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:
Jun. 23, 2009
Filed:
Nov. 20, 2006
Tsuguhiro Abe, Chiba, JP;
Tsuguhiro Abe, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
There is provided an optical pickup apparatus which includes a light source that generates light irradiating an optical recording medium; and an objective lens that collects the light irradiated from the light source on a recording surface of the recording medium, which further includes a coupling lens arranged on an optical path between the light source and the objective lens. In the optical pickup apparatus, a surface shape of the coupling lens is formed so that a preset spherical aberration amount is generated in the light irradiated from the light source at a position settled corresponding to a shift amount of the objective lens and where the light irradiated from the light source passes through the coupling lens, when the objective lens shifts.