Perkin Elmer Lambda 900

This is an upgraded PE Lambda-900 UV-VIS-NIR Spectrophotometer that has equipped with a PELA-1029 Absolute Specular Reflectance Accessory(�V-W� optical geometry). This accessory is the primary instrument used in the characterization of the reflectance properties of optical materials worldwide. The �VW Geometry� introduces two reflections at the sample. This is advantageous for samples with high reflectivity since the signal change to be measured is twice as large. However, the need for two reflections makes this unsuitable for small samples, especially at higher angles of incidence. It is also unsuitable for samples of low reflectance.