Optical head device
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United States of America Patent
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N/A
Issued Date -
Dec 15, 2005
app pub date -
May 25, 2005
filing date -
May 26, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical head device including a semiconductor laser, a raising mirror for deflecting a laser beam emitted from the semiconductor laser to an optical recording disk, a light receiving element for monitor for monitoring the laser beam to control an output of the semiconductor laser. The major axis of an elliptical shaped optical spot which is converged on the optical recording disk is obliquely oriented with respect to both a radial direction of the optical recording disk and a tangential direction of a track of the optical recording disk, and the light receiving element for monitor is disposed behind the raising mirror to receive a light beam of an end part in a major axis direction of a far field pattern of the laser beam which is leaked over an edge side of the raising mirror.
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