A New Photoelectric Fabry-perot Spectrometer for Low Light Intensities


In order to increase the signal to noise ratio of a Fabry-Perot spectrometer the following method was used to detect the photoelectric signals. The pressure in a Fabry-Perot interferometer was increased and lowered periodically with a period of about one minute thereby running through one order of the interferometer many times in opposite directions. For… (More)

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