TK 2133 DATA COMMUNICATION AND TELECOMMUNICATION INFRARED PREPARED BY: 1)GAN BOON CHONG(A108946) 2)KOAY BEE JUNE(A108508) 3)LOW YEAN LEE(A108840)

INFRARED  Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwaves.  Infrared radiation spans three orders of magnitude and has wavelengths between approximately 750 nm and 1 mm.  “Near infrared" light is closest in wavelength to visible light and "far infrared" is closer to the microwave region of the electromagnetic spectrum

Far infrared waves are thermal. Shorter, near infrared waves are not hot at all - in fact you cannot even feel them. IR wireless cannot pass through walls.

INFRARED DATA TRANSMISSION Infrared wireless transmitters use light beams at infrared frequencies to send communication signals from the transmitter to the receiver. Infrared transmitters generate strong signals to prevent interference from other light sources. The communication systems work well mainly because of their high bandwidth. These systems can deliver data at speeds of 10 Mbps to 100 Mbps.

IR wireless is used for short- and medium- range communications and control. Some systems operate in line-of-sight mode; this means that there must be a visually unobstructed straight line through space between the transmitter (source) and receiver (destination). Other systems operate in diffuse mode (scatter mode). This type of system can function when the source and destination are not directly visible to each other.

ADVANTAGE OF INFRARED Low power requirements-ideal for laptops, telephones, personal digital assistants Low circuitry costs: $2-$5 for the entire coding / decoding circuitry incorporated into the integrated circuit of a product Simple circuitry: no special hardware is required, can be Higher security: directionality of the beam helps ensure that data isn't leaked or spilled to nearby devices as it's transmitted

High noise immunity: not as likely to have interference from signals from other devices Few international regulatory constraints: IrDA (Infrared Data Association) functional devices will ideally be usable by international travelers, no matter where they may be Portable

DISADVANTAGE OF INFRARED Line of sight: transmitters and receivers must be almost directly aligned to communicate (see each other) Blocked by common materials-people, walls, plants-can block transmission. IR communications or control is generally not possible between different rooms in a house, or between different houses in a neighborhood (unless they have facing windows).

Light, weather sensitive-direct sunlight, rain, fog, dust, pollution can affect transmission Speed: data rate transmission is lower than typical wired transmission Short range: performance drops off with longer distances

Remote Control Examples of remote control:  Television remote control  Air-conditional remote control  Car locking system

Infrared Mouse/Keyboard

Infrared in Mobile

Infrared Thermometer

Infrared Astronomy

Infrared Thermography

Infrared in Medical Thermal scan of loss of circulation in fingers due to Reynauds Disease Thermal scan showing inflammation in anterior portion of knee

Infrared sensors

Infrared Sauna Therapy Advantages of infrared sauna therapy:  Reduces scaring from wounds or surgery.  Leaves skin smooth and soft.  Improves skin tone and elasticity.  Cleans pores of toxins  Breaks down cellulite fat

Infrared Heat Application:  Welding of plastic components Technology:  short wave emitters matching exactly to the product  automated process, done by robots Advantages:  faster welding process  better quality of product  less fumes