Transmittance measurement using scanning LED

Yao Ping; Rosmin Elsa Mohan; Gih-Keong Lau; Anand Krishna Asundi

doi:10.1117/12.2270892

13 June 2017 Transmittance measurement using scanning LED

Yao Ping, Rosmin Elsa Mohan, Gih-Keong Lau, Anand Krishna Asundi

Proceedings Volume 10449, Fifth International Conference on Optical and Photonics Engineering; 104492R (2017) https://doi.org/10.1117/12.2270892
Event: Fifth International Conference on Optical and Photonics Engineering, 2017, Singapore, Singapore

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.

Citation Download Citation

Yao Ping, Rosmin Elsa Mohan, Gih-Keong Lau, and Anand Krishna Asundi "Transmittance measurement using scanning LED", Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 104492R (13 June 2017); https://doi.org/10.1117/12.2270892

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