Transmission-type prepositive optical path structure used for ICP spectrometer and having two-dimensional adjustable function

Abstract

The invention provides a transmission-type prepositive optical path structure used for an ICP spectrometer and having a two-dimensional adjustable function, belonging to the technical field of beam splitting systems for the ICP spectrometer. The transmission-type prepositive optical path structure comprises a front optical barrel, a lens fixing base, a sealing ring, an adjusting base, a thread sleeve, a screw, a back lens barrel, an adjusting ring, a spring, a lifting pin, a lock nut, a slip ring, a lens basic ring and a lens pressing ring. Through two-dimensional adjusting of a prepositive lens, changes of the value of detected signals received by a detector are monitored in real time; and when the signal of the detector reaches a maximum extent, it may be considered that the central hole of the lens and the center of an incident pin hole are of same height and are coaxial, and luminous flux of an echelle grating spectrometer is maximized at the time, so optimal analysis capability of the ICP spectrometer is guaranteed. Meanwhile, as six air vent holes are arranged in the adjusting ring, air in an optical chamber is discharged while argon is introduced into a beam splitting system, so absorption of ultraviolet bands by air is restricted, detection limits of ultraviolet bands are lowered, and the application scope of the ICP spectrometer is further broadened.

Description

technical field [0001] The invention belongs to the technical field of ICP spectrometer spectroscopic systems, and in particular provides a transmissive pre-light path structure with two-dimensional adjustable function applied to ICP spectrometers. Background technique [0002] Inductively coupled plasma spectrometer (ICP spectrometer) uses the information provided by atomic emission characteristic lines to analyze elements. It has the advantages of simultaneous, rapid and direct determination of multiple elements. It plays a huge role and is one of the most widely used elemental analysis methods in the field of materials. In the field of metallurgical analysis, such as steel, raw materials, and ferroalloys, it is required to measure dozens to hundreds of samples each time, and each sample needs to analyze Mn, Cu, Al, Cr, Si, P, Ni, Ti, V, Nb at the same time , Ca, Mg and other dozens of low-content elements, so the requirements for the spectral range, spectral resolution, ...

AI Technical Summary

Problems solved by technology

The existing front optical path mostly adopts the installation method of fixing the front lens. However, in the process of processing the mechanical parts of the fixed front lens and assembling the front lens, the deviation of the processing and assembly of the mechanical parts cannot be avoided. Ensure that the front lens and the center of the incident pinhole are coaxial at the same height, so it cannot ensure whether the system luminous flux is maximized, which will have a direct impact on the detection capability of the ICP spectrometer

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