| 摘要 |
PURPOSE:To light on a platen glass uniformly by increasing the illuminance of corner parts on the platen glass. CONSTITUTION:Light from a flash light source 5 is reflected repeatedly in a high-reflection cavity 3 to enter the platen glass 4 at the upper part, but direct light from the flash light source 5 after being reflected at both end sides of a reflector strikes curved parts at the lower parts of a reflector 8 provided opposite to the reflector and is reflected toward the corner parts of the platen glass 4 at the upper parts that the light from the light source 5 is hard to reach. Consequently, the illuminance at the corner parts is increased. |
