Voigt filter
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United States of America Patent
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Mar 24, 1998
Grant Date -
N/A
app pub date -
Aug 27, 1992
filing date -
Aug 27, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Voigt optical filter. Crossed polarizers are provided at the entrance and exit of a vapor cell continuing an alkali metal vapor. A magnet provides a magnetic field at 90.degree. with the axis of the cell and 45.degree. with each polarizer direction. The only light which passes through the filter is light within a narrow frequency band near the atomic transitions (absorption peaks) of the alkali metal vapor.
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