| 摘要 |
PROBLEM TO BE SOLVED: To provide a photoreceptor sensitivity characteristic evaluation device, including an exposure device having a mirror, with a means for easily and quantitatively detecting and correcting nonuniform contrast of an exposed surface without relying on visual observation. SOLUTION: In the exposure device having the mirror and used to expose a body to be exposed, an exposure area (1) to which light from a light source emitts and a measurement area (2) for the body (sample) to be exposed have the relationship (1)>(2) in terms of size. At least two or more photodiodes are disposed at the counter electrodes of an area between the areas (1) and (2). A difference in photo-electric current output between the photodiodes at the opposite positions is detected. The illuminance of light in the exposure area can be altered so that the difference is equal to or lower than a predetermined value. COPYRIGHT: (C)2008,JPO&INPIT
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