infrared technology communication

1. Presentation Seminar
on
INFRARED TECHNOLOGY
Presented by –
Ankit Kumar
AEI, 4th year
120070106009

2. Overview
-As next-generation electronic information systems evolve,
it is very essential that all people have access to the
information available via these systems.
-INFRARED technology, holds great potential for accessing
variety of list of information resources.
-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.

3. Introduction
• In this presentation, an introduction to wireless
communication(INFRARED) in general is presented.
• A discussion specific to infrared technology followed
with advantages and disadvantages.
• Wireless communication(infrared), as the term
implies, allows information to be exchanged between
two devices without the use of wire or cable.
• In infrared technology, information is being
transmitted and received using electromagnetic
energy referred as electromagnetic radiation.

4. INFRARED
• INFRARED=INFRA+RED
• Infra means “below”, infrared comprises of wavelength below red.
• The infrared radiation was discovered by
William Herschel, the astronomer, in the
early 19th century.
Infrared is an invisible radiant energy,
electromagnetic radiation with longer
wavelength than visible light.

5. Range
• IrDA spans very short distances.
• Short-range communication (under 5 meter).
• Works in direct “line of sight”.

6. 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”.

7. Infrared Transmitter
• Infrared transmitter uses an infrared light-emitting
diode (LED) or laser diode for transmission.

8. Infrared Receiver
• Photodiode detects and captures the light pulses
which are then processed to retrieve the information
they contain.

9. Infrared Technology
• Infrared technology allows computing devices to
communicate via short-range wireless signals.
• With infrared, computers can transfer files and other
digital data bidirectionally.

10. Performance

11. Application
• Remote control for TV
• Smart phones
• Printers
• Play stations
• Image scanners
• Home security system

13. Night Vision
• Infrared is used in night vision
equipment when there is
insufficient visible light to see.

14. Thermography
• Infrared radiation can
be used to remotely
determine the
temperature of object.
• Thermography camera
detect radiation in
infrared range of
electromagnetic
radiation between 0.9-
14μm.

15. 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).
• 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.

16. 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.
• Light, weather sensitive: direct sunlight, rain, fog, dust,
pollution can affect transmission.
• Speed: data rate transmission is lower than typical wired
transmission.

17. References
• http://trace.wisc.edu/docs/ir_intro/ir_inro.htm
• http://en.m.wikipedia.org/wiki/infrared