Diffractive subtractive color filtering technique

Details Diffractive subtractive color filtering technique Diffractive subtractive color filtering technique

1975-02-03

1976-05-18

Stern, Ronald J.

350162R, 350314, G02B 2738

Patent

active

039573540

ABSTRACT:
A subtractive color filtering technique, suitable for the projection of color pictures, employs diffraction, rather than color dyes, for discriminatingly subtracting unwanted spectral wavelength portions of polychromatic illuminating light. The useful output light may consist of solely the zero-order diffraction output light or, alternatively, one or a certain combination of diffraction orders other than the zero diffraction order (such as the aggregate of all diffraction orders other than the zero diffraction order which corresponds to the complement of the zero-order diffraction output light).

REFERENCES:
patent: 2985866 (1961-05-01), Norton
patent: 3095475 (1963-06-01), Brake
patent: 3732363 (1973-05-01), Glenn
patent: 3842202 (1974-10-01), Coale

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