| 摘要 |
PROBLEM TO BE SOLVED: To fix a semiconductor laser with respect to a housing appropriately.SOLUTION: An exposure part 51 comprises a semiconductor laser 511, a laser holder 512, a fixing bolt 513, and a housing 59. The semiconductor laser 511 emits a beam. The laser holder 512 holds the semiconductor laser 511. The housing 59 houses members composing the exposure part 51. The two fixing bolts 513 fixes the laser holder 512 onto the housing 59. The housing 59 includes two bolt holes 593 into which the two fixing bolts 513 are respectively screwed. The two fixing bolts 513 are formed such that two screwing directions to the two bolt holes 593 are opposite to each other.SELECTED DRAWING: Figure 4 |
