| 摘要 |
PURPOSE:To enable a sharp image during film movement to be observed on a screen by providing a speed detecting means which detects the moving speed of a film and holding the film in a predetermined position while the film is moving at a low speed. CONSTITUTION:A feed reel 1 and a take-up reel 2 are coupled to motors 12, 13 respectively. As one of the motors is driven, a film F passes between guide plates 8 and 9, and is illuminated by a lamp 6, so that images are projected onto a screen 11. The guide plate 8 on the lower side is held fixed, and the guide plate 9 on the upper side is provided movably from the 1st position near the film moving passage to the 2nd position part from the moving passage. When the speed detected with the film moving speed detector is low, the film guide plate 9 is in the 1st position and therefore the film plane is maintained roughly plane during the movement, thus the sharp images are observed on the screen 11. |
