This document discusses infrared technology, including its history, uses, advantages, and applications. It describes how infrared allows wireless communication through short-range signals and how computers can transfer data using infrared ports. The document also outlines the origins of the term "infrared" and how its discovery is attributed to William Herschel in the early 19th century. Key applications discussed include thermography, night vision, missile guidance systems, and industrial heating processes.

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2.  Introduction
 Origins of the Term
 History
 Uses Of Google
 How Infrared Work
 Telecommunication Band
 Advantages
 Disadvantages
 Applications
 Conclusion
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3.  Infrared technology allows computing devices to
communicate via short-range wireless signals.
 With infrared, computers can transfer files and
other digital data bi-directionally.
 Computer infrared network adapters both transmit
and receive data through ports on a device.
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4. Send and receive files
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6.  The name means below red, the Latin infra
meaning "below". Red is the color of the longest
wavelengths of visible light. Infrared light has a
longer wavelength (and so a lower frequency)
than that of red light visible to humans, hence the
literal meaning is below red.
 INFRARED=INFRA+RED
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7.  The discovery of infrared technology is ascribed to
William Herschel, the astronomer, in the early 19th century.
William Herschel
Herschel published his results in 1800 before the Royal Society of London.
 Herschel used a prism to refract light from the sun and detected the infrared,
beyond the red part of the spectrum, through an increase in the temperature
recorded on a thermometer. He was surprised at the result and called them
"Calorific Rays".
 The term 'Infrared' did not appear until late in the 19th century.
prism
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8.  According to the Mountain View-based giant,
Google takes too long to scan books in order to
take them online.
 The main problem behind the older technology of
scanning books lies in the fact that the character
recognition software requires a neat 2D image of
the text.
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10. Received by
infrared
Transform
into code
as binary
data
package
Energy
of light
Electrical
signal pulse
Can take
benefits for
human
The receiver of infrared should have:
- High sensitivity
- Fast response time
Signal
sent
by the
sender
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11. Band Descriptor Wavelength range
O band Original 1260–1360 nm
E band Extended 1360–1460 nm
S band Short wavelength 1460–1530 nm
C band Conventional 1530–1565 nm
L band Long wavelength 1565–1625 nm
U band Ultralong wavelength 1625–1675 nm
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12.  Low power requirements
 Simple and Low circuitry costs
 Higher security
 Portable
 High noise immunity
 No license required
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13.  Line of sight
 Blocked by common materials
 Short range
 Light, weather sensitive
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14.  Thermography:
 Infrared radiation can be used to remotely
determine the temperature of objects.
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16.  Infrared is used in night vision equipment when there is
insufficient visible light to see.
 The use of infrared light and night vision devices should not be
confused with thermal imaging which creates images based on
differences in surface temperature by detecting infrared
radiation (heat) that emanates from objects and their
surrounding environment.
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17.  Infrared tracking or infrared homing, refers to a
passive missile guidance system which uses the
emission from a target of electromagnetic
radiation in the infrared part of the spectrum to
track it.
 Missiles which use infrared seeking are often
referred to as “heat-seekers”
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18. Tracking (Cont….)
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19.  Infrared radiation technology can be used as a deliberate heating
source.
 Infrared heating is also becoming more popular in industrial
manufacturing processes, e.g. curing of coatings, forming of
plastics, annealing, plastic welding, print drying.
 In these applications, infrared heaters replace convection ovens
and contact heating.
 Efficiency is achieved by matching the wavelength of the
infrared heater to the absorption characteristics of the material.
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20. FUTURE WORK
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21.  A newly discovered Apple patent reveals that future iPhones
could use infrared technology to provide sophisticated cameras
that communicate with the objects around them.
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22.  Finally, we hope this project will serve as a solid foundation for future
projects on near infrared technology.
 In future years of this class, we hope that other students will continue
looking into this area. Projects focusing on one type of specific
application of near infrared technology would be able to go into greater
depth on an issue. Also, the ability of some digital cameras to take near
infrared images should be explored more, and a comprehensive model
developed.
 We recommend that students take an interest in this type of project, as
some of the results were quite stunning, and we enjoyed working on
this project immensely. Neither of us had performed much photography
previous to this project, but this project has certainly interested me in
the hobby. We hope you enjoyed the report!
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23. … Thank u…
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