The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1991
Filed:
Jun. 13, 1989
Hiroshi Taniura, Tsuchiura, JP;
Think Laboratory Co., Ltd., Chiba, JP;
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.