CAJ | 학술논문

系统的成像波段分别为近紫外（300 nm～380 nm ）波段，可见光（380 nm～760 nm ）波段和近红外（760 nm～1100 nm ）波段。通过搭建与该光学系统相对应的辐射定标装置，建立辐射定标数学模型，对已研制的三波段成像光学系统进行绝对辐射定标的研究。针对系统成像波段光谱范围较宽的特点，以分波段辐射定标方法对于测量得到的定标数据，采用最小二乘线性拟合法进行处理，对算法进行修正，再对定标数据进行处理。通过实验验证了2种方法的定标精度，结果表明：修正后的算法可得到精度更高的定标曲线，测量相对误差不超过5％，定标结果满足实际工程需求。
계통적성상파단분별위근자외（300 nm～380 nm ）파단，가견광（380 nm～760 nm ）파단화근홍외（760 nm～1100 nm ）파단。통과탑건여해광학계통상대응적복사정표장치，건립복사정표수학모형，대이연제적삼파단성상광학계통진행절대복사정표적연구。침대계통성상파단광보범위교관적특점，이분파단복사정표방법대우측량득도적정표수거，채용최소이승선성의합법진행처리，대산법진행수정，재대정표수거진행처리。통과실험험증료2충방법적정표정도，결과표명：수정후적산법가득도정도경고적정표곡선，측량상대오차불초과5％，정표결과만족실제공정수구。
T his paper focuses on radiometric calibration of triple-band optical imaging system which includes near ultraviolet (300 nm~380 nm) ,visible (380 nm~760 nm) and near infra-red (760 nm~1 100 nm) ranges .The radiometric calibration system was set up ,the mathe-matical model was established and the radiometric calibration experiment was conducted .As the optical system operated at three wavebands ,technique of sub-band radiometric calibration was adopted .The calibration data were fitted by linear least squares and then the algorithm was modified .At last the calibration data were processed .Experimental results verify the cali-bration accuracy of two methods .The calibration curve obtained by the modified algorithm is with higher accuracy .The relative error of measurements can be less than 5% ,which meets the needs of actual projects .