发明授权
- 专利标题： Real-time edge-enhanced optical correlator
- 专利标题（中）： 实时边缘增强光相关器
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申请号： US797569申请日： 1991-11-25
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公开(公告)号： US5150228A公开(公告)日： 1992-09-22
- 发明人: Tsuen-Hsi Liu , Li-Jen Cheng
- 申请人： Tsuen-Hsi Liu , Li-Jen Cheng
- 申请人地址： DC Washington
- 专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人： The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- 当前专利权人地址： DC Washington
- 主分类号： G06E3/00
- IPC分类号： G06E3/00 ; G06K9/58
摘要：
Edge enhancement of an input image by four-wave mixing a first write beam with a second write beam in a photorefractive crystal, e.g., GaAs, achieved for VanderLugt optical correlation with an edge enhanced reference image by optimizing the power ratio of a second write beam to the first write beam, e.g., 70:1, and optimizing the power ratio of a read beam, which carries the reference image to the first write beam, e.g., 100:701. Liquid crystal TV panels are employed as spatial light modulators in order to change the input and reference images in real time.