Optical transversal filter

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	Optical transversal filter
其他题名	Optical transversal filter
	RIZA, NABEEL A.
	1994-07-12
专利权人	LOCKHEED MARTIN CORPORATION
公开日期	1994-07-12
授权国家	美国
专利类型	授权发明
摘要	An optical transversal filter includes a processing system having a light source adapted to be modulated by an input electromagnetic signal and generate a plurality of collimated optical signals, a cascade of optical time delay units sequentially coupled to act upon the collimated optical signals passing from the light source to selectively differentially time delay respective ones of the optical signals, an optical trimmer device coupled to receive the differentially time delayed optical signals and to selectively attenuate respective ones of those signals, and a filter output assembly which receives and sums the optical signals from the trimmer device optically and converts the sum to a corresponding filtered electrical signal, or alternatively, converts the respective optical signals to electrical signals and electrically sums the signals. Each optical time delay unit includes a spatial light modulator having liquid crystal pixels disposed such that the polarization orientation of each respective optical signal is controlled by passing respective optical signals through respective ones of the pixels. Dependent on its polarization orientation, each optical signal passes through a delay assembly optically coupled to the respective spatial light modulator in the optical time delay unit on either a direct path or a delay path.
其他摘要	光学横向滤波器包括处理系统，该处理系统具有适于由输入电磁信号调制并产生多个准直光信号的光源，顺序耦合的级联光学时间延迟单元以作用于从光传递的准直光信号。用于选择性地差分地延迟各个光信号的时间源，光耦合器装置耦合以接收差分时间延迟的光信号并选择性地衰减这些信号中的相应信号，以及滤波器输出组件，其接收和求和来自光信号的光信号。修整器装置是光学的并且将该和转换成相应的滤波电信号，或者可选地，将相应的光信号转换成电信号并对信号进行电和。每个光学时间延迟单元包括空间光调制器，该空间光调制器具有液晶像素，所述液晶像素设置成使得通过使各个光信号通过各个像素来控制每个相应光信号的偏振方向。取决于其偏振取向，每个光信号在直接路径或延迟路径上通过光学耦合到光学时间延迟单元中的相应空间光调制器的延迟组件。
授权日期	1994-07-12
申请日期	1992-12-23
专利号	US5329118
专利状态	失效
申请号	US07/996203
公开（公告）号	US5329118
IPC 分类号	G02B6/28 \| G01S7/487 \| G01S7/48 \| H01Q3/26 \| H01J5/16
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/36129
专题	半导体激光器专利数据库
作者单位	LOCKHEED MARTIN CORPORATION
推荐引用方式 GB/T 7714	RIZA, NABEEL A.. Optical transversal filter. US5329118[P]. 1994-07-12.

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