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Using digital cameras as quasi-spectral radiometers to study complex fenestration systems

By Nicholas Gayeski, E. Stokes and Marilyne Andersen

Abstract

This work discusses the use of digital cameras fitted with absorption filters as quasi-spectral radiometers. By filtering incident light into selected wavelength intervals, accurate estimates of radiances can be made for unknown spectra. This approach is being employed as part of a new video-projection goniophotometer to study the properties of angularly and spectrally selective complex fenestration systems. Complex fenestration systems are increasingly being used to distribute solar radiation purposefully in buildings. They can be utilized to optimize energy performance and enhance daylighting. Radiance estimates from calibrated digital cameras enable the assessment of quasi-spectral, bi-directional scattering distribution functions of total radiance transmitted or reflected by a fenestration system over desired wavelength intervals. A silicon and an indium gallium arsenide digital camera are used to enable measurements across a 380 to 1700 nm wavelength interval.Massachusetts Institute of TechnologyNational Science Foundation (U.S.) (Grant No. 0533269

Publisher: 'SAGE Publications'
Year: 2007
DOI identifier: 10.1177/1477153508094651
OAI identifier: oai:dspace.mit.edu:1721.1/66889
Provided by: DSpace@MIT
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