Optical pickup having an aberration correction function

Details Optical pickup having an aberration correction function Optical pickup having an aberration correction function

2008-10-24

2011-12-06

Klimowicz, Will J (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C359S823000

Reexamination Certificate

active

08072869

ABSTRACT:
A spherical aberration correction mechanism includes a plurality of aberration correction lenses, a movable portion in which the aberration correction lens is held, a fixed portion in which the movable portion is arranged so as to be slidable as well as the aberration correction lens is held, a shaft supporting the movable portion so as to be rotatable about the axis as well as to be slidable in the axial direction, a feed screw having spiral grooves, an engaging portion having convex portions to be engaged with the spiral grooves from one direction and a coil spring fitted to the outside of the shaft, pressing the movable portion in the axial direction. The coil spring has a rotation prevention portion engaged with the fixed portion and a torque biasing portion engaged with the movable portion, and the coil spring is installed in a twisted state in advance.

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English Machine Translation of JP 2007-101634 (Ishimasa, Lens Drive Device, published on Apr. 19, 2007).

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