Optical pickup

Details Optical pickup Optical pickup

1992-12-23

1993-08-31

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 4415, 369247, 359814, 359824, G11B 708, G02B 702

Patent

active

052415287

ABSTRACT:
An optical pickup having an optical disk (22); a laser diode (11); an objective lens for forming a beam spot on the optical disk; an optical element for guiding a beam from the laser diode to the objective lens; a photodetector for converting a reflected beam from the optical disk into an information signal and an error signal; an optical holder to which at least the objective lens is secured; a first circuit board (17) to which at least the laser diode and the photodetector are attached; an optical base to which the first circuit board (17), is secured; at least the laser diode, the optical element and the photodetector being sealed by the optical holder and the optical base so as to form an optical unit; a stationary member; a second circuit board (28) secured to the stationary member; an elastic support member (21) for elastically supporting the optical unit, which is electrically connected to the first and second circuit boards; at least one permanent magnet (23) secured to the optical unit; a first drive member for driving the optical unit in a direction substantially parallel to a rotational axis of the optical disk; and a second drive member for driving the optical unit in a direction substantially perpendicular to the rotational axis of the optical disk.

REFERENCES:
patent: 4646283 (1987-02-01), Ito et al.
patent: 4702555 (1987-10-01), Iguma et al.
patent: 4960321 (1990-10-01), Takahashi
patent: 5010246 (1991-04-01), Tsuyuguchi et al.
patent: 5161067 (1992-11-01), Tomiyama et al.

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