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:
Apr. 19, 1983
Filed:
Apr. 03, 1981
Applicant:
Inventor:
Thomas P Fjeldsted, West Covina, CA (US);
Assignee:
Rockwell International Corporation, El Segundo, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350-13 ;
Abstract
A four element infrared lens design is provided having lenses of crystalline semiconductor materials such as silicon and germanium. The system is designed to have an f/1.5 speed corrected over the spectral region of 3.3 to 4.2 microns, and to reduce field curvature produced by projecting an image on a flat detector. A particular object of the design is to minimize the effect of narcissus and loss of resolution.
Fjeldsted, Thomas. (1983). Four element infrared objective lens (U.S. Patent No. 4380363). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4380363
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile