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2000
Journal Article
Title

Integrating-sphere diffuser for wireless infrared communication

Abstract
The application of an integrating sphere (IS) as a diffuser in a wireless infrared (IR) network is investigated. Going beyond the simplified analytical model, it is shown that ray-tracing simulations provide realistic data for the optical insertion loss: the transfer function and the far-field light distribution. As an example, a sphere diffuser for a 155 Mbit/s 16-PPM IR transmitter is investigated with an insertion loss of 0.66 dB, a cutoff frequency of 570 MHz and a 104 degrees full width at half-maximum (FWHM) angle of the intensity distribution. The device has also been manufactured using a proprietary material and good agreement between simulation and experimental data is found. A method to increase the FWHM angle and some aspects of eye safety are discussed.
Author(s)
Pohl, V.
Jungnickel, V.
Helmolt, C. von
Journal
IEE Proceedings. Optoelectronics  
DOI
10.1049/ip-opt:20000564
Language
English
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Keyword(s)
  • optical communication

  • optical losses

  • optical transmitters

  • photometry

  • ray tracing

  • safety

  • integrating-sphere diffuser

  • wireless infrared communication

  • wireless ir network

  • ray-tracing simulations

  • optical insertion loss

  • transfer function

  • far-field light distribution

  • sphere diffuser

  • ir transmitter

  • insertion loss

  • half-maximum angle

  • intensity distribution

  • fwhm angle

  • eye safety

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