| 摘要 |
PROBLEM TO BE SOLVED: To prevent irradiation windows from being soiled without making an apparatus large in size, and also, to easily clean the irradiation windows. SOLUTION: An upper cover 216 with the irradiation windows 212 is slidably attached to a housing 211 of a laser exposure apparatus. In the case of exposing a photoreceptor located outside, each irradiation window 212 is located on the optical path of a light beam emitted from a cylindrical lens 203 so as to transmit the light beam to the outside. In the standby state illustrated in FIG, each irradiation window 212 is located in a position deviated from the optical path. Also in the standby state, a cleaning brush 215 comes in contact with the outer surface of the irradiation window 212. The cleaning brush 215 can be moved in a main scanning direction while held on a guiding rail 214. An operator or the like makes the cleaning brush 25 move along the guiding rail 214, thereby the irradiation window 21 can be cleaned while the cleaning brush 215 is made to slidably move to the irradiation window 212. COPYRIGHT: (C)2009,JPO&INPIT
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