Optical scanning apparatus and image forming apparatus...

Details Optical scanning apparatus and image forming apparatus... Optical scanning apparatus and image forming apparatus...

2011-08-09

2011-08-09

Meier, Stephen D (Department: 2853)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S241000, C347S256000

Reexamination Certificate

active

07995088

ABSTRACT:
A optical scanning apparatus includes a surface emitting type laser diode, a collimator lens which converts the emitted laser beam into an substantially parallel laser beam, a stop member which shapes the substantially parallel laser beam into a desired shape, a polygon mirror which deflects and scans the shaped laser beam, an electro-optical crystal member which is provided in the optical path between the stop member and the polygon mirror, and deflects the shaped laser beam by an applied voltage, a light amount sensor which detects the amount of laser beam deflected by the electro-optical crystal member, and a light amount control unit which controls the amount of laser beam emitted from the laser diode while repeatedly comparing the detected light amount obtained from the light amount sensor with a light amount corresponding to a reference voltage for control light amount.

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