Effective reading width configuration manner null of manuscript reader and this

摘要

PROBLEM TO BE SOLVED: To obtain the original reader in which a mount position of a read device is easily adjusted with high accuracy by providing a point light source in the middle of an original read range and adjusting the mount position of the read device based on a position of a light made incident on the read device from the point light source at a shortest distance. SOLUTION: An LED 3 being a point light source is provided at a position in nearly axis symmetry to the light source 2 on an axis of a straight line tying a white board 1 and a CCD 4 in a read section 100 consisting of the white board 1, the light source 2, a lens 5 and the CCD 4. In the case of the CCD mount position adjustment mode, when a light emitted from the LED 3 enters the CCD 4, the original reader discriminates the position of the CCD 4 based on a position of the light emitted from the +LED 3 appearing at an output of the CCd 4 and an error from a normal mount position is displayed. A worker adjusts the mount position so as to make the display of the error zero. Thus, the original reader is obtained in which the mount position of the CCD 4 is easily adjusted with high accuracy.