中阶梯光栅光谱仪波段范围校正装置

Calibration devices for band range of echelle spectrometer

为了保证中阶梯光栅光谱仪能够具有足够的波段范围,设计了一套校正装置,对该校正装置的校正原理、波段校正范围、校正分辨率等问题进行了讨论和研究。首先,对中阶梯光栅光谱仪的光学元件进行了公差分析,并介绍了自动光谱校正的原理和流程。选定聚焦镜作为调整环节并根据CCD接收器像面的利用情况给出了调整分辨率要求,然后设计了校正装置,并对校正装置的分辨率进行了理论计算。最后,对校正装置的校正效果进行了实验验证。实验结果表明:校正装置在方位方向的校正分辨率可达0.006 25°、俯仰方向的分辨率可达0.006 25°、前后方向的分辨率可达0.005mm。校正装置可以将10像素的波段偏移调整回CCD正常接收范围内,从而保证光谱仪器的全谱段波段范围。

In order to ensure full waveband range of echelle spectrometers,a set of calibration devices was designed.The principle,range and resolution of the calibration were discussed and studied.First,tolerance analysis of optical elements in the echelle spectrometer was performed,and the principle and process of auto spectrum calibration were introduced.Taking the focusing mirror as the adjusting object,the requirement of adjusting resolution was given according to the usage of the CCD image.Furthermore,a set of calibration device was designed,and the calibration resolution of the devices was calculated and experimentally verified.The results show that the azimuth calibration resolution is up to 0.006 25°,the resolution of the pitching direction is up to 0.006 25°and the resolution of the front and rear direction is up to 0.005 mm.The calibration devices can adjust the 10 pixels band offset to the normal reception range of the CCD,thus ensuring the full spectral band range of the spectrometer.