Optical pickup

Details Optical pickup Optical pickup

2006-09-28

2009-10-13

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With support

C359S819000, C359S823000

Reexamination Certificate

active

07602565

ABSTRACT:
In an objective lens driving means of an optical pickup, the accuracy of the boundary position of magnets is improved, the generation of angular moment through coils is suppressed, and the inclination of the objective lens is reduced. An optical pickup for reading or writing information on an optical disc using an objective lens includes a lens holder for holding an objective lens, three magnets disposed facing to each of the two sides of the lens holder that are parallel to the focusing direction and the tracking direction, and a yoke for mounting these magnets. The yoke includes a central yoke surface for mounting the central one of the three magnets, and outer yoke surfaces for mounting the outer two of the three magnets. A step is formed between the central yoke surface and each of the outer yoke surfaces.

REFERENCES:
patent: 4736122 (1988-04-01), Opie et al.
patent: 10-334486 (1997-05-01), None
patent: 10-334486 (1998-12-01), None

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