Target for picture tube, tube provided with such a target and picture apparatus incorporating such a tube
AssigneeThomson-CSF
InventorsPierre Felix, Lucien Guyot
Life of this patent
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Abstract
The invention relates to a shooting target. The signal plate covering one of the faces of the actual target is subdivided into a plurality of electrically independent elementary signal plates in order to reduce the stray capacitance during the sampling of the signal on said plate. According to a preferred arrangement, these elementary plates are oriented in the same way as the scanning lines by the reading electron beam. This reading is performed either by a single beam or by a certain number of independent beams each covering a portion of the target. The applications are the same as in the prior art and in particular to infrared photography.
Claims7
A target for picture tube, comprising a flat substrate and a signal plate which conducts electricity, applied to one of the faces of the substrate, whose other face is scanned in operation in point by point manner along successive parallel lines by an electron beam, which supplies the quantity of charges necessary for compensating the effect produced by incident radiation on the substrate, whereby this quantity of charges read in the circuit of the signal plate constitutes the signal corresponding to the scanned point, wherein the signal plate is subdivided into a plurality of electrically independent elementary signal plates, arranged parallel to the scanning direction, each elementary signal plate being separately connected to a preamplifier, the respective preamplifiers being sequentially connected to the output amplifier.
Dependencies are inferred from the claim text.