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Internal stray radiation measurement for cryogenic infrared imaging systems using a spherical mirror
Tian, Q. J.; S. T. Chang; F. Y. He; Z. Li and Y. F. Qiao
2017
Source PublicationApplied Optics
Volume56Issue:17
AbstractInternal stray radiation is a key factor that influences infrared imaging systems, and its suppression level is an important criterion to evaluate system performance, especially for cryogenic infrared imaging systems, which are highly sensitive to thermal sources. In order to achieve accurate measurement for internal stray radiation, an approach is proposed, which is based on radiometric calibration using a spherical mirror. First of all, the theory of spherical mirror design is introduced. Then, the calibration formula considering the integration time is presented. Following this, the details regarding the measurement method are presented. By placing a spherical mirror in front of the infrared detector, the influence of internal factors of the detector on system output can be obtained. According to the calibration results of the infrared imaging system, the output caused by internal stray radiation can be acquired. Finally, several experiments are performed in a chamber with controllable inside temperatures to validate the theory proposed in this paper. Experimental results show that the measurement results are in good accordance with the theoretical analysis, and demonstrate that the proposed theories are valid and can be employed in practical applications. The proposed method can achieve accurate measurement for internal stray radiation at arbitrary integration time and ambient temperatures. The measurement result can be used to evaluate whether the suppression level meets the system requirement. (C) 2017 Optical Society of America
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59227
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Tian, Q. J.,S. T. Chang,F. Y. He,et al. Internal stray radiation measurement for cryogenic infrared imaging systems using a spherical mirror[J]. Applied Optics,2017,56(17).
APA Tian, Q. J.,S. T. Chang,F. Y. He,&Z. Li and Y. F. Qiao.(2017).Internal stray radiation measurement for cryogenic infrared imaging systems using a spherical mirror.Applied Optics,56(17).
MLA Tian, Q. J.,et al."Internal stray radiation measurement for cryogenic infrared imaging systems using a spherical mirror".Applied Optics 56.17(2017).
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