1966•Mineralogical Magazine and Journal of the Mineralogical SocietyRequires access
A new method for the absolute measurement of reflectivity
Peter Bradshaw, R. Phillips, Russell Smith
Open publisher page 3 citations
Abstract
Summary The theory of a new method for the determination of reflectivity at truly normal incidence is described. A parallel light beam falls on the specimen after passing through a glass cube with semi-silvered diagonal mounted at the centre of an optical goniometer. The various reflected beams are measured by a photomultiplier fixed to the telescope of the goniometer. Experiment has proved the validity of the method and the spectral reflectivity of pyrite in air and in oil has been investigated.