Zero-order diffractive subtractive filter projector

Details Zero-order diffractive subtractive filter projector Zero-order diffractive subtractive filter projector

1976-04-30

1978-04-04

Haroian, Harry N.

Optics: image projectors

Light shield, mask, hood, or diaphragm

353 38, 350162R, G03B 2114

Patent

active

040824381

ABSTRACT:
A projector for projecting pictures from zero-order diffractive subtractive filters, which may make use of an extraordinarily large amount of light flux, is achieved by a mask which transmits zero order light through an array of transparent regions separated by opaque regions which block higher diffraction order light.

REFERENCES:
patent: 2604002 (1952-09-01), Wengel
patent: 2805599 (1957-09-01), Pajes
patent: 2813146 (1957-11-01), Glenn
patent: 2985866 (1961-05-01), Norton
patent: 3216318 (1965-11-01), Gafford
patent: 3944350 (1976-03-01), Yevick

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