Infrared Technology About Infrared Communication

[asimrsiddiqui 0]

Infrared radiation is the region of the electromagnetic spectrum between microwaves and visible light. In infrared communication an LED transmits the infrared signal as bursts of non-visible light. At the receiving end a photodiode or photoreceptor detects and captures the light pulses, which are then processed to retrieve the information they contain. Some common applications of infrared technology are listed below.

 

Augmentative communication devices

Car locking systems

Computers

a. Mouse

b. Keyboards

c. Floppy disk drives

d. Printers

 

Emergency response systems

Environmental control systems

a. Windows

b. Doors

c. Lights

d. Curtains

e. Beds

f. Radios

 

Headphones

Home security systems

Navigation systems

Signage

Telephones

TVs, VCRs, CD players, stereos

Toys

Infrared technology offers several important advantages as a form of wireless communication. Advantages and disadvantages of IR are first presented, followed by a comparative listing of radio frequency (RF) advantages and disadvantages.

 

 

 

 

IR Advantages:

Low power requirements: therefore ideal for laptops, telephones, personal digital assistants

Low circuitry costs: $2-$5 for the entire coding/decoding circuitry

Simple circuitry: no special or proprietary hardware is required, can be incorporated into the integrated circuit of a product

Higher security: directionality of the beam helps ensure that data isn't leaked or spilled to nearby devices as it's transmitted

Portable

Few international regulatory constraints: IrDA (Infrared Data Association) functional devices will ideally be usable by international travelers, no matter where they may be

High noise immunity: not as likely to have interference from signals from other devices

 

 

 

IR Disadvantages:

Line of sight: transmitters and receivers must be almost directly aligned (i.e. able to see each other) to communicate

Blocked by common materials: people, walls, plants, etc. can block transmission

Short range: performance drops off with longer distances

Light, weather sensitive: direct sunlight, rain, fog, dust, pollution can affect transmission

Speed: data rate transmission is lower than typical wired transmission

[daniel151405241469 0]

infrared is called infrared because it is just before red on the spectrum (it is NOT red!). Also, ultraviolet is called untraviolet because it is after violet in the spectrum.

[roberrtk 0]

Removed