Discontinuous wide-angle optic

Details Discontinuous wide-angle optic Discontinuous wide-angle optic

1975-03-17

1976-10-05

Corbin, John K.

350202, G02B 1306, G02B 1700

Patent

active

039841782

ABSTRACT:
A discontinuous wide-angle optic for use in a light receiver or transmitter comprises a partial spherical element having a planar boundary surface superposed on the base surface of a pyramidal facet reflector provided with a plurality of inclined facet surfaces, one for each of a plurality of directions of incidence of light passing through the spherical surface of said spherical element. When used in a light receiver, the spherical surface functions as a positive lens to cause entering light rays to converge toward one of the facet surfaces of the reflector for reflection therefrom into an image plane located at a diaphragm formed on a surface of said partial spherical element spaced from its said planar boundary surface. A light conductor in the form of a truncated pyramid is provided to limit the field of view, said light conductor being provided with the same number of facet surfaces as the facet reflector and the narrower end of said light conductor being placed in optical contact with said partial spherical element at said diaphragm. A light filter and light detector is disposed adjacent the wider end of the light conductor. When used as a light transmitter, a light emitter is placed adjacent the wider end of the light conductor to cause light to be reflected from the facet surfaces of the light conductor and reflector so as to leave the optic via said spherical surface.

REFERENCES:
patent: 2638033 (1953-05-01), Buchele et al.
patent: 3628027 (1971-12-01), Brauss

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