Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method
Spectroradiometers exhibit the smallest aberration and the optimum response at the field-of-view (FOV) center. The aberration increases and the response deteriorates at positions further away from the FOV center, which leads to nonuniformity in the spectroradiometer FOV. In this study, a concentric-...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/2/56 |
| _version_ | 1797477124320264192 |
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| author | Zhaoqiang Jiao Yiwen Li Ge Chen Yao Li Shijie Chai Puyousen Zhang |
| author_facet | Zhaoqiang Jiao Yiwen Li Ge Chen Yao Li Shijie Chai Puyousen Zhang |
| author_sort | Zhaoqiang Jiao |
| collection | DOAJ |
| description | Spectroradiometers exhibit the smallest aberration and the optimum response at the field-of-view (FOV) center. The aberration increases and the response deteriorates at positions further away from the FOV center, which leads to nonuniformity in the spectroradiometer FOV. In this study, a concentric-circles method for correcting the spectroradiometer FOV nonuniformity was developed. The calibration experiment for FOV nonuniformity was conducted by establishing the experimental platform. The nonuniformity correction coefficients were obtained and then used to fit the correction function curve within the whole FOV, allowing for correction of measurement targets with an arbitrary shape. The radiation intensity of the blackbody at different temperatures was obtained by measurement, and the nonuniformity coefficient was used to correct it. After correction, the error was within 1.84% for the spectrally integrated radiant intensity in the non-absorption band. Using this correction method, efficient calibration of spectroradiometer nonuniformity can be achieved, thereby enhancing the measurement accuracy of the spectroradiometer. |
| first_indexed | 2024-03-09T21:13:10Z |
| format | Article |
| id | doaj.art-94d3b2f949c2423a9faaa705254e40b7 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T21:13:10Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-94d3b2f949c2423a9faaa705254e40b72023-11-23T21:40:46ZengMDPI AGPhotonics2304-67322022-01-01925610.3390/photonics9020056Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles MethodZhaoqiang Jiao0Yiwen Li1Ge Chen2Yao Li3Shijie Chai4Puyousen Zhang5Aviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaAviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaAviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaAviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaAviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaAviation Engineering School, Air Force Engineering University, Xi’an 710043, ChinaSpectroradiometers exhibit the smallest aberration and the optimum response at the field-of-view (FOV) center. The aberration increases and the response deteriorates at positions further away from the FOV center, which leads to nonuniformity in the spectroradiometer FOV. In this study, a concentric-circles method for correcting the spectroradiometer FOV nonuniformity was developed. The calibration experiment for FOV nonuniformity was conducted by establishing the experimental platform. The nonuniformity correction coefficients were obtained and then used to fit the correction function curve within the whole FOV, allowing for correction of measurement targets with an arbitrary shape. The radiation intensity of the blackbody at different temperatures was obtained by measurement, and the nonuniformity coefficient was used to correct it. After correction, the error was within 1.84% for the spectrally integrated radiant intensity in the non-absorption band. Using this correction method, efficient calibration of spectroradiometer nonuniformity can be achieved, thereby enhancing the measurement accuracy of the spectroradiometer.https://www.mdpi.com/2304-6732/9/2/56spectroradiometeraberrationfield-of-view (FOV) nonuniformityconcentric-circles correction |
| spellingShingle | Zhaoqiang Jiao Yiwen Li Ge Chen Yao Li Shijie Chai Puyousen Zhang Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method Photonics spectroradiometer aberration field-of-view (FOV) nonuniformity concentric-circles correction |
| title | Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method |
| title_full | Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method |
| title_fullStr | Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method |
| title_full_unstemmed | Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method |
| title_short | Correction of Spatial Nonuniformity in Spectroradiometer Field-of-View Using a Concentric-Circles Method |
| title_sort | correction of spatial nonuniformity in spectroradiometer field of view using a concentric circles method |
| topic | spectroradiometer aberration field-of-view (FOV) nonuniformity concentric-circles correction |
| url | https://www.mdpi.com/2304-6732/9/2/56 |
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