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:
Sep. 06, 1994
Filed:
Jan. 28, 1993
Robert D Sigler, Cupertino, CA (US);
Lockheed Missiles & Space Company, Inc., Sunnyvale, CA (US);
Abstract
Optimized design forms are provided for glass-liquid lens triplets for use as telescope objectives having reduced secondary spectrum. Each lens triplet comprises an abnormal-dispersion liquid lens element contained between two normal-dispersion glass lens elements. The glass lens elements are made of readily available and relatively inexpensive optical glasses. The liquid lens element in each lens triplet consists of a commercially available viscous supercooled liquid of abnormal dispersion, which is transparent to optical radiation at visible wavelengths without freezing at temperatures in a range from about -50.degree. C. to about 50.degree. C.