Infrared tehnology
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This document discusses infrared technology, including its history, uses, advantages, and applications. It describes how infrared allows wireless communication through short-range signals and how computers can transfer data using infrared ports. The document also outlines the origins of the term "infrared" and how its discovery is attributed to William Herschel in the early 19th century. Key applications discussed include thermography, night vision, missile guidance systems, and industrial heating processes.
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Infrared tehnology
- 1. 18 September 2014 NIIT 1
- 2. Introduction Origins of the Term History Uses Of Google How Infrared Work Telecommunication Band Advantages Disadvantages Applications Conclusion 18 September 2014 NIIT 2
- 3. Infrared technology allows computing devices to communicate via short-range wireless signals. With infrared, computers can transfer files and other digital data bi-directionally. Computer infrared network adapters both transmit and receive data through ports on a device. 18 September 2014 NIIT 3
- 4. Send and receive files 18 September 2014 NIIT 4
- 5. 18 September 2014 NIIT 5
- 6. The name means below red, the Latin infra meaning "below". Red is the color of the longest wavelengths of visible light. Infrared light has a longer wavelength (and so a lower frequency) than that of red light visible to humans, hence the literal meaning is below red. INFRARED=INFRA+RED 18 September 2014 NIIT 6
- 7. The discovery of infrared technology is ascribed to William Herschel, the astronomer, in the early 19th century. William Herschel Herschel published his results in 1800 before the Royal Society of London. Herschel used a prism to refract light from the sun and detected the infrared, beyond the red part of the spectrum, through an increase in the temperature recorded on a thermometer. He was surprised at the result and called them "Calorific Rays". The term 'Infrared' did not appear until late in the 19th century. prism 18 September 2014 NIIT 7
- 8. According to the Mountain View-based giant, Google 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. 18 September 2014 NIIT 8
- 9. 18 September 2014 NIIT 9
- 10. Received by infrared Transform into code as binary data package Energy of light Electrical signal pulse Can take benefits for human The receiver of infrared should have: - High sensitivity - Fast response time Signal sent by the sender 18 September 2014 NIIT 10
- 11. Band Descriptor Wavelength range O band Original 1260–1360 nm E band Extended 1360–1460 nm S band Short wavelength 1460–1530 nm C band Conventional 1530–1565 nm L band Long wavelength 1565–1625 nm U band Ultralong wavelength 1625–1675 nm 18 September 2014 NIIT 11
- 12. Low power requirements Simple and Low circuitry costs Higher security Portable High noise immunity No license required 18 September 2014 NIIT 12
- 13. Line of sight Blocked by common materials Short range Light, weather sensitive 18 September 2014 NIIT 13
- 14. Thermography: Infrared radiation can be used to remotely determine the temperature of objects. 18 September 2014 NIIT 14
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- 16. Infrared is used in night vision equipment when there is insufficient visible light to see. The use of infrared light and night vision devices should not be confused with thermal imaging which creates images based on differences in surface temperature by detecting infrared radiation (heat) that emanates from objects and their surrounding environment. 18 September 2014 NIIT 16
- 17. Infrared tracking or infrared homing, refers to a passive missile guidance system which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles which use infrared seeking are often referred to as “heat-seekers” 18 September 2014 NIIT 17
- 18. Tracking (Cont….) 18 September 2014 NIIT 18
- 19. Infrared radiation technology can be used as a deliberate heating source. Infrared heating is also becoming more popular in industrial manufacturing processes, e.g. curing of coatings, forming of plastics, annealing, plastic welding, print drying. In these applications, infrared heaters replace convection ovens and contact heating. Efficiency is achieved by matching the wavelength of the infrared heater to the absorption characteristics of the material. 18 September 2014 NIIT 19
- 20. FUTURE WORK 18 September 2014 NIIT 20
- 21. A newly discovered Apple patent reveals that future iPhones could use infrared technology to provide sophisticated cameras that communicate with the objects around them. 18 September 2014 NIIT 21
- 22. Finally, we hope this project will serve as a solid foundation for future projects on near infrared technology. In future years of this class, we hope that other students will continue looking into this area. Projects focusing on one type of specific application of near infrared technology would be able to go into greater depth on an issue. Also, the ability of some digital cameras to take near infrared images should be explored more, and a comprehensive model developed. We recommend that students take an interest in this type of project, as some of the results were quite stunning, and we enjoyed working on this project immensely. Neither of us had performed much photography previous to this project, but this project has certainly interested me in the hobby. We hope you enjoyed the report! 18 September 2014 NIIT 22
- 23. … Thank u… 18 September 2014 NIIT 23