Abstract
THE compensation method of obtaining the birefringence of an object seen in a polarizing microscope requires the evaluation of the optical path-difference produced by a known thickness. In elongated objects of irregular cross-sectional shape, for example, silk and viscose rayon filaments and fibres or filaments containing cavities, the thickness at a given point of compensation within the object cannot readily be determined1,2. The purpose of this communication is to describe a technique that has overcome this difficulty.
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References
Frey-Wyssling, A., “Submicroscopic Morphology of Protoplasm”, 334, English edit. (Elsevier, 1955).
Heyn, A. N. J., “Fibre Microscopy”, 335 (Interscience Pub. Inc., New York, 1954).
Hough, J. M., and Goldsmith, B. J., Nature, 172, 1105 (1953).
Brown, D. S., Nature, 173, 443 (1954).
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SIMMENS, S. Birefringence Determination in Objects of Irregular Cross-sectional Shape and Constant Weight per Unit Length. Nature 181, 1260–1261 (1958). https://doi.org/10.1038/1811260b0
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DOI: https://doi.org/10.1038/1811260b0
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