Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)
Tags: NIGHT, VISION, TECHNOLOGY, SEMINAR, REPORT, night vision technology ppt, night vision technology seminar report, night vision technology pdfnight vision technology abstract, night vision technology powerpoint presentation, night vision technology wikipedia, night vision technology works, night vision technology seminar pptnight vision technology seminar topic, night vision technology ppt download, night vision tenders, night vision binoculars, night vision goggles, night vision devices, night vision camera, night vision binoculars india, night vision system,
Ask More Info Of  A Seminar Ask More Info Of A Project Post Reply  Follow us on Twitter
14-06-2009, 09:40 AM
Post: #1
NIGHT VISION TECHNOLOGY A SEMINAR REPORT

.docx  NIGHT VISION TECHNOLOGY1.docx (Size: 32.23 KB / Downloads: 1834) This article is presented by:
Randhir Kumar parmar

NIGHT VISION TECHNOLOGY

ABSTRACT


A night vision device (NVD) is an optical installment that allows images to be produced in levels of light approaching total darkness. They are most often used by the military and law enforcement agencies, but are available to civilian users. The term usually refers to a complete unit, including an image intensifier tube, a protective and generally water-resistant housing, and some type of mounting system. Many NVDs also include sacrificial lenses, IR illuminators, and telescopic lenses. NVDs are mounted appropriately for their specific purpose, with more general- purpose devices having more mounting options. For instance, the AN/PVS-14 is a monocular night vision device in use with the US military as well as by civilians. It may be mounted on the user's head for hands free use with a harness or helmet attachment, either as a monocular device, or in aligned pairs for binocular "night vision goggles" which provide a degree of depth perception as do optical binoculars. The AN/PVS-14 may also be attached to a rifle using a Pica tinny rail, in front of an existing telescopic or red dot sight, or attached to a single-lens reflex camera. Other systems, such as the AN/PVS-22 or Universal Night Sight, are designed for a specific purpose, integrating an image intensifier into, for example, a telescopic sight, resulting in a smaller and lighter but less versatile system.

Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
23-01-2010, 02:04 AM
Post: #2
RE: NIGHT VISION TECHNOLOGY A SEMINAR REPORT

.pdf  NIGHT VISION TECHNOLOGY.pdf (Size: 425.92 KB / Downloads: 4402)

.ppt  NIGHT_ VISION_TECH_PPT_DEEPIKA.ppt (Size: 1.19 MB / Downloads: 3510)
read http://www.seminarprojects.com/Thread-Night-Vision
for more about NIGHT VISION TECHNOLOGY


NIGHT VISION TECHNOLOGY

Presented BY
DEEPIKA.G.D
NIGHT VISION TECHNOLOGY

Introduction
Types of NVT
Thermal Imaging
Image Enhancement
Performance Attributes
Technical characteristics
Equipments
Applications
Conclusion
References


Introduction
NVT allows us to see in the dark
Originally developed for military use
Now used for site security, surveillance as well as search and rescue
Evolved from bulky optical instruments in lightweight goggles through the advancement of image intensification technology.
Types of night vision
Categorized by generations
Each substantial change NVT establishes a new generation
Categorized into:
Generation-0
Generation-1
Generation-2
Generation-3
Generation-4

Generation-0
Created by US Army
Uses active infrared
A projection unit called IR illuminator is attached
Full moon operation
Use anode in conjunction with cathode to accelerate the electrons
Problems “acceleration causes distortion of image as well as reduction of life of the tube
Also, it was quickly duplicated by the hostile nations

Generation-1 (1960â„¢s)
Uses passive infrared
Uses ambient light provided by the moon and the stars
Donâ„¢t require a source of projected infrared light
Donâ„¢t work well on cloudy or moonless nights
One quarter moon operation
Uses same image-intensifier tube technology as Generation-0
Same problems as faced by the Generation-0


Generation-2 (1970â„¢s)
Offer improved resolution and performance over Generation-1 devices
Considerably more reliable
Able to see in extreme low light conditions due to the addition of microchannel plate(MCP) to the image-intensifier tube
The images are less distorted and brighter



Generation-3 (1990â„¢s)
Currently used by the US Army
Better resolution and sensitivity
Photocathode is made up of Gallium Arsenide
MCP is coated with an ion barrier
Tube life is increased
Generation-4 (2000â„¢s)
Known as filmless and gated technology
Shows significant improvement in both high- and low-level light environments
No ion barrier in MCP
Responds quickly to different lightning conditions
Reduced background noise
Enhances signal to noise ratio
Images are less distorted and brighter

Thermal imaging
This technology operates by capturing upper portion of the infrared light spectrum, which is emitted as heat
Hotter objects emit more of this light than the cooler objects
These elements then create a thermogram
Thermogram electric pulses display data

Thermal imaging
Thermal imaging devices
Two types:
1. Uncooled.
2. Cryogenically cooled.

Great for detecting people or working in near-absolute darkness


Image Enhancement
Image Enhancement
It is also known as Image intensification
Relies on image intensifier tube to collect an amplify infrared and visible light
Lens captures the light which is then sent to image intensifier tube
It has photocathode that converts photons into electrons
When electrons pass through MCP ,more electrons are presented
This causes chain reaction where atoms are released
Electrons reach phosphor screen and photons are released
Those phosphor create green image


Performance Attributes
Sensitivity (photo response)- tubeâ„¢s ability to detect the available light
Signal- plays a key role in night visionâ„¢s performance
Resolution- ability to dissolve detail in the image
Technical Characteristics
Textures, Light and Dark
Depth Perception
Fog and Rain
Honeycomb
Spots
Equipments
Three categories
Scopes
Goggles
Cameras


Equipments
Scopes- monocular, handheld, better look at a specific object and then return to normal viewing conditions.
Goggles- binocular, handheld or worn, excellent for constant viewing
Cameras- send the image to a monitor for display or to a VCR for recording.




Applications
Military
Law enforcement
Hunting
Wild life observation
Surveillance
Security
Navigation
Hidden-object detection
Entertainment

Conclusions
Although the term ``night vision'' currently encompasses three distinct technologies, it is the evolution of image intensification technology that first made devices practical and widely used.

Their success was the result of advancements in light amplification and resolution techniques.
References

http://electronics.howstuffworks.com/nightvision3.html
http://www.nightvision.com/military/militaryhome.html
http://www.physics.ohio-state.edu/~wilki...index.html
http://www.atncorp.com/HowNightVisionWorks
http://www.morovision.com/hownightvisionworks.htm
http://www.alanaecology.com/acatalog/Introduction_to_ Nightvision.html

Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
30-01-2010, 10:36 PM
Post: #3
RE: NIGHT VISION TECHNOLOGY A SEMINAR REPORT
hii... please send me the night vision technology as soon as possible please....

Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
02-02-2010, 12:20 PM
Post: #4
RE: NIGHT VISION TECHNOLOGY A SEMINAR REPORT

.ppt  NIGHT VISION.ppt (Size: 846.5 KB / Downloads: 1513)
download this files for getting seminar report and presentation of NIGHT VISION TECHNOLOGY

.pdf  night-vision-technology-full report.pdf (Size: 200.63 KB / Downloads: 1650)

.doc  How NIGHTVISION Technology Works.doc (Size: 299.5 KB / Downloads: 1247)

.pptx  Night Vision Techonology.pptx (Size: 3.23 MB / Downloads: 1491)

NIGHT VISION TECHHNOLOGY
INTRODUCTION
Night vision Technology by literally allows one to see in the dark.
Night Vision Technology
Night Vision Technology is used to view objects in darkness.
This technique is mostly used by night vision devices.
NVD basically works on IR spectrum.
The light with shorter wavelength have higher energy.

NEAR INFRARED
MID INFRARAED
THERMAL INFRARAED

IR emission occurs when some changes occurs in the atomic level of objects.

If energy is applied to an atom the electron in it jumps to higher energy level.

As the electron trends to return to its ground state, it release its energy as photons.

This photon has specific wavelength depends on its energy level.



Night vision can work in two ways.



Thermal Imaging
Image Enhancement




Thermal Imaging

The thermal imaging technology operates by capturing the upper portion of IR light spectrum. The infrared spectrum is emitted as heat by objects instead of simply reflected as light. The warm objects emit more IR light than cooler objects.
WORKING

A special lens focuses the IR light emitted by all of the objects in view.
The focused light is scanned by a phased array of IR detected elements.
This scanning create a very detailed temperature pattern called thermogram.
The thermogram created by the detector elements is translated into electric impulses.


The electric impulses are then send to a signal processing unit which translates them into data for the display.
The signal processing unit send the information to the display. Itâ„¢s colour depends on the intensity of IR emission.
The combination of all the impulses from all the elements create the image.



IMAGE ENHANCEMENT

Image enhancement systems are normally called NVDâ„¢s. NVDâ„¢s rely on a special tube called an image intensifier tube to collect and amplify IR and visible light.
Working


An objective lens captures near-IR light.
The gathered light is send to the image-intensifier tube. The power supply for this tube receives power from two N-cell or AA battery.
The image intensifier tube has a photo cathode, which is used to convert the photons into electrons.
When the electron pass through the tube, similar electrons are released from atoms and it multiplies in number through micro channel plate(MCP).

An MCP is a glass disc that has various microscopic holes and has metal electrodes on both sides.

When a electron from the photo cathode hit the first electrode of MCP they get accelerated.

As electron pass through the micro channels they release other electrons using a process called Cascaded secondary emission.

The new electron collide with atoms creating a chain reaction result in rapid increase of electron.


The micro channels are created at a slight angle to encourage electron collision.

At last the electron hit a screen coated with phosphorus. This cause phosphorus to reach exited state and release photons.

This photons create green image which characterize night vision.

The viewed image can be magnified and focused through occular lens.





CHARACTERISTICS

Textures, light and dark
The objects that are clearly visible on day appear dark and vice versa through night vision unit.

Fog and Rain
Fog and rain reflect more light towards the night vision unit and this may degrade its performance.



Honey comb


This is a faint hexagonal pattern witch is the result of the manufacturing process.
Black spots
A few is a inherent characteristics of night vision technology which remain constant and will not increase in size or number.

EQUIPMENTS

Night vision Equipments can be classified into three categories.
Scope

Goggle

Cameras
Scopes

Scopes are monocular can be handheld or mounted on a weapon.
Goggles
Goggles are binocular can be handheld or worn on the head.
Cameras
Cameras with night vision technology can send the images to a monitor or VCR for display or recording.
APPLICATIONS

Military
Law Enforcement
Hunting
Wild life observation
Surveillance
Security
Navigation
Hidden object detection
Entertainment

ADVANTAGES

Night vision devices are compact in size and is easily portable.

It is widely used in military purposes so it is reliable.

Itâ„¢s working is very simple so it is easy to use.

It is designed for a long life.
DISADVANTAGES

Night vision devices is very costly.

It cannot properly be used in rain and fog as it degrade its performance.

Poor quality images due to black spots.
CONCLUSION

The new generation began to discover the unique world that can be found after darkness falls. Thus in the modern times night vision technology become a part of our daily life. Night vision devices can be useful to you “ just be sure to get the right type of your needs.

Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
12-02-2010, 11:21 AM
Post: #5
RE: NIGHT VISION TECHNOLOGY A SEMINAR REPORT

.doc  NIGHT VISION TECHNOLOGY.doc (Size: 71 KB / Downloads: 661)
Night vision

ABSTRACT
"Night vision" as referenced here is that technology that provides us with the miracle of vision in total darkness and the improvement of vision in low light environment. Night vision has existed for more than fifty years. Its importance is remarkable mostly in warfare, though night vision has numerous uses. Modern hunters rely in night vision to hunt animals during the night without being exposed to them
Night vision has had many improvements throughout the course of history. Its beginning date back to Second World War when the Germans idealized a very effective way to easily use their sniper rifles during the night. This was later researched very deeply into because night vision proved to have a devastating advantage for those who used it.
There are currently two different technologies for night vision .The first one is thermal vision and second one is regular vision. Both of them are used for detect object, though they both have advantage and disadvantages for thermal vision is that it does not require any light whatsoever to function. On the other hands regular vision cannot function in complete darkness because they Use technology capable of multiplying exis


INTRODUCTION


"Night vision" as referenced here is that technology that provides us with the miracle of vision in total darkness and the improvement of vision in low light environment. Night vision has existed for more than fifty years. Its importance is remarkable mostly in warfare, though night vision has numerous uses. Modern hunters rely in night vision to hunt animals during the night without being exposed to them
Night vision has had many improvements throughout the course of history. Its beginning date back to Second World War when the Germans idealized a very effective way to easily use their sniper rifles during the night. This was later researched very deeply into because night vision proved to have a devastating advantage for those who used it.
Night vision uses a very complex mechanism some what similar to modern TV's As a matter of fact; more than 200 chemicals substances are needed in order to make night vision product work effectively
There are currently two different technologies for night vision .The first one is thermal vision and second one is regular vision. Both of them are used for detect object, though they both have advantage and disadvantages. On the other hands regular vision cannot function in complete darkness because they
Use technology capable of multiplying existent light by thousands of times -And not detect it from elsewhere.


Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
Rating NIGHT VISION TECHNOLOGY A SEMINAR REPORT Options
Share NIGHT VISION TECHNOLOGY A SEMINAR REPORT To Your Friends :- Seminar Topics Bookmark
Post Reply 

Marked Categories : microchannel, artificial vision seminar report, night vision tech ppt deepika ppt, project using night vision technology, night vision technology seminar, night vision, how night vision works ppt, project report on night vision, night vision technology documentation download, seminar report on night vision, report for night vision technology, pdf of night vision, nightvisiontechnology pdf, search about night vision technology, night vision technology technical seminar, night vision technology seminar report, night vision technology seminar report pdf, ppt on night vision camera, night vision technology, night version technology pdf, night vision technology doc,

[-]
Quick Reply
Message
Type your reply to this message here.


Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Seminar Report On SOFTWARE REUSE pdf seminar projects maker 3 1,181 28-07-2014 12:33 PM
Last Post: mkaasees
  GI-FI-THE NEXT GENERATION WIRELESS TECHNOLOGY. seminar code 0 48 23-07-2014 02:47 PM
Last Post: seminar code
  PALM VEIN TECHNOLOGY seminar code 0 43 22-07-2014 10:53 AM
Last Post: seminar code
  4G TECHNOLOGY seminar code 0 37 22-07-2014 10:35 AM
Last Post: seminar code
  Silent Sound Technology project maker 0 59 21-07-2014 12:27 PM
Last Post: project maker
  BALDEV RAM MIRDHA INSTITUTE OF TECHNOLOGY project maker 0 56 15-07-2014 12:52 PM
Last Post: project maker
  Recycling Technology Innovation project maker 0 106 08-07-2014 03:00 PM
Last Post: project maker
  NANO TECHNOLOGY BASED DATA STORAGE seminar code 0 229 05-07-2014 02:38 PM
Last Post: seminar code
  SIXTH SENSE TECHNOLOGY seminar code 0 94 30-06-2014 04:21 PM
Last Post: seminar code
  DAKNET (WIRELESS TECHNOLOGY) seminar code 0 106 28-06-2014 04:42 PM
Last Post: seminar code
This Page May Contain What is NIGHT VISION TECHNOLOGY A SEMINAR REPORT And Latest Information/News About NIGHT VISION TECHNOLOGY A SEMINAR REPORT,If Not ...Use Search to get more info about NIGHT VISION TECHNOLOGY A SEMINAR REPORT Or Ask Here

Options: