Abstract
A system is described for digitally scanning a Fabry-Perot interferometer by changing the pressure of the gas in the interferometer chamber by small discrete steps. The system, intended for recording weak signals, i.e., of the order of a few counts per second, is very linear. Repetitive scans are reproduced within of the spectral free range of the interferometer. An example of the depolarized Rayleigh line scattered by H2 at 2.5 amagat is given.
© 1972 Optical Society of America
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