000029852 001__ 29852
000029852 005__ 20181203015721.0
000029852 0247_ $$2doi$$a10.1016/S0378-7788(00)00103-1
000029852 022__ $$a0378-7788
000029852 02470 $$2DAR$$a1866
000029852 02470 $$2ISI$$a000168003000002
000029852 037__ $$aARTICLE
000029852 245__ $$aExperimental assessment of bi-directional transmission distribution functions using digital imaging techniques
000029852 269__ $$a2001
000029852 260__ $$bElsevier$$c2001
000029852 336__ $$aJournal Articles
000029852 520__ $$aMany daylighting applications require a precise knowledge of the directional transmission features of advanced fenestration materials. These photometric properties are described by a bi-directional transmission distribution function (BTDF), whose experimental assessment requires an appropriate equipment.  A novel bi-directional photogoniometer, based on digital imaging techniques, has been designed and developed for that purpose. The main advantages of this device are the significant reduction of the time required for data measurement and its capability to assess an almost continuous BTDF function. These features can be achieved only through detailed and accurate calibration procedures of the bi-directional photogoniometer, which are described in this paper, together with digital image and data processing. Several experimental results, obtained for different fenestration materials, are used to illustrate the capabilities of this novel equipment.  
000029852 6531_ $$aDaylighting; Photometry; Digital imagery (CCD); Bi-directional transmission distribution function (BTDF); Energy; Simulation
000029852 700__ $$0241777$$aAndersen, Marilyne$$g103938
000029852 700__ $$0241861$$aMichel, L.$$g105854
000029852 700__ $$0241346$$aRoecker, C.$$g106255
000029852 700__ $$0240706$$aScartezzini, J.-L.$$g106368
000029852 773__ $$j33$$k5$$q417-431$$tEnergy & Buildings
000029852 8564_ $$s20967$$uhttps://infoscience.epfl.ch/record/29852/files/02_2001_E%26B%20GonioBTDF.jpg$$zn/a
000029852 8564_ $$s1205289$$uhttps://infoscience.epfl.ch/record/29852/files/Experimental%20assessment%20of%20bi-directional%20transmission.pdf$$yn/a$$zn/a
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000029852 937__ $$aLESO-PB-ARTICLE-2001-004
000029852 970__ $$a12954/LESO-PB
000029852 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000029852 980__ $$aARTICLE
000029852 990__ $$zunexpected date u'May'