Electromagnetic objective lens driving apparatus of optical data

Details Electromagnetic objective lens driving apparatus of optical data Electromagnetic objective lens driving apparatus of optical data

1993-07-28

1995-05-23

Heinz, A. J.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 4414, G11B 2102, G11B 708

Patent

active

054187729

ABSTRACT:
An electromagnetic driving apparatus of an objective lens in an optical data recording and reproducing apparatus including a movable carriage, and an objective lens holder which supports the objective lens to converge laser beams onto the optical disc and which is supported on the carriage to move in focusing and tracking directions. Focusing and tracking coils are provided on the objective lens holder, together with a magnetic circuit including permanent magnets and a yoke member. The yoke member is made of a single piece including a magnetic shield wall having a laser transmission hole opposed to the optical disc, a plurality of yoke walls extending substantially perpendicularly to the magnetic shield wall towards the carriage, and a plurality of mounting flanges extending from the yoke walls to lie on the carriage, so that the mounting flanges can be secured to the carriage.

REFERENCES:
patent: 4641296 (1987-02-01), Mizunoe et al.
patent: 4669823 (1987-06-01), Iguma et al.
patent: 4796248 (1989-01-01), Ozaki et al.
patent: 5103438 (1992-04-01), Masunaga et al.
patent: 5134527 (1992-07-01), Cou
patent: 5187702 (1993-02-01), Takahashi
patent: 5200940 (1993-04-01), Goto et al.

Affiliated with

Also associated with

Rating

Electromagnetic objective lens driving apparatus of optical data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electromagnetic objective lens driving apparatus of optical data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromagnetic objective lens driving apparatus of optical data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2145652