Frequency multiplexed optical spatial filter based upon photochemical hole burning
First Claim
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1. A frequency multiplexed optical spatial filter comprising:
- a plurality of images stored in a photochemical hole burning storage medium, said images formed at different optical frequencies and co-existing in the same volume of said medium.
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Abstract
A frequency multiplexed optical spatial filter is based upon a thin film of a photochemical hole burning material. The filter stores a plurality of images in the photochemical hole burning medium. The images are formed at different optical frequencies and coexist in the same volume of the storage medium. Individual images are accessed by changing the frequency of the illuminating radiation.
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Citations
9 Claims
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1. A frequency multiplexed optical spatial filter comprising:
a plurality of images stored in a photochemical hole burning storage medium, said images formed at different optical frequencies and co-existing in the same volume of said medium. - View Dependent Claims (2, 3, 4)
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5. A pattern recognition system comprising:
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a frequency multiplexed optical spatial filter including a plurality of images stored in a photochemical hole burning storage medium, said images formed at different optical frequencies and coexisting in the same volume of said medium, means for illuminating said medium with a first optical frequency with an unknown image, and means for comparing said unknown image with said plurality of images by altering said first optical wavelength. - View Dependent Claims (6, 7, 8)
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9. A method of pattern recognition comprising the steps of
storing a plurality of known images in a photochemical hole burning storage medium, said images formed at different optical frequencies and co-existing in the same volume of said medium, illuminating said storage medium with a first optical frequency with an unknown image, and comparing said unknown image with said plurality of images by altering said first optical frequency.
Specification