000153390 001__ 153390
000153390 005__ 20180913060015.0
000153390 0247_ $$2doi$$a10.1177/1477153506071332
000153390 022__ $$a1477-1535
000153390 02470 $$2ISI$$a000243011700003
000153390 037__ $$aARTICLE
000153390 245__ $$aValidation of the performance of a new bidirectional video-goniophotometer
000153390 269__ $$a2006
000153390 260__ $$bSAGE Publications$$c2006
000153390 336__ $$aJournal Articles
000153390 520__ $$aAn accurate knowledge of the directional optical properties of advanced fenestration materials is necessary for them to be adequately integrated in buildings. These properties are expressed by the Bidirectional Transmission (or Reflection) Distribution Functions (BTDF, BRDF) of such elements, which are measured by specifically designed measuring equipment: an innovative, time-efficient bidirectional goniophotometer, based on digital imaging techniques, was designed and set up for that purpose. In this paper, the in-depth validation used for the bidirectional measurements performed with this apparatus is presented. It is based on different approaches including experimental error estimation, comparisons to analytical or ray-tracing based models and to other measured data, and calculation of the directional-hemispherical transmittance (reflectance) gauged against measurements of the same systems with Ulbricht (integrating) spheres. The high accuracy and reliability of this novel device were confirmed by this detailed investigation, and led to a maximum error for BT(R)DF data of only 10%.
000153390 6531_ $$aTransmission
000153390 6531_ $$aReflection
000153390 700__ $$0241777$$aAndersen, Marilyne$$g103938
000153390 773__ $$j38$$k4$$q295-313$$tLighting Research & Technology
000153390 8564_ $$s644673$$uhttps://infoscience.epfl.ch/record/153390/files/14_2006_LR%26T%20ValidBTRDF_1.png$$yn/a
000153390 8564_ $$s1086012$$uhttps://infoscience.epfl.ch/record/153390/files/Validation%20of%20the%20performance%20of%20a%20new.pdf$$yn/a$$zn/a
000153390 909C0 $$0252313$$pLIPID$$xU12325
000153390 909CO $$ooai:infoscience.tind.io:153390$$particle$$pENAC
000153390 917Z8 $$x173008
000153390 917Z8 $$x106554
000153390 917Z8 $$x106554
000153390 917Z8 $$x106554
000153390 917Z8 $$x173008
000153390 937__ $$aEPFL-ARTICLE-153390
000153390 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000153390 980__ $$aARTICLE