JABALPUR ENGINEERING COLLEGE

DEPARTMENT OF ELECTRICAL ENGINEERING

SEMINAR REPORT ON

NIGHT VISION

Submitted toMr. Hemant Amahiya

Sir, LecturerDEPTT. OF ELECTRICAL

ENGINEERINGJEC, JABALPUR

Submitted By

SUBHASH DHAKAR (0201EE071056)V th SEM, EE

YEAR:2009

Introduction

• “ Can you see in dark?”

• The answer is most definitely yes. with the proper night -vision equipment,you can see a person standing over 200 yards (183 m) away on a moonless, cloudy night.

• Ability to see in dark night.

Introduction Cont.

Introduction Cont.

The first night vision devices (NVD) were created during WWII.

• Pre 1940’s: Flares and spot lights were used for operations at night.

• Functioned by placing an infrared filter over a searchlight.

Introduction Cont.

A tank from World War II

equipped with a search light

used for night combat.

Working

• Thermal imaging• Image enhancement

Thermal imaging

Image enhancement

Why do NVD devices always show images in hues of green?

The screen was purposefully colored green due to the scientific fact that the human eye can differentiate more shades of green that any other color

Generation 1

• The starlight scopes of the 1960’s have three image intensifier tubes connected in a series.

During this time period the first “Generation” of NVD began using intensified natural lighting.

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

Generation 1 Cont.

Generation 2

The micro channel plate (MCP) electron multiplier prompted Generation 2 development in the 1970’s.

Generation 2 Cont.

These thermal imagers were expensive, so in 1973 scientists created a common module that made it less expensive, and more ideal for military use.

The generation 2 NVD were first put to the test by US forces in the early 1990’s during Operation Desert Storm in Kuwait.

Current Generations

The currently generations of NVS 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.

Current Generations Cont.

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

General Public Use

Development of NVD up until the 1980’s was completely focused around military purposes.

• In the 80’s, companies in the US and Europe took NVT and found ways to improve everyday civilian life.

General Public Use Cont.

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

Law Enforcement

Hunting

Wildlife observation

General Public Use Cont.

Security

Navigation

Hidden-Object detection

Entertainment

Conclusion

In conclusion I believe that is wonderful how something originally designed for destruction, can now help people on an every-day basis.

This is truly amazing technology.

THANK YOU