IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a simply-structured low-cost image forming apparatus capable of stably fixing a lens without increasing the number of components by achieving both of high adhesion strength and attitude stability in a structure wherein a side circumferential face of the lens having two refracting faces and the side circumferential face in the direction orthogonal to the two refracting faces is fixed in a lens supporting part arranged in a device body by an adhesive. SOLUTION: A columnar collimator lens 4 having the refracting faces 51 and 52 and the side circumferential face 53 in the direction crossing the refracting faces 51 and 52 is mounted on a mounting face 21 of the lens supporting part 20 arranged in a casing 1 and extended in the direction orthogonal to the optical axis P direction of the lens 4 and fixed by the adhesive 60. In the mounting face 21, the width L in the optical axis P direction in the contact position with the side circumferential face 53 of the collimator lens 4 is narrower than the width L1 of the optical axis P direction in the contact position with the mounting face 21 on the side circumferential face 53 (L