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:
Jun. 27, 2006
Filed:
Sep. 24, 2002
Akira Tsukihashi, Gunma, JP;
Michiyoshi Sawada, Gunma, JP;
Kazunori Ueki, Kiryu, JP;
Tadashi Iwama, Takasaki, JP;
Akira Tsukihashi, Gunma, JP;
Michiyoshi Sawada, Gunma, JP;
Kazunori Ueki, Kiryu, JP;
Tadashi Iwama, Takasaki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An optical system of an optical recording apparatus forms a main spot and sub-spots preceding and succeeding the main spot on a signal recording medium. The optical system is set such that the sub-spot is shifted from the main spot in the direction orthogonal to a signal track by a distance expressed by an expression (2k−1)P/4(k=natural number), in which P denotes a distance between adjacent signal tracks on the signal recording medium. Thus, the sub-spot succeeding the main spot can be used to effectively read the state of a signal recorded on the signal recording medium by the main spot.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile