19-07-2012, 01:11 PM
NIGHT VISION TECHNOLOGY
[attachment=28064]
INTRODUCTION
Night vision technology, literally allows one to see in the dark.
It is originally developed for military use .
Humans have poor night vision compared to many
other animals.
With the proper night-vision equipment, we can see a person standing over 200 yards (183 m) away on a moonless, cloudy night.
Image Intensification:
It works by collecting the tiny amounts of light, such as moonlight or starlight, that is present in the surrounding area.
It increases the intensity of the available light.
Thermal Imaging:
It uses the near and far infra-red
wavelengths being emitted by objects.
It amplifies the available light to a point that
we can easily observe the image.
Current generations
The current generations of NVD are generations 3 and 4.
Generation 3 is much like generation 2 except for it has a substantially longer life, as well as more defined images.
Generation 4 has less noise than generation 3, however it has shorter life.
[attachment=28064]
INTRODUCTION
Night vision technology, literally allows one to see in the dark.
It is originally developed for military use .
Humans have poor night vision compared to many
other animals.
With the proper night-vision equipment, we can see a person standing over 200 yards (183 m) away on a moonless, cloudy night.
Image Intensification:
It works by collecting the tiny amounts of light, such as moonlight or starlight, that is present in the surrounding area.
It increases the intensity of the available light.
Thermal Imaging:
It uses the near and far infra-red
wavelengths being emitted by objects.
It amplifies the available light to a point that
we can easily observe the image.
Current generations
The current generations of NVD are generations 3 and 4.
Generation 3 is much like generation 2 except for it has a substantially longer life, as well as more defined images.
Generation 4 has less noise than generation 3, however it has shorter life.