Patent ID: 7317471

Claim:
An image forming apparatus having a laser optical unit for forming a latent image on a photoconductor via an optical system for scanning light emitted from a laser beam source according to input information, comprising: a toner image forming unit for forming a toner image on said photoconductor, a transfer unit for transferring said toner image on said photoconductor onto a sheet of paper, a fixing unit for heating and fixing said toner image on said sheet of paper, and a conveying unit for ejecting said sheet of paper on which said toner image is fixed, a scanning light emitting window installed on said laser optical unit, two electrodes arranged along both sides in a longitudinal direction of said scanning light emitting window, one of said electrodes being applied with a positive bias voltage and the other one of said electrodes being applied with a negative bias voltage, and a power source for applying a voltage between said electrodes.