Patent ID: 8168947
Filing Date: 2012-05-01
Classification: G03G,H01J

Abstract:
1. An electrostatic latent image evaluation device, comprising: an optical scanner configured to irradiate laser light of a wavelength of 400 nm-800 nm on a photoreceptor sample, and form an electrostatic latent image; an electron gun configured to irradiate a charged particle beam to the photoreceptor sample having the electrostatic latent image, and surface electric charge distribution or surface electric potential distribution; a detector configured to detect an electron emitted from the photoreceptor sample by the irradiation of the charged particle beam; and an electrostatic latent image evaluation section configured to calculate areas of a plurality of electrostatic latent images according to signals detected by the detector, and to evaluate the photoreceptor sample according to a change in the calculated areas, and wherein the electrostatic latent image evaluation section is configured to calculate, as an evaluation value of the photoreceptor sample, a ratio of the areas of the plurality of electrostatic latent images, where the plurality of electrostatic latent images are formed by the laser light, with the exposure energy density of the laser light being changed from a standard value.