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:
Jul. 28, 1998
Filed:
Jan. 17, 1997
Hirotake Ando, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical data recording/reproducing apparatus includes a light-receiving unit for receiving a light beam which has passed through or is reflected by a recording medium, the light-receiving unit having a plurality of light-receiving areas which are disposed such that they can perform wavefront splitting on the single light beam when the light-receiving areas receive the light beam, a data signal sensing unit for obtaining a data signal on the basis of an output of at least one of the plurality of light-receiving areas, and a servo signal sensing unit for obtaining a servo signal on the basis of an output of at least one of the plurality of light-receiving areas. The light-receiving area used to obtain the data signal and the light-receiving area used to obtain the servo signal are different from each other.