Abstract
IN the measurement of stresses in glass using polarized light, it is usual to employ some form of compensator in which the amount of birefringence varies uniformly across the field of view and passes through zero value at the centre. This gives a series of parallel fringes when viewed suitably between crossed polarizer and analyser. With white light the central fringe is black, and serves as a useful index.
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J. Sci. Instr., 17, 227 (1940).
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JELLYMAN, P., MILNE, A. A Large Field Compensator for Measurement of Birefringence. Nature 161, 477 (1948). https://doi.org/10.1038/161477a0
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DOI: https://doi.org/10.1038/161477a0
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