Transmittance measurement using scanning LED
In order to measure the transmittance for a large field of view (FOV), a system based on scanning LED is developed. The system mainly consists of tunable LEDs, a glass diffuser and a camera. The LED panel would display different colors in the CIE color space. An algorithm of converting the light wav...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/81578 http://hdl.handle.net/10220/47491 |
| _version_ | 1824455872028344320 |
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| author | Rosmin Elsa Mohan Lau, Gih-Keong Asundi, Anand Krishna Ping, Yao |
| author2 | Asundi, Anand K. |
| author_facet | Asundi, Anand K. Rosmin Elsa Mohan Lau, Gih-Keong Asundi, Anand Krishna Ping, Yao |
| author_sort | Rosmin Elsa Mohan |
| collection | NTU |
| description | In order to measure the transmittance for a large field of view (FOV), a system based on scanning LED is developed. The system mainly consists of tunable LEDs, a glass diffuser and a camera. The LED panel would display different colors in the CIE color space. An algorithm of converting the light wavelength to the RGB values is adopted. The images are captured using a monochrome camera. Depending on the number of colors displayed, the transmittance map for the entire spread of visible colors can be determined. Results are compared with those measured through a spectrometer. The spectral transmittance for the two methods exhibit good similarity. The system provides a means of measuring transmittance with no moving parts and can be extended to other hyperspectral imaging applications. |
| first_indexed | 2025-02-19T03:45:06Z |
| format | Conference Paper |
| id | ntu-10356/81578 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:45:06Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/815782023-03-04T17:08:14Z Transmittance measurement using scanning LED Rosmin Elsa Mohan Lau, Gih-Keong Asundi, Anand Krishna Ping, Yao Asundi, Anand K. School of Mechanical and Aerospace Engineering Fifth International Conference on Optical and Photonics Engineering DRNTU::Engineering::Mechanical engineering Transmittance Measurement Scanning LED In order to measure the transmittance for a large field of view (FOV), a system based on scanning LED is developed. The system mainly consists of tunable LEDs, a glass diffuser and a camera. The LED panel would display different colors in the CIE color space. An algorithm of converting the light wavelength to the RGB values is adopted. The images are captured using a monochrome camera. Depending on the number of colors displayed, the transmittance map for the entire spread of visible colors can be determined. Results are compared with those measured through a spectrometer. The spectral transmittance for the two methods exhibit good similarity. The system provides a means of measuring transmittance with no moving parts and can be extended to other hyperspectral imaging applications. Published version 2019-01-16T07:30:30Z 2019-12-06T14:34:10Z 2019-01-16T07:30:30Z 2019-12-06T14:34:10Z 2017 Conference Paper Ping, Y., Rosmin Elsa Mohan, Lau, G.-K., & Asundi, A. K. (2017). Transmittance measurement using scanning LED. Fifth International Conference on Optical and Photonics Engineering, 10449, 104492R-. doi: 10.1117/12.2270892 https://hdl.handle.net/10356/81578 http://hdl.handle.net/10220/47491 10.1117/12.2270892 en © 2017 Society of Photo-optical Instrumentation Engineers. All rights reserved. This paper was published in Fifth International Conference on Optical and Photonics Engineering and is made available with permission of Society of Photo-optical Instrumentation Engineers. 5 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Mechanical engineering Transmittance Measurement Scanning LED Rosmin Elsa Mohan Lau, Gih-Keong Asundi, Anand Krishna Ping, Yao Transmittance measurement using scanning LED |
| title | Transmittance measurement using scanning LED |
| title_full | Transmittance measurement using scanning LED |
| title_fullStr | Transmittance measurement using scanning LED |
| title_full_unstemmed | Transmittance measurement using scanning LED |
| title_short | Transmittance measurement using scanning LED |
| title_sort | transmittance measurement using scanning led |
| topic | DRNTU::Engineering::Mechanical engineering Transmittance Measurement Scanning LED |
| url | https://hdl.handle.net/10356/81578 http://hdl.handle.net/10220/47491 |
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