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:
Jan. 13, 1976
Filed:
Dec. 11, 1974
Applicant:
Inventors:
Gordon Henry Cook, Leicester, EN;
John Anthony Fawcett, Leicester, EN;
Assignee:
The Rank Organisation Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350173 ;
Abstract
A four-element composite prism assembly for splitting an incident beam into three colour components, the first and second pairs of elements being separated by respective air gaps, and colour separation occurring at respective spectrally selective dichroic coatings between the second and third and the third and fourth prism elements respectively, the separated colour components being directed in different directions by total internal reflection at the air gaps. To achieve the optimum separation upper and lower limits are defined in the claims for the apex angles of the three prism elements.