SCANNING OPTICAL SYSTEM UNIT, APPARATUS OF MEASURING OPTICAL CHARACTERISTIC, METHOD OF MEASURING OPTICAL CHARACTERISTIC, METHOD OF ADJUSTING SCANNING OPTICAL SYSTEM UNIT AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To measure the positions of beams between stations without dropping a rotating polygon body even when a scanning optical system unit of a type that emits a scanning line (light beam) from the lower to upper positions (from downstream to upstream sides in the gravitational direction) is turned over upside down.;SOLUTION: The scanning optical system unit is designed by assuming that the unit is installed so that the light beam is emitted from the downstream to the upstream sides in the gravitational direction, and a member is provided for preventing the dropout of the rotating polygon body when the unit is install in a way that the light beam is emitted from the upstream to the downstream sides in the gravitational direction.;COPYRIGHT: (C)2008,JPO&INPIT