一种用于2～14μm红外光谱辐射计的波长标定方法

A Wavelength Calibration Method for 2～14 μm Infrared Spectroradiometer

针对所研制的基于渐变滤光片的高分辨率宽波段红外光谱辐射计,提出了一种波长标定方法。首先,由理论推导给出初始波长,并对所用渐变滤光片的非线性进行校正。然后采用基于波长基准源的特征峰匹配法进行波长校正,进而完成波长标定。最后使用激光器对标定精度进行校验。结果表明,本文方法的标定精度优于1%。

For a high resolution wide waveband infrared spectroradiometer based on linear variable filters, a wavelength calibration method is proposed. Firstly, the initial wavelength is derived theoretically and the linearity of the linear variable filter used is corrected. Then, the wavelength correction is carried out by the characteristic peak matching based on wavelength reference source so as to complete wavelength calibration. Finally, the calibration accuracy is checked by using a laser. The result shows that the calibration accuracy of the proposed method is better than 1%.