4.6 Article

Improved Wavelength Calibration by Modeling the Spectrometer

期刊

APPLIED SPECTROSCOPY
卷 76, 期 11, 页码 1283-1299

出版社

SAGE PUBLICATIONS INC
DOI: 10.1177/00037028221111796

关键词

Wavelength calibration; Czerny-Turner spectrograph; transmission spectrometer; reference lamp

资金

  1. Science Foundation Ireland [15/CDA/3667, 19/FFP/7025]
  2. Science Foundation Ireland (SFI) [15/CDA/3667] Funding Source: Science Foundation Ireland (SFI)

向作者/读者索取更多资源

This paper introduces a new wavelength calibration routine that can quickly and accurately calibrate spectrometers. For spectral bands outside the range of the reference lamp's spectral lines, the method provides higher accuracy compared to third and second order fitting.
Wavelength calibration is a necessary first step for a range of applications in spectroscopy. The relationship between wavelength and pixel position on the array detector is approximately governed by a low-order polynomial and traditional wavelength calibration involves first-, second-, and third-order polynomial fitting to the pixel positions of spectral lines from a well known reference lamp such as neon. However, these methods lose accuracy for bands outside of the outermost spectral line in the reference spectrum. We propose a fast and robust wavelength calibration routine based on modeling the optical system that is the spectrometer. For spectral bands within the range of spectral lines of the lamp, we report similar accuracy to second- and third-order fitting. For bands that lie outside of the range of spectral lines, we report an accuracy 12-121 times greater than that of third-order fitting and 2.5-6 times more accurate than second-order fitting. The algorithm is developed for both reflection and transmission spectrometers and tested for both cases. Compared with similar algorithms in the literature that use the physical model of the spectrometer, we search over more physical parameters in shorter time, and obtain superior accuracy. A secondary contribution in this paper is the introduction of new evaluation methods for wavelength accuracy that are superior to traditional evaluation.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据