An apparatus for measurement of reflectivity by changing incident angle
Marian Bartkowski, M. Subotowicz · Journal of Physics E Scientific Instruments · 1980
The optical apparatus described permits the measurement of the reflection coefficient R of an investigated sample at incident angles in the range from 8 to 90 degrees . The system is constructed from four plane mirrors and a spherical one. The light path in the apparatus is relatively compact. With aluminium mirrors the transmission of the apparatus is approximately 80%.