Vibration imparted focus search devices in an optical type disc

Details Vibration imparted focus search devices in an optical type disc Vibration imparted focus search devices in an optical type disc

1986-07-15

1989-09-12

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

350255, 250201, G11B 700, G02B 704

Patent

active

048666904

ABSTRACT:
A focus search device in an optical type disc playback device comprises an optical system for reading a signal of an optical type disc such as a video disc and a digital audio disc, an optical system moving device for moving the optical system compulsorily in a focusing direction to a focus servo range and a vibration imparting device for imparting vibration to a sliding portion of the optical system such as an object lens while the optical system is being compulsorily moved. Vibration applied to the sliding portion of the optical system puts a shaft and a bearing supporting the optical system in a vibrating state thereby facilitating the movement of the optical system and preventing occurrence of a stick slip.

REFERENCES:
patent: 4386823 (1983-06-01), Musha
patent: 4408313 (1983-10-01), Musha
patent: 4418405 (1983-11-01), Barnett et al.
patent: 4473274 (1984-09-01), Yano
patent: 4555780 (1985-11-01), Koide
patent: 4703466 (1987-10-01), Konno

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