ABSTRACT
Time-gated imaging provides a view of the world well beyond the one available to the unaided eye. Details of the motion of creatures or objects and scientific studies of explosions, shock fronts and other interactions are among the things that become visible with imaging systems with sufficiently short time resolutions. In Harold E. Edgerton approach the film was exposed continuously in a dark room and the duration of exposure was controlled by the duration of the light flash. His technology concentrated on the development of pulsed electronic flash units based on xenon flash lamps. Streak cameras use a small slit at the entrance to the camera and sweep the image of the slit across the phosphor with a deflecting voltage. The progression of high-speed imaging to ever shorter times has gone from shuttered systems to pulsed illumination to shutters again as each technology has reached a practical limit.
