Full color images using multiple diffraction gratings and maskin

Radiation imagery chemistry: process – composition – or product th – Retrieving image made using radiation imagery

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430 22, 430290, 355 32, 35016217, G03C 1100, G03C 500, G03F 900

Patent

active

047881160

ABSTRACT:
Method and apparatus for full-color reproduction of a continuous tone color picture or scene using multiple diffraction gratings and masking techniques. A properly photosensitized media, containing regular arrays of multiple diffraction gratings (70), is first created using computer-generated masks and an interferometric recording technique. This plate is referred to as the "white grating canvas" master or WGC master. Reflective and/or transmissive replicas of the WGC master are then created. For the reproduction of each unique scene, one of these WGC replicas is selectively masked in order to leave only certain gratings or portions thereof active. Photographic or xerographic means are two possible ways in which the masking might be accomplished. The selective masking of the WGC itself, or an intermediate material which is then laminated in registration with the WGC, is done in such a way as to reproduce the primary color components in the original scene when properly illuminated and viewed.

REFERENCES:
patent: 817569 (1906-04-01), Ives
patent: 3947105 (1976-03-01), Smith
patent: 3957354 (1976-05-01), Knop
patent: 4017158 (1977-04-01), Booth
patent: 4211918 (1980-07-01), Nyfeler et al.
"Microfiche in Color Mode by Diffraction", Electronics, vol. 49, No. 15, pp. 4E, 6E (Jul. 23, 1976).
"Diffraction Gratings for Color Filtering in the Zero Diffraction Order", Applied Optics, vol. 17, No. 23, pp. 3598-3603 (Nov. 5, 1978).

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