Optical properties of glazing materials at normal incidence

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Measurements of spectral transmittance T and reflectance R at normal incidence continue to be the most common and accurate source of energy performance data for glazing materials. Prediction of these radiometric properties from more fundamental materials data is often confounded by the complexity and uncertainty of coating structures. Angle-dependent radiometric properties of coated glazing will probably be predicted from normal-incidence data rather than being measured at many angles. The general error level demonstrated in round-robin tests is on the order 1-2%; it is often necessary to achieve better levels of performance. Based on results obtained following the round-robin tests, it ... continued below

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Rubin, M. & Powles, R. October 1, 2001.

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Description

Measurements of spectral transmittance T and reflectance R at normal incidence continue to be the most common and accurate source of energy performance data for glazing materials. Prediction of these radiometric properties from more fundamental materials data is often confounded by the complexity and uncertainty of coating structures. Angle-dependent radiometric properties of coated glazing will probably be predicted from normal-incidence data rather than being measured at many angles. The general error level demonstrated in round-robin tests is on the order 1-2%; it is often necessary to achieve better levels of performance. Based on results obtained following the round-robin tests, it is expected that accuracy of better than 0.5% can be generally achieved. A new type of absolute standard reference is described and tested with promising results.

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OSTI as DE00785321

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  • CEN Workshop on Glazing, Paris (FR), 10/05/2000--10/06/2000

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  • Report No.: LBNL--48322
  • Report No.: OM-434
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 785321
  • Archival Resource Key: ark:/67531/metadc716222

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  • October 1, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 5, 2016, 5:38 p.m.

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Rubin, M. & Powles, R. Optical properties of glazing materials at normal incidence, article, October 1, 2001; California. (digital.library.unt.edu/ark:/67531/metadc716222/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.