Flexible micro-spectrometer for grape maturation monitoring

Sophie Jenne; Hans Zappe

doi:10.1117/12.2652893

15 March 2023 Flexible micro-spectrometer for grape maturation monitoring

Sophie Jenne, Hans Zappe

Proceedings Volume 12434, MOEMS and Miniaturized Systems XXII; 1243408 (2023) https://doi.org/10.1117/12.2652893
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

UV/VIS spectroscopy is a useful and efficient tool for non-destructive remote and real-time monitoring of the maturation of grapes and other agricultural products. For this purpose, we have developed a fully-integrated micro-spectrometer consisting of four LEDs emitting at different wavelengths, which will allow a spectral analysis of the sample under investigation in reflection mode. The positioning of the emitters and photodiodes with respect to each other was optimized using simulations employing a grape model based on the Henyey-Greenstein scattering model, with parameters calculated from reflectance and transmission data of real grapes. The sensor was fabricated on a polyimide stripe on which the optical components were placed and interconnected on one side and an array of electrical contacts on the other side allowed interfacing of the sensor with the driving electronics. With an overall thickness of 11 μm, this sensor stripe can be placed inside a grape bunch and acquire reflectance data continuously in the vineyard during the maturation period.

Conference Presentation

Citation Download Citation

Sophie Jenne and Hans Zappe "Flexible micro-spectrometer for grape maturation monitoring", Proc. SPIE 12434, MOEMS and Miniaturized Systems XXII, 1243408 (15 March 2023); https://doi.org/10.1117/12.2652893

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