Josef pep schock

Abstract

Abstract 1. IN A SPECTROMETER HAVING AN ENTRANCE SLIT, MEANS FOR DISPERSING LIGHT PASSING THROUGH THE ENTRANCE SLIT TO RESOLVE THE CHARACTERISTIC SPECTRA OF A PARTICULAR SUBSTANCE WHEN THE CHARACTERISTIC SPECTRA ARE PRESENT IN THE LIGHT, THE DISPERSING MEANS INCLUDING FOUCSSING MEANS MEANS FOR PRODUCING A SET OF IMAGES OF THE ENTRACE SLIT CORRESPONDING TO SAID CHARACTERISTIC SPECTRA, THE SLIT IMAGES BEING DISPERSED IN A GIVEN DIRECTION OF DISPERSION AND BEING FORMED IN A FOCAL PLANE, MASK MEANS HAVING A PLURALITY OF RELATIVELY OPAQUE AND TRANSPARENT REGIONS, SAID REGIONS BEING CORRELATIVE WITH THE SET OF SLIT IMAGES CORRESPONDING TO THE CHARACTERISTIC SPECTRA OF A PARTICULAR SUBSTANCE, THE MASK MEANS BEING LOCATED IN SAID FACAL PLANE, AND A PHOTODETECTOR POSITIONED FOR RECEIVING LIGHT WHICH HAS PASSED THROUGH THE MASK MEANS, THE PHOTODETECTOR PRODUCING AN OUTPUT SIGNAL PROPORTIONAL TO THE INTENSITY OF THE LIGHT SHINING UPON, IT THE IMPROVEMENT COMPRISING: (A) MEANS FOR CYCLICALLY VARYING THE RELATIVE POSITIONS OF THE SLIT IMAGES AND THE MASK MEANS AT A RAPID AND CONSTANT RATE OF REPETITION BETWEEN A FIRST POSITION WHEREIN THE SLIT IMAGES CORRELATE WITH SAID REGIONS OF THE MASK MEANS AND A SECOND POSITION WHEREIN THERE IS A SLIGHT RELATIVE DISPLACEMENT, IN THE SAID DIRECTION OF DISPERSION, BETWEEN THE SLIT IMAGES AND CORRESPONDING CORRELATIVE REGIONS OF THE MAKS MEANS, WHEREBY THE INTENSITY OF THE LIGHT PASSING THROUGH THE MASK MEANS IN CYCLICALLY VARIED FROM A MAXIMUM IN SAID FIRST POSITION TO A MINIMUM IN SAID SECOND POSITION IN RESPONSE TO THE VARYING RELATIVE POSITIONS OF THE SLIT IMAGES AND THE MASK MEANS WHEN THE CHARACTERISTIC SPECTRA ARE PRESENT IN THE LIGHT, SO THAT SAID OUTPUT SIGNAL OF SAID PHOTODECTOR IS THEREBY MODULATED BY AN ALTERNATING CURRENT SIGNAL ATTRIBUTABLE TO THE EXISTENCE OF THE SAID CHARACTERISTIC SPECTRA IN THE LIGHT, (B) MEANS COUPLED TO THE PHOTODECTRO FOR AMPLIFYING THE SAID ALTERNATING CURRENT SIGNAL SEPARATELY FROM OTHER COMPONENTS OF THE SAID OUTPUT SIGNAL, AND (C) MEANS COUPLED TO SAID AMPLIFYING MEANS FOR MEASURING THE LEVEL OF THE AMPLIFIED ALTERNATING CURRENT SIGNAL INDEPENDENTLY OF OTHER COMPONENTS IN THE OUTPUT SIGNAL.

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