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The AN/PSQ-20 Enhanced Night Vision Goggle (ENVG) is a third-generation passive monocular night vision device developed for the United States Armed Forces by ITT Exelis. It fuses image-intensifying and thermal-imaging technologies, enabling vision in conditions with very little light. The two methods can be used simultaneously or individually.
The AN/PSQ-42 Enhanced Night Vision Goggle-Binocular (ENVG-B) is a third-generation passive binocular night vision device developed for the United States Army by L3Harris.It combines dual tube image-intensifying (I²) and thermal-imaging technologies into a single goggle, enabling vision in low-light conditions.
A comparison of I² only night vision (above) and I² plus thermal fusion (below) Fusion night vision combines I² (image intensification) with thermal imaging, which functions in the medium (MWIR 3-5 μm) and/or long (LWIR 8-14 μm) wavelength range. [42] Initial models appeared in the 2000s. [32] Dedicated fusion devices and clip-on imagers ...
The sight is designed for use on small arms in the U.S. military's inventory, but it can also be used as a standalone observation device. The AN/PAS-13B uses thermal imaging so that it can be used day or night. Thermal imaging also allows the sight to see through smoke or fog, things that may normally obscure other night vision devices.
Infrared vision is the capability of biological or artificial systems to detect infrared radiation.The terms thermal vision and thermal imaging [1] [2] are also commonly used in this context since infrared emissions from a body are directly related to their temperature: hotter objects emit more energy in the infrared spectrum than colder ones.
1974 US Army film about the development of military night vision technology. Night vision technologies can be broadly divided into three main categories: image intensification, active illumination, and thermal imaging. Digital night vision is also emerging, which instead uses high sensitivity CMOS image sensors with a passthrough system.
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