Wave forms, video images

We meet this case in technics. For instance, in an optical microscope, lenses fulfil the direct and inverse Fourier transforms the light is focused by a condenser onto the object, then diffracted, then collected by an objective, and finally the image is taken by a video camera and seen on a screen. The form of the object is seen as an intensity pattern that is a flat distribution of the optical density, because the phases of the waves forming the image are lost. A holographic technique, which always uses an interference of scattered rays with a reference beam having a known phase, allows the restoration of a volume image of the object. 

An analogous behavior was found on ring electrodes. 181 Far from the Flade potential, the complete ring was activated between two images of the video, and the subsequent repassivation wave formed at the outer and inner border of the ring in this way the outer wave appeared slightly before... 

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