Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index
As the demand for high-precision measurements of refractive index variations in marine environments increases, eliminating potential sources of measurement errors has become an urgent issue. One of these error sources is the impact of optical path length perturbations. This study investigates the ef...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-02-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/3/473 |
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| author | Xinyi Zhang Jiaxin Zhao Hu Wang Liyan Li Songtao Fan Yongjie Wang Yan Zhou |
| author_facet | Xinyi Zhang Jiaxin Zhao Hu Wang Liyan Li Songtao Fan Yongjie Wang Yan Zhou |
| author_sort | Xinyi Zhang |
| collection | DOAJ |
| description | As the demand for high-precision measurements of refractive index variations in marine environments increases, eliminating potential sources of measurement errors has become an urgent issue. One of these error sources is the impact of optical path length perturbations. This study investigates the effect of optical path perturbations on the accuracy of the measurements using the interference method. By establishing an error analysis model, this study analyzes the systematic errors induced by optical path perturbations and verifies the error patterns under different refractive index variations through simulations and experiments. The results show that the errors introduced by optical path perturbations are linearly related to the magnitude of the perturbations, and the error increases as the magnitude of the perturbation grows. The error becomes negligible when the magnitude of the optical path perturbations relative to the measurement zone length is one order of magnitude smaller than the refractive index measurement accuracy. The experimental and simulation results are consistent, validating the accuracy of the model. This indicates that in high-precision seawater refractive index measurements using the interference method, perturbations in the measurement region cannot be ignored, and it is difficult to achieve higher measurement precision through physical vibration isolation alone, highlighting the urgent need for new solutions. |
| format | Article |
| id | doaj-art-e5f623720509436db805632c0ad9eb03 |
| institution | DOAJ |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-e5f623720509436db805632c0ad9eb032025-08-20T02:42:34ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-02-0113347310.3390/jmse13030473Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive IndexXinyi Zhang0Jiaxin Zhao1Hu Wang2Liyan Li3Songtao Fan4Yongjie Wang5Yan Zhou6Optoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaOptoelectronic Systems Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaAs the demand for high-precision measurements of refractive index variations in marine environments increases, eliminating potential sources of measurement errors has become an urgent issue. One of these error sources is the impact of optical path length perturbations. This study investigates the effect of optical path perturbations on the accuracy of the measurements using the interference method. By establishing an error analysis model, this study analyzes the systematic errors induced by optical path perturbations and verifies the error patterns under different refractive index variations through simulations and experiments. The results show that the errors introduced by optical path perturbations are linearly related to the magnitude of the perturbations, and the error increases as the magnitude of the perturbation grows. The error becomes negligible when the magnitude of the optical path perturbations relative to the measurement zone length is one order of magnitude smaller than the refractive index measurement accuracy. The experimental and simulation results are consistent, validating the accuracy of the model. This indicates that in high-precision seawater refractive index measurements using the interference method, perturbations in the measurement region cannot be ignored, and it is difficult to achieve higher measurement precision through physical vibration isolation alone, highlighting the urgent need for new solutions.https://www.mdpi.com/2077-1312/13/3/473interference methodhigh-precision measurementsrefractive index variationsoptical path length perturbationssystematic errors |
| spellingShingle | Xinyi Zhang Jiaxin Zhao Hu Wang Liyan Li Songtao Fan Yongjie Wang Yan Zhou Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index Journal of Marine Science and Engineering interference method high-precision measurements refractive index variations optical path length perturbations systematic errors |
| title | Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index |
| title_full | Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index |
| title_fullStr | Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index |
| title_full_unstemmed | Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index |
| title_short | Influence of Geometric Length Perturbation of Optical Path on Measurement Error of Seawater Refractive Index |
| title_sort | influence of geometric length perturbation of optical path on measurement error of seawater refractive index |
| topic | interference method high-precision measurements refractive index variations optical path length perturbations systematic errors |
| url | https://www.mdpi.com/2077-1312/13/3/473 |
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