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:
Aug. 05, 2014
Filed:
May. 31, 2011
Fumitomo Yamasaki, Nara, JP;
Hiroshi Shiroiwa, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Junichi Asada, Hyogo, JP;
Osamu Kajino, Osaka, JP;
Noriaki Terahara, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Fumitomo Yamasaki, Nara, JP;
Hiroshi Shiroiwa, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Junichi Asada, Hyogo, JP;
Osamu Kajino, Osaka, JP;
Noriaki Terahara, Osaka, JP;
Toshiyasu Tanaka, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A disclosed objective lens includes: a lens having an entrance surface and an emission surface; and an anti-reflection coat formed on the emission surface, wherein a transmittance T[%] of the anti-reflection coat when an incident angle of a first laser beam having a first wavelength λ(390 nm≦λ≦430 nm) is 0°, and the transmittance T[%] of the anti-reflection coat when the incident angle of the first laser beam is 40° satisfy 0.95≦T/T≦1.05, and a transmittance T[%] of the anti-reflection coat when an incident angle of a second laser beam having a second wavelength λ(630 nm≦λ≦680 nm) is 0° and a transmittance T[%] of the anti-reflection coat when the incident angle of the second laser beam is 40° satisfy 0.85≦T/T≦0.97.