Optical recording/reproducing by reducing laser power when there

Details Optical recording/reproducing by reducing laser power when there Optical recording/reproducing by reducing laser power when there

1992-04-27

1994-11-22

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 33, G11B 700

Patent

active

053675150

ABSTRACT:
An optical information recording and reproduction apparatus that correctly performs tracking control even when there is a step in the information recording surface in an apparatus that records and reproduces information to and from an information recording medium such as an optical card or the like. An optical information recording and reproduction apparatus which focusses a light spot from a laser onto an optical information recording medium which has a tracking track and performs the recording and reproduction of information to required positions using the tracking track as a reference. The apparatus reduces the optical output of the laser when track jumping and seeking when there is an information reproduction operation.

REFERENCES:
patent: 4660189 (1987-04-01), Tsukamura et al.
patent: 4871649 (1989-10-01), Imataki et al.
patent: 5070496 (1991-12-01), Ogawa et al.

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