Patent ID: 6538678
Filing Date: 2003-03-25
Classification: B41J,G02B,G03G,H04N

Abstract:
An image forming apparatus comprising:an image bearing member for bearing an electrostatic image; a light source for emitting a laser beam modulated according to an image signal; a rotational polygon mirror for reflecting the laser beam emitted by said light source in order to scan said image bearing member, wherein a width in a rotational direction of a reflecting surface of said rotational polygon mirror is narrower than a beam width of the laser beam incident on said rotational polygon mirror, and a potential of the image bearing member exposed by the laser beam reflected and scanned by said rotational polygon mirror is higher on an end part than on a central part in a scanning direction; a developer for developing a non-exposed part of an electrostatic image on said image bearing member; a potential detector for detecting the potential of said image bearing member; and a development controller for controlling developing conditions of said developer based on the potential detected by said potential detector.