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:
Jul. 08, 2003
Filed:
Nov. 13, 2000
Applicant:
Inventors:
Tadashi Koyama, Osaka, JP;
Hiroaki Yamamoto, Osaka, JP;
Koichiro Nakamura, Osaka, JP;
Jun Yamaguchi, Osaka, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 ;
U.S. Cl.
CPC ...
G02B 7/02 ;
Abstract
An optical element comprises a solid material in an optical path of the optical element, wherein the solid material comprises a first material and a second material, and the first and second materials have first and second temperature coefficients of refractive index, respectively, wherein the first temperature coefficient of refractive index has a sign which is opposite that of the second temperature coefficient of refractive index.