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A new method for the absolute measurement of reflectivity

Published online by Cambridge University Press:  14 March 2018

P. M. D. Bradshaw ,
R. Phillips  and
R. A. Smith
P. M. D. Bradshaw
Affiliation:
Department of Geology, University of Durham
R. Phillips
Affiliation:
Department of Geology, University of Durham
R. A. Smith
Affiliation:
Department of Geology, University of Durham
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Summary

The theory of a new method for the determination of reflectivity at truly normal incidence is described. A parallel light beam falls on the specimen after passing through a glass cube with semi-silvered diagonal mounted at the centre of an optical goniometer. The various reflected beams are measured by a photomultiplier fixed to the telescope of the goniometer. Experiment has proved the validity of the method and the spectral reflectivity of pyrite in air and in oil has been investigated.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 274 , June 1966 , pp. 861 - 866
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1966

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References

Hallimond, (A. F.), 1957. Min. Mag., vol. 31, pp. 487–494.Google Scholar
Nichol, (I.), 1962. Ph.D. thesis, University of Durham.Google Scholar
Nichol, (I.) and Phillips, (R.), 1965. Min. Mag., vol. 35, pp. 200–213.Google Scholar
Phillips, (R.) and Bradshaw, (P. M. D.), 1966. Ibid., pp. 756–758.CrossRefGoogle Scholar