Abstract

A narrowband optical vapor filter based on the principle of selective specular reflection from vapors is described. The device consists of a mercury vapor cell with Brewster angle windows that selectively reflects the 2537-Å line and transmits other radiation. The bandwidth of the device varies from 0.1 Å to 1.0 Å as a function of the mercury vapor pressure. Its signal-to-skirt rejection ratio at an acceptance angle of 7° is 28 dB, and its acceptance area is 1 cm². It is used to perform a spectrochemical analysis of mercury in water and also to take a monochromatic photograph of the spatial distribution of excited mercury atoms in a flame.

© 1975 Optical Society of America

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