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Night-vision devices were introduced in the German Army as early as 1939 [citation needed] and were used in World War II. AEG started developing its first devices in 1935. In mid-1943, the German Army began testing infrared night-vision devices and telescopic rangefinders mounted on Panther tanks. Two arrangements were constructed.
Active infrared night-vision combines infrared illumination of spectral range 700–1,000 nm (just over the visible spectrum of the human eye) with CCD cameras sensitive to this light. The resulting scene, which is apparently dark to a human observer, appears as a monochrome image on a normal display device. [15]
The FG 1250 or Fahr- und Zielgerät FG 1250 (driving and aiming device FG 1250) was a German active infrared night-vision device mounted on tanks and other armored vehicles. It was developed by Ing Gaertner of the German optics company Carl Zeiss AG beginning in 1941. [1] According to other sources, it was developed by AEG and produced by Ernst ...
They can be used to help pilots and drivers steer their vehicles at night and in fog, or to detect warm objects against a cooler background. The wavelength of infrared that thermal imaging cameras detect is 3 to 12 μm and differs significantly from that of night vision, which operates in the visible light and near-infrared ranges (0.4 to 1.0 μm).
Infrared lamps are also used for some night vision devices where visible light would be objectionable. Infrared lamp sources are used in certain scientific and industrial instrument for chemical analysis of liquids and gases; for example, the pollutant sulfur dioxide in air can be measured using its infrared absorption characteristics.
Infrared vision or thermal vision may refer to: Thermography, the measurement of infrared radiation by thermal camera or similar instrument; Night vision, the improved ability to see in low-light conditions using night-vision devices; Thermoception, the detection of infrared radiation by an organism