Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1988-04-13
1989-01-03
Richardson, Robert L.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 45, G11B 700
Patent
active
047962453
ABSTRACT:
An electro-optical device is able to follow the information structure (2) of a moving information carrier (3) with a radiation spot 17 in two directions, of which one extends in a plane perpendicular to the other. A lens system (5) is fixed in a lens mounting (9) which relative to a frame (4) may perform pivotal movements about a pivotal axis (10) parallel to the optical axis (6) of the lens system and translational movements along the pivotal axis (10) by means of electromagnetic actuator means (14, 13) which are symmetrically located with respect to the pivotal axis. The lens mounting (9) is of elongate form and its parts which are situated on opposite sides of the pivotal axis (11) have substantially the same mass and mass distribution.
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patent: 4389101 (1983-09-01), van Rosmalen
patent: 4403316 (1983-09-01), van de Veerdonk
patent: 4592037 (1986-05-01), Ohnuki
patent: 4660190 (1987-04-01), Fujii et al.
patent: 4664476 (1987-05-01), Kasuga
van Alem Antonius A. M.
van Rosmalen Gerard E.
Faller F. Brice
Richardson Robert L.
U.S. Philips Corporation
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