Internal stray radiation measurement for cryogenic infrared imaging systems using a spherical mirror

	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
发表期刊	Applied Optics
卷号	56 期号:17
摘要	Internal 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
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59227
专题	中科院长春光机所知识产出
推荐引用方式 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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