Modren telecom technology, Lecture notes of Computer science

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Infra Red Technology

Overview



As next-generation electronic information

systems evolve, it is very essential that all

people have access to the information

available via these systems.



Overview



Already infrared is commonly used in remote control of

TVs, VCRs and CD players, infrared technology is also

being used and developed for remote control of

environmental control systems, personal computers,

and phones.



3أجهزة3د ب3ائع في التحكم عن بع3كل ش3راء بش3عة تحت الحم3تخدم األشس k ت

3دمج3ة، كم3ا3يتم3م3 ق3راص ال3ل األ3ي3ه3زة تش3غ3جه3زة3الفي3ديو3وأج3فزي3ون وأ3لتلا

3ع3د بأنظم3ة3كم عن ب3لحم3راء للتح33تحت ا3ني3ة األش3عة3ط3وير تق3خدام وتاس3ت

التحكم البيئي وأجهزة الكمبيوتر الشخصية والهواتف.

Introduction



Wireless communication (infrared), as the term

implies, allows information to be exchanged between

two devices without the use of wire or cable.



INFRARED



INFRARED=INFRA+RED



Infra means "below", infrared comprises of wavelength below

red.

"أسفل"، وتشمل األشعة تحت الحمراء األطوال الموجية األقل Infra تعني كلمة

من اللون األحمر.



The infrared radiation was discovered by

تم اكتشاف اإلشعاع تحت األحمر بواسطة



William Herschel, the astronomer, in the



ويليام هيرشل، عالم الفلك

INFRARED



early 19th century.





Infrared is an invisible radiant energy,





electromagnetic radiation



Range



IrDA spans very short distances.



ا IrDA تغطي منطقة ‰



Short-range communication (under 5 meter).



Infrared transmission



"Infrared transmission refers to energy in the region

of the electromagnetic radiation spectrum at

wavelength longer than those of visible light but

shorter than those of radio waves".



Infrared Receiver



Photodiode detects and captures the light

pulses which are then processed to retrieve

the information they contain.





Transmitter R class Receiver R class



R 3ة3تقبال من الفئ3از اس، جهR 3ة3ال من الفئ3از إرسجه

Infrared Technology



Infrared technology allows computing devices to

communicate via short-range wireless signals



Application



Remote Control.



Smart phones.



Printers.

 Play Stations.



Image Scanners.



Home Security System.

Night Vision



Infrared is used in night vision equipment when

there is insufficient visible light to sea



k

Advantages



Low power requirement: therefore ideal for laptops, telephones,

personal digital assistants.



Simple circuitry: no special or proprietary hardware is required, can be

incorporated into the integrated circuit of a product.





Low circuitry cost (for the entire coding/decoding circuitry).

Advantages



Higher security: directionality of the beam helps ensure that

data isn't leaked to nearby devices.





High noise immunity: not as likely to have interference from

signals from other devices.





Portable.