Effects of a misaligned photodetector in autocollimators on angle measurements

doi:10.3788/CO.2019-0207

CIOMP OpenIR

	Effects of a misaligned photodetector in autocollimators on angle measurements
	J. Luo,X.-H. Zhang,X. He,L. Ye and T.-Y. Zhang
	2020
发表期刊	Chinese Optics
ISSN	20951531
卷号	13 期号:3 页码:558-567
摘要	As one of the key errors in autocollimators, misalignment of the photodetector is analyzed and modeled carefully in this paper. Effect of misalignment of the photodetector on angle measurements is characterized, when the photodetector in any position and orientation in space with respect to the theoretical image plane of autocollimators. It is shown that the angular measurement errors of autocollimators induced by a misaligned photodetector increase with greater measuring range L, larger angle and smaller focal length f of the collimating object lens. When f=300 mm, L=100 mm, =20, the angular measurement error caused by a misaligned photodetector is 0.004 5. The effects of each photodetector misalignment error on angle measurements in autocollimators are characterized. The model proposed in this paper is validated. Among all kinds of photodetector misalignment errors, the defocusing error has the greatest influences on autocollimators. Hence, it is critical to choose an imaging objective with longer focal length, reduce the measurement distance, and improve the installation accuracy of the photodetector along the axis. The model proposed in this paper helps to systematically obtain the angular measurement errors caused by a misaligned photodetector, which will play a key role in building a better error analysis model for autocollimators. 2020, China Science Publishing & Media LTD. All right reserved.
DOI	10.3788/CO.2019-0207
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收录类别	EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64477
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	J. Luo,X.-H. Zhang,X. He,L. Ye and T.-Y. Zhang. Effects of a misaligned photodetector in autocollimators on angle measurements[J]. Chinese Optics,2020,13(3):558-567.
APA	J. Luo,X.-H. Zhang,X. He,L. Ye and T.-Y. Zhang.(2020).Effects of a misaligned photodetector in autocollimators on angle measurements.Chinese Optics,13(3),558-567.
MLA	J. Luo,X.-H. Zhang,X. He,L. Ye and T.-Y. Zhang."Effects of a misaligned photodetector in autocollimators on angle measurements".Chinese Optics 13.3(2020):558-567.

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