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针对海洋光谱成像技术对于宽视场(FOV)、大幅宽、高通量的需求,提出了一种基于像平面干涉技术的新型宽视场干涉光谱成像仪,研究了像平面干涉技术的原理,提出了相应的干涉方案并推导了系统的光程差公式,制定了详细的参数指标并根据相应参数设计优化了光学系统。光学系统前置镜和中继镜分别采用双高斯和Dyson结构,视场为35.5o,幅宽为320 km,系统F数为4,焦距为100 mm,在400~900 nm的谱段范围内,平均信噪比(SNR)大于100,在奈奎斯特空间频率为32 lp/mm处,调制传递函数(MTF)大于0.5,各项指标满足要求。
Aiming at the demand of wide field of view (FOV), large width and high flux of ocean spectral imaging technology, a new wide field of view interferometric spectral imager based on image plane interference technique is proposed. The principle of image plane interference technique is studied, The corresponding interference scheme is proposed and the optical path difference formula of the system is deduced. The detailed parameter index is formulated and the optical system is optimized according to the corresponding parameter design. The optical system front mirror and the relay mirror respectively adopt double Gaussian and Dyson structures with a field of view of 35.5 °, a width of 320 km, a system F number of 4 and a focal length of 100 mm in a spectral range of 400-900 nm , The average signal-to-noise ratio (SNR) is greater than 100, and the modulation transfer function (MTF) is greater than 0.5 at a Nyquist space frequency of 32 lp / mm. All the indexes meet the requirements.