Patent ID: 7548355

Claim:
An image scanning apparatus comprising: a light source adapted to emit visible light and invisible light; a scanning unit adapted to scan light emitted by said light source and transmitted through a transparent film original; and a controller adapted to control said light source and the scanning unit, wherein said light source and said scanning unit are arranged at opposite sides across the transparent film original, and an operation mode that skips a scan of the invisible light transmitted through the transparent film original to obtain information related to an abnormality on the transparent film original before or after executing a scan of the visible light transmitted through the transparent film original is selectable, when said scanning unit scans the visible light transmitted through the transparent film original, said scanning unit executes a rough scan for roughly scanning the visible light transmitted through the transparent film original, and a fine scan for scanning the original image under a required condition on the basis of information scanned in the rough scan, and said scanning unit makes the invisible light scan at a higher speed than the fine scan.