Abstract

Color-coded, simultaneous recognition of several characters is experimentally performed using wavelength-triplexed, reflection-type holographic filters made with the primary wavelengths, 632.8, 514.5, and 488.0 nm. Helpful data on the diffraction efficiency and the spectrally diffracted intensity of reflection-type holograms are presented.

© 1982 Optical Society of America

Pattern recognition with wavelength-multiplexed filters

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Lippmann color holograms recorded in methylene-blue-sensitized dichromated gelatin

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