Compact Fluorosensor for Close-Range Remote-Sensing Characterization of Fruits

Qiang Zhang, Yuting Sun, Sune Svanberg

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

The ripeness of fruits is commonly assessed by the visual appearance, but this method is not very accurate and there can be a large variability. We have developed a hand-held sensor based on laser-induced fluorescence to provide more objective guidance. The instrument incorporates a 412 nm continuous wave semiconductor laser and a miniature spectrometer. It was used for monitoring of tropical fruits growing on the tree, and high-quality spectra could be recorded at ranges of 1-2 meters. The spectra feature characteristic dual-peaked emission peaks in the near-IR region due to chlorophyll, as well as blue-green signals due to further pigments. Further, natural waters were studied and showed strong differentiation effects.

Original languageEnglish
Title of host publicationInternational Conference on Optoelectronic Materials and Devices, ICOMD 2021
EditorsYuan Lu, Youlin Gu, Siting Chen
PublisherSPIE
ISBN (Electronic)9781510652040
DOIs
Publication statusPublished - 2022
Event2021 International Conference on Optoelectronic Materials and Devices, ICOMD 2021 - Guangzhou, China
Duration: 2021 Dec 102021 Dec 12

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12164
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2021 International Conference on Optoelectronic Materials and Devices, ICOMD 2021
Country/TerritoryChina
CityGuangzhou
Period2021/12/102021/12/12

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

Free keywords

  • Fruit characterization
  • Laser-induced fluorescence
  • Remote sensing

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