| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage of laser beams to the outside and the intrusion of dust through a clearance between a laser light source holding member and an optical device storage case when the holding member is mounted to the outer surface of the optical device storage case. SOLUTION: The light source holding member t0 is positioned in the optical axis direction of laser beams 30 by the contact of a plurality of pairs of abutting parts t5a, u7a, t5b, u7b provided at the light source holding member t0 and the outer surface of the optical device storage case u0 to abut each other. A pair of annular ribs (projecting parts) u6, t4 are formed at a part around a light passing hole u5 in the outer surface of the optical device storage case u0 and at a part around a beam light emitting part t1a of the light source holding member t0, and one annular rib u6 is fitted into the inside of the other annular rib t4 with a space w in the abutting state of the pairs of abutting parts. COPYRIGHT: (C)2009,JPO&INPIT
|
