发明名称 |
Adaptively aligned optical correlator and method |
摘要 |
An improved optical correlator using a coherent light beam employs a method of adaptive alignment. A test pattern modulates an input spatial light modulator. The modulated beam propagates through passive transforming optical elements to a filter spatial light modulator, which is simultaneously modulated with an independently transformed frequency domain reference. The resulting correlation or coincidence of the optically transformed pattern with the independently transformed reference is processed to yield a feedback signal indicative of any optical misalignment of the optical correlator. The feedback signal drives a beam deflector to compensate by adjusting the path of the coherent beam, thereby improving and maintaining optical alignment of the correlator.
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申请公布号 |
US6330361(B1) |
申请公布日期 |
2001.12.11 |
申请号 |
US19990268789 |
申请日期 |
1999.03.16 |
申请人 |
LITTON SYSTEMS, INC. |
发明人 |
MITCHELL ROBERT A.;MILLS STUART A.;RYAN JAMES |
分类号 |
G06E3/00;G06K7/14;(IPC1-7):G06K9/00;G06K1/12;G06K9/74;G06K9/76;G06K27/46 |
主分类号 |
G06E3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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