Patent
1975-03-17
1977-04-12
Stern, Ronald J.
96 27H, 350 35, G02B 2738, G03H 102
Patent
active
040171582
ABSTRACT:
A transparency for reproducing preselected area delineations in colors and intensities thereof variable at will is formed by using an interference pattern formed holographically by the interference of a split laser beam. The transparency has a plurality of mutually exclusive areas each individual area representing a variable color wherein the area or areas representing a particular variable color contains spatial frequency carriers which are oriented differently from the spatial frequency carriers of the other areas. The holographic process of preparing the transparency by separately exposing each area in a different orientation to the interference of the two said laser beams is also disclosed. The process and apparatus for utilizing the separation transparency to form predetermined images wherein the color of the individual areas and the intensity thereof forming such image may be varied at will is also disclosed.
REFERENCES:
patent: 3314052 (1967-04-01), Lohmann
patent: 3658526 (1972-04-01), Haugh
patent: 3667946 (1972-06-01), Sturdevant
patent: 3695744 (1972-10-01), Clay
patent: 3716286 (1973-02-01), St. John
patent: 3732363 (1973-05-01), Glenn
patent: 3947105 (1976-03-01), Smith
E. I. Du Pont de Nemours and Company
Stern Ronald J.
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