Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1995-01-23
1997-01-28
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4416, 359823, G11B 709
Patent
active
055983863
ABSTRACT:
A focus/tracking actuator for controlling the respective focus and tracking positions of a lens used to direct a focused beam of radiation onto a desired data track on a moving recording element comprises a pair of moving coil-type linear motors. Each of the motors comprises a coil of wire disposed in a magnetic air gap and adapted to move therein in response to an applied current flow. According to the invention, the respective masses of the motor coils are optimized to achieve maximum acceleration with minimum power comsumption. Preferably, the coils have a combined mass substantially equal to the mass of the moving payload, which includes the lens assembly and its movable support.
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patent: 5428589 (1995-06-01), Shtipelman
Barnard James A.
Shtipelman Boris A.
Bilinski Peter J.
Eastman Kodak Company
Tran Thang V.
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