Drift in LED based Photometer

Kasper Paasch, Günter Tittelbach, Thomas Peschel

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


During the development of a low cost industrial optical sensor an unexpected drift phenomenon has shown to be critical to performance. The sensor is based on LED's as light sources and the main source of error could be tracked to the instability of the spatial radiation pattern of the LED's. This instability due to the construction of the sensor introduced an error in the intensity feedback loop. Alternative designs including a Y-coupler, a scattering arrangement and a mirror beam splitter have been investigated and the results are presented.
Translated title of the contributionDrift i LED baserede fotometre
Original languageEnglish
Title of host publicationOptomechanical Engineering and Vibration Control
EditorsEddy A. Derby, Colin G. Gordon, Daniel Vukobratovich, Paul R. Yoder, Carl H. Zweben
PublisherSPIE - International Society for Optical Engineering
Publication date1999
Publication statusPublished - 1999
Externally publishedYes
EventSPIE conference: Optomechanical Engineering and Vibration Control - Denver Convention Center, Denver, United States
Duration: 27. Sept 199930. Sept 1999
Conference number: 534


ConferenceSPIE conference: Optomechanical Engineering and Vibration Control
LocationDenver Convention Center
Country/TerritoryUnited States
SeriesProceedings of SPIE, the International Society for Optical Engineering


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