Optical element to assure a minimum spacing

Details Optical element to assure a minimum spacing Optical element to assure a minimum spacing

1977-03-21

1978-08-08

Corbin, John K.

350 69, G02B 308

Patent

active

041052927

ABSTRACT:
An optical system incorporating between two opposed contacting surfaces projections having a height of between 1 micron and 130 microns to space the surfaces a distance greater than twice the wave length of light in the visible spectrum to reduce interference patterns (Newton Rings) in a projected image and not substantially reduce the light transmission.

REFERENCES:
patent: 3876299 (1975-04-01), Brown, Jr.

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