Variable-shape mirror and optical pickup device therewith

Details Variable-shape mirror and optical pickup device therewith Variable-shape mirror and optical pickup device therewith

2006-04-19

2008-09-09

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Mirror

Including specified control or retention of the shape of a...

Reexamination Certificate

active

07422335

ABSTRACT:
In a variable-shape mirror of which the shape of the mirror surface can be varied, a mirror portion is bonded only to a fixed portion and not to a piezoelectric element. When the piezoelectric element is not operating, the mirror portion, receiving a predetermined force from the piezoelectric element, makes contact with the piezoelectric element. When the piezoelectric element contracts, the mirror portion tends to restore its original shape by its counterforce. Thus, even when the piezoelectric element contracts, the contact between the mirror portion and the piezoelectric element is held, and hence the electric conduction to the piezoelectric element is maintained.

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