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:
Oct. 21, 2014
Filed:
May. 16, 2011
Shinzoh Murakami, Osaka, JP;
Shinzoh Murakami, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Abstract
There is provided an optical pickup apparatus. In an optical pickup apparatus, a focus diffraction region includes focus regions of which a number of types is equal to a number of types of light that can be emitted by a light source. The types of the focus regions correspond to the respective types of light, the respective focus regions diffract the corresponding types of light toward same positions of focus light-receiving regions. The focus regions include a plurality of focus segmented regions. The plurality of focus segmented regions of the respective types of focus regions are periodically distributed in the focus diffraction region, and at least some of the focus segmented regions are disposed to be adjacent to focus segmented regions for different types of light.