Complex photodichroic spatial filter

Details Complex photodichroic spatial filter Complex photodichroic spatial filter

1977-01-12

1978-08-29

Corbin, John K.

Static information storage and retrieval

Magnetic bubbles

Guide structure

350154, 365119, G02B 520

Patent

active

041100042

ABSTRACT:
A complex spatial filter is provided by the combination of two dichroic ctal plates, one quarter waveplate, and two linear polarizers. The complex spatial filter consists of real and imaginary parts, both of which can have either a positive or negative sign and the structure is capable of eraseably recording varying degrees of absorbency which exhibit polarization discrimination in a desired format that can then be used to process the Fourier transform of a light beam containing desired information.

REFERENCES:
patent: 3535021 (1970-10-01), Amodei
patent: 3700902 (1972-10-01), Buchan
patent: 3771150 (1973-11-01), Schneider
patent: 3846764 (1974-11-01), Schneider

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