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. 20, 2010
Filed:
Nov. 08, 2006
Applicants:
Kunio Hatanaka, Chiyoda-ku, JP;
Yoshihiko Imanaka, Chiyoda-ku, JP;
Masanori Monri, Chiyoda-ku, JP;
Inventors:
Assignee:
Teijin Chemicals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/00 (2006.01); C08G 63/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index nand an Abbe number νsatisfies the following formula (I):+0.0076×ν≦1.78  (I)and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.