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Optical Techniques and Sensors for Biological and Agricultural Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Biosensors".

Deadline for manuscript submissions: 25 October 2025 | Viewed by 1148

Special Issue Editors


E-Mail Website
Guest Editor
Institute of Quantum Science and Engineering & Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA
Interests: ultrafast lasers, Raman spectroscopy, microscopy, nonlinear microscopy, super-resolution microscopy

E-Mail Website
Guest Editor
Department of Soil and Crop Sciences; Texas A&M University; College Station, TX 77843, USA
Interests: ultrafast optics; OCT, multiphoton microscopy; super-resolution imaging, coherent Raman imaging and spectroscopy

Special Issue Information

Dear Colleagues,

This Special Issue, entitled “Optical Techniques and Sensors for Biological and Agricultural Applications”, intends to highlight significant advancements in non-invasive optical analytic techniques and optical sensing applied to biological and agricultural research. Many biological experiments rely on the destructive analysis of samples to investigate morphology, obtain physiological measurements, or determine chemical composition. Non-invasive optical techniques make it possible to measure how these properties can change over time in the same sample, as well as to relate measured properties to future observations.

We are pleased to invite you to submit manuscripts presenting original studies, new methodologies, and concepts, advancing optical imaging and sensing within biological and agricultural research fields. This Special Issue aims to advance the field and promote the application of optical techniques in order non-invasively investigate biological challenges.

We look forward to receiving your contributions.

Dr. Alma Fernández
Dr. Aart J. Verhoef
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • optical coherence tomography
  • Raman spectroscopy
  • coherent Raman imaging
  • microscopy
  • multimodal imaging
  • infrared imaging and spectroscopy

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Published Papers (1 paper)

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Research

11 pages, 3004 KiB  
Article
Emission Integral Effect on Non-Invasive Blood Glucose Measurements Made Using Mid-Infrared Passive Spectroscopic Imaging
by Daichi Anabuki, Shiori Tahara, Hibiki Yano, Akira Nishiyama, Kenji Wada, Akiko Nishimura and Ichiro Ishimaru
Sensors 2025, 25(6), 1674; https://doi.org/10.3390/s25061674 - 8 Mar 2025
Viewed by 676
Abstract
Living bodies emit mid-infrared light (wavelength band centered at approximately 10 µm) with a temperature-dependent intensity. Several studies have shown the possibility of measuring blood glucose levels using the mid-infrared emission of living bodies, and we have demonstrated non-invasive blood glucose measurements through [...] Read more.
Living bodies emit mid-infrared light (wavelength band centered at approximately 10 µm) with a temperature-dependent intensity. Several studies have shown the possibility of measuring blood glucose levels using the mid-infrared emission of living bodies, and we have demonstrated non-invasive blood glucose measurements through distant wrist measurements (wavelength 8–14 µm) by mid-infrared passive spectroscopic imaging. However, it is not clear why blood glucose is detectable, as there is no formula that shows the effect of material thickness and concentration on emission intensity. In this study, we developed a principle for understanding glucose detection by proposing that an emission integral effect underpins the changes in emission intensity with substance thickness and absorption coefficient. We demonstrate the emission integral effect by measuring the spectral radiance of polypropylene with different thicknesses using mid-infrared passive spectroscopic imaging. The simulation results based on the emission integral effect indicate that in living bodies, dilute components such as glucose are easier to identify than components with high concentrations. Mid-infrared passive spectroscopic imaging offers potential innovative solutions for measuring various substances from a distance, with the emission integral effect acting as the basic working principle. Full article
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