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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.
Digital night vision relies on high sensitivity back-illuminated CMOS image sensors, also sometimes called sCMOS (scientific CMOS). Their sensitivity can exceed the sensitivity of the human eye. [13] These sensors can be head-mounted in night vision goggles and rifle scopes, but are also used in security camera systems, astronomy, and ...
A US airman tests AN/AVS-10 panoramic night-vision goggles in March 2006. Member of the U.S. Marine Corps testing out the GPNVG-18. Night vision devices typically have a limited field of view (FoV); the commonly used AN/PVS-14 has a FoV of 40, [66] less than the 95° monocular horizontal FoV and humans' 190° binocular horizontal FoV. [67]
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Many animals such as cats possess high-resolution night vision, allowing them to discriminate objects with high frequencies in low illumination settings. The tapetum lucidum is a reflective structure that is responsible for this superior night vision as it mirrors light back through the retina exposing the photoreceptor cells to an increased ...
Animal multilayer reflectors work in the same way as a man-made dielectric mirror (or Bragg mirror) being composed of alternating layers of high and low refractive index, the thickness of each layer being 1/4 the wavelength most strongly reflected. [8] To reflect a wide range of wavelengths, the spacing must vary through the thickness of the ...
Some sights are specifically designed to be visible when viewed through night vision devices. The color of a sight reticle is often red or amber for visibility against most backgrounds. Some sights use a chevron or triangular pattern instead, to aid precision aiming and range estimation, and still others provide selectable patterns.
The ZG 1229 Vampir was a Generation 0 active infrared night vision device developed for the Wehrmacht for the StG 44 assault rifle, intended primarily for night use. The issuing of the ZG 1229 Vampir system to the military started in 1944 and it was used on a small scale in combat from February 1945 until the final stages of World War II.