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| intermittent mechanism ： ウィキペディア英語版 |
intermittent mechanism
The intermittent mechanism or intermittent movement is the device by which film is regularly advanced and then held in place for a brief duration of time in a movie camera or movie projector. This is in contrast to a continuous mechanism, whereby the film is constantly in motion and the image is held steady by optical or electronic scanning methods. The reason the intermittent mechanism "works" for the viewer is because of a phenomenon called persistence of vision.
==History==
Intermittent mechanisms were first used in sewing machines, in order for the fabric to be fed through correctly - ensuring it is stationary as each stitch is made, while moving the required distance between stitches.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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