Optical pickup device having fixed and movable optical systems

Details Optical pickup device having fixed and movable optical systems Optical pickup device having fixed and movable optical systems

1990-02-16

1992-08-18

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4417, 2502015, G11B 700

Patent

active

051405725

ABSTRACT:
A separation type optical pickup device which comprises a fixed optical system and a movable optical system which is separated from the fixed system. The fixed optical system is unmovable with respect to an optical information recording medium. The fixed system includes an optical beam emission system and a deflection member which deflects a beam emitted from the emission system. The deflection member is disposed on an optical axis of the beam and rotatable about a rotary axis which is parallel to the optical axis of the beam. The movable optical system is movable with respect to the information recording medium and guides the beam transmitted from the fixed optical system to the recording medium.

REFERENCES:
patent: 4507766 (1985-03-01), Saimi et al.
patent: 4688201 (1987-08-01), Towner et al.
patent: 4959824 (1990-09-01), Ueda et al.
patent: 4977552 (1990-12-01), Gotoh

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