Abstract: Television camera for picking-up a scene and for producing a signal for an image therefrom, a portion of which has an increased resolution. At its input the camera is provided with a lens which produces an image of the scene on the input face of an anamorphic lens which distorts the image in accordance with a predetermined law in a given direction, the lens co-operating with a bidimensional charge-transfer pick-up device. This device detects the distorted image supplied, and includes an output shift register which is read by means of a clock whose rate is programmed as a function of the predetermined law so that the signal supplied by the charge-transfer device renders it possible to recover a final image which is no longer distorted, and which has a different resolution in different portions of the image. The image may be progressively or uniformly distorted into one direction in a certain portion of the image.

Abstract: The invention relates to an image detector for a camera operating in a "day" mode and a "night" mode. The detector comprises an evacuated envelope containing a semitransparent photocathode for the transmission of incident photons or for converting photons into photoelectrons, depending on whether the mode is "day" or "night", respectively. The detector also comprises a detector capable of converting the incident photons or the photoelectrons into an electrical image signal. The image detector further includes electronic means for focussing the photoelectrons onto the detector, and optical means for focussing the photons onto the photocathode or onto the detector. The photocathode comprises a thin layer having at least one active layer of a III-V n-type material. The detector consists of a two-dimensional charge transfer device. The electronic means for focussing the photoelectrons on the charge transfer device comprises proximity focussing means.