COLOR INFRARED DETECTING SET

A color infrared detecting set is provided which utilizes the variation of emissivity of objects to add the effect of color to the sensing and presentation format. With color added to brightness a large number of shade combinations are possible and a large visible distinction between objects is realized. Color image signals are obtained by infrared energy passing through filters of different wavelengths (for a range of detection interest) to corresponding detectors which convert the infrared energy to electrical signals. The electrical signals are amplified, weighted and summed in one channel to produce a brightness signal, and processed in another channel to produce a plurality of color-difference signals. The brightness signal drives a plurality of light modulators, and each light modulator receives a color perturbation signal derived from the color-difference signals to obtain a color signal representative of one of the tristimulus values. The color signals are combined to produce an image of brightness equal to a black and white image, but having an apparent hue.