| 摘要 |
PURPOSE:To make clear copying of a stereoscopic part possible by stopping down a variable diaphragm means by the quantity of light equal to the quantity of exposure corresponding to the difference of maximum quantity of light emission and optimum quantity of light emission making the quantity of light emission of an illuminating lamp maximum at the time of stereoscopic copying. CONSTITUTION:In a state of plane copying switching, a controlling device 34 opens a variable aperture means 31 and controls an illuminating lamp 7 to optimum quantity of light emission. In a state of solid copying switching, the controlling device 34 makes the illuminating lamp 7 maximum quantity of light emission, and stops down the variable diaphragm means 31 by the quantity of light equal to the quantity of exposure corresponding to the difference of maximum quantity of light emission and optimum quantity of light emission. Thereby, maximum quantity of light emission raised from optimum quantity of light emission by a margin in safety etc. brought about by small frequency of use and small number of times of continuous use is obtained, and the depth of focus of an image forming lens 13 is deepened raising the stop value by the surplus quantity of exposure, and the stereoscopic part of a subject can be copied clearly. |
