Infrared tehnology

18 September 2014 NIIT 1

Introduction

Origins of the Term

History

Uses Of Google

How Infrared Work

Telecommunication Band

Advantages

Disadvantages

Applications

Conclusion


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.



Send and receive files


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


The discovery of infrared technology is ascribed to

William Herschel, the astronomer, in the early 19th century.

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

William Herschel

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.




Received by

infrared

Transform

into code

as binary

data

package

Energyof 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

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


Low power requirements

Simple and Low circuitry costs

Higher security

Portable

High noise immunity

No license required


Line of sight

Blocked by common materials

Short range

Light, weather sensitive


Thermography:

Infrared radiation can be used to remotely

determine the temperature of objects.



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.


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”



Tracking (Cont….)

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.



FUTURE WORK

A newly discovered Apple patent reveals that future iPhones

could use infrared technology to provide sophisticated cameras

that communicate with the objects around them.


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!


… Thank u…


Engineering

Infrared tehnology