| 摘要 |
PURPOSE:To detect securely foreign matter sticking on the protection glass surface of a solid-state image pickup element by rotating either of the solid-state image pickup element and a spot light source lamp at right angles to the photodetecting element array of the solid-state image pickup element. CONSTITUTION:The solid-state image pickup element or spot light source is rotated at right angles to the photodetecting element array of the solid-state image pickup element. Then, a spot light beam from the spot light source lamp is incident on the solid-state image pickup element 5, whose photoelectric conversion output signal is amplified by an amplifier 9 and then converted by a binary-coding circuit 10 into a binary-coded signal, which is supplied from an output terminal 11 to a printer part or oscilloscope. Therefore, foreign matter sticking on the protection glass surface of the solid-state image pickup element is detected easily and securely.
|
