Abstract:
Light from a scene is directed through the faceplate of an image pickup having an electron gun operative to produce an electron beam. The light impinges upon a layered target structure including a photoconductor and a conductive signal electrode. The target structure comprising a plurality of parallel elongated areas of varying conductivity such that the scanning of an electron beam across the target structure produces a composite video signal containing information representative of the image formed on the target and periodic current impulses whose frequency is above the predetermined range of frequencies of the video signal information and is representative of the parallel elongated areas of varying conductivity. Means are provided for separating the video signal information from the index signal. Other embodiments of the invention include the use of filters with the invention for producing electrical signals representative of a scene and use of the index signal to demodulate the color representative signals.
Abstract:
Colored light from a scene is spatially encoded onto a photosensitive surface by a striped spatial color encoding filter assembly including first and second superimposed encoding gratings having equal pitch encoding stripes disposed such that the stripes of the respective gratings are at substantially equal and opposite angles measured from a reference line in the plane of the filter. Scanning of the encoded image on the photosensitive surface produces a composite signal including first and second carrier wave components representative of first and second colors and having substantially the same frequency during a scanning interval. The carrier wave components are separated by comb filter apparatus for producing separate color representative signals.