Height adjusting device for a pickup

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

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Details

369 4411, 369253, 369244, 2502015, G11B 700

Patent

active

050900005

ABSTRACT:
A height adjusting device for adjusting the height of a pickup, comprises a support mechanism for supporting the pickup on the carriage in a manner that a position of the pickup along the axis of rotation of the turntable of the optical disc player is adjustable and an adjusting device for driving the support mechanism to adjust the position of the pickup. The adjusting device generates a height position signal indicative of the position of the pickup and the support mechanism is driven in response to the magnitude of the height position signal only when the magnitude of the height position signal is greater than a predetermined level. According to the other aspect of the invention, a compensated height position signal is generated by superimposing a compensating signal indicative of the position of the optical system of the pickup relative to the housing of the pickup on the height position signal, and the support mechanism is driven in response to the magnitude of the compensated height position signal.

REFERENCES:
patent: 4769803 (1988-09-01), Yamamiya

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