Back to Search Start Over

Robust Full-Screen Wavelength Calibration Algorithm

Authors :
Baisong Jiang
Chunxia Zhang
Nanqi Zhao
Hongguang Li
Liang Yuan
Juan Chen
Haowen Bai
Le Wang
Source :
Applied Sciences, Vol 13, Iss 2, p 1100 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

In spectrometer measurement, it is very important to accurately calibrate the wavelength of all target characteristic spectra. Although wavelength calibration methods have long been investigated, no techniques have been designed for the scanning, double-layer, secondary diffraction, linear-array CCD spectrometer, to the best of our knowledge. Based on the grating diffraction equation and experimental results, a mathematical model of wavelength calibration was established for the scanning, double-layer, secondary diffraction, linear-array CCD spectrometer. In this study, a robust, full-screen, wavelength calibration algorithm is proposed, based on the related working principle and the requirements of both accuracy and robustness. The detailed steps are as follows. First, we established a wavelength calibration model at central pixels, following the grating diffraction equation. Then, according to the relationship between the difference in pixels and the feedback values of the grating ruler, a model was established to show the association between these factors. Finally, we combined the two models and built a full-screen wavelength calibration model. We theoretically and experimentally demonstrate that the proposed calibration algorithm is an excellent calibration tool, which can conveniently and accurately calibrate the wavelengths of central and non-central pixels at the same time.

Details

Language :
English
ISSN :
20763417
Volume :
13
Issue :
2
Database :
Directory of Open Access Journals
Journal :
Applied Sciences
Publication Type :
Academic Journal
Accession number :
edsdoj.404ef3bdb07547faadd02f34fc048b2e
Document Type :
article
Full Text :
https://doi.org/10.3390/app13021100