Infrared technology

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Infrared technology

  1. 1. Contents Introduction Wireless Communication IR Data Transmission Techniques Infrared Data Association Projection Keyboard Google to Use Infrared system to Scan Applications Advantages and Disadvantages
  2. 2. Introduction Electromagnetic radiation Higher frequency wavelength Invisible light
  3. 3. Sub-Division Scheme Near-infrared Short-wavelength infrared Mid-wavelength infrared Long-wavelength infrared Far infrared
  4. 4. Wireless Communication Short-range wireless communication. Line of sight communication. Data transmission bidirectionally. Computer infrared network adapters both transmit and receive data through ports on a device.
  5. 5. Wireless Communication
  6. 6. Wireless Communication Infrared technology used in local networks exists in three different forms: 1 . IrDA-SIR 2 . IrDA-MIR 3 . IrDA-FIR
  7. 7. Wireless Communication(cont.)Why we use Infrared System ???
  8. 8. IR Data TransmissionTechniques Directed Beam Infrared Ominidirectional Diffused
  9. 9. Directed Beam Infrared Used to create point-to-point links Range depends on emitted power and degree of focusing Focused IR data link can have range of kilometer
  10. 10. Directed Beam Infrared - II
  11. 11. Omni directional Single base station within line of sight of all other stations on LAN Station typically mounted on ceiling Base 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
  12. 12. Omni directional - II
  13. 13. Diffused All IR transmitters focused and aimed at a point on diffusely reflecting ceiling IR radiation strikes ceiling  Reradiated omnidirectionally  Picked up by all receivers
  14. 14. Projection Keyboard virtual keyboard P-ISM
  15. 15. Projection Keyboard(cont.)
  16. 16. Infrared Data Association communication protocol
  17. 17. Infrared Data Association IrDA via USB IrDA with mobile phone
  18. 18. 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.
  19. 19. Send and receive files
  20. 20. Send and receive pictures
  21. 21. Google to Use Infrared system toScan According 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.
  22. 22. Google to Use Infrared system toScan
  23. 23. Advantages Low power requirements Simple and Low circuitry costs Higher security Portable High noise immunity No license required
  24. 24. Disadvantages Line of sight Blocked by common materials Short range Light, weather sensitive
  25. 25. Applications Night vision equipment Thermography Infrared photography In control remotes In mobile phone
  26. 26. 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.

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