| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent dustproof glass from being soiled and also to clean it by a simple constitution. <P>SOLUTION: A shielding means for shielding the dustproof transparent member of an optical unit is provided with a cleaning member, and the cleaning member is moved because the shielding means is moved in accordance with the opening and closing of the door of an apparatus, so that the dustproof transparent member is cleaned. <P>COPYRIGHT: (C)2004,JPO |
