Holographic correlator array with selectable shift-invariance

Optical holographic correlators can perform many correlations simultaneously. Because the output plane must be divided among the individual templates in the system, for many systems shift-invariance limits the number of correlation templates than can be stored in one correlator. When the system is completely shift-invariant, the correlation peak from one correlator can shift into an area that has been reserved for a different template; in this case, a shifted version of one object might be mistaken for a well-centered version of a different object. This paper describes a technique to control the shift-invariance of a correlator system by moving the holographic material away from the Fourier plane.


Published in:
Proceedings of SPIE - The International Society for Optical Engineering, 3470, null, 203-208
Year:
1998
ISSN:
0277786X
Other identifiers:
Scopus: 2-s2.0-0032404877
Laboratories:




 Record created 2010-11-23, last modified 2018-03-17


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