A Simple Method for Measuring Absolute Diffuse Reflectance with a Laboratory Spectrophotometer.

摘要

A method is developed for measuring the absolute diffuse reflectance of the reference standard used in making relative diffuse reflectance measurements with an integrating sphere spectrophotometer. No extra experimental set up,such as a second integrating sphere,is required. The method is based on the Kubelka-Munk theory of diffuse reflectance. A graphical procedure is given,and an equation is derived which expresses the absolute reflectance as a function of four readily measurable quantities:two molar concentrations and two relative reflectances. (Modified author abstract)