Abstract
IT has been established that multiple-beam fringes of equal chromatic order are particularly sensitive for the evaluation of small surface angles. Yet they suffer from a disadvantage in that the angle shown by the fringes depends upon the orientation of the surface relative to the spectrograph slit. In fact, a resolved component of any surface angle appears, and in general it is necessary to rotate the surface under observation to find the maximum corresponding to the true surface angle.
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BARAKAT, N. Measurement of Small Surface Angles. Nature 163, 603 (1949). https://doi.org/10.1038/163603a0
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DOI: https://doi.org/10.1038/163603a0
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