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Calibration of the degree of linear polarization measurement of polarized radiometer using solar light

机译:用太阳光校准偏振辐射计的线性偏振度

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摘要

We establish a polarimetric reference for the degree of linear polarization (DOLP) measurement calibration, based on direct and reflected solar light, with a theoretical error of about 0.0012. This calibration source can be used to calibrate polarized radiometers instead of complex laboratory devices and can respond from UV to near infrared wavelengths. A two-step method for calibrating the DOLP measurement is proposed and applied to a ground-based polarized radiometer. The first step is correcting the transmittance difference between polarizer units using the direct solar beam, while the second step corrects possible bias in DOLP measurement using the reflected solar light as a reference. Based on instrument characterization, calibration results obtained with the new polarized sun-sky radiometer, CE-318-DP, are discussed and compared with laboratory results.
机译:我们基于直接和反射的太阳光,为线性偏振度(DOLP)测量校准建立了一个偏振参考,其理论误差约为0.0012。该校准源可用于校准偏振辐射计,而不是复杂的实验室设备,并且可响应紫外线至近红外波长。提出了一种用于校准DOLP测量的两步方法,并将其应用于基于地面的极化辐射计。第一步是使用直接太阳光束校正偏振器单元之间的透射率差异,而第二步是使用反射的太阳光作为参考来校正DOLP测量中可能的偏差。基于仪器的特性,讨论了使用新型偏光太阳辐射计CE-318-DP获得的校准结果,并将其与实验室结果进行了比较。

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