Optical head device and optical recording/reproducing apparatus utilizing the same
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United States of America Patent
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Dec 23, 2008
Grant Date -
Jan 11, 2007
app pub date -
Jun 13, 2006
filing date -
Jul 7, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an optical head device in which the influence of mechanical vibration generated at resonance frequencies of high orders (second and higher orders) can be eliminated and an optical recording/reproducing apparatus utilizing the same. Sidewalls are formed from both ends of a sidewall constituting the top side of a trapezoidal contour of a lens holder portion, the sidewalls extending in the form of a fan to define a predetermined angle between them. A damping system includes a weight in the form of a metal thin plate and a visco-elastic adhesive for bonding the weight to the sidewalls. The visco-elastic adhesive transfers vibration of the lens holder in the direction of an optical axis of an objective lens to the weight and has a viscous damping property which damps vibration of the weight in the direction of the optical axis.
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