infrared technology
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TRANSCRIPT
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Infrared Technology
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ContentsIntroduction Wireless CommunicationIR Data Transmission TechniquesInfrared Data AssociationProjection KeyboardGoogle to Use Infrared system to ScanApplicationsAdvantages and Disadvantages
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IntroductionElectromagnetic radiationHigher frequency wavelengthInvisible light
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Sub-Division Scheme
Near-infraredShort-wavelength infraredMid-wavelength infraredLong-wavelength infraredFar infrared
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Wireless CommunicationShort-range wireless communication. Line of sight communication.Data transmission bidirectionally.Computer infrared network adapters both
transmit and receive data through ports on a device.
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Wireless Communication
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Wireless Communication Infrared technology used in local networks
exists in three different forms: 1 . IrDA-SIR 2 . IrDA-MIR 3 . IrDA-FIR
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Wireless Communication(cont.)Why we use Infrared System ???
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IR Data Transmission TechniquesDirected Beam InfraredOminidirectionalDiffused
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Directed Beam Infrared
Used to create point-to-point linksRange depends on emitted power and degree
of focusingFocused IR data link can have range of
kilometer
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Directed Beam Infrared - II
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Omni directionalSingle base station within line of sight of all other stations
on LANStation typically mounted on ceilingBase station acts as a multiport repeater
Ceiling transmitter broadcasts signal received by IR transceivers
IR transceivers transmit with directional beam aimed at ceiling base unit
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Omni directional - II
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DiffusedAll IR transmitters focused and aimed at a point on
diffusely reflecting ceilingIR radiation strikes ceiling
Reradiated omnidirectionally Picked up by all receivers
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Projection Keyboardvirtual keyboard P-ISM
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Projection Keyboard(cont.)
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Infrared Data Association communication protocol
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Infrared Data Association
IrDA via USB IrDA with mobile phone
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Establishing an Infrared Network
Need infrared port for the connectivity.Port will receive and transmit data.Install the infrared adapters.Work in the direct line of sight direction.The speed of connection is very slow.
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Send and receive files
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Send and receive pictures
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Google to Use Infrared system to ScanAccording to the Mountain View-based giant,
Google, it 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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Google to Use Infrared system to Scan
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AdvantagesLow power requirementsSimple and Low circuitry costsHigher securityPortableHigh noise immunityNo license required
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DisadvantagesLine of sightBlocked by common materials Short rangeLight, weather sensitive
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ApplicationsNight vision equipmentThermographyInfrared photographyIn control remotesIn mobile phone
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Future of infrared technology In the future, it is forecast that this
technology will be implemented in copiers, fax machines, overhead projectors, bank ATMs, credit cards, and headsets.