A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter
Hyperspectral LiDAR (HSL) technology can obtain spectral and ranging information from targets by processing the recorded waveforms and measuring the time of flight (ToF). With the development of the supercontinuum laser (SCL), it is technically easier to develop an active hyperspectral LiDAR system...
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MDPI AG
2019-04-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/7/1620 |
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| author | Yuwei Chen Wei Li Juha Hyyppä Ning Wang Changhui Jiang Fanrong Meng Lingli Tang Eetu Puttonen Chuanrong Li |
| author_facet | Yuwei Chen Wei Li Juha Hyyppä Ning Wang Changhui Jiang Fanrong Meng Lingli Tang Eetu Puttonen Chuanrong Li |
| author_sort | Yuwei Chen |
| collection | DOAJ |
| description | Hyperspectral LiDAR (HSL) technology can obtain spectral and ranging information from targets by processing the recorded waveforms and measuring the time of flight (ToF). With the development of the supercontinuum laser (SCL), it is technically easier to develop an active hyperspectral LiDAR system that can simultaneously collect both spatial information and extensive spectral information from targets. Compared with traditional LiDAR technology, which can only obtain range and intensity information at the selected spectral wavelengths, HSL detection technology has demonstrated its potential and adaptability for various quantitative applications from its spectrally resolved waveforms. However, with most previous HSLs, the collected spectral information is discrete, and such information might be insufficient and restrict the further applicability of the HSLs. In this paper, a tunable HSL technology using an acousto-optic tunable filter (AOTF) as a spectroscopic device was proposed, designed, and tested to address this issue. Both the general range precision and the accuracy of the spectral measurement were evaluated. By tuning the spectroscopic device in the time dimension, the proposed AOTF-HSL could achieve backscattered echo with continuous coverage of the full spectrum of 500–1000 nm, which had the unique characteristics of a continuous spectrum in the visible and near infrared (VNIR) regions with 10 nm spectral resolution. Yellow and green leaves from four plants (aloe, dracaena, balata, and radermachera) were measured using the AOTF-HSL to assess its feasibility in agriculture application. The spectral profiles measured by a standard spectrometer (SVC<sup>©</sup> HR-1024) were used as a reference for evaluating the measurements of the AOTF-HSL. The difference between the spectral measurements collected from active and passive instruments was minor. The comparison results show that the AOTF-based consecutive and high spectral resolution HSL was effective for this application. |
| first_indexed | 2024-04-11T13:06:38Z |
| format | Article |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-04-11T13:06:38Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f4d5fa24fd59494cadeca175711d63d72022-12-22T04:22:45ZengMDPI AGSensors1424-82202019-04-01197162010.3390/s19071620s19071620A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable FilterYuwei Chen0Wei Li1Juha Hyyppä2Ning Wang3Changhui Jiang4Fanrong Meng5Lingli Tang6Eetu Puttonen7Chuanrong Li8Center of Excellence of Laser Scanning Research, Finnish Geospatial Research Institute, Masala FI-02430, FinlandKey Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences (CAS), Beijing 100094, ChinaCenter of Excellence of Laser Scanning Research, Finnish Geospatial Research Institute, Masala FI-02430, FinlandKey Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences (CAS), Beijing 100094, ChinaCenter of Excellence of Laser Scanning Research, Finnish Geospatial Research Institute, Masala FI-02430, FinlandKey Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences (CAS), Beijing 100094, ChinaKey Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences (CAS), Beijing 100094, ChinaCenter of Excellence of Laser Scanning Research, Finnish Geospatial Research Institute, Masala FI-02430, FinlandKey Laboratory of Quantitative Remote Sensing Information Technology, Chinese Academy of Sciences (CAS), Beijing 100094, ChinaHyperspectral LiDAR (HSL) technology can obtain spectral and ranging information from targets by processing the recorded waveforms and measuring the time of flight (ToF). With the development of the supercontinuum laser (SCL), it is technically easier to develop an active hyperspectral LiDAR system that can simultaneously collect both spatial information and extensive spectral information from targets. Compared with traditional LiDAR technology, which can only obtain range and intensity information at the selected spectral wavelengths, HSL detection technology has demonstrated its potential and adaptability for various quantitative applications from its spectrally resolved waveforms. However, with most previous HSLs, the collected spectral information is discrete, and such information might be insufficient and restrict the further applicability of the HSLs. In this paper, a tunable HSL technology using an acousto-optic tunable filter (AOTF) as a spectroscopic device was proposed, designed, and tested to address this issue. Both the general range precision and the accuracy of the spectral measurement were evaluated. By tuning the spectroscopic device in the time dimension, the proposed AOTF-HSL could achieve backscattered echo with continuous coverage of the full spectrum of 500–1000 nm, which had the unique characteristics of a continuous spectrum in the visible and near infrared (VNIR) regions with 10 nm spectral resolution. Yellow and green leaves from four plants (aloe, dracaena, balata, and radermachera) were measured using the AOTF-HSL to assess its feasibility in agriculture application. The spectral profiles measured by a standard spectrometer (SVC<sup>©</sup> HR-1024) were used as a reference for evaluating the measurements of the AOTF-HSL. The difference between the spectral measurements collected from active and passive instruments was minor. The comparison results show that the AOTF-based consecutive and high spectral resolution HSL was effective for this application.https://www.mdpi.com/1424-8220/19/7/1620hyperspectral LiDARsupercontinuum laser (SCL)acousto-optic tunable filter (AOTF)system calibrationvegetation analysis |
| spellingShingle | Yuwei Chen Wei Li Juha Hyyppä Ning Wang Changhui Jiang Fanrong Meng Lingli Tang Eetu Puttonen Chuanrong Li A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter Sensors hyperspectral LiDAR supercontinuum laser (SCL) acousto-optic tunable filter (AOTF) system calibration vegetation analysis |
| title | A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter |
| title_full | A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter |
| title_fullStr | A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter |
| title_full_unstemmed | A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter |
| title_short | A 10-nm Spectral Resolution Hyperspectral LiDAR System Based on an Acousto-Optic Tunable Filter |
| title_sort | 10 nm spectral resolution hyperspectral lidar system based on an acousto optic tunable filter |
| topic | hyperspectral LiDAR supercontinuum laser (SCL) acousto-optic tunable filter (AOTF) system calibration vegetation analysis |
| url | https://www.mdpi.com/1424-8220/19/7/1620 |
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