Optical pickup
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United States of America Patent
Stats
-
Dec 14, 2010
Grant Date -
Mar 6, 2008
app pub date -
Aug 28, 2007
filing date -
Aug 30, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical pickup includes a first objective lens, a second objective lens having a numerical aperture different from that of the first objective lens, and an objective lens holder. The first objective lens is attached to the objective lens holder via a spacer that has a cylindrical shape and is provided with a lens receiving portion of a stepped shape for receiving the first objective lens, a protruding portion having cushioning properties that protrudes from the upper surface, and a salient portion having a spherical shape formed at the lower surface. The protruding portion is formed so that a tip thereof is closer to an optical disc medium than any other part of the objective lens holder.
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