Bearing arrangement for an objective of an optical apparatus for

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal

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364 44, G11B 708, G11B 712, G11B 2112

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043947557

ABSTRACT:
An optical apparatus (1) for reading a recording track on an optical disc (3) comprises an objective (6) supported by a combined bearing arrangement which permits translations (12) of the objective for focussing a light beam (2) on the disc and pivotal movements (13, 14) for following the recording track in a radial and eventually also a tangential direction. The combined bearing arrangement comprises a plain bearing with a stationary member (17) having a convex outer surface (18) and a cylindrical moving member (19) which relative to the stationary member moves in a sliding and a pivoting fashion.

REFERENCES:
patent: 4021101 (1977-05-01), Camerik
patent: 4032776 (1977-06-01), Van Rosmalen
patent: 4092529 (1978-05-01), Aihara et al.
patent: 4135083 (1979-01-01), Van Alem et al.
patent: 4135206 (1979-01-01), Kleuters et al.
patent: 4190775 (1980-02-01), Sakurai et al.
patent: 4193091 (1980-03-01), Kleuters et al.
patent: 4252412 (1981-02-01), Camerik
patent: 4302830 (1981-11-01), Humaroka et al.

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