video cameras are used to augment other industrial technologies such as x-ray radiography. When used with the proper phosphor screen which converts x-rays into visible light, high-speed cameras can be used to capture high-speed x-ray videos of events inside mechanical devices and biological specimens. The imaging speed is mainly limited by the phosphor screen decay rate and intensity gain which has a direct relationship on the camera's exposure. Pulsed x-ray sources limit frame rate and should be properly synchronized with camera frame captures. Uses in warfare In 1950 Morton Sultanoff, an engineer for the U.S. Army at Aberdeen Proving ground, invented a super high-speed camera that took frames at one-millionth of a second, and was fast enough to record the shock wave of a small explosion. High Speed digital cameras have been used to study how mines dropped from the air will deploy in near-shore regions, including development of various weapon systems. In 2005 high speed digital cameras with 4 megapixel resolution, recording at 1500 fps, were replacing the 35mm and 70mm high speed film cameras used on tracking mounts on test ranges that capture ballistic intercepts. See also High framerate video Slow motion Photron (Photron's FASTCAM High-speed Cameras) Vision Research Phantom (Vision Research's Phantom High-Speed Cameras) Mikrotron (high-speed cameras) High-speed photography Rapatronic camera Burst mode (photography) Hubert Schardin References Film and video technology Cameras by type Articles containing video clips Slow motion