6
Infra Red
6.1 Background
Besides wireless applications based on WLAN and Bluetooth technologies communication via infrared radiation is on offer since some time. Infrared is light with wavelengths between 7.8 x 10–7 and 10–3 m corresponding to a frequency range of 3 x 1011 Hz up to 4 x 1014 Hz. One advantage of infrared radiation is its marginal harmfulness and susceptibility against electrical interference. One disadvantage is its small reach. Other advantages include:
- Simple and low cost implementation
- Low electrical power requirements
- Directed point to point connection
- Efficient and reliable data transmission.
For infrared communication standards have been developed which are oriented to possible applications. In the following these ...
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