摘要
分析了相机结构和测量原理,建立了相机响应模型,理论推导了相对透过率和偏振方位角对偏振测量的影响。采用积分球光源测量了相对透过率,采用旋转线偏振片法和马吕斯定律测量了偏振方位角,最后进行了偏振测量精度验证。测试结果表明,经过偏振定标后,偏振度测量误差约为0.44%。该检测方案可以定标分焦平面式偏振相机性能,定标精度高,能够为分焦平面式偏振相机高精度应用奠定基础。
The Division of Focal-plane Polarimeter camera(DoFP)has unique advantages such as small size,high integration,and strong real-time performance,and is widely used in the field of defect detection.The core components of a division of focal-plane polarimeter camera consist of a Complementary Metal Oxide Semiconductor Photodetector(CMOS),a micro-polarizer array,and a micro lens array device.The division of focal-plane polarimeter camera integrates photodetectors and micro polarizer devices on the same focal plane.By placing a photolithography metal grating linear polarizer array at the front end of a pixel,information acquisition corresponding to one linear polarization direction is achieved for each pixel.Therefore,one frame of imaging can complete the detection of energy in multiple polarization directions.To meet the application requirements of defect detection,it is necessary to ensure the imaging quality of division of focal-plane polarimeter cameras.According to the previous theoretical analysis,the key factors affecting imaging quality are mainly the polarization azimuth deviation of each imaging unit and the non-uniformity of the response of each imaging unit,among which the non-uniformity of response is mainly manifested as the non-uniformity of transmittance.This paper introduces the Stokes model,and establishes a polarization response model for division of focal-plane polarimeter camera cameras.We focused on analyzing the impact of angle errors in relative transmittance and polarization azimuth angle on the measurement polarization error of division of focal-plane polarimeter camera cameras by using the method of calculating partial derivatives.We also analyzed the trend of the measurement polarization error changing with the polarization degree and polarization angle of the incident light.A polarization azimuth measurement system was established to measure the four polarization azimuth angles of a micro polarization array.The system uses an integrating sphere and a rotating polarizer as the standard radia
作者
汪伟
张海裕
柯链宝
康晴
李健军
毕海
WANG Wei;ZHANG Haiyu;KE Lianbao;KANG Qing;LI Jianjun;BI Hai(Jihua Laboratory,Foshan 528200,China;China Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230026,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2024年第9期28-39,共12页
Acta Photonica Sinica
基金
广东省基础与应用基础研究基金(No.2021A1515110780)。
关键词
遥感
分焦平面偏振相机
测量
相对透过率
偏振方位角
偏振定标
误差分析
Remote sensing
Division of focal-plane camera
Measurement
Relative transmission
Polarization azimuth
Polarization calibration
Error analysis
