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Colorization Of Schlieren Images

The authors have employed an electro-optical technique to introduce color into achromatic images resulting from any of the refractive recording methods. An achromatic television camera is used as the image detector. Its output is monitored by multiple signal level detectors which switch in preselected color inputs. The addition of achromatic camera signal, switched color signal, and color synchronization information provides a color kinescope image whose spatial characteristics have been determined by the camera input. This paper describes the operation of this system, our qualitative evaluations, and areas for further investigation.