System and method for accessing tracks for optical disc apparatu

Details System and method for accessing tracks for optical disc apparatu System and method for accessing tracks for optical disc apparatu

1988-11-16

1990-08-21

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

360 7806, 360 7805, G11B 2108

Patent

active

049512722

ABSTRACT:
A system and method for accessing tracks for an optical disc apparatus are disclosed in which when a light spot is jumped toward a target track, an acceleration pulse is applied across a fine tracking actuator to accelerate the fine tracking actuator for a predetermined period of time, a relative speed of the light spot to the tracks of the optical disc is detected though a detection of a period of a traverse signal outputted due to a movement of the fine tracking actuator, and a control signal corresponding to the relative speed is used to control the movement speed of the fine tracking actuator. Therefore, before the end of a track jump, a constant relative speed can be achieved such that a smooth tracking servo can be carried out. Consequently, an access time to access the target track can be shortened.

REFERENCES:
patent: 4422113 (1983-12-01), Mabon
patent: 4796246 (1989-01-01), Tsuyoshi et al.

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