Patent ID: 7002718
Filing Date: 2006-02-21
Classification: G02B

Abstract:
1. An optical deflection device comprising: a base member; a polygon mirror which is formed into a regular polygon and has a reflecting surface on each peripheral end face; a flange member which holds said polygon mirror and rotates with respect to said base member; and a press member which presses said polygon mirror against said flange member, wherein surface roughening is performed for at least one of a holding surface of said flange member which holds said polygon mirror and a held surface of said polygon mirror which is held by the holding surface, and the holding surface and the held surface are bonded with an adhesive, wherein a surface roughness (Ry) of the holding surface and/or the held surface having undergone surface roughening satisfies a conditional expression: where Ry: maximum height (JIS B0601), and wherein the adhesive has a Young's modulus of not more than 1700 MPa at 25° C.