To provide an optical element for an optical pickup, prevented from a deterioration of its characteristics due to a temperature without an increase in the mass; so as to provide good optical characteristics.
The optical element for an optical pickup has: an objective lens 1 for focusing light flux; an aberration correction means for correcting aberration; and a holder for fixing relative positions of the objective lens 1 and the aberration correction means. The aberration correction means has a plurality of aberration correction elements 2 and 3 including a correction element 3 having negative power. The holder has: a first holder 32 for holding at least the aberration correction element 3 having the negative power; and a second holder 31 for holding at least the objective lens 1. The first holder 32 and the second holder 31 each include a plurality of forming gates at positions rotationally symmetric with respect to an optical axis.
JPH06238711A | 1994-08-30 | |||
JP2002092926A | 2002-03-29 | |||
JPH08194146A | 1996-07-30 |
Groundwork Kenichi