Abstract
IN a recent communication in Nature, A. Walsh1 suggested a means of improving the performance of a commercial infra-red spectrometer by adding extra plane mirrors so that the radiation traverses the prism four times instead of twice, and then chopping the partly dispersed radiation so that only the wanted radiation is interrupted and consequently measured. The advantages claimed are that the instrument is in effect converted into a double-monochromator with improved resolution and complete freedom from stray light even at 15 μ.
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References
Walsh, A., Nature, 167, 810 (1951).
Perkin-Elmer Instrument News, 1, No. 4, 3 (1950).
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ROCHESTER, J., MARTIN, A. Improving the Performance of a Littrow-type Infra-Red Spectrometer. Nature 168, 785–786 (1951). https://doi.org/10.1038/168785a0
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DOI: https://doi.org/10.1038/168785a0
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