THE RECENT AND FUTURE NIGHT VISION TECHNOLOGY

1. NIGHT VISION
TECHNOLOGY
Presented by
R.SRINIVASAN
N.VIGNESH
SHREE MARUTHI POLYTECHNIC COLLEGE
ATTUR

2. What's night vision technology
 Night Vision is that technology that
provides us clear visibility of the field of
an object during night time or under poor
light and improvement of vision in low
light environments.

3. Methods of visualization in
NVT
 Thermal imaging
 Infrared illumination
 Low level imaging

4. Thermal imaging
 A thermographic camera is a device that
forms a heat zone image using infrared
radiation, similar to a
common camera that forms an image
using visible light.
 Instead of the 400–700 nanometer range
of the visible light camera, infrared
cameras operate in wavelengths as long
as 14,000 nm.
 Their use is called thermography.

5. Two ways of processing
 Cooled infrared detectors
 Uncooled infrared detectors

6. Cooled infrared detectors
 Cooled detectors are typically contained in a vacuum-
sealed case and cryogenically cooled.
 Typical operating temperatures
- 4 K to just below room temperature
- modern cooled detectors operate in 60 K to 100 K

7. Uncooled infrared detectors
 Uncooled thermal cameras use a sensor
operating at ambient temperature, or a
sensor stabilized at a temperature close
to ambient using small temperature
control elements.

8. Infrared illumination
 Active infrared night-vision combines
infrared illumination of spectral range 700–
1,000 nm with CCD cameras sensitive to
this light.
 Active infrared night vision is now
commonly found in commercial, residential
and government security applications,
where it enables effective night time

9. Low level imaging
 Image intensification systems support direct
observations by amplifying low levels of available
light. They do not ‘turn night into day’ Nor do they
overcomes the problems that affect vision in low
light environments.
 The image intensifier is a vacuum-tube based
device that converts invisible light from an image
to visible light so that a objects in the dark can be
viewed by a camera or the naked eye.

10. Night

11. Night vision technology in
automobiles
 The reckless accidents that occur on
roads during night times mainly owe to
the poor visibility and make the drivers
rather than driving ahead, predict their
way ahead.
 The use of night vision systems which
uses infra-red sensors or headlights to

12. Two methods in NVT
automobiles
 Near infrared technology
 Far infrared technology

13. Near infrared technology
 The near infrared technology detects the
portion of the IR band nearest to visible
light.
 Special bulbs mounted next to the
headlights are aimed straight ahead like
a car's high beams, but they don't blind
other drivers because the human eye is
insensitive to the infrared light.
 The NIR system is illuminates the
surroundings with infrared light in the
wavelength of 800 to 900nm.

14. Far infrared technology
 The far infrared technology detects energy farther up
the infrared band that is emitted by objects as heat.
 This far IR night vision is also called passive, because
no special light source is required.
 The special camera these systems use - essentially a
phased array of IR detector elements analogous to the
pixels in an ordinary digital camera - creates a
temperature pattern called a thermo gram, which is
refreshed 30 times a second.
 The heat from a pedestrian or an animal is much
greater than the heat coming to the camera from its
surroundings.
 It has been found out that neither of the technologies
has a clear advantage

15. Image representation of NVT

16. Night Vision Devices
 Night vision goggles
 ANVIS
 Infrared cameras
 GPS
 Lidar
 Radar

17. Types of night vision
Technology
There are two types of Night vision system
1) Active System
2) Passive System

18. Active system
 It use an infrared light (Invisible to human) source built
into the car to illuminate the road ahead
 This type enables long ranges (250m) and high
performance in rain and snow.
Advantages
 Higher resolution image, superior picture of inanimate
objects, works better in warmer conditions.

19. Passive system
 Passive systems do not use an infrared light
source, instead they capture thermal radiation
already emitted by the objects, using a thermo-
graphic camera .
Advantages :
 Greater range of about 300 meters, higher
contrast for living objects.

20. Generation 1:

21. Generation 2:

22. Current Generations:

23. Applications
 Military
 Hunting
 Wildlife observation
 Surveillance
 Security
 Navigation
 Hidden-object detection

24. 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 all of us
just be sure to get the right type of our needs.

26. Bibliography
 en.wikipedia.org
 www.seminarsonly.com
 www.google.com
 automotive.electronicspecifier.com