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1. 发明授权

US08134771B2 Spatial light modulators with changeable phase masks for use in holographic data storage 有权
标题翻译：具有用于全息数据存储的可变相位掩模的空间光调制器
公开(公告)号：US08134771B2
公开(公告)日：2012-03-13
申请号：US12770444
申请日：2010-04-29
申请人： Mark A. Handschy , Michael J. O'Callaghan
发明人： Mark A. Handschy , Michael J. O'Callaghan
IPC分类号： G02F1/01 , G02B26/00 , G03H1/12
CPC分类号： G03H1/16 , G03H1/02 , G03H2001/0224 , G03H2001/261 , G03H2210/22 , G03H2223/13 , G03H2225/22 , G03H2225/24 , G03H2225/33 , G03H2225/34 , G03H2225/55 , G11B7/0065 , G11B7/128 , G11B7/1362 , G11B7/1369 , G11C13/042
摘要： A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can be changed over time in a random, pseudo-random, or predetermined fashion. The spatial light modulator and phase mask can be implemented in a liquid crystal SLM (nematic, ferroeleletric, or other), in a DMD SLM, in a magneto-optical SLM, or in any other suitable manner.
摘要翻译：一种全息数据存储系统，其包括写入头，该写入头包括像素化的空间光调制器和根据光通过的相位掩模中的位置来改变相位的分离或积分相位掩模。可以随机，伪随机或预定方式随时间改变相位变化。空间光调制器和相位掩模可以在DMD SLM，磁光SLM中以任何其它合适的方式在液晶SLM（向列，铁电或其它）中实现。

2. 发明授权

US07733557B2 Spatial light modulators with changeable phase masks for use in holographic data storage 有权
标题翻译：具有用于全息数据存储的可变相位掩模的空间光调制器
公开(公告)号：US07733557B2
公开(公告)日：2010-06-08
申请号：US11739642
申请日：2007-04-24
申请人： Mark A. Handschy , Michael J. O'Callaghan
发明人： Mark A. Handschy , Michael J. O'Callaghan
IPC分类号： G02F1/01 , G02B5/32 , G03H1/16 , G11B7/00
CPC分类号： G03H1/16 , G03H1/02 , G03H2001/0224 , G03H2001/261 , G03H2210/22 , G03H2223/13 , G03H2225/22 , G03H2225/24 , G03H2225/33 , G03H2225/34 , G03H2225/55 , G11B7/0065 , G11B7/128 , G11B7/1362 , G11B7/1369 , G11C13/042
摘要： A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can be changed over time in a random, pseudo-random, or predetermined fashion. The spatial light modulator and phase mask can be implemented in a liquid crystal SLM (nematic, ferroelectric, or other), in a DMD SLM, in a magneto-optical SLM, or in any other suitable manner.
摘要翻译：一种全息数据存储系统，其包括写入头，该写入头包括像素化的空间光调制器和根据光通过的相位掩模中的位置来改变相位的分离或积分相位掩模。可以随机，伪随机或预定方式随时间改变相位变化。空间光调制器和相位掩模可以在DMD SLM，磁光SLM中以任何其它合适的方式在液晶SLM（向列，铁电或其它）中实现。

3. 发明授权

US06580078B1 Ferroelectric liquid crystal infrared chopper 失效
标题翻译：铁电液晶红外线斩波器
公开(公告)号：US06580078B1
公开(公告)日：2003-06-17
申请号：US09828295
申请日：2001-04-06
申请人： Michael J. O'Callaghan , William N. Thurmes
发明人： Michael J. O'Callaghan , William N. Thurmes
IPC分类号： G02F1135
CPC分类号： G02F1/141 , G02F2001/133302
摘要： A liquid crystal infrared light chopper includes a polarizer that receives and polarizes incoming infrared light, a layer of ferroelectric liquid crystal material switchable between at least two states, a pair of IR transparent, conductive substrates positioned on either side of the liquid crystal layer and an analyzer that blocks IR light of one polarization state and passes IR light of an opposite polarization state. The liquid crystal layer acts on polarized IR light by changing its polarization if the liquid crystal is in a first state and by not changing its polarization if the liquid crystal is in a second state. Voltages applied to the conductive substrates drive the liquid crystal layer to one of the two states. The analyzer blocks IR light when the liquid crystal layer is in one of the states and passes IR light when the liquid crystal layer is in the second state.
摘要翻译：液晶红外光斩波器包括：接收和偏振入射红外光的偏振器，可在至少两种状态之间切换的铁电液晶材料层，位于液晶层两侧的一对IR透明导电基板和分析仪阻止一个极化状态的IR光并通过具有相反极化状态的IR光。如果液晶处于第一状态，则液晶层通过改变其偏振而作用于偏振IR光，如果液晶处于第二状态则液晶层不改变其偏振。施加到导电基底的电压将液晶层驱动到两种状态之一。当液晶层处于一种状态时，分析器阻挡IR光，并且当液晶层处于第二状态时通过IR光。

4. 发明授权

US5552916A Diffractive light modulator 失效
$Diffractive light modulator$
标题翻译：衍射光调制器
公开(公告)号：US5552916A
公开(公告)日：1996-09-03
申请号：US8764
申请日：1993-01-25
申请人： Michael J. O'Callaghan , Mark A. Handschy
发明人： Michael J. O'Callaghan , Mark A. Handschy
IPC分类号： G02F1/141 , G02F1/29 , G02F1/13
CPC分类号： G02F1/292 , G02F1/141 , G02F2201/124 , G02F2203/24
摘要： An arrangement (apparatus and method) for selectively modulating incident unpolarized light passing through a birefringent material, such as ferroelectric crystal. The apparatus includes a plate having one or more birefringent layers corresponding to first and second alignment regions. The birefringent layer corresponding to the first alignment region has a first optic axis selectably set in a first orientation and a second orientation. The birefringent layer corresponding to the second alignment region has a second optic axis selectably set in a third orientation and a fourth orientation. A switching means controls the optical axis states of the birefringent material by applying switching voltages to the areas of the birefringent layer. Light having passed through the birefringent layer at locations having the first orientation has a different phase from, and same polarization as, light having passed through locations with the third orientation, independent of a polarization state of the incident light. As a result, the birefringent material has a uniform state at locations where the corresponding optic axes between the first and second alignment regions are parallel, and a diffracting state produced by an interaction between the light having passed through areas having the first orientation and the light having passed through areas having the second orientation. The arrangement is effective for reflective modulators, multilayer modulators or polarization-preserving modulators, and has applications for intensity modulation, blurring modulation and beam steering.
摘要翻译：用于选择性地调制通过诸如铁电晶体的双折射材料的入射非偏振光的装置（装置和方法）。该装置包括具有对应于第一和第二对准区域的一个或多个双折射层的板。对应于第一对准区域的双折射层具有可选地设置在第一取向和第二取向的第一光轴。对应于第二对准区域的双折射层具有可选地设置在第三取向和第四取向的第二光轴。开关装置通过向双折射层的区域施加开关电压来控制双折射材料的光轴状态。在具有第一取向的位置处穿过双折射层的光与通过具有第三取向的位置的光具有不同的相位和相同的偏振，与入射光的偏振状态无关。结果，双折射材料在第一和第二对准区域之间的相应光轴平行的位置处具有均匀的状态，以及通过具有第一取向的光与光之间的相互作用产生的衍射状态已通过具有第二方向的区域。该装置对于反射调制器，多层调制器或偏振保存调制器是有效的，并且具有用于强度调制，模糊调制和波束转向的应用。

5. 发明申请

US20100296380A1 Spatial Light Modulators with Changeable Phase Masks for Use in Holographic Data Storage 有权
标题翻译：具有可变相位掩模的空间光调制器用于全息数据存储
公开(公告)号：US20100296380A1
公开(公告)日：2010-11-25
申请号：US12770444
申请日：2010-04-29
申请人： Mark A. Handschy , Michael J. O'Callaghan
发明人： Mark A. Handschy , Michael J. O'Callaghan
IPC分类号： G11B7/00 , G02F1/01
CPC分类号： G03H1/16 , G03H1/02 , G03H2001/0224 , G03H2001/261 , G03H2210/22 , G03H2223/13 , G03H2225/22 , G03H2225/24 , G03H2225/33 , G03H2225/34 , G03H2225/55 , G11B7/0065 , G11B7/128 , G11B7/1362 , G11B7/1369 , G11C13/042
摘要： A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can be changed over time in a random, pseudo-random, or predetermined fashion. The spatial light modulator and phase mask can be implemented in a liquid crystal SLM (nematic, ferroeleletric, or other), in a DMD SLM, in a magneto-optical SLM, or in any other suitable manner.
摘要翻译：一种全息数据存储系统，其包括写入头，该写入头包括像素化的空间光调制器和根据光通过的相位掩模中的位置来改变相位的分离或积分相位掩模。可以随机，伪随机或预定方式随时间改变相位变化。空间光调制器和相位掩模可以在DMD SLM，磁光SLM中以任何其它合适的方式在液晶SLM（向列，铁电或其它）中实现。

6. 发明授权

US06525709B1 Miniature display apparatus and method 失效
标题翻译：微型显示装置及方法
公开(公告)号：US06525709B1
公开(公告)日：2003-02-25
申请号：US08953613
申请日：1997-10-17
申请人： Michael J. O'Callaghan
发明人： Michael J. O'Callaghan
IPC分类号： G09G336
CPC分类号： G09G3/2011 , G09G3/3614 , G09G3/3648 , G09G2300/0809 , G09G2310/0259
摘要： A display system includes a spatial light modulator having an array of individually controlled pixels switchable between a first and a second state for producing modulated light having gray scale during a given period of time. The system generates a reference signal that varies in a predetermined way during the given period of time. The system also generates analog pixel image signals associated with each of the pixels for the given period of time. The analog pixel image signal representing a desired gray scale level for each associated pixel during the given period of time. Each of the pixels includes an arrangement for receiving the reference signal and an arrangement for receiving the analog pixel image signal associated with that pixel. A comparator within each pixel compares the reference signal and the analog pixel image signal associated with that pixel and outputs a signal for switching the pixel between the first and the second state when the reference signal reaches a predetermined level relative to the analog pixel image signal. In a display system that uses a light modulating medium that requires DC-field balancing, the pixel may further include an inverter arrangement for inverting the output of the comparator for purposes of DC-field balancing.
摘要翻译：显示系统包括空间光调制器，该空间光调制器具有可在第一和第二状态之间切换的独立控制像素的阵列，用于在给定的时间段内产生具有灰度级的调制光。该系统产生在给定时间段内以预定方式变化的参考信号。该系统还在给定的时间段内生成与每个像素相关联的模拟像素图像信号。模拟像素图像信号表示在给定时间段期间每个相关联像素的期望灰度级。每个像素包括用于接收参考信号的装置和用于接收与该像素相关联的模拟像素图像信号的装置。每个像素内的比较器比较参考信号和与该像素相关联的模拟像素图像信号，并且当参考信号相对于模拟像素图像信号达到预定水平时，输出用于在第一和第二状态之间切换像素的信号。在使用需要DC场平衡的光调制介质的显示系统中，像素可以进一步包括用于使直流场平衡的目的反相比较器的输出的反相器装置。

7. 发明授权

US06369933B1 Optical correlator having multiple active components formed on a single integrated circuit 失效
标题翻译：具有形成在单个集成电路上的多个有源元件的光学相关器
公开(公告)号：US06369933B1
公开(公告)日：2002-04-09
申请号：US09542554
申请日：2000-04-03
申请人： Michael J. O'Callaghan
发明人： Michael J. O'Callaghan
IPC分类号： G02F103
CPC分类号： G06E3/005
摘要： An optical correlator includes a first reflective mode spatial light modulator for inputting an input image and a second reflective mode spatial light modulator for inputting a reference image for comparing with the input image. The optical correlator also includes an optics arrangement for (i) directing light into the first spatial light modulator, (ii) directing light along a first optical path from the first spatial light modulator into the second spatial light modulator, and (iii) directing light along a second optical path from the second spatial light modulator into an image plane. The optics arrangement includes a first lens having a focal length f1 and a second lens having a focal length f2. The first lens is positioned substantially adjacent the first spatial light modulator and the second lens is positioned substantially adjacent the second spatial light modulator. In one aspect of the invention, the spatial light modulators have their individual respective backplanes formed as two separate portions of a single integrated circuit die. In another aspect of the invention, the optics arrangement is configured such that the optical correlator does not need to be configured as a 2f optical correlator with the length of the first optical path from the first lens to the second spatial light modulator being substantially equal to the length of the second optical path from the second lens to the image plane.
摘要翻译：光学相关器包括用于输入输入图像的第一反射模式空间光调制器和用于输入用于与输入图像进行比较的参考图像的第二反射模式空间光调制器。光学相关器还包括光学装置，用于（i）将光引导到第一空间光调制器中，（ii）将光沿着从第一空间光调制器进入第二空间光调制器的第一光路引导，以及（iii）引导光沿着从第二空间光调制器到图像平面的第二光路。光学装置包括具有焦距f1的第一透镜和具有焦距f2的第二透镜。第一透镜基本上邻近第一空间光调制器定位，并且第二透镜基本上邻近第二空间光调制器定位。在本发明的一个方面，空间光调制器具有形成为单个集成电路管芯的两个独立部分的各自的各自的背板。在本发明的另一方面，光学配置被配置为使得光学相关器不需要被配置为2f光学相关器，其中从第一透镜到第二空间光调制器的第一光路的长度基本上等于从第二透镜到图像平面的第二光路的长度。

8. 发明授权

US08107344B2 Phase masks for use in holographic data storage 有权
标题翻译：用于全息数据存储的相位掩模
公开(公告)号：US08107344B2
公开(公告)日：2012-01-31
申请号：US12639821
申请日：2009-12-16
申请人： Mark A. Handschy , Michael J. O'Callaghan , Christopher M. Walker
发明人： Mark A. Handschy , Michael J. O'Callaghan , Christopher M. Walker
IPC分类号： G11B7/00
CPC分类号： G02F1/292 , G02F1/13363 , G02F2001/133565 , G03H1/02 , G03H1/16 , G03H2001/0224 , G03H2223/13 , G11B7/0065 , G11B7/128 , G11B7/1369
摘要： A spatial light modulator (SLM) having a phase mask that is provided as an internal component thereof. The phase mask can be provided as a multilevel surface of relatively higher index of refraction material on an inner surface of a transmissive cover window or as a separate transmissive window between the cover window and the pixels of the SLM. If the phase mask is to be used with a liquid crystal SLM, then it may be desirable to planarize the surface of the cover window contacting the liquid crystal by providing a layer of relatively lower index of refraction material adjacent the multilevel surface. The phase mask can also be provided on the transmissive cover window by patterned ion deposition, exposing patterned light to a photopolymeric material, or in some other suitable fashion. Arranging for the pixel electrodes to be at one of multiple levels rather than lying in an exactly planar relationship can also effectively create the phase mask.
摘要翻译：具有作为其内部部件提供的相位掩模的空间光调制器（SLM）。相位掩模可以被提供为在透射盖窗的内表面上的相对较高的折射率材料的多层表面，或者作为在窗口窗口和SLM的像素之间的单独透射窗口。如果相位掩模与液晶SLM一起使用，则可能需要通过提供相邻较低折射率材料层与多层表面相邻来平坦化与液晶接触的盖窗的表面。相位掩模也可以通过图案化离子沉积在透射覆盖窗口上提供，将图案化光曝光到光聚合物材料上，或以某种其它合适的方式。将像素电极排列成多个电平中的一个而不是处于精确的平面关系，也可以有效地产生相位掩模。

9. 发明授权

US06247037B1 Optical correlator having multiple active components formed on a single integrated circuit 失效
标题翻译：具有形成在单个集成电路上的多个有源元件的光学相关器
公开(公告)号：US06247037B1
公开(公告)日：2001-06-12
申请号：US09238311
申请日：1999-01-28
申请人： Michael J. O'Callaghan
发明人： Michael J. O'Callaghan
IPC分类号： G06E300
CPC分类号： G06E3/005
摘要： An optical correlator includes a compound electro-optical component having a first and a second reflective spatial light modulator for forming electro-optical patterns of light. Each spatial light modulator has a reflective backplane with the reflective backplanes of the spatial light modulators being substantially coplanar. The spatial light modulators having their individual respective backplanes formed as two separate portions of a single integrated circuit die. The optical correlator may also include an imager for imaging the output of the optical correlator that is substantially coplanar with the spatial light modulators. The compound electro-optical component may include at least a part of the imager that is formed as a separate portion of the single integrated circuit die that contains the backplanes of the two spatial light modulators.
摘要翻译：光学相关器包括具有用于形成光电图案的第一和第二反射空间光调制器的复合电光部件。每个空间光调制器具有反射背板，空间光调制器的反射背板基本上是共面的。空间光调制器具有各自的各自的背板，形成为单个集成电路管芯的两个分开的部分。光学相关器还可以包括用于对基本上与空间光调制器共面的光学相关器的输出成像的成像器。复合电光部件可以包括形成为包含两个空间光调制器的背板的单个集成电路管芯的单独部分的成像器的至少一部分。

10. 发明申请

US20100091631A1 PHASE MASKS FOR USE IN HOLOGRAPHIC DATA STORAGE 有权
标题翻译：相位掩码用于全息数据存储
公开(公告)号：US20100091631A1
公开(公告)日：2010-04-15
申请号：US12639821
申请日：2009-12-16
申请人： Mark A. Handschy , Michael J. O'Callaghan , Christopher M. Walker
发明人： Mark A. Handschy , Michael J. O'Callaghan , Christopher M. Walker
IPC分类号： G11B7/00
CPC分类号： G02F1/292 , G02F1/13363 , G02F2001/133565 , G03H1/02 , G03H1/16 , G03H2001/0224 , G03H2223/13 , G11B7/0065 , G11B7/128 , G11B7/1369
摘要： A spatial light modulator (SLM) having a phase mask that is provided as an internal component thereof. The phase mask can be provided as a multilevel surface of relatively higher index of refraction material on an inner surface of a transmissive cover window or as a separate transmissive window between the cover window and the pixels of the SLM. If the phase mask is to be used with a liquid crystal SLM, then it may be desirable to planarize the surface of the cover window contacting the liquid crystal by providing a layer of relatively lower index of refraction material adjacent the multilevel surface. The phase mask can also be provided on the transmissive cover window by patterned ion deposition, exposing patterned light to a photopolymeric material, or in some other suitable fashion. Arranging for the pixel electrodes to be at one of multiple levels rather than lying in an exactly planar relationship can also effectively create the phase mask.
摘要翻译：具有作为其内部部件提供的相位掩模的空间光调制器（SLM）。相位掩模可以被提供为在透射盖窗的内表面上的相对较高的折射率材料的多层表面，或者作为在窗口窗口和SLM的像素之间的单独透射窗口。如果相位掩模与液晶SLM一起使用，则可能需要通过提供相邻较低折射率材料层与多层表面相邻来平坦化与液晶接触的盖窗的表面。相位掩模也可以通过图案化离子沉积在透射覆盖窗口上提供，将图案化光曝光到光聚合物材料上，或以某种其它合适的方式。将像素电极排列成多个电平中的一个而不是处于精确的平面关系，也可以有效地产生相位掩模。

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