Television camera equipped with an anti-blooming device

A television camera equipped with an anti-blooming device intended more particularly for homing apparatus, comprising;

• a camera tube for supplying a video signal and having an electrode;
• scanning circuits for providing horizontal and vertical deflection signals of a raster scan for said tube;
• a first signal generator for producing electron-beam blanking signals during the line and frame flyback periods;
• a second signal generator for producing line and frame synchronizing signals;
• an anti-blooming device comprising:
• threshold comparator means for comparing said video signal to a threshold substantially equal to the camera tube saturation level to detect video signal amplitudes corresponding to a bright spot,
• first means connected to the output of said comparator means for generating deflection signals which correspond to the horizontal and vertical coordinates of said bright spot, and
• second means connected to the output of said comparator means for generating a signal unblanking the camera tube during a portion of the flyback period to provide a determined electron-beam intensity, said signal being provided at a repetition rate at least equal to a line period and the number of repeated occurrences thereof being determined by the brightness of the bright spot;
• first mixing means for providing the raster scan deflector signals and, during flyback periods, said bright spot deflection signals;
• and
• second mixing means for providing to the electrode of said camera tube, electron-beam intensity modulating signals comprising said unblanking signals during flyback periods for producing a local modification of the tube sensitivity.