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by A high speed camera is a device used for recording fast moving objects as a photographic image(s) onto a storage media. After recording, the images stored on the media can be played back in slow-motion. Early high speed cameras used film to record the high speed events but today, high speed cameras are entirely electronic using either a charge-coupled device (CCD) or a CMOS image sensor, recording typically over 1000 frames per second into DRAM and playing slowly images back to study the motion for scientific study of transient phenomena.[1] A high speed camera can be classified as (1) a high speed film camera that records to film, (2) a high speed framing camera that records a short burst of images to film/digital still camera, a high speed streak camera that records to film/digital memory or (3) a high speed video camera recording to digital memory.
A normal motion picture is filmed and played back at 24 frames per second, while television uses 25 frames/s (PAL) or 29.97 frames/s (NTSC). High speed cameras can film up to a quarter of a million frames per second by running the film over a rotating prism or mirror instead of using a shutter, thus reducing the need for stopping and starting the film behind a shutter which would tear the film stock at such speeds. Using this technique one can stretch one second to more than ten minutes of playback time (super slow motion). The fastest cameras are generally in use in scientific research, military test and evaluation, and industry. An example of an industrial application is crash testing to better document the crash and what happens to the automobile and passengers during a crash. Today, the digital high speed camera has replaced the film camera used for Vehicle Impact Testing [2]. Television series such as MythBusters and Time Warp often use high speed cameras to show their tests in slow motion. The fastest high speed camera has the ability to take pictures at a speed of 200 million frames per second.
Read more: http://en.wikipedia.org/wiki/High-speed_camera
Last edited by SPADEZ on Wed Jul 07, 2010 6:11 pm; edited 1 time in total
