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:
Jan. 04, 2000
Filed:
May. 15, 1998
Applicant:
Inventors:
Hiromu Mukai, Kawachinagano, JP;
Tetsuo Kohno, Toyonaka, JP;
Yasushi Yamamoto, Kishiwada, JP;
Yutaka Inoue, Osaka, JP;
Kyoko Yamaguchi, Sakai, JP;
Assignee:
Minolta Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359431 ; 359362 ; 359642 ; 359686 ;
Abstract
An optical system includes a first optical element formed of a noncrystalline polyester resin having a copolymer ratio of 9,9-bis [4(2-hydroxyethoxy) phenyl]fluorene in a range of 35 molar percent to 45 molar percent when the dicarboxylic acid component is 100 molar percent, and a second optical element formed of material incorporating an ultraviolet light absorption agent and disposed at least either anteriorly or posteriorly to the first optical element.