Objective lens driving device

Details Objective lens driving device Objective lens driving device

2006-05-30

2006-05-30

Nguyen, Hoa T. (Department: 2652)

Optical: systems and elements

Lens

With support

C369S044220

Reexamination Certificate

active

07054078

ABSTRACT:
When a lens holder2A is in a neutral position, a ratio of a gap between opposing surfaces of one tilt magnet10a,10band one tilt coil5which oppose to each other, to a radial direction thickness of the tile magnet10a,10b,is in the range of 1/2 to 1/3. In at least one tilt coil of the tilt coils, a ratio of a light axis direction inside distance of the tilt coil to a light axis direction height of the tilt magnet, is in the range of 1/1.5 to 1/4. With this arrangement, even if the objective lens is shifted in a tracking direction or in a focusing direction, variation in the sensitivity and the linearity of the radial tilt movement is small, and an internally accessible area is increased.

REFERENCES:
patent: 6449229 (2002-09-01), Kim et al.
patent: 2001/0030815 (2001-10-01), Suh
patent: 2003/0193854 (2003-10-01), Lee et al.
patent: 2-289927 (1990-11-01), None
patent: 9-231595 (1997-09-01), None
patent: 11-306570 (1999-11-01), None

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