Optical element driving device having two permanent magnets...

Details Optical element driving device having two permanent magnets... Optical element driving device having two permanent magnets...

2005-01-04

2005-01-04

Ometz, David L. (Department: 2653)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

C369S044220

Reexamination Certificate

active

06839899

ABSTRACT:
Tracking coils are fixed on side surfaces of a lens holder and a magnetic substance of axisymmetric shape is fixed on a lower surface of the lens holder, being sandwiched by a focusing coil. Moreover, end portions of the magnetic substance are opposed to respective N-pole surfaces of permanent magnets serving as a focusing driving device and a tracking driving device together with the above coils. As a result, a neutral position holding system for an objective lens can be formed of these permanent magnets and the magnetic substance.

REFERENCES:
patent: 4664476 (1987-05-01), Kasuga
patent: 4790628 (1988-12-01), Nanno et al.
patent: RE33548 (1991-03-01), Kime
patent: 5191484 (1993-03-01), Yeon et al.
patent: 5659525 (1997-08-01), Miyamae et al.
patent: 5870371 (1999-02-01), Tsuchiya et al.
patent: 6195314 (2001-02-01), Inui et al.
patent: 6288853 (2001-09-01), Kamada
patent: 2-42215 (1990-03-01), None
patent: A-7-110955 (1995-04-01), None
patent: 9-54967 (1997-02-01), None
patent: 10-3674 (1998-01-01), None
patent: 10-64074 (1998-03-01), None
patent: 10-134381 (1998-05-01), None
patent: 10-283647 (1998-10-01), None
patent: 2001-34972 (2001-02-01), None
patent: 2001-67693 (2001-03-01), None
patent: 3088532 (2002-06-01), None

Affiliated with

Also associated with

Rating

Optical element driving device having two permanent magnets... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical element driving device having two permanent magnets..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical element driving device having two permanent magnets... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3400244