Broadband camera for flame detection and detection of a thermal image of the scene of the flame

An infrared imaging system, comprising:

• a detector configured to detect a flame in a first infrared wavelength band and to detect a thermal image in a second infrared wavelength band, longer than the first infrared wavelength band, wherein the detector is further configured to detect a third infrared wavelength band in a mid-range wavelength band in which a flame is less intense than in the first infrared wavelength band;
• a pattern of first filter components to transmit the first infrared wavelength band, second filter components to transmit the second infrared wavelength band, and third filter components to transmit the third infrared wavelength band, wherein a number of third filter components is less than a number of first filter components or a number of second filter components,
• an imaging circuit configured to output an image including the flame and the thermal image;
• and
• a confirmation circuit configured to determine that detection of a flame is a false positive in response to an intensity of the light at the third infrared wavelength band being greater than a threshold.