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Updated: Jul 5, 2026

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material
Published on: May 20, 2013
High-accuracy measurements of the normal specular reflectance
Philippe Voarino1, Hervé Piombini, Frédéric Sabary
1Commissariat à l'Energie Atomique Le Ripault, BP 16, 37260 Monts, France.
Abstract:
The French Laser Megajoule (LMJ) is designed and constructed by the French Commissariat à l'Energie Atomique (CEA). Its amplifying section needs highly reflective multilayer mirrors for the flash lamps. To monitor and improve the coating process, the reflectors have to be characterized to high accuracy. The described spectrophotometer is designed to measure normal specular reflectance with high repeatability by using a small spot size of 100 mum. Results are compared with ellipsometric measurements. The instrument can also perform spatial characterization to detect coating nonuniformity.
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