Relative position sensing calibration for optical storage device

Details Relative position sensing calibration for optical storage device Relative position sensing calibration for optical storage device

1993-11-12

1995-06-13

Epps, Georgia Y.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, 369 4427, 369 4429, G11B 700

Patent

active

054250137

ABSTRACT:
A relative position error signal is calibrated in an optical storage device in which a tracking error signal (TES) varies as the light beam shifts its position through the objective lens. The calibration is performed by moving the coarse carriage to a predetermined region of the optical disk and measuring the TES. The fine actuator is adjusted until the tracking error signal equals a predetermined value. Then, the relative position error signal is read and an adjustment to the RPE gain is calculated to bring the gain to a predetermined value. The adjusted gain is used during normal disk access operations.

REFERENCES:
patent: 5220546 (1993-06-01), Fennema
patent: 5251194 (1993-10-01), Yoshimoto et al.
patent: 5347501 (1994-09-01), Iimura
patent: 5347503 (1994-09-01), Koyama et al.

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