| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanner in which the deformation due to thermal influence of an aperture is suppressed, and to provide an image forming apparatus. SOLUTION: The height H of an aperture reception face 205 serving as an aperture mounting face measured from a base 104a is larger than the height h of an optical path L measured from the base 104a. Thereby, the length from the base 104a to the aperture reception face 205 is made long, and the heat quantity radiated from an aperture fixing base 201 is made large in a process that the heat is conducted from the aperture fixing base 201 to the aperture reception face 205. Thus, the temperature rise in the aperture reception face 205 is suppressed, and the heat quantity transferred from the aperture reception face 205 to the aperture 106 is reduced. As a result, the temperature rise in the aperture 106 is suppressed and the deformation of slits 301a and 301b due to thermal expansion of the aperture is suppressed. COPYRIGHT: (C)2010,JPO&INPIT |
