Joint transform correlator using temporal discrimination

Details Joint transform correlator using temporal discrimination Joint transform correlator using temporal discrimination

1994-04-26

1996-04-23

Mai, Tan V.

Boots, shoes, and leggings

359561, 382278, G06E 300, G02B 2746, G06F 15336

Patent

active

055110193

ABSTRACT:
A joint transform correlator has modulators for temporally modulating a first optical input signal at a first frequency and a second optical input signal at a second frequency. An image sensor in the Fourier plane forms a product signal modulated by temporal sum and difference frequencies of the first and second frequencies. The product signal is thereafter demodulated at the temporal sum or difference frequency and the resulting optical signal is inverse Fourier transformed to recover the desired cross correlation signals.

REFERENCES:
patent: 5029220 (1991-07-01), Juday
patent: 5040140 (1991-08-01), Horner
patent: 5111515 (1992-05-01), Javidi
patent: 5119443 (1992-06-01), Javidi et al.
patent: 5367579 (1994-11-01), Javidi et al.

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