Traditional Culture Encyclopedia - Photography and portraiture - What is the function of rotating prism to compensate the prism in high-speed movie camera?
What is the function of rotating prism to compensate the prism in high-speed movie camera?
Therefore, in order to achieve high-speed photography, in principle, it is necessary to increase the frequency of intermittent motion of the film as much as possible. However, due to the mechanical structure and strength of the film, it is difficult to achieve stable intermittent motion with extremely high frequency. Even if the kinetic energy of the retractor is realized, the film will be pulled off. So the prism shutter mechanism appeared.
The prism shutter changes the motion mode of the film. After passing through a high-speed rotating prism, the film keeps moving. At this time, the film can reach a high speed of motion, and the rotation of the prism is synchronized with the motion of the film, which also compensates the picture deformation caused by the motion, thus achieving a high number of shooting frames.
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