摘要
现有红外偏振探测器盲元检测主要依据GB/T 17444-2013中的判别方法,这会忽略对某些无法正常响应偏振光的异常像元的统计。这些像元无法通过国标剔除,严重影响成像质量,因此需要在原有盲元检测方法的基础上叠加一种偏振盲元检测方法,从而更精准地对偏振红外探测器进行盲元评价。提出了一种通过依据电动起偏器进行消光比测试来获得偏振盲元的方法,可以极大程度地减小由内部偏振角度刻蚀带来的测试误差,同时可以实现对偏振器件偏振盲元与常规过热像元、死像元的多维度同时检测。利用本单位自行研制的320×256探测器进行实验验证。采用国标识别的盲元数量为1010个;引入偏振盲元后,盲元数量为1178个,总体盲元数量比前者增加了0.2%。
The current blind element detection of infrared polarization detectors mainly relies on the discrimination method in GB/T 17444-2013,which ignores the statistical analysis of abnormal elements that cannot respond properly to polarized light.These elements cannot be eliminated by national standards,which seriously affects the imaging quality.Therefore,it is necessary to add a polarization blind element detection method on top of the original blind element detection method,so as to more accurately evaluate the blind element of polarization infrared detectors.A method for obtaining polarization blind elements through extinction ratio testing based on electric polarizers has been proposed,which can greatly reduce the testing error caused by internal polarization angle etching.At the same time,it can achieve multi-dimensional simultaneous detection of polarization blind elements of polarization devices,conventional overheated elements,and dead elements.Experimental verification is carried out using the 320×256 detector developed by our company.The number of blind elements identified using national standards is 1010.After introducing polarization blind elements,the number of blind elements is 1178;The overall number of blind elements increased by 0.2%compared to using the national standard discrimination method.
作者
邢艳蕾
陈晨
邸添阳
XING Yan-lei;CHEN Chen;DI Tian-yang(North China Institute of Electro-Optics,Beijing 100015,China)
出处
《红外》
CAS
2024年第6期35-41,共7页
Infrared
基金
国科学院西部之光项目(中科院人字[2018]6号文件)
中国科学院“十三五”科教基础设施建设项目(发改投资[2020]1394号文件)
西安石油大学研究生联合培养基地项目(西石大研[2017]43号)
西安石油大学创新与实践能力培养项目(YCS22113167)。
关键词
盲元
偏振探测器
消光比
偏振盲元
blind element
polarization detector
extinction ratio
polarization blind element
