Light-splitting dispersion device for inductively-coupled plasma emission spectrometer

Abstract

The invention discloses a light-splitting dispersion device for an inductively-coupled plasma emission spectrometer. The light-splitting dispersion device comprises a converging lens, a beam splittermirror and gratings in the light path propagation direction. The beam splitter mirror is a semi-reflecting and semi-transmitting prism. The number of the gratings is two, and the gratings are a flat field grating and a plane grating respectively. After optical signals emitted by a light source are focused by the converging lens, the light is divided into two beams through the semi-reflecting and semi-transmitting prism, wherein the two beams are transmission light and reflection light respectively, the transmission light being dispersed and split by the flat field grating, and the reflection light being dispersed and split by the plane grating.

Description

technical field [0001] The invention relates to a spectroscopic dispersion device for an inductively coupled plasma emission spectrometer. Background technique [0002] At present, the inductively coupled plasma emission spectrometer adopts spectroscopic systems including Paschen-Runge optical path, Czerny-Turner optical path and echelle optical path. Paschen-Runge optical path usually uses photomultiplier tubes as detectors. The disadvantage is that it is less flexible and inconvenient to add Element channel, the number of measured elements is limited. The disadvantage of the Czerny-Turner optical path is that the motor drives the grating to rotate to realize the wavelength scanning analysis, which involves a transmission mechanism, so the stability is poor. In addition, the wavelength coverage is narrow. The disadvantage of the echelle optical path is that the optical path is complex and the spectrum analysis is difficult. The spectroscopic system needs to use an echelle ...

AI Technical Summary

Problems solved by technology

[0002] At present, the inductively coupled plasma emission spectrometer adopts spectroscopic systems including Paschen-Runge optical path, Czerny-Turner optical path and echelle optical path. Paschen-Runge optical path usually uses photomultiplier tubes as detectors. The disadvantage is that it is less flexible and inconvenient to add The channel of the element, the number of determined elements is limited

The disadvantage of the Czerny-Turner optical path is that the motor drives the grating to rotate to achieve wavelength scanning analysis, which involves a transmission mechanism, so the stability is poor. In addition, the wavelength coverage is narrow

The disadvantage of the echelle optical path is that the optical path is complex and the spectrum analysis is difficult. The spectroscopic system needs to use an echelle grating and an area array CCD, so the manufacturing cost of the instrument is very high

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