System for producing holograms

Details System for producing holograms System for producing holograms

1989-11-21

1990-11-27

Arnold, Bruce Y.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350 36, 356347, G03H 122

Patent

active

049731149

ABSTRACT:
An apparatus for making holograms of an object is described. The apparatus has a laser source emitting a collimated or slightly divergent laser beam, and a holder for a holographic plate to hold the holographic plate between said object and said laser source in a position near said object. A positive lens means having its focus is placed between said lens means and said holographic plate such that a divergent laser beam is impinging on said holographic plate and cover an illuminating area on said plate extending well beyond the area of said object in a plane parallel to said holographic plate. A closed housing is placed around said laser source and said lens means, which housing has a controllable shutter to be opened only at control provided in an end wall in a position cutting the beam path of said outgoing laser beam.

REFERENCES:
patent: 3631711 (1972-01-01), Kreuzer
patent: 3644047 (1972-02-01), Brown et al.
patent: 3721498 (1973-03-01), Narodny et al.
patent: 3744911 (1973-07-01), Stetson et al.
patent: 3975101 (1976-08-01), Copeland
patent: 3976383 (1976-08-01), Olsen
patent: 4071291 (1978-01-01), Suzuki et al.
patent: 4206965 (1980-06-01), McGrew
patent: 4764012 (1988-08-01), Ryden et al.
patent: 4798466 (1989-01-01), Bouteyre et al.
"Holographic Measuring of Deformations in Complete Upper Dentures", Optics and Photonics Applied to Medicine, vol. 211, 1979, By I. Dirtoft et al., pp. 106-110.

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