Abstract

A four-quadrant detector is a kind of photoelectric detector that can quickly and accurately measure the incident angle of light. However, its ability to measure in a large field of view (FOV) is limited by its hardware structure and its calculation principle. To solve these problems, this paper proposes an improved algorithm that can extend the measurement linear range without reducing its measurement accuracy. After that, through simulation and experiment, we compare it with many other location algorithms, including the most widely used classical algorithm and the logarithmic algorithm suitable for large FOVs. Finally, the following conclusions can be drawn from both theoretical data and experimental data: the improved algorithm can significantly improve the measurement accuracy over 50% in the same FOV condition, and the measurable range can be expanded over 25% in the same accuracy requirement. At the same time, the robustness of noise does not decrease; when the root mean square error of the classical algorithm fluctuates at 0.1° in different SNR conditions, the improved algorithm is also 0.1°, while the logarithmic algorithm can reach 1.7°, and other algorithms are around 0.25°. In addition, the improved algorithm is more stable in measuring a certain direction and can effectively avoid the influence from the offset of incident light in another axis.

© 2019 Optical Society of America

Neural-network-based method for improving measurement accuracy of four-quadrant detectors

Zhaobing Qiu, Weihao Jia, Xiao Ma, Bohao Zou, and Liyu Lin
Appl. Opt. 61(9) F9-F14 (2022)

Improved calibration method of a four-quadrant detector based on Bayesian theory in a laser auto-collimation measurement system

Kuan Diao, Xiaojun Liu, Zhenjian Yao, Wenlong Lu, and Wenjun Yang
Appl. Opt. 61(19) 5545-5551 (2022)

Quadrant response model and error analysis of four-quadrant detectors related to the non-uniform spot and blind area

Jun Zhang, Weixian Qian, Guohua Gu, Kan Ren, Qian Chen, Chen Mao, Guixia Cai, Zewei Liu, and Liwei Xu
Appl. Opt. 57(24) 6898-6905 (2018)

Improved measurement accuracy of spot position on an InGaAs quadrant detector

Jiabin Wu, Yunshan Chen, Shijie Gao, Yimang Li, and Zhiyong Wu
Appl. Opt. 54(27) 8049-8054 (2015)

Linear polarization optimized Stokes polarimeter based on four-quadrant detector

Chao He, Jintao Chang, Yong Wang, Ran Liao, Honghui He, Nan Zeng, and Hui Ma
Appl. Opt. 54(14) 4458-4463 (2015)