Optical: systems and elements – Lens – With support
Patent
1993-01-12
1995-08-15
Shafer, Ricky D.
Optical: systems and elements
Lens
With support
359814, 369 4415, G02B 702, G11B 709
Patent
active
054424909
ABSTRACT:
An objective lens holder is movably attached at a fixing portion of a base by means of a support body for driving the objective lens. A pair of arched permanent magnets are fixed along an arched outer circumference of the objective lens holder. Focusing coils and tracking coils are fixed on the base to oppose, with a small gap, the permanent magnets. The objective lens holder can slide in the focusing direction along an axial line parallel to the optical axis of the objective lens, and it is also rotatable in the tracking direction about the axial line. Since the gap between the permanent magnets and each of the coils is minimized, the electromagnetic force generated in each coil can be fully utilized, and sensitivity of the control signal applied to each coil is improved. Further, the size of the optical pickup apparatus in which the objective lens driving apparatus is incorporated is reduced.
REFERENCES:
patent: 4479051 (1984-10-01), Musha
patent: 4664476 (1987-05-01), Kasuga
patent: 4752117 (1988-06-01), Ichikawa et al.
patent: 4759005 (1988-07-01), Kasahara
patent: 4988165 (1991-01-01), Ishii et al.
patent: 5103438 (1992-04-01), Masunaga et al.
patent: 5111339 (1992-05-01), Hagiwara
patent: 5130854 (1992-07-01), Suzuki
patent: 5184002 (1993-02-01), Chu
Patent Abstracts of Japan, vol. 10, No. 48 (P-431), Sep. 28, 1985.
Nguyen Thong
Shafer Ricky D.
Sharp Kabushiki Kaisha
LandOfFree
Objective lens driving apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Objective lens driving apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Objective lens driving apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2186833