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1.发明授权
公开(公告)号：US4018509A
公开(公告)日：1977-04-19
申请号：US664777
申请日：1976-03-08
摘要： There is disclosed a high performance coherent optical data processing system using a reflective mode liquid crystal light valve which is particularly suited for application to real-time coherent optical data processing. A preferred example of the system uses a reflective light valve comprising a CdS photoconductor, a CdTe light absorbing layer, a dielectric mirror, and a liquid crystal layer sandwiched between indium-tin-oxide transparent electrodes deposited on optical quality glass flats. The non-coherent light image is directed onto the photoconductor; this reduces the impedance of the photoconductor, thereby switching the AC voltage that is impressed across the electrodes onto the liquid crystal to activate the device. The liquid crystal is operated in a hybrid field effect mode. It utilizes the twisted nematic effect to create a dark off-state (voltage off the liquid crystal) and the optical birefringence effect to create the bright on-state. The liquid crystal thus modulates the polarization of the coherent read-out or projection light responsively to the non-coherent image. An analyzer is used to create an intensity modulated output beam which is projected through a Fourier transform lens onto a screen or other detector means.
摘要翻译： 公开了一种使用特别适用于实时相干光数据处理的反射模式液晶光阀的高性能相干光数据处理系统。 该系统的优选实例使用包括CdS光电导体，CdTe光吸收层，电介质镜和夹在沉积在光学优质玻璃平板上的铟锡氧化物透明电极之间的液晶层的反射光阀。 非相干光图像被引导到光电导体上; 这降低了光电导体的阻抗，从而将跨电极施加的交流电压切换到液晶上以启动该装置。 液晶以混合场效应模式运行。 它利用扭曲的向列效应产生暗的关闭状态（液晶的电压）和光学双折射效应以产生亮的导通状态。 因此，液晶响应于非相干图像调制相干读出或投影光的偏振。 分析仪用于产生强度调制的输出光束，其通过傅立叶变换透镜投影到屏幕或其它检测器装置上。
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公开(公告)号：US4019807A
公开(公告)日：1977-04-26
申请号：US664776
申请日：1976-03-08
摘要： There is disclosed a high performance reflective mode liquid crystal light valve suitable for general image processing and projection and particularly suited for application to real-time coherent optical data processing. A preferred example of the device uses a CdS photoconductor, a CdTe light absorbing layer, a dielectric mirror, and a liquid crystal layer sandwiched between indium-tin-oxide transparent electrodes deposited on optical quality glass flats. The non-coherent light image is directed onto the photoconductor; this reduces the impedance of the photoconductor, thereby switching the AC voltage that is impressed across the electrodes onto the liquid crystal to activate the device. The liquid crystal is operated in a hybrid field effect mode. It utilizes the twisted nematic effect to create a dark off-state (voltage off the liquid crystal) and the optical birefringence effect to create the bright on-state. The liquid crystal thus modulates the polarization of the coherent read-out or projection light responsively to the non-coherent image. An analyzer is used to create an intensity modulated output beam.
摘要翻译： 公开了一种适用于一般图像处理和投影的高性能反射模式液晶光阀，特别适用于实时相干光数据处理。 器件的优选实例使用CdS光电导体，CdTe光吸收层，电介质镜和夹在沉积在光学优质玻璃平板上的铟锡氧化物透明电极之间的液晶层。 非相干光图像被引导到光电导体上; 这降低了光电导体的阻抗，从而将跨电极施加的交流电压切换到液晶上以启动该装置。 液晶以混合场效应模式运行。 它利用扭曲的向列效应产生暗的关闭状态（液晶的电压）和光学双折射效应以产生亮的导通状态。 因此，液晶响应于非相干图像调制相干读出或投影光的偏振。 分析仪用于产生强度调制输出光束。
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