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. 09, 2008
Filed:
May. 29, 2003
Applicant:
Tsugio Wakita, Matsuyama, JP;
Inventor:
Tsugio Wakita, Matsuyama, JP;
Assignee:
Matsushita Electric Industrie Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/04 (2006.01); G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is an object of the present invention to provide an analysis apparatus which can achieve an image with a proper contrast even from an analysis object on an analysis optical disc. When an image is obtained from an analysis object, a control unit () switches a switch () in such a way that a detection signal of laser light has a constant average value, the laser light having been emitted to the analysis optical disc and reflected thereon or passed therethrough, and the control unit () feeds back the output signal of an integrating circuit () to an APC circuit () for controlling a laser drive circuit ().