| 摘要 |
A perforation detector of a camera comprises a light emitting unit for emitting light to a film, a photo-sensor for sensing reflected light from the film to produce a signal representing a sensed light intensity, the light intensity of the reflected light varying with presence or absence of a perforation at a reflection area of the film, a detection unit for comparing the signal from the photo-sensor with a predetermined value to detect a perforation of the film, and a control unit for controlling the light intensity of the light emitting unit in accordance with the signal from the photo-sensor.
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