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DEPARTMENT OF MECHANICAL ENGINEERING

Submitted to

Mrs. Rati Saluja Submitted By

ANKIT MISHRA

0936040004

V th SEM, MEYEAR:2011


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Can you see in dark?

The answer is most definitely yes. with the proper

night -vision equipment,you can see a personstanding over 200 yards (183 m) away on amoonless, cloudy night.

Ability to see in dark night.


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The first night vision devices (NVD) werecreated during WWII.

Pre 1940s: Flares and spot lights were used foroperations at night.

Functioned by placing an infrared filter over a

searchlight.


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A tank from WorldWar II equipped

with a search light

used for nightcombat.


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Thermal imaging Image enhancement


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The screen waspurposefully coloredgreen due to the

scientific fact that thehuman eye candifferentiate more

shades of green thatany other color


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The starlight scopes of the1960s havethree image intensifier tubes connected in a

series. During this time period the first Generation

of NVD began using intensified naturallighting.

The power of Generation 1 NVD was put tothe test in the Vietnam War.


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The microchannel plate(MCP) electron

multiplierpromptedGeneration 2

development inthe 1970s.


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These thermal imagers were expensive, so in

1973 scientists created a common module

that made it less expensive, and more idealfor military use.

The generation 2 NVD were first put to thetest by US forces in the early1990s duringOperation Desert Storm in Kuwait.


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The currently generations of NVS are

generations 3 and 4.

Generation 3 is much like generation 2except for it has a substantially longer life, aswell as more defined images.

Generation 4 has less noise than generation3, however it has shorter life.


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Here is a chart comparing the life in hours of

the intensification tube for generations 1-3

Generation 1 Generation 2 Generation 3

2,000 hours 2,500- 4,000

hours

10,000 hours


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Development of NVD up until the 1980s wascompletely focused around military purposes.

In the 80s, companies in the US and Europetook NVT and found ways to improveeveryday civilian life.


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There are many practical everyday uses for NVD,some of which are:

Law Enforcement

Hunting

Wildlife observation


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Security

Navigation

Hidden-Object detection

Entertainment


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In conclusion I believe that is wonderful howsomething originally designed for

destruction, can now help people on anevery-day basis. This is truly amazing technology.


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