公开(公告)号：WO2007096932A2

公开(公告)日：2007-08-30

申请号：PCT/IT2007000136

申请日：2007-02-26

Applicant: UNIV CALABRIA ,  UMETON CESARE ,  DE LUCA ANTONIO ,  DE SIO LUCIANO ,  VELTRI ALESSANDRO ,  CAPUTO ROBERTO ,  SUKHO ANDREY

Inventor： UMETON CESARE ,  DE LUCA ANTONIO ,  DE SIO LUCIANO ,  VELTRI ALESSANDRO ,  CAPUTO ROBERTO ,  SUKHO ANDREY

CPC classification number: G02B5/32 ,  G02B5/1857 ,  G02B5/1861 ,  G02B27/42 ,  G03H1/0486 ,  G03H2001/0264 ,  G03H2001/0482 ,  G03H2001/0489 ,  G03H2001/0491 ,  G03H2222/15 ,  G03H2250/38

Abstract: System of local control and stabilization of a device for the writing of holografic gratings in composite liquid crystal materials by means of interference figure generated by two components, defracted and reflected, of a UV laser beam. This beam falls on a semireflecting mirror (5), which two components are reflected from two mirrors (6,7) one of which is piezoelectrical and falls on a sample container (8) on which a sample grating (16) and a grating to be realized (17) are placed. This latter is characterized by the fact that a ramp tension is sent to the piezoelectrical mirror (6*) which produces a difference of optical path between the two arms (20,21) of the interferometer; that by means of an acquisition card placed on a standard personal computer, and through the photodetector (15), the reference signal produced by the sample grating (16) is acquired; that the first acquired value is chosen as set -point, that is the value at which the reference signal is stabilized; that the 'subsequent reference values revealed are acquired; that if the error signal (that is the difference between the set -point and the subsequent reference values) is zero the system is stable and does not execute any operation; that if the error signal is different from zero the personal computer sends to the piezoelectrical mirror (6*) a correction tension.

Abstract translation: 用于通过UV激光束的两个分量产生的干涉图来折射和反射的用于在复合液晶材料中写入全光栅的装置的局部控制和稳定系统。 该光束落在半反射镜（5）上，该两个分量由两个反射镜（6,7）反射，其中一个反射镜被压电，并落在样品容器（8）上，样品光栅（16）和光栅 被实现（17）被放置。 后者的特征在于，向压电反射镜（6 *）发送斜坡张力，其产生干涉仪的两个臂（20,21）之间的光路差; 通过放置在标准个人计算机上的采集卡，并且通过光电检测器（15），获取由采样光栅（16）产生的参考信号; 选择第一获取值作为设定点，即参考信号稳定的值; “随后的参考值被揭示是获得的; 如果错误信号（即设定点和后续参考值之间的差值）为零，则系统是稳定的，不执行任何操作; 如果误差信号与零不同，则个人计算机向压电镜（6 *）发送校正张力。

公开(公告)号：WO1994012913A1

公开(公告)日：1994-06-09

申请号：PCT/US1993011501

申请日：1993-11-26

Applicant: VOXEL ,  HART, Stephen, J.

Inventor： VOXEL

IPC: G03H01/26

CPC classification number: G02B5/203 ,  G02B5/32 ,  G03H1/0248 ,  G03H1/0486 ,  G03H1/181 ,  G03H1/22 ,  G03H1/24 ,  G03H1/28 ,  G03H2001/0489 ,  G03H2001/0491 ,  G03H2001/0833 ,  G03H2001/186 ,  G03H2001/2278 ,  G03H2001/2655 ,  G03H2210/22 ,  G03H2210/33 ,  G03H2210/454 ,  G03H2210/46 ,  G03H2227/06 ,  G03H2260/16

Abstract: A method and apparatus (300) for making holograms includes a technique for exposing a film substrate (319) or other light sensitive medium to consecutive two-dimensional images, together representative of a three-dimensional system, to generate a three-dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate (319). Each image is relatively weak, but the combination of the series of weak images ultimatly appears as a single clearly defined hologram.

Abstract translation: 一种用于制造全息图的方法和装置（300）包括用于将代表三维系统的胶片基底（319）或其它光敏介质暴露于连续的二维图像的技术，以产生三维全息图 物理系统。 采用低光束比率在基片（319）上叠加多（20-300）像。 每个图像相对较弱，但是一系列弱图像的组合最终显示为单个明确定义的全息图。

公开(公告)号：WO1991001517A1

公开(公告)日：1991-02-07

申请号：PCT/US1990004028

申请日：1990-07-18

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： MASSACHUSETTS INSTITUTE OF TECHNOLOGY ,  ANDERSON, Erik, Hyde ,  SMITH, Henry, I. ,  SCHATTENBURG, Mark, Lee

IPC: G03H01/10

CPC classification number: G03F7/70408 ,  G03F7/001 ,  G03H1/0248 ,  G03H2001/0489

Abstract: First and second coherent beams illuminate a common area on an exposure station (17). A phase detector, comprising left and right photodiodes (26), senses the relative phase between the first and second beams (31 and 32) to provide a control signal. There is at least one phase shifter (19) in the path of at least one of the coherent beams (31 and 32). The control signal is coupled to the phase shifter (19) to adjust the phase imparted thereby so that the relative phase between the first and second coherent beams (31 and 32) is substantially constant.

Abstract translation: 第一和第二相干光束照射曝光站（17）上的公共区域。 包括左和右光电二极管（26）的相位检测器感测第一和第二光束（31和32）之间的相对相位，以提供控制信号。 至少一个相干光束（31和32）的路径中至少有一个移相器（19）。 控制信号耦合到移相器（19）以调节由此赋予的相位，使得第一和第二相干光束（31和32）之间的相对相位基本上恒定。

公开(公告)号：WO2015187185A1

公开(公告)日：2015-12-10

申请号：PCT/US2014/041438

申请日：2014-06-07

Applicant: TAKASHIMA, Yuzuru ,  SHIMADA, Kenichi

Inventor： TAKASHIMA, Yuzuru ,  SHIMADA, Kenichi

IPC: G03H1/10 ,  G02F1/01

CPC classification number: G03H1/14 ,  G02B26/0816 ,  G03H1/0486 ,  G03H1/2286 ,  G03H2001/0489 ,  G03H2222/42 ,  G03H2223/24 ,  G03H2226/02 ,  G11B7/0065 ,  G11B7/08564 ,  G11B7/126 ,  G11B7/1362 ,  G11B7/1369

Abstract: An optical information recording/reproducing apparatus and method thereof which compensate for the effect of mechanical instability on holographic data storage. A time dependent deviation profile of an optical beam during recording is determined. The time dependent deviation profile is related to a phase profile to be applied to a reference beam during recording or reproduction of a hologram, and the related phase profile is applied to the reference beam during recording or reproduction of the hologram.

Abstract translation: 一种补偿机械不稳定性对全息数据存储的影响的光信息记录/再现装置及其方法。 确定记录期间光束的时间相关偏差曲线。 时间相关偏差曲线与在全息图的记录或再现期间应用于参考光束的相位曲线相关，并且在记录或再现全息图期间将相关的相位曲线应用于参考光束。

公开(公告)号：WO2013190257A1

公开(公告)日：2013-12-27

申请号：PCT/GB2013/000273

申请日：2013-06-17

Applicant: POPOVICH, Milan, Momcilo ,  WALDERN, Jonathan, David

Inventor： POPOVICH, Milan, Momcilo ,  WALDERN, Jonathan, David

IPC: G03H1/20 ,  G03H1/22 ,  G02F1/1334

CPC classification number: G03H1/20 ,  G02F1/13342 ,  G03H1/0256 ,  G03H1/202 ,  G03H1/22 ,  G03H1/30 ,  G03H2001/0489 ,  G03H2001/205 ,  G03H2240/52 ,  G03H2260/12 ,  G03H2260/33

Abstract: A holographic recording apparatus comprises: a source of illumination (2); a master hologram (1) containing at least one hologram lamina (20) overlaying; a copy substrate (50) containing a holographic recording medium; and a voltage generator (40) for applied a voltage across at least one of said master hologram and said copy substrate. The master hologram diffracts the illumination light (100) into zero order light (102, 104) and diffracted light (101, 103) which interfere in the copy substrate to form a copy of the master hologram. The source of illumination is applied for a predefined exposure time during which the voltage varies the refractive index modulation of at least one of the master hologram and the copy hologram.

Abstract translation: 全息记录装置包括：照明源（2）; 包含至少一个重叠的全息图层（20）的主全息图（1）; 包含全息记录介质的复印基板（50） 以及电压发生器（40），用于在所述主全息图和所述复制衬底中的至少一个上施加电压。 主全息图将照明光（100）衍射成零级光（102,104）和衍射光（101,103），其干涉复印基板以形成主全息图的副本。 施加照明源以预定的曝光时间，在该预定曝光时间期间，电压改变主全息图和复制全息图中的至少一个的折射率调制。