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. 2022 Mar 8;12:4053. doi: 10.1038/s41598-022-08037-y

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Spectral reconstructions of LEDs and a halogen light source. (a) a green LED, (b) an orange LED, (c) a red LED, (d) an infrared LED, (e) Combined two LEDs (orange and red), and (f) a halogen light source. Solid black lines represent reference spectra which are measured by the grating-based spectrometer. Colored circles represent reconstructed spectra using the MTF filter array spectrometer. Solid light gray lines represent error between reconstructed and reference spectra.