Night Vision Devices
A night vision device (NVD) is a device comprising an image intensifier tube in a rigid casing, commonly used by military forces. Lately, night vision technology has become more widely available for civilian use. For example, enhanced vision systems (EVS) have become available for aircraft to help pilots with situational awareness and avoid accidents. These systems are included in the latest avionics packages from manufacturers such as Cirrus and Cessna.
A specific type of NVD, the night vision goggle (NVG) is a night vision device with dual eyepieces. The device can utilize either one intensifier tube with the same image sent to both eyes, or a separate image intensifier tube for each eye. Night vision goggle combined with magnification lenses constitutes night vision binoculars. Other types include monocular night vision devices with only one eyepiece which may be mounted to firearms as night sights. NVG and EVS technologies are becoming more popular products for helicopter operations to improve safety. The NTSB is considering EVS as recommended equipment for safety features.
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Famous quotes containing the words night, vision and/or devices:
“There are some achievements which are never done in the presence of those who hear of them. Catching salmon is one, and working all night is another.”
—Anthony Trollope (1815–1882)
“The liveliness of literature lies in its exceptionality, in being the individual, idiosyncratic vision of one human being, in which, to our delight and great surprise, we may find our own vision reflected.”
—Salman Rushdie (b. 1947)
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Which now I unlearn, and become, as it were, a little child again that I may enter into the Kingdom of God.”
—Thomas Traherne (1636–1674)