Research progress in high-precision spot position detection technology based on the four-quadrant detector

Haipeng Su; Xianguo Kou; Yong Liu; Zeyuan Wang; Xinyan Jiang; Jian Chen; Hai-Zhi Song

doi:10.1117/12.3048154

13 December 2024 Research progress in high-precision spot position detection technology based on the four-quadrant detector

Haipeng Su, Xianguo Kou, Yong Liu, Zeyuan Wang, Xinyan Jiang, Jian Chen, Hai-Zhi Song

Author Affiliations +

Proceedings Volume 13492, AOPC 2024: Laser Technology and Applications; 134921H (2024) https://doi.org/10.1117/12.3048154
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

The spot position detection technology based on the four-quadrant detector plays an important role in fields such as laser semi-active guidance, space laser communication, medicine, and precision measurement. The paper systematically summarizes the research progress of high-precision spot position detection technology based on the sum-and-difference algorithm model. First, the improved algorithm models under four conditions are discussed, namely the circular spot and uniform distribution, the circular spot and Gaussian distribution, the elliptical spot and uniform distribution, and the elliptical spot and Gaussian distribution. Further optimization algorithms based on these four models are also introduced. On this basis, although the detection accuracy has been significantly improved, there are still other factors that affect measurement accuracy in practical applications, such as inconsistent quadrant responsivity, noise, atmospheric turbulence, etc. These factors and their influencing trends or correction methods are classified and summarized. With the development of hardware processing capabilities, more new signal processing methods are being used to improve detection accuracy or precision, such as the digital lock-in amplifier method, the neural network method, the Kalman filtering method, etc. Some of these signal processing methods and their positive effects are introduced. Finally, prospects for future development are discussed.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haipeng Su, Xianguo Kou, Yong Liu, Zeyuan Wang, Xinyan Jiang, Jian Chen, and Hai-Zhi Song "Research progress in high-precision spot position detection technology based on the four-quadrant detector", Proc. SPIE 13492, AOPC 2024: Laser Technology and Applications, 134921H (13 December 2024); https://doi.org/10.1117/12.3048154

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KEYWORDS

Signal to noise ratio

Signal processing

Interference (communication)

Sensors

Detection and tracking algorithms

Signal filtering

Distortion

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