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. 23, 2008
Filed:
Jul. 27, 2006
Yasushige Ishihara, Hachioji, JP;
Atsushi Okawa, Hachioji, JP;
Hiroshi Tosaka, Hachioji, JP;
Tianyu Xie, Akiruno, JP;
Tadashi Hirata, Hachioji, JP;
Akihiro Horii, Hachioji, JP;
Kazunari Tokuda, Hachioji, JP;
Yasushige Ishihara, Hachioji, JP;
Atsushi Okawa, Hachioji, JP;
Hiroshi Tosaka, Hachioji, JP;
Tianyu Xie, Akiruno, JP;
Tadashi Hirata, Hachioji, JP;
Akihiro Horii, Hachioji, JP;
Kazunari Tokuda, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
A control portion of an optical image pickup apparatus includes a scan driver, a lock-in amplifier, and an A/D converter. The scan driver outputs a predetermined drive signal to a Y-scanning mirror and an X-scanning mirror and scans the Y-scanning mirror and the X-scanning mirror. The lock-in amplifier detects a signal level Vout of a frequency component of the drive signal of the scan driver among signals detected by a detector portion. The A/D converter converts a signal detected by a detector portion and a signal level of the detected signal of a frequency component of a drive signal detected by the lock-in amplifier to digital signals and outputs the digital signals to an image processor. Thus, mirror scan operations of the scanning mirrors can be securely detected.