Abstract
THE Fabry–Perot interferometer can be used for examining absorption spectra provided that there is no overlapping between successive orders of interference. This means that the range between orders must be equal to, or greater than, the spectral slit-width of the primary monochromator1. Suppose that, using a given interferometer, it is possible to resolve a fraction ▵m of a fringe order, then under the above condition the resolving power of the combination of interferometer and primary monochromator is more than 1/▵m times that of the latter alone.
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References
Meissner, K. W., J. Opt. Soc. Amer., 32, 185 (1942).
Meyer, C. F., and Levin, A. A., Phys. Rev., 34, 44 (1929).
Barnes, R. B., and Czerny, M., Phys. Rev., 38, 338 (1931).
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JAFFE, J. An Interference Spectrometer for the Infra-Red. Nature 168, 381–382 (1951). https://doi.org/10.1038/168381a0
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DOI: https://doi.org/10.1038/168381a0
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