Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1987-02-24
1988-08-30
Corbin, John K.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
350255, 369 45, G02B 704
Patent
active
047671874
ABSTRACT:
The invention relates to an electro-optical device for optically scanning an information carrier, comprising a stationary frame, a movable optical holder, in which an objective having an optical axis is eccentrically mounted, a first electromagnetic actuator for translating the optical holder along a pivotal axis and a second electromagnetic actuator for pivoting the optical holder about this pivotal axis. Each of the actuators comprises a first actuator element secured to the frame and a second actuator element secured to the holder, the first and the second actuator elements cooperating with each other via air gaps. The optical holder is formed with a bore which extends parallel to the optical axis and in which the second actuator element of the second actutor is secured and in which the first actuator element which cooperate with said second actuator element extends with clearance. The second actuator element of the second actuator also functions as the balancing mass.
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patent: 4467463 (1984-08-01), Yano
patent: 4473274 (1984-09-01), Yano et al.
patent: 4566089 (1986-01-01), Kime
patent: 4571026 (1986-02-01), Maruta
patent: 4664476 (1987-05-01), Kasuga
patent: 4669823 (1987-06-01), Iguma et al.
patent: 4687296 (1987-08-01), Terayama et al.
Blankers Petrus J.
Gijzen Wilhelmus A. H.
Van Vroenhoven Petrus A. W. H.
Ben Loha
Corbin John K.
U.S. Philips Corp.
Wieghaus Brian J.
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