A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers
Interferometric imagers based on integrated optics have the advantages of miniaturization and low cost compared with traditional telescope imaging systems and are expected to be applied in the field of space target detection. Phase measurement of the complex coherence factor is crucial for the image...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/8/2194 |
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| author | Jialiang Chen Qinghua Yu Ben Ge Chuang Zhang Yan He Shengli Sun |
| author_facet | Jialiang Chen Qinghua Yu Ben Ge Chuang Zhang Yan He Shengli Sun |
| author_sort | Jialiang Chen |
| collection | DOAJ |
| description | Interferometric imagers based on integrated optics have the advantages of miniaturization and low cost compared with traditional telescope imaging systems and are expected to be applied in the field of space target detection. Phase measurement of the complex coherence factor is crucial for the image reconstruction of interferometric imaging technology. This study discovers the effect of the phase of the complex coherence factor on the extrema of the interference fringes in the interferometric imager and proposes a method for calculating the phase difference of the complex coherence factor of two interference signals by comparing the extrema of the interferometric fringes in the area of approximate linear change in the envelope shape to obtain the phase information required for imaging. Experiments using two interferometric signals with a phase difference of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>π</mi></semantics></math></inline-formula> were conducted to verify the validity and feasibility of the phase difference measurement method. Compared with the existing phase measurement methods, this method does not need to calibrate the position of the zero optical path difference and can be applied to the integrated optical interferometric imager using a single-mode fiber, which also allows the imager to work in a more flexible way. The theoretical phase measurement accuracy of this method is higher than 0.05 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>π</mi></semantics></math></inline-formula>, which meets the image reconstruction requirements. |
| first_indexed | 2024-03-11T04:33:53Z |
| format | Article |
| id | doaj.art-4970e456cad046ecac1c2e870d5d4951 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T04:33:53Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-4970e456cad046ecac1c2e870d5d49512023-11-17T21:13:22ZengMDPI AGRemote Sensing2072-42922023-04-01158219410.3390/rs15082194A Phase Difference Measurement Method for Integrated Optical Interferometric ImagersJialiang Chen0Qinghua Yu1Ben Ge2Chuang Zhang3Yan He4Shengli Sun5Key Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaKey Laboratory of Intelligent Infrared Perception, Chinese Academy of Sciences, Shanghai Institute of Technical Physics of Chinese Academy of Sciences, Shanghai 200083, ChinaInterferometric imagers based on integrated optics have the advantages of miniaturization and low cost compared with traditional telescope imaging systems and are expected to be applied in the field of space target detection. Phase measurement of the complex coherence factor is crucial for the image reconstruction of interferometric imaging technology. This study discovers the effect of the phase of the complex coherence factor on the extrema of the interference fringes in the interferometric imager and proposes a method for calculating the phase difference of the complex coherence factor of two interference signals by comparing the extrema of the interferometric fringes in the area of approximate linear change in the envelope shape to obtain the phase information required for imaging. Experiments using two interferometric signals with a phase difference of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>π</mi></semantics></math></inline-formula> were conducted to verify the validity and feasibility of the phase difference measurement method. Compared with the existing phase measurement methods, this method does not need to calibrate the position of the zero optical path difference and can be applied to the integrated optical interferometric imager using a single-mode fiber, which also allows the imager to work in a more flexible way. The theoretical phase measurement accuracy of this method is higher than 0.05 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>π</mi></semantics></math></inline-formula>, which meets the image reconstruction requirements.https://www.mdpi.com/2072-4292/15/8/2194integrated opticsinterferometric imaginginterference fringesphase difference measurement |
| spellingShingle | Jialiang Chen Qinghua Yu Ben Ge Chuang Zhang Yan He Shengli Sun A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers Remote Sensing integrated optics interferometric imaging interference fringes phase difference measurement |
| title | A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers |
| title_full | A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers |
| title_fullStr | A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers |
| title_full_unstemmed | A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers |
| title_short | A Phase Difference Measurement Method for Integrated Optical Interferometric Imagers |
| title_sort | phase difference measurement method for integrated optical interferometric imagers |
| topic | integrated optics interferometric imaging interference fringes phase difference measurement |
| url | https://www.mdpi.com/2072-4292/15/8/2194 |
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