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Microscope accessory plates and colour blindness

Published online by Cambridge University Press:  14 March 2018

F. E. Tocher
F. E. Tocher*
Affiliation:
Department of Geology and Mineralogy, University of Aberdeen
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Summary

The ordinary quartz wedge is adapted for use by the colour blind by the superposition of a two-colour isotropic auxiliary plate. A birefringent plate of suitable retardation may also be used in conjunction with the same auxiliary plate to replace the standard sensitive tint plate. In both cases, diagnostic colour changes are replaced by relative intensity changes.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 266 , September 1964 , pp. 1002 - 1007
Copyright
Copyright © 1964, The Mineralogical Society

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