Optical assessment of nonimaging concentrators

Andreas Timinger, Abraham Kribus, Harald Ries, Toni Smith, Markus Walther

Research output: Contribution to journalArticlepeer-review


An optical measurement method for nonimaging radiation concentrators is proposed. A Lambertian light source is placed in the exit aperture of the concentrator. Looking into the concentrator’s entrance aperture from a remote position, one can photograph the transmission patterns. The patterns show the transmission of radiation through the concentrator with the full resolution of the four-dimensional phase space of geometric optics. By matching ray-tracing simulations to the measurement, one can achieve detailed and accurate information about the geometry of the concentrator. This is a remote, noncontact measurement and can be performed in situ for installed concentrators. Additional information regarding small-scale reflector waviness and surface reflectivity can also be obtained from the same measurement with additional analysis.

Original languageEnglish
Pages (from-to)5679-5684
Number of pages6
JournalApplied Optics
Issue number31
StatePublished - 1 Nov 2000
Externally publishedYes


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