| 摘要 |
PURPOSE:To enable the detection of dirts and flaws on a film original and an optical member with relatively simple construction, by providing a wavelength selecting means adapted to mainly transmit infrared rays, a read control means and a detecting means. CONSTITUTION:When a wavelength selecting means (a) adapted to mainly transmit infrared rays is inserted into an optical path of a reading optical system, a scanning means is driven continuously by a read control means (b) to read image information of a film original from an optoelectric transducer. This optoelectric transducer is used in common to read image. Then, on the bass of the image information thus read out, a detecting means (c) detects the position of dirts and flaws on the film original or the like. This eliminates possible deviation in the position between a visible light image data and infrared rays image data, thereby inhibiting detection errors caused by directs and edge of flaws.
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