Abstract
Gaydon and Minkoff1 have described a Christiansen filter designed to isolate the 2537 A. resonance line of mercury. We have been working for some time upon the general problem of the design of Christiansen filters for the isolation of various spark and discharge tube lines to be used in ultra-violet microscopy. We have amplified the work of Kohn and von Fragstein2, and developed a series of filters employing benzene—alcohol mixtures with fused quartz chips, which can span the region 3000–4000 A.
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References
Gaydon and Minkoff, Nature, 158, 788 (1946).
Kohn, and von Fragstein, Phys. Z., 33, 929 (1932).
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SINSHEIMER, R., LOOFBOUROW, J. Christiansen Filters for the Ultra-Violet. Nature 160, 674–675 (1947). https://doi.org/10.1038/160674b0
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DOI: https://doi.org/10.1038/160674b0
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