Main Night Vision Technology Ppt

8/19/2019 Main Night Vision Technology Ppt

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Seminar

On

Night Vision Technology

by M.Vishnu vardhan 13675A040


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Introduction

Types of Night Vision

Working of Technical Night Vision

Night Vision DevicesApplications

Conclusion

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Night vision technology, literally allows one to see in the dark.

u!ans have poor night vision co!pared to !any other

ani!als.

With the proper night"vision e#uip!ent, we can see a person

standing over $%% yards &'() !* away on a !oonless, cloudy

night.

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It is +roadly classified into two types

I!age intensifier

Ther!al i!aging

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%age intensi/ier rocess


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%age %ntensi/ier The lenses at the end of a night vision scope

or pair of goggles gather availa+le light,

including so!e fro! the lower spectru!of invisi+le infrared.

The gathered light is sent to the i!age"intensifier

tu+e which transfor!s the photons, or light

particles, into electrons.

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The light energy released electron fro! thecathode and accelerated.

These electrons flow through a !icrochannel plate, which is a disc with !illions of

tiny holes, or !icro channels, in it.

!ontd


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As the electrons strike electrodes on the !icro

channels.

enrates voltage cause the !otion of electrons toincrease rapidly, for!ing a dense clouds of electrons

that intensifies the original i!age.

At the far end of the tu+e, the electrons hit a screen

coated with a phosphor.

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The energy fro! the electrons e-cites the phosphor which converts the electrons +ack into

photons.

This for! the greenish i!age on the screen insidethe viewing lens of the device.

Contd…


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Theral iaging rocess


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All o+ects e!it infrared energy as a function of their

te!perature.

A lens focuses the infrared light.

The focused light is scanned and create te!perature

pattern.

The pattern created is translated into electric

i!pulses.

Theral iaging


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The i!pulses are sent to a circuit +oard that translates

the infor!ation into data for the display.

The signal"processing unit sends the infor!ation tothe display, and appears as various colors.

Ther!al i!ages are +lack and white in nature.

!ontd


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Night vision devices are +asically divided into three categories

/C012/ They are !onocular nor!ally

handheld or !ounted on a weapon.

032/ They are +inocular and

worn on the head.

CA425A/ 6sed for trans!ission or recording

of i!ages !ostly if the location is fi-ed.

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7ig)8" Night vision devices


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4ilitary

Navigation

Wildlife o+servation

/ecurity

idden"o+ect detection

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No particular skill re#uired

Accidents cases reduction

Co!pact syste!

)- range visual

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The only disadvantage is that the Initial cost too high.

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Today in the $'st century we have co!e a long way in thedevelop!ent of night vision technology, fro! the early'9:%;s.

Night vision devices are +asically designed for ut!ostdefensive purposes.

In present scenario the applications of night visiontechnology is very essential to co!+at terroris! which is a!aor pro+le! +eing faced +y !ankind.

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T-AN2 )"(

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Main Night Vision Technology Ppt