Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1987-10-13
1989-03-28
Faber, Alan
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 44, 350247, 350255, G11B 709
Patent
active
048170763
ABSTRACT:
The invention relates to an electro-optical device, comprising a frame (1), a movable holder (5) in which an objective (7) having an optical axis (9) is secured, bearing pin (25) fixed to the holder (5) and bearings (27, 29) fixed relative to the frame (1) supporting the holder so that it can be translated and rotated, a magnet (13) secured to the frame and cylindrical wall portions (1B) which wall portions with the magnet form an annular air gap (17) with a radial magnetic field. A focussing coil (19) is secured to the holder and is movable in the air gap, and a plurality of tracking coils (33) are secured to the holder and are situated on the outer side of the focussing coil. The tracking coils extend through recesses (37) between the cylindrical wall portions of the frame, the turns of the tracking coils being situated in or substantially in radial planes containing the axis of rotation (11) of the holder and the turns of each of the tracking coils together forming a continuous free space (35). Bridge members (39) of a soft-magnetic material extend through the free spaces and are magnetically linked and mechanically connected to the cylindrical wall portions on both sides of the tracking coils.
REFERENCES:
patent: 4473274 (1984-09-01), Yano et al.
patent: 4566089 (1986-01-01), Kime
patent: 4571026 (1986-02-01), Maruta
patent: 4643522 (1987-02-01), Takashima
patent: 4678276 (1987-07-01), Sekimoto et al.
patent: 4679903 (1987-07-01), Kasahara et al.
patent: 4687296 (1987-08-01), Terayama et al.
patent: 4694442 (1987-09-01), Gijzen et al.
Patent Abstracts of Japan, vol. 9, No. 246 (P-393) [1969], Oct. 3, 1985.
Patent Abstracts of Japan, vol. 7, No. 152 (P-208) [1297], Jul. 5, 1983.
Patent Abstracts of Japan, vol. 10, No. 202 (P-477) [2258], Jul. 15, 1986.
Patent Abstracts of Japan, vol. 9, No. 144 (P-365) [1867], Jun. 19, 1985.
Patent Abstracts of Japan, vol. 9, No. 289 (P-405) [2012], Nov. 15, 1985.
Aldenhoven Ghislanus M. A. M.
Van Sluys Robert N. J.
Faber Alan
Faller F. Brice
U.S. Philips Corp.
Young W. R.
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