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:
Sep. 27, 2011
Filed:
Jun. 03, 2010
Masaomi Nabeta, Tokyo, JP;
Masaomi Nabeta, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A recording and reproducing apparatus is provided, which includes a rotary drive unit, an optical pickup unit, an adjustment unit which compensates for changes in characteristics of the laser light caused by changes in temperature, a temperature detection unit which detects a temperature of the optical pickup unit, an evaluation value generation unit which generates an evaluation value based on reflected light information, and a control unit. The control unit performs a temperature acquisition process, an optimum point adjustment process, a temperature acquisition process for acquiring a detected temperature during spin down, an optimum point search process, and a temperature characteristic compensation operation coefficient calculation process for performing temperature compensation with respect to the adjustment values.