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Transmittance measurement using scanning LED
Author(s): Yao Ping; Rosmin Elsa Mohan; Gih-Keong Lau; Anand Krishna Asundi
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Paper Abstract

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.

Paper Details

Date Published: 13 June 2017
PDF: 4 pages
Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 104492R (13 June 2017); doi: 10.1117/12.2270892
Show Author Affiliations
Yao Ping, Nanyang Technological Univ. (Singapore)
Rosmin Elsa Mohan, d’Optron Pte. Ltd. (Singapore)
Gih-Keong Lau, Nanyang Technological Univ. (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)
d’Optron Pte. Ltd. (Singapore)


Published in SPIE Proceedings Vol. 10449:
Fifth International Conference on Optical and Photonics Engineering
Anand Krishna Asundi, Editor(s)

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