Method for constructing and reconstructing hologram

Details Method for constructing and reconstructing hologram Method for constructing and reconstructing hologram

1989-05-24

1990-11-06

Laroche, Eugene R.

350 383, G03H 104

Patent

active

049681087

ABSTRACT:
A method for constructing and reconstructing a hologram. The hologram is constructed by irradiating two construction beams having different incidence angles onto a hologram record medium to form interference fringe patterns therein. The hologram is reconstructed by irradiating a reconstruction beam onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element. The incidence angle of the reconstruction beam is different from that of each construction beam and is arranged to be nearly a Bragg angle at any point of the hologram.

REFERENCES:
patent: 3940204 (1976-02-01), Withrington
patent: 4378142 (1983-03-01), Ono
patent: 4416505 (1983-11-01), Dickson
Dickson, "Scan Angle Multiplication in a Holographic Scanner," IBM Technical Disclosure Bulletin, vol. 23, No. 9, Feb. 1981,, pp. 4240-4241.
Y. Belvaus, "Influence de divers parametres d'enregistrement lors de la restitution d'un hologramme", NOUVELLE REVUE D'OPTIGUE, vol. 6, No. 3, 1975, pp. 137-147, Paris, FR, Chapters II.2, II.3, II.4, III.
LeRoy D. Dickson et al., "Holography in the IBM 3687 Supermarket Scanner", IBM Journal of Research and Development, vol. 26, No. 2, Mar. 1982, pp. 228-234.
J. Woznicki, "Geometry of Recording and Color Sensitivity for Evanescent Wave Holography using a Gaussian Beam", APPLIED OPTICS, vol. 19, No. 4, Feb. 15, 1980, pp. 631-637, Optical Society of America, New York.

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