Stand-off chemical detector

A chemical detection method, comprising:

• selectively receiving first non-visible radiation having a first range of wavelengths at a plurality of first charge-coupled-device radiation sensing elements of an array of charge-coupled-device radiation sensing elements of a stand-off sensor;
• selectively receiving second non-visible radiation having a second range of wavelengths different than the first range of wavelengths at a plurality of second charge-coupled-device radiation sensing elements of the array of charge-coupled-device radiation sensing elements;
• outputting a first electrical signal from each of the first charge-coupled-device radiation sensing elements in response to receiving the first range of non-visible radiation thereat;
• outputting a second electrical signal from each of the second charge-coupled-device radiation sensing elements in response to receiving the second range of non-visible radiation thereat;
• and
• demosaicing the first and second electrical signals so that data of first pixels of an image field of the detector respectively corresponding to the first charge-coupled-device electromagnetic radiation sensing elements and data of second pixels of the image field of the detector respectively corresponding to the second charge-coupled-device electromagnetic radiation sensing elements contain contributions from the first and second electrical signals and thus from the first range and second range of non-visible radiation.

A stand-off chemical detector, comprising:

• an array comprising at least a plurality of first charge-coupled-device radiation sensing elements and a plurality of second charge-coupled-device radiation sensing elements, wherein the first charge-coupled-device radiation sensing elements respectively correspond to first pixels of an image field of the detector and the second charge-coupled-device radiation sensing elements respectively correspond to second pixels of the image field;
• a plurality of first filters, each of the first filters configured to pass first non-visible radiation having a first range of wavelengths to a respective one of the first charge-coupled-device radiation sensing elements;
• a plurality of second filters, each of the second filters configured to pass second non-visible radiation having a second range of wavelengths different from the first range of wavelengths to a respective one of the second charge-coupled-device radiation sensing elements;
• a processor electrically coupled to the array;
• wherein the processor is configured to demosaic outputs of the first charge-coupled-device electromagnetic radiation sensing elements corresponding to the first range of non-visible radiation and the second charge-coupled-device electromagnetic radiation sensing elements corresponding to the second range of non-visible radiation so that first pixel data of the first pixels and second pixel data of the second pixels contain contributions from the first range of non-visible radiation and the second range of non-visible radiation.