Color video camera with selectively expanded sensitivity

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

H - Electricity

04

N

350/43

H04N 9/04 (2006.01) H04N 5/225 (2006.01) H04N 5/238 (2006.01) H04N 5/30 (2006.01) H04N 5/33 (2006.01)

Patent

CA 1101985

COLOR VIDEO CAMERA WITH SELECTIVELY EXPANDED SENSITIVITY ABSTRACT OF THE DISCLOSURE Primary color filters which also pass infrared are employed in cooperation with a broad spectral response, image sensing apparatus in providing 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 visi- ble light components which are imaged on the image sensing apparatus. - 1 -

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