| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of detecting photoreceptor characteristics with high accuracy.SOLUTION: An image forming device includes: a photoreceptor 1; charging means 2 which charges a surface of the photoreceptor; exposure means 3 which exposes the surface of the photoreceptor charged by the charging means, and forms a latent image; spot light irradiation means 12 which irradiates the latent image on the surface of the photoreceptor and its surroundings with spot light; induction current detection means 11 which detects a change in a surface charge amount caused by optical attenuation of the photoreceptor by being irradiated with the spot light as induction current; and latent image measurement means 10 which measures the latent image formed on the surface of the photoreceptor on the basis of a detection result of the induction current detection means. The latent image measurement means irradiates a plurality of measurement positions on the surface of the photoreceptor with spot light by means of the spot light irradiation means simultaneously or substantially simultaneously, and the induction current detection means detects the induction current at the plurality of measurement positions. |
