Based on Image Processing

1. The Heated Time
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World through Thermal Imaging
Gunjan Gupta, Romil Shah
Department of Electronics and Communication Engineering,
Institute of Technology,
Nirma University, Ahmedabad, India PIN-382481
Email: gunjan101@gmail.com, rams16592@gmail.com
(M): 7874011424, 9727757880
Reg ID: FP-044

2. A Brief Glance : Intro
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Thermal Imaging is all based on the concept
of IR imaging.
Unlike visible band optical imaging
sensors, there was limited usage of wet film
media with thermal imaging systems, most of
which were based on electro-optical
hardware.
To appreciate how thermal imaging system
produce imagery without sunlight it is
necessary to explore the underlying physics.

4. Thermal Sensors : History
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The earliest and simplest thermal imaging
sensors were film cameras. These required
unique lens materials, such as Germanium, Zinc
Sulphide or Zinc Selenide, and infrared sensitive
films, which had to be refrigerated during
storage, use and developing.
A large cost component in all infrared imaging
devices is in the optics, since conventional
glasses are unusable. A lens for such a system
must use a material transmissive in the infrared
band of interest, and the lens geometry must
reflect the properties of the material and larger
wavelengths involved.

6. How TI works
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A special lens focuses the infrared light emitted.
The focused light is scanned by a phased array of infrareddetector elements forming a patter called thermogram.
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.

8. Quantum Well Imaging
Photodetectors (QWIP)
imager operating in
the longwave band.
QWIP imager
operating in the
midwave band

9. Imagery produced by L-3 Cincinnati Electronics 2048 x
2048 pixel midwave band imaging array(L-3).