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:
Dec. 11, 1979
Filed:
Mar. 16, 1978
Applicant:
Inventor:
Fritz P Heller, Bromley, GB;
Assignee:
Elliott Brothers (London) Limited, Chelmsford, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350171 ; 350174 ; 358 55 ;
Abstract
A head-up display optical projector using a Petzval type collimating optical system wherein a secondary image is injected through an optically flat peripheral surface of a lens included in the Petzval lens group closer to the main image display surface of the projector, the lens incorporating an interior flat dichroic film for combining the main and secondary images.