发光学报, 2013, 34 (6): 807, 网络出版: 2013-06-14  

用于农田土壤监测的高光谱成像仪

Hyperspectral Imager for Farmland Soil Monitoring
作者单位
1 长春理工大学, 吉林 长春130022
2 中国科学院 长春光学精密机械与物理研究所, 吉林 长春130033
摘要
土壤光谱分析技术具有分析速度快、成本低、无危险、无破坏、可同时反演多种成分等特点, 基于高光谱成像技术可以快速获取土壤性质及其空间分布特征。本文针对农田土壤监测的需求, 设计了一种无人机载高光谱成像仪, 选择Offner凸光栅光谱成像系统实现了无谱线弯曲和无色畸变的设计结果。400~1 000 nm波长范围内的衍射效率为15%~30%, 对地成像效果清晰, 在3 km飞行高度可以获得覆盖宽度为0.6 km、地面分辨率为0.6 m的地物目标高光谱图像, 可提供0.4~1.0 μm波长范围内120个谱段的高光谱图像, 光谱数据准确、稳定。结果表明, 该高光谱成像仪满足设计要求且可以快速获得高精度成像光谱信息, 适合用于对农田土壤的监测。
Abstract
Soil spectral analysis technology has features of fast analysis speed, low cost, no risk, no damage, and it can inverse a variety of ingredients at the same time. Based on hyper-spectral imaging technology, we can quickly obtain soil properties and its spatial distribution characteristics. In this paper, we design a UAV hyper-spectral imager based on the demand of farmland soil monitoring. The Offner convex grating spectral imaging system was selected to achieve non-spectral line bending and colorless distortion design results. The diffraction efficiency is 15%~30% in the range of 400~1 000 nm wavelength. The ground imaging results are clear, it can obtain hyper-spectral images of ground target of covering a width of 0.6 km and ground resolution of 0.6 m at 3 km altitude. It provides 120 spectral bands of hyper-spectral images at the wavelength range of 0.4~1.0 μm. The spectral data are accurate and stable. The results show that this hyper-spectral imager meets the design requirements and can quickly obtain the high-precision imaging spectra of the agricultural soils, thus achieving the monitoring of farmland soil.

金辉, 姜会林, 郑玉权, 张晓辉, 崔继承. 用于农田土壤监测的高光谱成像仪[J]. 发光学报, 2013, 34(6): 807. JIN Hui, JIANG Hui-lin, ZHENG Yu-quan, ZHANG Xiao-hui, CUI Ji-cheng. Hyperspectral Imager for Farmland Soil Monitoring[J]. Chinese Journal of Luminescence, 2013, 34(6): 807.

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