Method for recording and reconstructing pulse laser holograms in

Details Method for recording and reconstructing pulse laser holograms in Method for recording and reconstructing pulse laser holograms in

1981-12-30

1984-05-29

Arnold, Bruce Y.

350 381, 350 385, G03H 126

Patent

active

044511140

ABSTRACT:
A method for recording and reconstructing a hologram recorded with two pulse laser beams having different wavelengths in order to increase the illuminance of the reconstructed image recorded in one of said channels is disclosed. The method comprises the steps of generating a first reconstruction beam at a wavelength shifted from the wavelength of the recording beam having the lesser illuminance if the two recording beams had equal irradiance toward a direction of the other recording beam. The wavelength of the second reconstruction beam has a value shifted from its associated recording beam by an amount equal the value that said first reconstruction beam is shifted from its associated recording beam. The resultant reconstructed images from the two reconstruction beams are generally equal in size and are in co-registration. The amount of shift is chosen so that the reconstruction wavelengths have substantially equal illuminance for an equal amount of irradiation. The product obtained by the recording method is also disclosed.

REFERENCES:
patent: 3532406 (1970-10-01), Hartman
patent: 3556631 (1971-01-01), Cook
patent: 3695744 (1972-10-01), Clay
patent: 4067638 (1978-01-01), Yuno et al.
patent: 4071291 (1978-01-01), Suzuki et al.
patent: 4235505 (1980-11-01), Hariharan et al.
Caulfield, H. J., Handbook of Optical Holography, pp. 95-97, 199-204, 269-276, 456-457, and Chapter 17, Academic Press, 1979.

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