System-level spectral responsivity calibration comparison and validation of supercontinuum laser and monochromator
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摘要: 细分光谱扫描定标技术是实现遥感器高精度光谱辐射定标的重要方式，基于超连续激光单色仪的定标装置是实现遥感器细分扫描定标的新选择。为验证所建立的超连续激光单色仪装置的系统级定标能力，利用硅辐亮度计和滤光片辐射计，分别采用超连续激光单色仪定标装置和可调谐激光定标装置对其进行了系统级绝对光谱响应度定标比对验证。实验结果表明：在所验证波段范围内，两种定标装置获得的硅辐亮度计绝对光谱响应度系统级定标结果最大偏差为0.6%。通道式滤光片辐射计的带内绝对光谱响应度定标结果最大偏差优于0.4%，带内积分响应度最大偏差约0.1%。文中的研究验证了超连续激光单色仪定标装置具有良好的系统级定标能力，能够获得较高的定标精度，在遥感器的绝对光谱响应度定标中具有重要应用前景。Abstract: The spectrally-resolved scanning calibration is an important technique to satisfy the high accuracy spectral radiometric calibration of remote sensors. The calibration facility based on supercontinuum laser and monochromator(SCM) is a new choice to realize spectrally-resolved scanning calibration of remote sensors. To verify the system-level calibration capability of the SCM, the spectral radiance responsivity of the silicon radiometer and filter radiometer were measured by using the calibration facility based on the supercontinuum laser monochromator and the tunable laser, respectively. The experimental results showed that the maximum deviation of the calibration results for silicon radiometer between supercontinuum laser monochromator and tunable laser was 0.6% within the validated band. And the maximum deviation of in-band absolute spectral responsivity calibration results of channel filter radiometer was better than 0.4%, and the maximum deviation of in-band integral responsivity was about 0.1%. The research in this paper verifies that the supercontinuum laser monochromator calibration facility has good system-level calibration capability, can obtain high calibration accuracy. It has important application prospects in the calibration of absolute spectral responsivity of remote sensors.
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Key words:
- supercontinuum laser /
- monochromator /
- spectral radiance /
- spectrally-resolved
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