| 摘要 |
PROBLEM TO BE SOLVED: To prevent dust from sticking to an optical scanner through a simple structure by providing a laser light source, light deflector, scanning optical system, and optical members installed on the outer periphery of the housing, and by vibrating the optical members. SOLUTION: The scanner is equipped with a polygon motor 2 which is a light deflector for deflecting outgoing light from a laser light source, optical glass 3 as a light emitting port installed facing the outer periphery of the housing 1, vibrator 4, transmitting member 5 for transmitting the vibration of the vibrator 4 or the like. The rotation of the vibrator 4 is then transmitted to the glass 3 as the vibration through a joint. The vibrator 4 is constructed by providing a cam plate for a motor that is used in a paper or the like for telling incoming call through the vibration, vibrating the transmitting member 5 by the rotation of the cam plate at the time of no disturbance to image formation such as the time when no optical scanning is performed, and vibrating the glass 3 on the transmitting member 5. The vibration of the glass 3 makes it hard for dust to stick to the surface. As a result, without increase in the number of parts to a great extent and without increase in the cost, the surface of the optical members can be always kept clean.
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