Video picture generator photodetector
AssigneeThomson-CSF
InventorsBernard Grancoin, Christian Pepin
Life of this patent
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Abstract
Camera having means for the automatic regulation of the sensitivity of a charge transfer detector functioning by vertical frame transfer. These means comprise a loop for controlling the video signal by varying the integration time of electrons in the image area of the CTD sensor, as well as an optical attenuating device for chopping said area during each period of transferring the collected charges into the store. The attenuator has at least one fixed disk and one movable disk controlled in rotation, the disks carrying optical densities or being made of polarizers.
Claims11
A video picture generator photodetector using a solid state camera with charge transfer operating by vertical frame transfer and comprising:
- an optical system for focusing the radiation onto the image area of a charge transfer array detector;
- a generator for the synchronization signals of the detector;
- and means for regulating the detector sensitivity grouping means for the control of the video signal by varying the integration time during which the electrons are collected in the picture area and optical attenuation means using density-carrying disks for chopping the picture area during each frame period substantially during the time interval when the collected charges are transferred to the store area of the detector.
Dependencies are inferred from the claim text.