Optical pickup

Details Optical pickup Optical pickup

1994-08-31

1996-04-09

Ben, Loha

Optical: systems and elements

Lens

With support

359814, G02B 702

Patent

active

055067328

ABSTRACT:
An optical pickup which prevents a variation in the maintenance of the neutral point of the objective lens, and has better vibration resistance. The optical pickup comprises a holder holding an objective lens, which is supported by a journal mounted on the outer core and is slidable in the axial direction and rotatable around the axis, a driving coil for focusing and a driving coil for tracking, both of which are mounted on the holder, a focusing magnet and a tracking magnet, both of which are mounted on an outer core and separated from it by a gap, and opposite to the magnets with the coils therebetween. A movable magnet is secured on a line extending from the objective lens on the holder to the journal. In addition, a stationary magnet is secured on the outer core opposite to the magnet, with the different poles being opposed to each other.

REFERENCES:
patent: 4790628 (1988-12-01), Nanno et al.
patent: 4863240 (1989-09-01), Nakajima et al.
patent: 4998802 (1991-03-01), Kasuga et al.

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