Showscan
Showscan is a film process that was developed by Douglas Trumbull in the 1970s and 1980s. Here, 70 mm film with a perforation step of five perforation holes is used, but showscan films run with a frame rate of 60 fps, which is 2.5 times as fast as normal cinema with 24 fps. This creates a “flow” similar to that of video recordings with interlacing , where 50 or 60 fields per second are shown depending on the video standard. However, Showscan shows an image that not only offers significantly better motion resolution than traditional cinema film, but is also high-resolution.
The showscan frame rate of 60 fps was determined experimentally by Trumbull. A limit image frequency was sought, from which - with further frequency increase - viewers no longer perceive an improved motion resolution.
Nowadays, Showscan is mainly used for short motion simulator films (ride films) in connection with movable benches.
Showscan Film Corporation went bankrupt in 2002, and the process was then taken over by a new company, Showscan Entertainment.