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Combined radiometric calibration of ground-based large-aperture infrared photoelectric systems
- Optics and Precision Engineering Vol. 25, Issue 10, Pages: 2541-2550(2017)
- 作者机构：
中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
- 作者简介：
- 基金信息：
DOI：10.3788/OPE.20172510.2541
CLC： TP751Received：27 May 2017，
Accepted：28 June 2017，
Published：25 October 2017
- 稿件说明：
移动端阅览
Jun-chi LIU, Hong-wen LI, Jian-li WANG, et al. Combined radiometric calibration of ground-based large-aperture infrared photoelectric systems[J]. Optics and precision engineering, 2017, 25(10): 2541-2550.
Jun-chi LIU, Hong-wen LI, Jian-li WANG, et al. Combined radiometric calibration of ground-based large-aperture infrared photoelectric systems[J]. Optics and precision engineering, 2017, 25(10): 2541-2550. DOI： 10.3788/OPE.20172510.2541.
摘要
考虑标准红外星定标方法无法测定地基大口径红外光电系统像元级的辐射响应度，进而导致对系统存在的非均匀性现象适应能力差的问题，提出了基于标准红外星与小口径黑体的联合辐射定标方法。该方法以标准红外星为外定标参考源，测定全光路系统的辐射响应度；以小口径黑体为内定标参考源，测定半光路系统像元级的辐射响应度；最后，结合内、外定标结果推算前端光学系统透过率，进而实现系统的全光路像元级辐射响应度定标。开展了自然星红外辐射特性测量实验，并与标准红外星定标方法进行了对比。结果显示：提出方法获得的目标最大反演误差为15.89%，而标准红外星定标方法在最理想情况下获得的最大反演误差为15.92%，表明提出方法的定标精度高于标准红外星定标方法。另外，提出方法能够测定全光路系统像元级的辐射响应度，克服了系统响应非均匀性的影响，进而提高了红外探测器的焦平面利用率，弥补了标准红外星定标方法的应用缺陷。
Abstract
When infrared standard stars are used in radiation calibration for a ground-based large-aperture infrared photoelectric system
it can not determine the radiance responsivity of each pixel and shows a poor adaptability for non-uniformity of the system. To solve this problems
a combined radiometric calibration method based on infrared standard stars and the small-aperture blackbody was proposed. The infrared standard stars were taken as an outer reference source to calibrate the radiance responsivity of the total optics
and the blackbody was taken as the inner reference source to calibrate the radiance responsivity of the partial optics. Finally
the transmittance of the front optics was calculated based on the inner and outer calibration results
and the radiance responsivity of the total optics was calibrated in pixel levels. Several experiments were performed to inverse the illuminance of the infrared stars. The results show that the maximum relative inversion error of the proposed method is 15.89% and that from infrared standard star calibration is 15.92%
which means that the proposed method keeps more accurate than that of the infrared standard star method. Moreover
the radiance responsivity of the total optics corresponding to each pixel is calibrated
and the results indicate that the proposed method overcomes the interference of system non-uniformity
improves the utilization ratio of the focal plane array and makes up the application defect of standard infrared stars.
关键词
Keywords
references
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