Logo of the Physikalisch-Technische Bundesanstalt

Mathematical Modelling and Data Analysis

Department 8.4

Publication single view


Title: Virtual experiment for near-field goniophotometric measurements
Author(s): F. Schmähling, G. Wübbeler, M. Lopez, F. Gassmann, U. Krüger, F. Schmidt, A. Sperling and C. Elster
Journal: Applied optics
Year: 2014
Volume: 53
Issue: 7
Pages: 1481--7
Optical Society of America
DOI: 10.1364/AO.53.001481
ISSN: 1539-4522
Web URL: http://www.osapublishing.org/viewmedia.cfm?uri=ao-53-7-1481&seq=0&html=true
Keywords: Gonio,Light-emitting diodes,Mathematical methods (general),Metrological instrumentation,Metrology,Photometry,virtual experiment
Tags: 8.4,8.42,Form
Abstract: Near-field goniometric measurements are employed to determine the photometric characteristics of light sources, i.e., the spatial and angular distribution of the emitted light. To this end, a complex measurement system consisting of a goniometer and a CCD-based imaging photometer is employed. In order to gain insight into the measurement system and to enable characterization of the whole measurement setup, we propose to apply a computer model to conduct virtual experiments. Within the computer model, the current state of all parts of the virtual experiment can be easily controlled. The reliability of the computer model is demonstrated by a comparison to actual measurement results. As an example for the application of the virtual experiment, we present an analysis of the impact of axial malpositions of the goniometer and camera.

Back to the list view