Fourier Transform Infrared System Measurement of the Bidirectional Reflectivity of Diffuse and Grooved Surfaces

Author:

Ford J. N.1,Tang K.1,Buckius R. O.1

Affiliation:

1. Department of Mechanical and Industrial Engineering, University of Illinois, 1206 West Green Street, Urbana, IL 61801

Abstract

A system based on a Fourier transform infrared spectrometer is developed to perform bidirectional reflectivity measurements on material surfaces, providing the ability to measure this property simultaneously for multiple infrared wavelengths. Calibration is based on a relative method that relates the system output to absolute spectral bidirectional reflectivity. Results are presented for rough gold and grooved nickel surfaces, considering the variation with incident and reflected angle. The surface reflectivity for gold is largely independent of wavelength in the infrared region of interest, while the nickel surface exhibits spectral variation. The experimental results are compared to complete electromagnetic theory predictions and other measurements.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference28 articles.

1. American Society for Testing and Materials, 1990, ASTM Standard E1392–90: Standard Practice for Angle Resolved Optical Scatter Measurements on Specular or Diffuse Surfaces, Philadelphia, PA.

2. Berets, S., Harrick, N. J., and Milosevic, M., 1991, unpublished data on polished aluminum surfaces, Harrick Scientific Corp., Ossining, NY.

3. Bernt, M., 1994, TMA Technologies, Inc., Bozeman, MT, private communication.

4. Brewster, M. Q., 1992, Thermal Radiative Transfer & Properties, Wiley, New York.

5. Clarke F. J. J. , GarforthF. A., and ParryD. J., 1983, “Goniophotometric and Polarization Properties of White Reflection Standard Materials,” Lighting Research and Technology, Vol. 15, pp. 133–149.

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