Interference technique and apparatus for spectrum analysis
Abstract
Abstract 4. SPECTRUM ANALYSIS APPARATUS COMPRISING: AN OPTICAL INTERFERMETER INCLUDING A RECIPROCABLE MIRROR AND HAVING A LIGHT EXIT PATH, MEANS FOR RECIPROCATING SAID MIRROR WITH AN EXCURSION EXCEEDING THE LONGEST WAVELENGTH OF THE LIGHT IN SAID EXIT PATH AND WITH A SUBSTANTIALLY CONSTAND VELOCITY OVER (AN APPRECIABLE) A MAJOR PORTION OF EACH RECIPROCATING CYCLE, PHOTECLECTRIC PICK-UP MEANS LOCATED IN THE LIGHT EXIT PATH OF SAID INTERFORMER FOR GENERATING A SIGNAL PROPORTIONAL TO THE OUT PUT IN SAID EXIT PATH, AND ELECTRONIC FREQUENCY ANALYZER MEANS COUPLED TO AND SUPPLIED WITH SAID SIGNAL, FOR MEASURING THE AMPLITUDES OF THE VARIOUS COMPONENT FREQUENCIES MAKING UP TO THE OUTPUT SIGNAL FROM SAID PHOTOELECTRIC PICKUP MEANS. WHEREBY THE DISTRIBUTION OF THE AMPLITUDE OF THE SIGNAL AMONG ITS VARIOUS FREQUENCY COMPONENTS INDICATES THE DISTRIBUTION OF THE OPTICAL ENERGY OF THE GIVEN LIGHT SOURCE AMONG THE VARIOUS CORRESPONDING WAVELENGTHS.
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