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首页> 外文会议>Infrared spaceborne remote sensing and instrumentation XVI >Calibration of the spectral radiant power responsivity of windowed pyroelectric radiometers from 785 nm to 14 μm
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Calibration of the spectral radiant power responsivity of windowed pyroelectric radiometers from 785 nm to 14 μm

机译：窗式热电辐射计的光谱辐射功率响应率标定，范围为785 nm至14μm

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摘要

As part of the optical detector characterization program at the Optical Technology Division at NIST, we have established a capability for the calibration of spectral radiant power responsivity in the infrared from 785 nm to 14 μm. We have used our facilities to characterize two commercial pyroelectric radiometers with KRS5 windows. The calibration methodology consists of the determination of the responsivity at single wavelength tie points together with relative spectral responsivity measurements. Responsivity tie points at 785, 1064, 1320, 1600, 2000 and 10600 nm are obtained against the NIST ACR-L1 absolute cryogenic radiometer as well as a domed pyroelectric transfer standard, using an OPO tunable laser and a stabilized CO_2 laser as sources. The spatial variation of the responsivity of the test radiometers has also been measured. This enables us to minimize the uncertainties due to interference fringes from the KRS5 window. The relative spectral responsivity curves for the two radiometers are obtained indirectly through measurement of the detector absorptance with an FTIR-based integrating sphere reflectometer. In order to obtain the actual absorptance at the detector from the reflectance measurements, an individual KRS5 window and a bare detector were also measured. The results are compared and the uncertainty budgets will be discussed.
机译：作为NIST光学技术部光学探测器表征程序的一部分，我们已经建立了校准785 nm至14μm红外光谱辐射功率响应能力的功能。我们已经使用我们的设施来表征两个带有KRS5窗口的商用热释电辐射计。校准方法包括确定单波长连接点的响应度以及相关的光谱响应度。使用OPO可调激光器和稳定的CO_2激光器作为光源，针对NIST ACR-L1绝对低温辐射计以及圆顶热电传输标准，获得了785、1064、1320、1600、2000和10600 nm的响应性联系点。还测量了测试辐射计的响应度的空间变化。这使我们能够最小化来自KRS5窗口的干扰条纹带来的不确定性。通过使用基于FTIR的积分球反射仪测量探测器的吸收率，间接获得了两个辐射计的相对光谱响应度曲线。为了从反射率测量中获得检测器的实际吸收率，还测量了单个KRS5窗口和裸露的检测器。比较结果并讨论不确定性预算。

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