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:
Feb. 01, 1988
Filed:
May. 19, 1982
Applicant:
Inventors:
Windell N Mohon, Athens, AL (US);
Wiley V Dykes, Winter Park, FL (US);
Arthur Cox, Park Ridge, IL (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350452 ;
Abstract
A fresnel lens employs a design that reduces the transmission of stray light to a viewer located at its entrance pupil, said design requiring directional undercutting of selected facets of the lens so as to align the directionally undercut nonimaging surface parallel to the viewer's line of sight. The facets of the lens are arcuately shaped to yield a closer approximation to a glass lens. The lens is of particular use in a visual image display system.