| 摘要 |
A reader-printer has a first mirror rotatable to a first position in which it is capable of forming a reader optical path for projecting an image light onto a screen and a second position in which it is capable of forming a printer optical path for projecting the image light onto a photosensitive surface, a second mirror disposed in the reader optical path for disposed in the reader optical path for directing the light from the first mirror to the screen, a third mirror disposed in the printer optical path for directing the light from the first mirror to the photosensitive surface, a driving device for rotating the first mirror to the first position and the second position, and a detecting device disposed outside the reader optical path and the printer optical path for receiving the reflected light from the first mirror during the rotation of the first mirror and detecting the image density.
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