Optics: measuring and testing – By configuration comparison – With comparison to master – desired shape – or reference voltage
Patent
1996-10-04
1997-07-22
Font, Frank G.
Optics: measuring and testing
By configuration comparison
With comparison to master, desired shape, or reference voltage
356392, 356 71, G01B 1100
Patent
active
056508557
ABSTRACT:
The off-axis joint transform correlator improves on the extant on-axis jo transform correlator by eliminating the requirement for a second laser frequency and the means for blocking the first laser frequency from propagating beyond a given point in the correlator. These eliminations are accomplished by using a beamsplitter and a mirror to bring a second portion of the first frequency at an angle to read the pattern information written onto a spatial light modulator by the first portion.
REFERENCES:
patent: 4739415 (1988-04-01), Toyono et al.
patent: 5015867 (1991-05-01), Siegel et al.
patent: 5095194 (1992-03-01), Barbanell
Gregory Don A.
Kirsch James C.
Bush Freddie M.
Chang Hay Kyung
Font Frank G.
Nicholson Hugh P.
Ratiff Reginald A.
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