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. 01, 2013
Filed:
Sep. 08, 2009
Hidefumi Iwasa, Kawasaki, JP;
Shigeo Kiso, Yokohama, JP;
Terunobu Saitoh, Kawasaki, JP;
Toshiji Nishiguchi, Kawasaki, JP;
Hidefumi Iwasa, Kawasaki, JP;
Shigeo Kiso, Yokohama, JP;
Terunobu Saitoh, Kawasaki, JP;
Toshiji Nishiguchi, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical material is provided that has a high transmittance, a high refractive index, a low Abbe constant, a high secondary dispersion property, and a low water absorption rate. The optical material includes a polymer of a mixture which contains: a sulfur-containing compound represented by the following general formula (1): a sulfur-containing compound represented by the following general formula (2): and an energy polymerization initiator, in which a content of the sulfur-containing compound represented by the chemical formula (2) is 10% by weight or more to 60% by weight or less, an Abbe constant (νd) of the polymer of the mixture satisfies 18<νd<23, and a secondary dispersion property (θg,F) thereof satisfies 0.68<θg,F<0.69.