Red/near-infrared filtering for CCD cameras

Television – Camera – system and detail – With single image scanning device supplying plural color...

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348273, 348280, H04N 907

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active

055554644

ABSTRACT:
A CCD camera is adapted for detecting red and near-infrared wavelengths by employing filters that are constructed to allow for the passage of only red light in certain areas and near-infrared light in other areas of the filter. The areas are designed to match the pixel geometry of the lens of a primary color CCD camera that has a predefined pattern of red, blue and green pixels. The match is such that the red bandpass filter areas overlay the red pixels, and the near-infrared bandpass filter areas match the blue and green pixel areas. The red, green and blue output lines of the CCD camera are supplied to a signal processor which uses the signals on these lines to provide combinations of red and near-infrared magnitude that are capable of detecting vegetation from a background. The camera is suitable for full color use again merely by removing the filter that provides R and NIR sensing without otherwise disabling or modifying the camera.

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Sony brochure for lCCD R.G.B. Primary Color Filter Camera Module XC-711/711P.

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