This document discusses night vision technology. It describes how night vision devices work by either amplifying available light through image intensification or detecting infrared radiation through thermal imaging. Night vision devices are classified into generations based on improvements in image resolution and light amplification. Generation 3 devices offer the best performance with gallium arsenide photocathodes and microchannel plates providing high resolution images. Night vision has military and civilian applications in low-light conditions for tasks such as navigation, surveillance and hunting.
Hi guys these is a presentation which is based on lastest topic so called as night vision technology [NVT] .Here i have covered all the imp things required for presentation.Hope u enjoy it ,if u like the stuff please fallow and comment below.I can also provide u the document part also.
Night vision technology, by definition, literally allows one to see in the dark. Originally
developed for military use, it has provided the United States with a strategic military
advantage, the value of which can be measured in lives. Federal and state agencies now
routinely utilize the technology for site security, surveillance as well as search and
rescue. Night vision equipment has evolved from bulky optical instruments in lightweight
goggles through the advancement of image intensification technology.
Night vision is technology that provides users with some vision in total darkness and improved vision in low-light environments.
The most common applications include night driving or flying, night security and surveillance, wildlife observation, sleep lab monitoring and search and rescue. Night vision is often used by the military and also has recreational purposes, like use on home video cameras or during night hiking.
Seminar on night vision technology pptdeepakmarndi
ppt of night vission technology. this is made under the guidance of teacher. withe this report also given in theis side. main things report is given according to the ppt...........
Hi guys these is a presentation which is based on lastest topic so called as night vision technology [NVT] .Here i have covered all the imp things required for presentation.Hope u enjoy it ,if u like the stuff please fallow and comment below.I can also provide u the document part also.
Night vision technology, by definition, literally allows one to see in the dark. Originally
developed for military use, it has provided the United States with a strategic military
advantage, the value of which can be measured in lives. Federal and state agencies now
routinely utilize the technology for site security, surveillance as well as search and
rescue. Night vision equipment has evolved from bulky optical instruments in lightweight
goggles through the advancement of image intensification technology.
Night vision is technology that provides users with some vision in total darkness and improved vision in low-light environments.
The most common applications include night driving or flying, night security and surveillance, wildlife observation, sleep lab monitoring and search and rescue. Night vision is often used by the military and also has recreational purposes, like use on home video cameras or during night hiking.
Seminar on night vision technology pptdeepakmarndi
ppt of night vission technology. this is made under the guidance of teacher. withe this report also given in theis side. main things report is given according to the ppt...........
Night Vision Technology mainly implies different methods that has proven to be miracle for the human beings for a brighter and clearer view of an image in low light or darkness conditions.
Here is documentation part for the night vision technology which is a latest everything technology.Have the look at these and enjoy the documentation,for more updates please follow me @shobha rani
The first thing you probably think of when you see the words night vision is a spy or action movie you've seen, in which someone straps on a pair of night-vision goggles to find someone else in a dark building on a moonless night. And you may have wondered "Do those things really work? Can you actually see in the dark?"
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
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• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
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When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
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2. Contents..
What is night vision
Night Vision Approaches
The night vision technology
Working of night vision device
Generations
Applications
Advantage
Disadvantage
Conclusion
References
3. What is Night Vision ???
Ability to see in dark environment.
Whether by biological or technological means, night vision is made possible by a
combination of two approaches: sufficient spectral range, and sufficient intensity
range.
Humans have poor night vision compared to many animals, in part because the
human eye does not have a tapetum lucidum.
The tapetum lucidum(Latin: "bright tapestry", plural tapeta lucida) is a layer of
tissue in the eye of many animals, that lies immediately behind or sometimes within
the retina. It reflects visible light back through the retina, increasing the light
available to the photoreceptors. This improves vision in low-light conditions.
4. Night Vision Approaches
Spectral range :
Night-useful spectral range techniques make the viewer sensitive to types
of light that would be invisible to a human observer.
Human vision is confined to a small portion of the electromagnetic
spectrum called visible light.
Enhanced spectral range allows the viewer to take advantage of non-
visible sources of electromagnetic radiation (such as near-infrared or
ultraviolet radiation).
Some animals can see well into the infrared and/or ultraviolet compared to
humans, enough to help them see in conditions humans cannot.
5. INTENSITY RANGE
Sufficient intensity range is simply the ability to see with very small
quantities of light.
Although the human visual system can, in theory, detect single photons
under ideal conditions, the neurological noise filters limit sensitivity to a
few tens of photons even in ideal conditions.
Many animals have better night vision than humans do,
Enhanced intensity range is achieved via technological means through the
use of an image intensifier, gain multiplication CCD, or other very low-
noise and high-sensitivity array of photo detectors.
6. Night Vision Device
A night vision device (NVD) is
an optical instrument 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 figure shows night vision
goggle.
7. EXAMPLES :
1.
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 handsfree use
with a harness or
helmet attachment
8. 2.
Another example is binoculars night vision device.
Binocular telescopes, or binoculars (also known as field glasses), are two
identical or mirror-symmetrical telescopes mounted side-by-side and aligned to
point accurately in the same direction, allowing the viewer to use both eyes
(binocular vision) when viewing distant objects.
10. Working of Night Vision devices
Night Vision technology consists of two major types:
i. image intensification (light amplification) and
ii. Thermal imaging(infrared).
11. IMAGE INTENSIFICATION
It is also called light amplification
It is less expensive than thermal
Light amplification technology takes
the small amount of light, such as
moonlight or starlight, that is in the
surrounding area, and converts the
light energy (scientists call it
photons), into electrical energy
(electrons)
These electrons pass through a thin
disk that's about the size of a quarter
and contains over 10 million
channels.
As the electrons travel through and
strike the walls of the channels,
thousands more electrons are
released.
12. Cont….
These multiplied electrons then bounce off of a phosphor screen which
converts the electrons back into photons and lets you see an impressive
night time view even when it's really dark.
All image intensified night vision products on the market today have one
thing in common: they produce a green output image
13. WORKING OF THERMAL IMAGING
A special lens focuses the infrared light emitted by all of the objects in
view.
The focused light is scanned by an infrared-detector elements. The detector
elements create a very detailed temperature pattern called a thermogram. It
only takes about one-thirtieth of a second for the detector array to obtain
the temperature information to make the thermogram. This information is
obtained from several thousand points in the field of view of the detector.
The thermogram created by the detector elements is translated into electric
impulses.
The impulses are sent to a signal-processing unit, a circuit board with a
dedicated chip that translates the information from the elements into data
for the display.
The signal-processing unit sends the information to the display, where it
appears as various colors depending on the intensity of the infrared
emission. The combination of all the impulses from all of the elements
creates the image.
14. Types Of Thermal Imaging Device
There are two common types of thermal-imaging devices:
i. Un –Cooled
ii. cryogenically Cooled
Un-Cooled
This is the most common type of thermal-imaging device. The infrared-detector
elements are contained in a unit that operates at room temperature. This type of
system is completely quiet, activates immediately and has the battery built right in.
15. Cryogenically Cooled
More expensive and more susceptible to damage from rugged use, these systems
have the elements sealed inside a container that cools them to below 32 F (zero C).
The advantage of such a system is the incredible resolution and sensitivity that
result from cooling the elements. Cryogenically-cooled systems can "see" a
difference as small as 0.2 F (0.1 C) from more than 1,000 ft (300 m) away, which is
enough to tell if a person is holding a gun at that distance.
Unlike most night-vision equipment which uses image-enhancement technology,
thermal imaging is great for detecting people or working in near-absolute darkness
with little or no ambient lighting (i.e. stars, moonlight, etc, )
17. GENERATION 0
The first night vision devices, the M1 and M3 infrared night sighting
devices, also known as the "sniperscope" or "snooperscope", were
introduced by the US Army in World War II, and also used in the Korean
War, to assist snipers.
They were active devices, using a large infrared light source to illuminate
targets.
Their image intensifier tubes function using an anode and an S-1
photocathode, made primarily of silver, cesium and oxygen to accelerate
the electrons
18. GENERATION 1
First generation passive devices, introduced during the Vietnam War were
an adaptation of earlier active Gen 0 technology, and rely on ambient light
instead of an infrared light source. Using an S-20 photocathode, their image
intensifiers produce a light amplification of around 1000x, but are quite
bulky and require moonlight to function properly.
Examples:
i. AN/PVS-2
19. GENERATION 2
Second generation devices featured an improved image-intensifier tube
utilizing micro-channel plate (MCP) with an S-25 photocathode , resulting in a
much brighter image, especially around edges of the lens. This leads to
increased illumination in low ambient light environments, such as moonless
nights. Light amplification was around 20000x Also improved were image
resolution and reliability.
Examples:
a) AN/PVS-4
b) N/PVS-5
c) SUPERGEN
20. GENERATION 3
Third generation night vision systems maintain the MCP from Gen II, but now
use a photocathode made with gallium arsenide, which further improves image
resolution. In addition, the MCP is coated with an ion barrier film for increased
tube life. The light amplification is also improved.
Examples:
a) AN/PVS-7
b) NVS-7
c) AN/PVS-14
d) NVS-14
e) XD-4
21. Advantage of Gen 3 over Gen 2
Gen 3 technology improves night operational effectiveness for military
users of night vision goggles and other night vision devices.
The filmless MCP provides a higher signal-to-noise ratio than Gen 2,
resulting in better image quality (less scintillation) under low-light
conditions.
The gated power supply further improves image resolution under high light
conditions, and the reduced halo minimizes interference from bright light
sources. These improvements also substantially increase the detection
range of the system.
22. How Far Can We See ??
There are many different variables that can effect the distance that you we
see with a Night Vision device.
First which object we want to see.
The larger the object the easier it is too see.
Second. Another variable is lighting conditions. The more ambient light we
have (starlight, moonlight, infrared light) the better and further we will be
able to see .If it is cloudy and overcast then we typically state that we can
tell the difference between a male and a female or a dog and a deer at about
75 to 100 yards.
If there is ambient light then we can see about 500 yards.
23. BLACK SPOTS ON THE SCREEN
As we look through a night vision
device we may notice black spots
on the screen. A NVD is similar to
a television screen and attracts
dust and dirt. Typically these spots
can be cleaned.
These black spots will not affect
the performance or reliability of
the night vision device.
25. ADVANTAGES
An increase in nighttime situational awareness for pilots.
This would markebly decrease the possibility of collisions with terrain or
man-made obstructions.
It does permit the user to see objects that normally would not be seen by
the unaided eye.
26. DISADVANTAGES
Lack of color discrimination.
Neck strain and fatigue.
High initial cost to purchase.
Require on-going maintenance.
Need for recurrent training.
Decreased field of aided view .
27. Conclusion
Through night vision device we can see the object in dark
environment.
We have seen four generation of this devices and seen different
ranges.
Initially this device was used by military but now it also available
for civilians.
The innovation and implementation of night vision system has a
great impact on automotive session such as saving many lives
from death reducing accidents at night.