Electrophotographic apparatus and electrophotographic method featuring a photosensitive member having a linear EV characteristic

摘要

An electrophotographic apparatus has a light scanning device for guiding a light beam onto a rotary polygon mirror and deflecting the light beam; and a recording medium which the light beam deflected by the light scanning device scans to form an image. The recording medium is an a-Si base photosensitive member. The electrophotographic apparatus satisfies a relation represented by Eq. (I) below;where D is a diameter of the light beam at a reflecting surface of the rotary polygon mirror and W is a width in a main scanning direction of a deflecting surface of the rotary polygon mirror.