Drive control apparatus, drive control method and optical...

Details Drive control apparatus, drive control method and optical... Drive control apparatus, drive control method and optical...

2009-05-12

2011-11-01

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053120, C369S053420

Reexamination Certificate

active

08050154

ABSTRACT:
A control unit is caused to drive a collimator lens from a position of an origin, by a clock number A of drive pulses of a pulse rate T1, thereby to move the collimator lens, and is caused to return the lens to the position of the origin at a pulse rate T2higher than the pulse rate T1, and counts a clock number B of drive pulses required for returning the lens, and repeats the counting while raising the rate T2stage by stage, until the clock numbers A and B do not become equal. When the clock numbers A and B are not equal, the control unit judges the occurrence of the step-out, and determines the rate T2being one stage lower than the rate T2at which the occurrence of the step-out has been judged, as the pulse rate of the operation of correction of spherical aberration.

REFERENCES:
patent: 6249495 (2001-06-01), Okada et al.
patent: 2006/0143637 (2006-06-01), Torii
patent: 2007/0206460 (2007-09-01), Ono et al.
patent: 2007/0241716 (2007-10-01), Kubo et al.
patent: 2009/0109819 (2009-04-01), Hosoda et al.
patent: 2004-199780 (2004-07-01), None
patent: 2005-302118 (2005-10-01), None
patent: 2006-155839 (2006-06-01), None
patent: 2007-257720 (2007-10-01), None

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