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. 12, 1991
Filed:
Oct. 19, 1988
Applicant:
Inventor:
Erwin E Cooper, Carrollton, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350-14 ; 350474 ;
Abstract
An infrared refractive lens triplet having color correcting properties for radiation within the 3 to 13 micrometer spectral band. In certain embodiments of the invention the triplet is capable of simultaneously focusing radiation in the 3-5 micrometer and the 8-12 micrometer atmospheric windows for imaging about a single focal plane. In these embodiments one lens comprises germanium and another is formed of materials selected from the group consisting of sulfides and selenides of zinc and combinations thereof. A third lens is a glass characterized by chromic properties corresponding approximately to