Patent ID: 8835876
Filing Date: 2014-09-16
Classification: B41F,G01N,G07D

Abstract:
1. An inspection apparatus for a sheet subjected to a process to impart a translucent property, comprising: a support member in which a surface facing the sheet is processed with a material to produce luminescence in a visible light range upon irradiation of ultraviolet rays; a light source configured to irradiate the sheet with light containing the ultraviolet rays; imaging means for imaging the sheet; an ultraviolet filter configured to eliminate the ultraviolet rays in the light emitted from the light source and reflected off the sheet and the support member, and to make only the light having wavelengths longer than wavelengths of the ultraviolet rays incident on the imaging means; and a control device configured to determine appropriateness of the process to impart a translucent property performed on the sheet on the basis of the luminescence in the visible light range produced by the support member and made incident on the imaging means.