Measurement of the hemispherical reflectance and transmittance at variable angles of incidence
Book
·
OSTI ID:197632
- Fraunhofer Inst. for Solar Energy Systems, Freiburg (Germany)
An apparatus was built to measure the spectral hemispherical reflectance and transmittance at variable angles of incidence. The apparatus consists of a Fourier-transform spectrometer, polarizers and two integrating spheres. With one of the spheres, transmittance measurements can be performed, with the other, reflectance or absorptance measurements depending on the transmittance of the samples. The measurement range for transmittance measurements is from 400nm to 2,500nm and for reflectance or absorptance measurements from 400nm to 1,900nm. The design of the spheres and the optical set-up is described. The measurement accuracy was determined by measuring well-defined samples. Examples of measurements of different solar selective absorber coatings and anti-reflection layers are shown.
- OSTI ID:
- 197632
- Report Number(s):
- CONF-950793--; ISBN 0-8194-1890-0
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solar optical properties and scattering of monolithic aerogel materials
An optical characterization platform for transparent insulation materials in solar energy
Optimization of SiO{sub 2}-TiN{sub x}O{sub y}-Cu interference absorbers: Numerical and experimental results
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:194874
An optical characterization platform for transparent insulation materials in solar energy
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:194865
Optimization of SiO{sub 2}-TiN{sub x}O{sub y}-Cu interference absorbers: Numerical and experimental results
Book
·
Thu Dec 30 23:00:00 EST 1993
·
OSTI ID:201328