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Birefringence Determination in Objects of Irregular Cross-sectional Shape and Constant Weight per Unit Length

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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

  1. Frey-Wyssling, A., “Submicroscopic Morphology of Protoplasm”, 334, English edit. (Elsevier, 1955).

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  2. Heyn, A. N. J., “Fibre Microscopy”, 335 (Interscience Pub. Inc., New York, 1954).

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  3. Hough, J. M., and Goldsmith, B. J., Nature, 172, 1105 (1953).

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  4. Brown, D. S., Nature, 173, 443 (1954).

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Authors and Affiliations

  1. British Cotton Industry Research Association, Shirley Institute, Didsbury, Manchester, 20

    S. C. SIMMENS

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  1. S. C. SIMMENS
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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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