Working principle of night vision device

A special lens focuses the infrared rays emitted by objects within the field of view. A phased array on the infrared detector element scans the focused light. The detector elements produce very detailed temperature patterns called temperature spectra. It only takes about 1/30 of a second for the detector array to obtain temperature information and create a temperature spectrum. This information is obtained from thousands of detection points in the field of view of the detector array.
The temperature spectrum generated by the detector element is converted into electrical pulses. These pulses are transmitted to the signal processing unit - a circuit board integrated with precision chips that convert the information from the detector elements into data that can be read by the display. The signal processing unit sends information to the display to display various colors on the display, with the intensity of the color determined by the intensity of the infrared emission. By combining the pulses from the detector elements, an image is produced.