Optical scanner having laser diode as light source
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United States of America Patent
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Aug 30, 1994
Grant Date -
N/A
app pub date -
Apr 24, 1992
filing date -
Apr 26, 1991
priority date (Note) -
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Abstract
An optical scanner includes a light source including a laser diode for emitting a laser beam, and an optical deflector such as a rotary polygonal mirror for deflecting the laser beam to thereby produce a scanning laser beam. The laser diode is protected from being overheated by arranging the light source in a heat insulating chamber or by cooling the light source with the air flow circulated by the rotation of the rotary polygonal mirror in cooperation with a curved guide plate.
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