Color video camera with selectively expanded sensitivity

Details Color video camera with selectively expanded sensitivity Color video camera with selectively expanded sensitivity

1975-09-11

1977-04-05

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

178DIG8, 178DIG29, 358113, H04N 904, H04N 530

Patent

active

040165973

ABSTRACT:
Primary color filters which also pass infrared are employed in cooperation with a broad-spectral-response, image sensing apparatus to provide a color video camera which has an extended range of operation at low light levels. The image beam which reaches the image sensing apparatus is selectively controlled by a regulatable infrared filtering device in cooperation with such primary color filters. Upon detecting a normal light level, the infrared filtering device responds by blocking infrared. At low light levels, on the other hand, infrared blocking is negated and infrared passes through some or all of the primary color filters to augment the faint visible light components which are imaged on the image sensing apparatus.

REFERENCES:
patent: 3748383 (1973-07-01), Grossman

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