光谱可调谐式高分辨率光学载荷校准技术

Calibration technology for high-resolution optical load by spectrally tunable source

基于对高分辨率光学载荷测试设备开展现场计量和校准的迫切需求,建立一套光谱可调谐式高分辨率光学载荷校准装置,该装置中光谱可调谐光源可以发出300~800 nm范围内任意光谱分布的光能,再通过空间调制系统形成无穷远处的具有特定光谱分布的清晰目标,实现高分辨率光学载荷光谱参数校准、辐射参数校准和成像性能参数校准。校准装置的光谱辐亮度校准范围为6.54×10^(-4)~3.14×10^(-1)W·sr·m^(-2)·nm^(-1),空间分辨率校准精度为0.059 mrad,视场角校准范围为1°3′30″,光谱辐亮度响应非均匀性校准精度为0.39%。主要介绍了校准装置的基本原理、结构组成等,并给出了详细的测试结果。由此可见,该光学载荷校准装置具有光谱任意调制、可拓展性强、高分辨率的优点。

Based on the urgent need of calibration on high-resolution optical load, a series of calibration device for high-resolution optical load by spectrally tunable source were designed. The spectrally tunable source can produce any spectral display light from 300-800 nm, which is turned by spatial modulation and being at infinity, clear target. Spectrum parameter, radiation parameter, imaging performance parameter can be calibrated by the device. The calibration device＇s spectral radiance ranges from 6.54×10^（-4）～3.14×10^（-1）W·sr·m^（-2）·nm^（-1）. The calibration device＇s spatial resolution accuracy is 0.059 mrad. The calibration device＇s field of view ranges from 0to 1°3′30″. The spectral radiance response non- uniformity is 0.39%. The basic principle, system design of the calibration device and detailed test results were introduced . Thus, the calibration device for the optical load has the advantages of arbitary spectrum modulation, scalable, high resolution.