Claims
- 1. An optical pickup deformable mirror used for correcting a spherical aberration caused by a difference in thickness of a cover glass of a recording medium, wherein the optical pickup deformable mirror is deformed into a rotation-symmetrical surface obtained by rotating a curve represented by the following expression f(r):
- 2. An optical pickup deformable mirror according to claim 1, wherein f(r) is represented by the following expression:
- 3. An optical pickup deformable mirror according to claim 1, wherein g(r) satisfies |g(r)|≦0.5 μm.
- 4. An optical pickup deformable mirror according to claim 3, wherein f(r) is represented by the following expression:
- 5. An optical pickup deformable mirror according to claim 1, wherein a has a value that satisfies |ar2|≦0.005 mm.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2001-355136 |
Nov 2001 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2001-355136, filed Nov. 20, 2001, the entire contents of which are incorporated herein by reference.