Mesures de constantes optiques en transmission – Spectromètre BRUKER Vertex 80v

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Authors
  1. Gagné, G.
  2. Tremblay, G.
Corporate Authors
Defence Research and Development Canada, Valcartier Research Centre, Quebec QC (CAN)
Abstract
In the framework of contract W7701-166095/001/QCL, AEREX Avionics Inc. continued the work began under contract W7701-135517/001/QCL, task 6. It consisted in reviewing the methods used at DRDC Valcartier to measure the optical constants of various solid and liquid materials in the spectral bands 2 µm to 25 µm, adapting them to the 210 nm to 2 µm bands, and comparing measurement results to a spectral library. In this document, we describe the methodology developed to measure and evaluate in transmission the optical constants of liquids with a Fourier transform spectrometer Vertex 80v of the Bruker Company based on the Pacific Northwest National Laboratory (PNNL) methodology. We discuss the problematic encountered and present n and k values for Isopropanol, ethylene glycol, dimethylsiloxane, ethanol, methyl salicylate and diesel. Values of n and k measured during this work are very close to those published by PNNL. The difference for the isopropanol is under 2%. A method to estimate the value of n for a non-referenced liquid using the interferential fringes of measurements is presented. Tests demonstrated that the error relative to PNNL measurements is under 2%, and the estimated values of n from the measurements of different liquid thicknesses vary by less than 1%.

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Keywords
optical constants;spectrometer;polarization
Report Number
DRDC-RDDC-2016-C270 — Contract Report
Date of publication
01 Sep 2016
Number of Pages
87
DSTKIM No
CA043244
CANDIS No
804542
Format(s):
Electronic Document(PDF)

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