Optical beam splitter

Details Optical beam splitter Optical beam splitter

1989-06-13

1991-03-05

Arnold, Bruce Y.

350169, 350172, 350173, 350401, 350402, 350404, G02B 2710, G02B 2714

Patent

active

049972618

ABSTRACT:
An optical beam splitter which splits a single light into a plurality of split beams including a plurality of transparent plates of uniform thickness arranged in a stack with fully reflective films coated on the transparent plates at both ends of the stack and semi-reflective films coated on the remaining transparent plates in the stack. The reflectivities of the individual semi-reflective films gradually increase from one end to the other in the stack and a beam entering the stack is first entirely reflected by the back-end fully reflective film, then passes through the semi-reflective films while being reflected partially by the semi-reflective films, and then finally entirely reflected by the front-end fully reflective film so that a single beam is split into a plurality of parallel split beams.

REFERENCES:
patent: 2403731 (1946-07-01), MacNeille
patent: 4367921 (1983-01-01), Sawamua et al.
patent: 4627688 (1986-12-01), Kobayashi et al.

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