Invention Grant
- Patent Title: Recording apparatus and control method
- Patent Title (中): 记录装置和控制方法
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Application No.: US13252505Application Date: 2011-10-04
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Publication No.: US08411543B2Publication Date: 2013-04-02
- Inventor: Yoshiyuki Urakawa
- Applicant: Yoshiyuki Urakawa
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: JP2010-234657 20101019
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
A recording apparatus including: a light-illuminating/receiving-unit illuminating an optical-disc-recording-medium through a common object-lens with recording-light and ATS-light and receiving reflected-ATS-light; a rotation-driving-unit driving rotation of the medium; a tracking-mechanism driving the lens in a tracking-direction parallel to the radial direction; a tracking-error-signal-generation-unit generating a tracking-error-signal; and a tracking-servo-controller performing tracking-servo-control on the lens based on the tracking-error-signal, wherein the tracking-servo-controller includes: a servo-calculation-unit based on the tracking-error-signal in a feedback-loop as a tracking-servo-loop; and a feed-forward-controller calculating an estimated control-target-value of the tracking-servo-control based on an estimated illumination-spot-position value of the ATS-light obtained in a first-filter-process emulating a transfer-characteristic of the tracking-mechanism on an output of the servo-calculation-unit and a distance between the illumination-spot-positions and applies a control-signal generated in a second-filter-process on the estimated value for suppressing a transfer-characteristic-gain of the tracking-servo-loop to 0 dB or less in the entire band to the tracking-servo-loop.
Public/Granted literature
- US20120092976A1 RECORDING APPARATUS AND CONTROL METHOD Public/Granted day:2012-04-19
Information query
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