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INDEX

INTRODUCTION

GOVERNING PRINCIPLE

TYPES

-Image intensification tech-Thermal imaging tech

N.V.T Characteristics

ADVANTAGES

LIMITATIONS

APPLICATIONS

FUTURE PROSPECTS

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WHAT IS NVT?

N.V.T encompass techniques of image conversion,

image intensification and thermal imaging

.

Night vision equipment has evolved from bulky

optical instruments in lightweight goggles.

Was first used in second world war.

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GOVERNING PRINCIPLE

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GOVERNING PRINCIPLE

Incoming light is

collimated by fiber

optic plates

Impacting aphotocathode which

releases electrons, ,

which in turn impact a

phosphor screen.

Green illumination is

liberated creating an

image.

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TYPES OF NVT

Image Intensification -works by collecting the tiny amounts of light.

- including the lower portion of the infrared light

spectrum.

Thermal imaging - operates by capturing the upper portion of the

infrared light spectrum emitted by hot objects.-Hotter objects, such as warm bodies, emit moreof this light than cooler objects.

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Image intensification technology

Takes the small amount of light that's in thesurrounding area (such as moonlight or starlight).

Converts the light energy (photons) into electricalenergy (electrons).

Electrons pass through a thin disk containingmore than 10 million channels.

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Image Intensification Technology

As the electrons go through the channels,

secondary emission of electrons takes place.

Electrons collides with phosphor screen

creating clear image even in night.

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Thermal Imaging Technology

Thermal imaging works as:

-A special lens focuses the infrared light emitted

by all of the objects in view.

-The focused light is scanned by a phased arrayforming thermogram pattern.

-The thermo gram created by the detectorelements is translated into electric impulses.

-The impulses are sent to a signal-processing unit.

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Some Characteristics OfN.V.T

Depth Perception

Degraded performance in Fog

and Rain

Honeycomb

dark and bright Spots

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ADVANTAGES

The ability to see in total darkness.

Possessing better vision than the enemy, thus

putting him at a disadvantage.

Increased mobility as a result of improved vision.

Quite useful in security and rescue operations.

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LIMITATIONS

Lack of clarity.

Limited field of vision.

Necessity of an additional power source.

Most night vision devices do not detect color

information

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APPLICATIONS

Military purposes

Law enforcement

Wildlife observation and hunting

Navigation

Investigation and security

Surveillance and hidden object detection

Search and rescue operations

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FUTURE PROSPECT

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CONCLUSION

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Thank you for your attention!

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