METHOD FOR LIGHTING ENTRANCE SLIT OPTICAL SPECTROMETER Russian patent published in 2001 - IPC

FIELD: optical spectroscopy. SUBSTANCE: the method consists in projection of the image of the cord of the arc-discharge source on the plane of the entrance slit of the spectrometer. The spectrometer entrance slit is positioned perpendicularly to the direction of the cord of the arc-discharge source in the area of the arc or spark discharge, the length of the analyzed section of the entrance slit is selected to be not less than the dimension of the area of radiation of the arc-discharge source that is unstable in space, and its width-not more than the dimension of the area of radiation of the arc-discharge source that is unstable in space. The entrance slit installed for parallel movement along the discharge cord. EFFECT: enhanced repetition of values of signal amplitude at measurement of similarly prepared samples, and enhanced accuracy of measurement results. 2 cl, 2 dwg