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设计了一个应用于成像光谱仪的望远系统,针对成像光谱仪的特点,由前置望远镜及后置光谱仪组成。前置望远系统的参数以及成像质量对整个成像光谱仪应用显得非常重要。设计了一个谱段范围1～2.5μm、视场为28.1°×0.3°、相对口径为1/4、焦距长度为60 mm的望远系统。系统在谱段1～2.5μm宽谱段范围内通过玻璃的匹配校正了色差及二级光谱,畸变控制在0.2%以内,很好地保证了与后续光谱仪的对接,此设计可用于航空领域进行大视场、高分辨率成像。
A telescopic system for imaging spectrometer was designed. It was composed of front telescope and rear spectrometer according to the characteristics of imaging spectrometer. The parameters of the telephoto system as well as the imaging quality are of great importance to the entire imaging spectrometer application. A telephoto system with a spectral range of 1-2.5 μm, a field of view of 28.1 ° × 0.3 °, a relative aperture of 1/4 and a focal length of 60 mm was designed. The system calibrates the color difference and the secondary spectrum through the matching of glass in the range of 1 ~ 2.5μm in the spectral range, and the distortion is controlled within 0.2%, which ensures the docking with the subsequent spectrometer. This design can be used in the aviation field Large field of view, high-resolution imaging.