| 摘要 |
PROBLEM TO BE SOLVED: To eliminate an influence of a tilt which causes a failure in reading and writing of information by correcting a wave front aberration due to the tilt by using a wave front aberration correction mirror which uses a piezoeleetric element. SOLUTION: In an optical pickup which is a device for reading and writing information on an optical disk and has a correction means for an aberration of a laser beam on the optical axis of the laser beam, the mirror as an aberration correction means is composed of a thin silicone substrate and a thin piezoelectric substrate or a piezoelectric thin film. An insulating layer is provided between the silicone substrate and the thin piezoelectric substrate or the piezoelectric thin film, at least one side face of an electrode which comes into contact with the both faces of the thin piezoelectric substrate or the piezoelectric thin film is divided, and the face of the mirror is deformable according to the divided electrode pattern. |
