Optical head device having an objective lens holder supported by composite wires and single wires
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 26, 2008
Grant Date -
Jan 13, 2005
app pub date -
Apr 23, 2004
filing date -
Apr 24, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical head device including a lens holder which holds an objective lens, six wires for supporting the lens holder and a holder support member which movably supports the lens holder by the six wires in a tracking, focusing and tilt direction. The six wires comprise two pairs, each of the pairs comprising a composite wire composed of two wires and a single wire composed of one wire which are respectively disposed on an upper side and a lower side of the lens holder in the focusing direction. The spring constant of the composite wire is set to be approximately equal to a spring constant of the single wire. Alternatively, the six wires may be disposed on the same circumference with respect to a drive center in the tilt direction or the spring constant of one wire of the pair may be set to be smaller than spring constants of the other two wires of the pair.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully