Image reading apparatus

摘要

An image reading apparatus in which an optical system is formed into a unit to make the entire construction compact and facilitate positioning of each component. The optical unit comprises a block structure provided with mounts for supporting a light source base, a lens and a sensor base, respectively. An array of light emitting elements is arranged as a light source on the light source base, and da CCD image sensor is arranged on the sensor base. An end of the lens is positioned at the document reading zone and the other end of the lens is positioned adjacent the sensor base.