Detection system for spectral resolution of Rowland grating spectrometer

Abstract

The invention provides a detection system for a spectral resolution of a Rowland grating spectrometer. A light beam emitted by a light source is incident into an incident slit through an optical fiber. By adjusting the width of the incident slit, the angle of the light beam incident into the incident slit is changed. A light beam passing through the incident slit is incident into the Rowland grating, and gathered into the detector after splitting through the Rowland grating. By fine tuning the length and angle of an exit spiral arm, the spectral energy received by the detector is strongest andthe waveform is symmetrical. And by calculating the separation for receiving the spectral through the computer, the spectral resolution of the Rowland grating spectrometer is obtained. The detectionsystem for the spectral resolution of Rowland grating spectrometer provided by the invention has the advantages of being good in stability, accurate in analysis result, low in operation cost, and highin flexibility. Therefore the accurate measurement of the spectral resolution of the Rowland grating spectrometer can be realized.

Description

technical field [0001] The invention relates to the field of spectrum technology, in particular to a detection system for the spectral resolution of a Roland grating spectrometer. Background technique [0002] Spectral resolution is one of the core indicators of spectroscopic instruments and an important benchmark for evaluating the performance of spectroscopic instruments. Spectral resolution is the minimum wavelength difference that a spectrometer can separate, and it depends on factors such as the resolving power of the grating, the effective focal length of the system, the slit width, and the optical aberration of the system. [0003] For the Roland grating spectrometer, because of its high etendue and simple optical structure, it is widely used in metallurgy, casting, machinery, metal processing and other fields. However, in the process of its development, due to the difference between the actual number of lines of the Rowland grating and the number of theoretical line...

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Problems solved by technology

However, in the process of its development, due to the difference between the actual number of lines of the Roland grating and the number of theoretical lines of the Roland grating, the deviation of the radius of curvature of the Roland grating, the width of the slit does not match the design value, the deviation of the incident angle and the exit angle, etc. impact, which may cause the actual spectral resolution to fail to meet the design index

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