| 摘要 |
PURPOSE:To enable imprinting of plural picture images between the perforations of a film, by disposing plural pieces of photosensors in the positions facing the perforations of the film and detecting the perforations photoelectrically. CONSTITUTION:The photoreflector 1' of the 2nd photoelectric detection circuit I2 and the photoreflector 1 of the 1st photoelectric detection circuit I1 are disposed at a 1/2 pitch interval. When the feeding of a film is started and the perforations thereof are moved upon photographing, the perforations are detected with photoelectric detection circuits I1, I2 which generate a motor stopping signal so as to stop a motor. One perforation is first detected with the 1st circuit I1, and is then detected with the 2nd circuit I2. The film is fed by each 1/2 of the spacing between the perforations. Since the photographing of plural frames between the perforations is made possible, the film is usable effectively and the frequency of exchanging the film is decreased. |
