Multi-substrate gobo

Optics: image projectors – Color filter

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353 30, 353 62, G03B 2114

Patent

active

058069518

ABSTRACT:
An acid etched gobo for producing a predetermined, multi-colored light pattern which is formed by first and second substrates having abutting planar surfaces secured together. Each of the planar surfaces includes a complimentary portion of the predetermined, multi-colored light pattern, acid etched in a coating deposited on the planar surfaces. At least one of the coatings is a dichroic coating.

REFERENCES:
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patent: 4779176 (1988-10-01), Bornhorst
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patent: 4891738 (1990-01-01), Richardson et al.
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patent: 5254202 (1993-10-01), Kaplan
patent: 5364498 (1994-11-01), Chen
patent: 5371543 (1994-12-01), Anderson
patent: 5430629 (1995-07-01), Belliveau et al.
van Milligen et al. "Non-degrading Color Transparencies" 15 Feb. 1985, pp. 461-463, vol. 24, No. 4, Applied Optics.

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