In order to satisfy the requirements of pre-launch laboratory calibration with high accuracy for polarization remote sensor, an innovative high precision polarimetric calibration instrument with adjustable degree of linear polarization (DoLP) in a wide dynamic range called adjustable polarization light source (APOLS) has been developed. APOLS consists of a collimated light source (CLS) and a polarization state adjuster (PSA). The PSA contains four parallel K9 glass plates, which can be orientated from 0° to 65° accurately controlled by electromechanical driving mechanism whose rotation accuracy is better than ±5″. Regarding the DoLP of APOLS, its adjustment range is from 0 to 0.72 within the spectral range from 460 to 2000 nm. The theoretical model of APOLS was established to describe the DoLP produced by multiple refraction of transmitted light. Meanwhile, the major systematic factors contributing to the DoLP uncertainty such as refractive index and absorption of K9 glass, incident angle, instability and parallelism of light source were analyzed. By using the spectro-polarimetric analyzer (SPOLA), the uncertainty evaluation experiments of APOLS were carried out. The results showed that when the DoLP value was in the range of 0.26 to 0.72, the uncertainty was less than 0.5%, and when the DoLP value was in the range of 0.003 to 0.26, the uncertainty was in the range of 8.5993% to 0.5534%. Moreover, the uncertainty was in the range of 0.0027% to 0.0032% when the uncertainty of the CLS was not considered. The consistency evaluation between APOLS and SPOLA ranged from -0.36 to 0.6 indicates the experimental results are satisfying. It can be concluded that the APOLS significantly improved the dynamic range and accuracy of the polarimetric calibration instrument.

为满足偏振遥感器发射前实验室高精度标定的要求，创新的高精度偏振标定仪，在宽动态范围内可调节线性偏振度（DoLP），称为可调偏振光源（APOLS）。被开发。APOLS 由准直光源 (CLS) 和偏振态调节器 (PSA) 组成。PSA包含四块平行的K9玻璃板，可通过机电驱动机构精确控制从0°到65°的方向，旋转精度优于±5″。关于APOLS的DoLP，在460～2000nm的光谱范围内，其调整范围为0～0.72。建立了APOLS的理论模型来描述透射光多次折射产生的DoLP。同时，分析了K9玻璃的折射率和吸收、入射角、光源的不稳定性和平行度等影响DoLP不确定性的主要系统因素。利用光谱偏振分析仪（SPOLA）进行了APOLS的不确定度评价实验。结果表明，当DoLP值在0.26~0.72范围内时，不确定度小于0.5%，当DoLP值在0.003~0.26范围内时，不确定度在8.5993%~0.5534范围内%。此外，当不考虑 CLS 的不确定性时，不确定性在 0.0027% 到 0.0032% 的范围内。APOLS和SPOLA之间的一致性评价范围为-0.36到0.6，表明实验结果令人满意。