A method for suppressing aiming error of dynamic goniometer

Yang Shidong; Zhu Weibin; Huang Yao; Zhu Jin; Xue Zi

doi:10.12086/oee.2024.240209

Article navigation > Opto-Electronic Engineering > 2024 Vol. 51 > No. 12 > 240209

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Yang S D, Zhu W B, Huang Y, et al. A method for suppressing aiming error of dynamic goniometer[J]. Opto-Electron Eng, 2024, 51(12): 240209. doi: 10.12086/oee.2024.240209

Citation:

Yang S D, Zhu W B, Huang Y, et al. A method for suppressing aiming error of dynamic goniometer[J]. Opto-Electron Eng, 2024, 51(12): 240209. doi: 10.12086/oee.2024.240209

A method for suppressing aiming error of dynamic goniometer

1.
College of Metrology Measurement and Instrument, China Jiliang University, Hangzhou, Zhejiang 310018, China
2.
National Institute of Metrology, Beijing 100029, China
3.
Zhejiang Institute of Quality Sciences, Hangzhou, Zhejiang 310019, China

Fund Project: Project supported by National Key Research and Development Program of China (2023YFF0615703), The Zhejiang Provincial Basic Public Welfare Research Plan (TGC24E050001), and National Natural Science Foundation of China (52175526)

More Information

^*Corresponding author: zhuweibin@cjlu.edu.cn
CSTR: 32245.14.oee.2024.240209

Received Date 02 September 2024

Revised Date 20 November 2024

Accepted Date 21 November 2024

Published Date 25 December 2024

Abstract

Abstract

This study investigates methods for suppressing dynamic aiming errors, addressing the issue of dynamic goniometer accuracy being easily affected by light intensity stability during aiming. A Gaussian spotlight intensity distribution model is established, and the mechanism of dynamic aiming error generation is analyzed. The principle of the suppression method based on the lateral photovoltaic effect is demonstrated. A dynamic aiming system is constructed, and experiments are conducted to validate the aiming repeatability and accuracy of the proposed method. The results show that the aiming repeatability is 0.19″, and the aiming accuracy is 0.15″. Compared to the light intensity threshold aiming method, the aiming error is reduced by 66%. Dynamic measurement experiments with angle blocks are conducted, applying the proposed method to the dynamic goniometer system. The results demonstrate that the system accuracy meets the calibration requirements for the grade 1 angle block gauge.
- dynamic goniometer /
- aiming error /
- Gaussian spot /
- transverse photoelectric effect

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References

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Overview

Overview

Dynamic goniometers are widely used in precision engineering and calibration tasks, but their accuracy is often compromised by aiming errors caused by light intensity fluctuations. These errors, prevalent during dynamic operations, limit the reliability of angle measurements and hinder their broader application. To address this issue, this study focuses on developing a robust aiming error suppression method to enhance the precision and repeatability of dynamic goniometers. The research is motivated by the need for stable and accurate aiming mechanisms under varying light conditions. A Gaussian spotlight intensity distribution model is proposed to analyze the mechanism of aiming error generation, providing a theoretical basis for error suppression strategies. Based on this model, a dynamic aiming system leveraging the lateral photovoltaic effect is designed. Unlike traditional methods reliant on intensity thresholds, this approach employs a position-sensitive detector (PSD) to detect spot center positions by utilizing the proportional relationship between electrode currents, effectively reducing dependency on absolute light intensity. Built a dynamic angle measurement system to evaluate the accuracy and repeatability of different aiming methods. Results showed that the system achieved the aiming repeatability of 0.19" and the aiming accuracy of 0.15", representing a 66% reduction in aiming errors compared to conventional methods. Furthermore, dynamic angle measurements were performed using the system on Grade 1 angle blocks, demonstrating that the system meets stringent calibration requirements. The method also exhibited consistent performance under varying rotational speeds, highlighting its robustness and adaptability to different operational conditions. This study contributes to the field by presenting an innovative suppression method for dynamic aiming errors. The findings underscore the potential of PSD-based lateral photovoltaic detection to improve measurement accuracy in dynamic environments. The proposed system not only advances the precision and repeatability of dynamic goniometers but also lays a foundation for further development of dynamic angle measurement technologies.