title: Specular UV reflectance measurements for cavity radiometer design.
abstract: Specular reflectance measurements were made on a black paint used in a solar constant monitoring cavity radiometer. Interference filters peaking at 180, 200, and 220 nm were used in conjunction with a deuterium lamp source and a silicon photodiode detector. Results showed that the black paint was specular for light incident 60 degrees from normal and it reflected ~8% of the light at these wavelengths. We conclude that the high absorptance of the radiometer calculated for visible wavelengths should remain valid down to ~190-nm UV wavelengths.
authors.forename: R L
authors.initials: RL
authors.lastname: Booker