System and Method for Dynamically Recording Distortion in a Transparency.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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A method and system for dynamically recording distortion in a transparency for movement about a predetermined horizontal or vertical axis, with a camera disposed in back of the transparency while a test target is disposed in front of it. The test target has a plurality of small light sources arranged in a rectangular matrix pattern toward which the camera is aimed through the transparency. By opening the camera shutter for a period of time as the transparency is moved through a predetermined angle, a photographic record of distortion at a plurality of regions in the transparency is produced. Author