探测几何反射光谱测量系统设计

Design of Reflectance Spectra Measuring System under Detection Geometry

地物反射光谱是地面遥感的基础,现有的测量装置多基于复杂的机械传动平台与控制系统,整体结构庞大笨重、成本较高、便携性差。为解决上述问题,该文设计了一种探测几何反射光谱测量系统,该系统主要由探测几何支架、光谱采集系统、卤钨聚光光源、载物台四个部分组成,探测几何支架采用模块化设计,通过各组成模块的灵活装配定位,可实现较大的角度、距离探测几何范围,该系统采用一分多光纤,可实现较大的光谱波段覆盖范围。通过对该系统的试制与调试,以及地物样品光谱采集测试实验,验证了其探测几何及波段范围。该系统结构简单、互换性好、安装携带方便、实用性较强、满足室内与野外使用需求的特点。

Reflectance spectra of ground objects are the foundation of ground remote sensing.In order to detect reflectance spectra of ground objects from various angles,the existing measuring devices are mostly based on complex mechanical transmission platforms and control systems.However,these devices are bulky,costly,and lack of portability.To solve above problems,a reflectance spectra measuring system under detection geometry is designed in this paper.This system consists of four parts:detection geometry bracket,spectra acquisition system,halogen tungsten spotlight,and object stage.Wide range of detection geometry of angle and distance can be achieved by flexible assembling and positioning of main component modules in the detection geometry bracket which adopted modular design;and wide spectral band coverage can be achieved by a one-to-multiple optical fiber adopted by the spectra acquisition system.After trial production and debugging of the system,detection geometry and band range of the system is verified through experiments of reflectance spectra acquisition and test of ground objects.The reflectance spectra measuring system is simple in structure,good in interchangeability,easy to install and carry,and can meet indoor and outdoor needs with strong practicability.