近红外无热化高光谱成像系统优化设计

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中图分类号：TN202文献标志码：A

Abstract： A near-infrared athermalized hyperspectral imaging system was designed and optimized， which was capable of non-contact measurement of infrared spectral information. The optical system consists of a front double Gaussian lens，a microlens array，a beam spliter，and an infrared detector for detecting near-infrared optical radiation from 750nm to 1050nm .The designed microlens array can substantially improve the imaging quality of the weak light， and the beam spliter system improves the detector's sensitivity to a specific wavelength range of the nearinfrared. The ZEMAX simulation showed that the total length of the front optical system was 12mm at a spatial frequency 80lp/mm ， and the MTF （modulation transfer function） of each wavelength was greater than 0.6. The imaging quality was good because the image quality was almost unchanged in the temperature range from -20°C to 50∘C . The tolerance analysis yielded that more than 90% of the samples agreed with the design specifications，which was of good practicability.

Keywords： athermalized; non-contact detection; near-infrared; microlens arrays； hyperspectral image

近年来，随着农业科技的迅速发展，高光谱遥感技术在农业领域的应用逐渐受到关注。（剩余7476字）