减器还可以包括夹在或沉积在至少一个或两个相对的基板上的集成热传感器和加热器沉积层。

公开(公告)号：US06618183B2

公开(公告)日：2003-09-09

申请号：US10021326

申请日：2001-10-30

Applicant: Joerg-Achim Fischer ,  Axel Gebhardt ,  Peter Ressel

Inventor： Joerg-Achim Fischer ,  Axel Gebhardt ,  Peter Ressel

IPC: G02F111

CPC classification number: G02F1/292 ,  G02F2201/16 ,  G02F2201/305 ,  G02F2203/06 ,  G02F2203/48

Abstract: The method and apparatus for amplitude modulation of unpolarized light by at least one Bragg modulator on the basis of domain-invertible material, the unpolarized light is modulated by a first Bragg modulator both for defining a polarization plane in the unpolarized light and for modulating a light part to be allocated to the polarization plane. A second Bragg modulator is provided which modulates the light part of the unpolarized light allocated to the polarization plane orthogonal to the polarization plane of the first Bragg modulator. The method and apparatus are particularly useful for recording a product to be printed, such as for manufacturing printing forms.

公开(公告)号：US20030137719A1

公开(公告)日：2003-07-24

申请号：US10052625

申请日：2002-01-18

Inventor： Wytze Eeuwke Van Der Veer

IPC: G02F001/39 ,  G02F001/35

CPC classification number: G02F1/39 ,  G02F2201/16 ,  G02F2201/305

Abstract: A synchronously pumped optical parametric oscillator generates pulses with duration 25 ps and repetition rate of 10 Hz. The bandwidth of the radiation is 1.36 cmnull1, close to the Fourier limit. A single pulse from each oscillator is further amplified with an optical parametric amplifier obtaining pulse energies up to 3.7 mJ. This source can be tuned between 410 nm-2000 nm. The system is not a laser but an optical parametric oscillator where amplification is obtained in a parametric process rather than by population inversion. The oscillator is pumped by a pulse train from a Nd: Yag laser. In each roundtrip the bandwidth of the radiation is reduced by a grating-mirror assembly. After a number of roundtrips a close to ideal pulse is obtained. This single pulse is then amplified by an optical parametric amplifier obtaining a single tunable narrow bandwidth pulse with a duration of about 25 ps.

Abstract translation: 同步泵浦的光参量振荡器产生持续时间为25ps且重复频率为10Hz的脉冲。 辐射带宽为1.36 cm-1，接近傅立叶极限。 来自每个振荡器的单个脉冲进一步用光学参量放大器进行放大，获得高达3.7mJ的脉冲能量。 该源可以在410nm-2000nm之间调谐。 该系统不是激光器，而是光参量振荡器，其中在参数过程中获得放大，而不是通过群体反演。 振荡器由Nd：Yag激光器的脉冲串泵浦。 在每个往返中，辐射的带宽由光栅镜组件减小。 经过多次往返，可以获得接近理想脉冲的距离。 然后通过光学参数放大器放大该单个脉冲，获得具有约25ps持续时间的单个可调窄带宽脉冲。

公开(公告)号：US20030063856A1

公开(公告)日：2003-04-03

申请号：US09970344

申请日：2001-10-03

Inventor： Yakov Sidorin ,  Tong Xie ,  Ralph Henry Page ,  Falgun Patel

IPC: G02B006/34

CPC classification number: G02B6/12007 ,  G02B6/124 ,  G02B2006/12107 ,  G02F1/035 ,  G02F2201/305 ,  G02F2202/13

Abstract: An integrated-optic device comprising a photorefractive substrate, an optical waveguide channel and at least one diffractive Bragg grating integrated in the substrate and intersecting the optical waveguide channel. The diffractive Bragg grating(s) causes at least a fraction of light coupled into the optical waveguide channel to be coupled out of the optical waveguide channel.

Abstract translation: 一种包括光折射基板，光波导通道和集成在基板中并与光波导通道相交的至少一个衍射布拉格光栅的集成光学器件。 衍射布拉格光栅使得耦合到光波导通道中的光的至少一部分光耦合到光波导通道外。

公开(公告)号：US20030063831A1

公开(公告)日：2003-04-03

申请号：US09970343

申请日：2001-10-03

Inventor： Tong Xie ,  Yakov Sidorin ,  Falgun Patel ,  Ralph Henry Page

IPC: G02F001/295 ,  G02B006/12 ,  G02B006/34

CPC classification number: G02F1/035 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/122 ,  G02B6/266 ,  G02B2006/12107 ,  G02B2006/12164 ,  G02F2201/305 ,  G02F2203/055 ,  G02F2203/48 ,  G02F2203/585

Abstract: An integrated-optic attenuator/equalizer device comprising a photorefractive substrate, at least one optical waveguide channel formed in the substrate, at least one diffractive-Bragg grating formed in the substrate, and a diffractive-Bragg grating modulator that is capable of modulating the diffractive Bragg grating(s). The diffractive-Bragg grating(s) intersects the optical waveguide channel. When a diffractive-Bragg grating formed in the substrate is modulated, at least a fraction of light of a wavelength associated with the modulated diffractive-Bragg grating is re-directed by the modulated diffractive-Bragg grating, thereby preventing the re-directed fraction of light from arriving at the output of the optical waveguide channel. Multiple diffractive-Bragg gratings may be implemented in the integrated-optic device, each having a particular wavelength associated therewith, and the diffractive-Bragg gratings may be simultaneously or independently modulated to control the fractions of light of different wavelengths that arrive at the output of the optical waveguide channel.

Abstract translation: 一种集成光衰减器/均衡器装置，包括光折射基板，形成在基板中的至少一个光波导通道，形成在基板中的至少一个衍射 - 布拉格光栅，以及能够调制衍射的衍射 - 布拉格光栅调制器 布拉格光栅（s）。 衍射 - 布拉格光栅与光波导通道相交。 当在衬底中形成的衍射 - 布拉格光栅被调制时，与调制的衍射 - 布拉格光栅相关联的至少一部分波长的光被调制的衍射 - 布拉格光栅重新导向，从而防止了 光到达光波导通道的输出。 多个衍射 - 布拉格光栅可以在集成光学器件中实现，每个具有与其相关联的特定波长，并且衍射 - 布拉格光栅可以被同时或独立地调制以控制到达输出的不同波长的光的分数 光波导通道。

公开(公告)号：US06525847B2

公开(公告)日：2003-02-25

申请号：US09768088

申请日：2001-01-23

Applicant: Milan M. Popovich ,  Jonathan D. Waldern

Inventor： Milan M. Popovich ,  Jonathan D. Waldern

IPC: G02B532

CPC classification number: G02B5/32 ,  G02B27/2278 ,  G02F1/1334 ,  G02F1/13342 ,  G02F2201/305

Abstract: Switchable holographic optical elements (HOEs) can used in systems and methods for projecting three-dimensional images, or for projecting two-dimensional tiled images with increased size and/or resolution. One of the methods may include sequentially displaying first, second, and third color components of a first two-dimensional image at an object plane. The first two dimensional image represents a first slice of a three-dimensional image. As the first, second, and third color components are displayed, first, second and third HOEs may be activated so that the activated first switchable HOE focuses the first color component of the first two-dimensional image onto a first image plane, the activated second switchable HOE focuses the second color component of the first two-dimensional image onto the first image plane, and the wherein the activated third switchable HOE focuses the third color component of the first two-dimensional image onto the first image plane. It is noted that the first, second, and third HOEs may be activated concurrently or sequentially with the display of the first, second, or third color components of the first two-dimensional image. After the first, second, and third color components are displayed, the first, second and third switchable HOEs are deactivated. Then, first, second, and third color components of a second two-dimensional image are sequentially displayed. The second two-dimensional image represents a second slice of the three-dimensional image. A fourth switchable HOE may be activated to focus the first color component of the second two-dimensional image onto a second image plane. The second image plane is adjacent to the first image plane.

Abstract translation: 可切换全息光学元件（HOE）可用于投影三维图像的系统和方法，或用于投影尺寸和/或分辨率增大的二维平铺图像。 方法之一可以包括在物平面处顺序地显示第一二维图像的第一，第二和第三颜色分量。 第一二维图像表示三维图像的第一切片。 当显示第一，第二和第三颜色分量时，可以激活第一，第二和第三HOE，使得激活的第一可切换HOE将第一二维图像的第一颜色分量聚焦到第一图像平面上，激活的第二 可切换HOE将第一二维图像的第二颜色分量聚焦到第一图像平面上，其中激活的第三可切换HOE将第一二维图像的第三颜色分量聚焦到第一图像平面上。 注意，第一，第二和第三HOE可以与第一二维图像的第一，第二或第三颜色分量的显示同时或顺序地激活。 在显示第一，第二和第三颜色分量之后，第一，第二和第三可切换HOE被去激活。 然后，依次显示第二二维图像的第一，第二和第三颜色分量。 第二二维图像表示三维图像的第二切片。 可以激活第四可切换HOE以将第二二维图像的第一颜色分量聚焦到第二图像平面上。 第二图像平面与第一图像平面相邻。

公开(公告)号：US06359719B1

公开(公告)日：2002-03-19

申请号：US09362372

申请日：1999-07-28

Applicant: Yuichiro Ori

Inventor： Yuichiro Ori

IPC: G02F103

CPC classification number: G02B3/005 ,  G02B5/1885 ,  G02B5/201 ,  G02B27/1086 ,  G02F1/133504 ,  G02F1/133526 ,  G02F1/133553 ,  G02F2201/305 ,  G02F2203/34 ,  G03H1/0248 ,  G03H1/04 ,  G03H2001/0415 ,  G03H2001/0434 ,  G03H2001/0439 ,  G03H2001/2271

Abstract: An optical modulator has a spectral means for diffracting white illumination light into light of predetermined wavelength bands, a liquid crystal layer for modulating the intensity of the light entering a plurality of two-dimensional pixels, a condensing means for condensing the light spectrally diffracted by the spectral means so as to direct the light to each pixel of the liquid crystal layer, and a reflecting means for reflecting the light that passes through the liquid crystal layer in approximately the same direction as the entering light.

Abstract translation: 光调制器具有用于将白色照明光衍射为预定波长带的光的光谱装置，用于调制进入多个二维像素的光的强度的液晶层，用于将由 光束装置，以将光引导到液晶层的每个像素;以及反射装置，用于反射与入射光大致相同的方向通过液晶层的光。

公开(公告)号：US20020009251A1

公开(公告)日：2002-01-24

申请号：US09822752

申请日：2001-03-30

Inventor： Dale M. Byrne

IPC: G02F001/03

CPC classification number: G02F1/0316 ,  G02F2201/122 ,  G02F2201/305 ,  G02F2203/055

Abstract: The present invention provides configurations for an electro-optically tunable filter. The filter includes an electro-optical crystal, at least one electrically conductive mesh screen, at least one electrode and a voltage source. In one embodiment, an electrical voltage passes from a source to a mesh screen contacting the crystal, through the crystal and an electrode on the crystal's opposite end. The mesh screen creates a narrow bandpass. The optical properties of the mesh screen-crystal combination are determined partially by the refractive index of the crystal when a voltage is applied to the mesh screen. Variable voltages change the refractive index of the crystal, creating varying spectral positions of the filter. Application of a voltage between the mesh screen and the electrode creates a field internal to the crystal that changes its refractive index, allowing it to be tunable in the bandpass location thereby affecting a passing light signal.

Abstract translation: 本发明提供了一种电光可调谐滤波器的配置。 滤光器包括电光晶体，至少一个导电网格屏幕，至少一个电极和电压源。 在一个实施例中，电压从源极传递到与晶体接触的筛网，通过晶体和晶体相对端上的电极。 网格画面创建一个窄带通。 网状屏幕 - 晶体组合的光学特性部分地由将电压施加到网眼屏幕时的晶体的折射率确定。 可变电压改变了晶体的折射率，产生了滤光片的变化光谱位置。 在网筛和电极之间施加电压产生晶体内部的场，其改变其折射率，允许其在带通位置可调谐，从而影响通过的光信号。

公开(公告)号：US5991083A

公开(公告)日：1999-11-23

申请号：US59252

申请日：1998-04-14

Applicant: Yoshiki Shirochi

Inventor： Yoshiki Shirochi

IPC: G09F9/00 ,  G02B27/00 ,  G02B27/14 ,  G02F1/1335 ,  G02F1/13357 ,  H04N9/31 ,  G02B27/10 ,  G02F1/295

CPC classification number: H04N9/3108 ,  G02B27/1053 ,  G02B27/148 ,  G02F1/133504 ,  G02F1/133621 ,  G02B5/0252 ,  G02F1/133526 ,  G02F2001/133623 ,  G02F2201/305

Abstract: An image display apparatus capable of displaying a clear image without a prominent vacancy between pixels, even when a luminance distribution is present within each of the pixels, has a display device for displaying a plurality of pixels, each having a luminance distribution and an optical element for diffusing each of the pixels displayed by the display device so that each of the pixels has a plurality of peaks in the luminance distribution.

Abstract translation: 即使在每个像素内存在亮度分布的情况下，即使在每个像素内存在亮度分布，也能够显示清晰的图像而不会在像素之间没有明显的空位的图像显示装置具有显示装置，用于显示各自具有亮度分布的多个像素和光学元件 用于扩散由显示装置显示的每个像素，使得每个像素在亮度分布中具有多个峰。