Apparatus and method for inhibiting blooming in television camer

Details Apparatus and method for inhibiting blooming in television camer Apparatus and method for inhibiting blooming in television camer

1989-06-28

1991-01-15

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821319, H04N 314

Patent

active

049857738

ABSTRACT:
Blooming inhibition in an intensified television camera having an image intensifier is effected by applying periodic electrical pulses to the photocathode of the image intensifier of an amplitude that absorbs into the photocathode of the image intensifier excessive electrons in the photocathode and in a space charge adjacent the photocathode resulting from a bright light point in the scene. The pulses are of such short duration that sensitivity of the camera is not significantly reduced. The periodicity of the pulses is such that a plurality of the pulses are applied during each raster line scan. Alternatively, one pulse may be applied during each raster line retrace.

REFERENCES:
patent: 4462047 (1984-07-01), Fujimoto et al.
patent: 4500924 (1985-02-01), Ohta
patent: 4626915 (1986-12-01), Takatsu
patent: 4875101 (1989-10-01), Endo et al.

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