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:
Aug. 08, 1995
Filed:
Jan. 10, 1994
Clarke K Eastman, Rochester, NY (US);
Daniel L Nelson, Penfield, NY (US);
Gerald J Smart, Penfield, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method and apparatus for, in an optical data recorder, maintaining a recording light beam in an on-track position on a recording medium. In the apparatus an optical head has a tracking arrangement movable in a direction parallel to the recording medium for changing the tracking position of the recording light beam on the recording medium. The method comprises the steps of: i)detecting light reflected from the optical recording medium and producing a corresponding tracking error signal; ii) generating a mark formation effectiveness signal for each of a plurality of trial tracking positions, each mark formation effectiveness signal being associated with a given value of the tracking error signal; iii) determining the mark formation effectiveness signal corresponding to an on-track position and determining an on-track the value of the associated tracking error signal; and iv)during data recording periods, in response to the tracking error signal, adjusting the position of the movable tracking means so that the on-track value of the tracking error signal is maintained.