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:
May. 22, 2012
Filed:
Jan. 03, 2011
Hidenori Wada, Kyoto, JP;
Sadao Mizuno, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Keiichi Matsuzaki, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Sadao Mizuno, Osaka, JP;
Yoshiaki Komma, Osaka, JP;
Keiichi Matsuzaki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical head for recording or reproducing a signal on or from an optical recording medium including a light source, an objective lens for condensing light emitted from the light source to the optical recording medium, and a light-separating device arranged between the light source and the objective lens in order to separate the light reflected from the optical recording medium from the light emitted from the light source. The light-separating device includes a first glass, a multilayer film formed on the first glass, and an adhesive layer arranged on the multilayer film in order to bond a second glass onto the multilayer film. The majority of the light emitted from the light source enters into the light-separating device through the first glass and is reflected by the multilayer film.