Position detecting device, the speed detecting device, the movement control unit, a belt conveying device, the rotating body drive, and an image forming apparatus

摘要

PROBLEM TO BE SOLVED: To precisely control rectilinear movement or rotational movement of a moving body such as a conveyance belt or a rotary drum by optically detecting the position on the moving body and the moving speed of the moving body at high accuracy.;SOLUTION: In the position detector including a plurality of light emitting means such as light sources 67, a plurality of light shaping means 73 shaping light emitted by the light emitting means to generate optical beams; and a light reception means such as light receiving elements 68 such as a plurality of photo diodes or photo transistors receiving and photoelectrically converting the light after the light beams generated by the individual light shaping means are reflected by optical marks of the moving body such as the conveyance belt or the rotary drum or transmitted to the optical marks of the moving body, the plurality of light shaping means 73 are integrally held and supported by a common holding member 72 at a constant interval, respectively.;COPYRIGHT: (C)2008,JPO&INPIT