Method and apparatus for measuring the frequency of radiation
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United States of America Patent
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-
Dec 29, 1981
Grant Date -
N/A
app pub date -
Nov 19, 1979
filing date -
Nov 19, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for measuring the frequency of radiation is described comprising a pair of filters (2,3) or a beam splitter (30) responsive to radiation from a source of radiation (4) for providing a first output having a magnitude which increases and a second output having a magnitude which decreases with an increase in the frequency of said radiation, a divider (11) for providing a ratio of the magnitudes of said first and second outputs and a comparator (14) and memory (17) responsive to the ratio from said divider (11) for providing an output corresponding to the frequency of said radiation.
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