Abstract:
A night vision device (NVD) is an optical installment that allows
images to be produced in levels of light approaching total darkness.
They are most often used by the military and law enforcement agencies,
but are available to civilian users. The term usually refers to a
complete unit, including an image intensifier tube, a protective and
generally water-resistant housing, and some type of mounting system.
Many NVDs also include sacrificial lenses, IR illuminators, and
telescopic lenses. NVDs are mounted appropriately for their specific
purpose, with more general- purpose devices having more mounting
options. For instance, the AN/PVS-14 is a monocular night vision device
in use with the US military as well as by civilians. It may be mounted
on the user's head for hands free use with a harness or
helmet attachment, either as a monocular device, or in aligned pairs
for binocular "night vision goggles" which provide a degree of depth
perception as do optical binoculars. The AN/PVS-14 may also
be attached to a rifle using a Pica tinny rail, in front of an existing
telescopic or red dot sight, or attached to a single-lens reflex
camera. Other systems, such as the AN/PVS-22 or Universal Night Sight,
are designed for a specific purpose, integrating an image intensifier
into, for example, a telescopic sight, resulting in a smaller and
lighter but less versatile system.
Download
Labels:
Seminar Topics
Previous Article
Posts
Responses
0 Respones to "Night Vision Technology"
Post a Comment