Optical scanning device for scanning laser beam focused on image-forming surface
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United States of America Patent
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-
Mar 28, 1995
Grant Date -
N/A
app pub date -
Apr 16, 1993
filing date -
Apr 17, 1992
priority date (Note) -
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Abstract
A laser beam emitted from the beam emitting unit is deflected for scanning by a reflector rotated by a scanner motor. The deflection scanning beam passes through a meniscus lens device provided close to the reflector, and converges the laser beam on an image-forming surface. The meniscus lens device has an incident surface, a radius of curvature of which is set smaller than that of an output surface thereof, with a convex surface thereof facing the image-forming surface. The laser beam emitting unit, the reflector, the scanner motor, and the meniscus lens device are all integrally built in a housing.
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