H04N 1/0316

Details of scanning heads {; Means for illuminating the original} for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors {using photodetectors and illumination means mounted on separate supports or substrates or mounted in different planes illuminating the scanned image elements through the plane of the photodetector, e.g. back-light illumination}