Calibration method for ensuring consistency of spectrum modules

Abstract

The invention discloses a calibration method for ensuring the consistency of a spectrum module. The calibration method comprises the following steps that step 1, lasers with three wavelengths of 803nm, 830nm and 976nm are selected to calibrate the spectrum module, namely a monochromator; 2, laser of lasers with the three wavelengths of 803 nm, 830 nm and 976 nm is combined into one beam through athree-in-one beam combiner, and the combined laser is preprocessed; 3, in the working process, the preprocessed light is directly connected to a slit of a spectrum module through an optical fiber, three peaks are formed on a detector after the three beams of light are split by the spectrum module, when the spectrum module is detected, horizontal coordinates of the three peaks in a spectrogram areobserved, calibration is conducted according to the horizontal coordinates of the three peaks, and meanwhile the consistency of the spectrum module can be judged; and meanwhile, whether the resolutionof the spectrum module is qualified or not is judged by taking the full width at half maximum of the peak with the wavelength of 830nm as the actually measured resolution. The method can improve theconsistency of the spectrum module.

Description

technical field [0001] The invention belongs to the field of radiation detection applications, in particular to a calibration method for ensuring the consistency of spectrum modules. Background technique [0002] Light waves are electromagnetic radiation produced by electrons in the motion of atoms. The movement of electrons inside the atoms of various substances is different, so the light waves they emit are also different. The study of the luminescence and absorption of light by different substances has important theoretical and practical significance, and has become a specialized subject-spectroscopy. The infrared absorption spectrum of molecules is generally used to study the vibrational and rotational spectra of molecules, and molecular vibrational spectroscopy has always been the main research topic. [0003] The traditional spectral calibration methods mainly use the monochromator wavelength scanning method and the characteristic spectrum calibration method. The mo...

AI Technical Summary

Problems solved by technology

The monochromator wavelength scanning method can obtain the central wavelength and spectral resolution of each spectral channel of the hyperspectral camera, and has the advantages of full-band calibration and wide application range. The spectral resolution calibration accuracy is low, and it is impossible to accurately calibrate the hyperspectral camera; the characteristic spectrum calibration method mostly uses the emission lines of mercury lamps, sodium lamps, tungsten lamps and other standard lamps to calibrate the instrument, which has the advantages of simple structure and easy operation , but the calibration of the center wavelength of the full band of the hyperspectral camera and the calibration of the corresponding spectral resolution cannot be realized, and the scope of application is narrow

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