Transmittance measurement using scanning LED

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationFifth International Conference on Optical and Photonics Engineering
EditorsAnand Krishna Asundi
PublisherSPIE
ISBN (Electronic)9781510613720
DOIs
StatePublished - 2017
Event5th International Conference on Optical and Photonics Engineering - Singapore, Singapore
Duration: 4 Apr 20177 Apr 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10449
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference5th International Conference on Optical and Photonics Engineering
Country/TerritorySingapore
CitySingapore
Period4/04/177/04/17

Keywords

  • Transmittance measurement
  • large FOV
  • scanning LED

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