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:
Jan. 16, 1996
Filed:
May. 22, 1995
Tsukasa Ogino, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical information recording/reproducing apparatus for recording and/or reproducing information on and/or from an optical memory medium includes an optical system for forming a light beam spot for recording and/or reproducing information on and/or from the optical memos medium, a signal generating unit for detecting a position of the optical system relative to the medium and generating an analog signal corresponding to the detected position, an actuator for driving the optical system, an A/D converter for converting the analog signal from the signal generating unit into a digital signal, a digital signal processing unit for calculating a control amount of the actuator on the basis of a predetermined control process in order to correct the relative position from an output from the A/D converter, and a D/A converter for converting the output from the digital signal processing unit into an analog signal. The actuator is driven in correspondence with the output from the D/A converter. The control process of the digital signal processing unit can be arbitrarily changed.