Patent ID: 8995026
Filing Date: 2015-03-31
Classification: H04N

Abstract:
1. An image reading apparatus, comprising: an image reading unit which has a light source irradiating light to a sheet conveyed along reading glass, and an image reading element reading an image by reflected light from the sheet; a conveyance guide portion which guides a sheet and which is disposed in a position, that corresponds to the image reading unit, with the reading glass interposed between the conveyance guide portion and the image reading unit; and a correction unit which corrects image information obtained by reading a sheet by the image reading unit based on reflected light that is emitted from the light source and reflected on a reflecting surface of the conveyance guide portion; wherein the reflecting surface has surface properties having a ten-point average surface roughness Rz and an average distance S between local peaks satisfying the following requirements, 3.0 μm<Rz, and S<0.09 mm.