Total Reflection Filter
JAN 01, 1950
DOI: 10.1063/1.3066757
Until recently prisms or gratings were customarily used for isolating a narrow band of wavelengths, but during the last few years a series of interference filters have been developed, the commonest of which is analogous to the Fabry‐Perot interferometer and consists of a layer of dielectric about one wavelength thick, sandwiched between two layers of silver.
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© 1950 American Institute of Physics
