Reflectance calibration of multimode optical fiber probes by probe-to-target distance reflectance profile modeling

Naglič, Peter (author), Pernuš, Franjo (author), Bürmen, Miran (author)

Reflectance acquired with a multimode optical fiber probe can be related to optical properties of an investigated turbid medium by utilizing a light propagation model. During this step, a calibration of the light propagation model is required, as the modeled reflectance is normalized to the light energy of the source fiber, while the experimentally acquired reflectance is normalized to a reflective standard. Since currently established calibration methods based on liquid and solid turbid phantoms suffer from drawbacks such as low stability and dependence on other characterization methods, we propose a new method for reflectance calibration that is based on modeling and acquisition of probe-to-target distance reflectance profiles from first surface mirrors. We show that the spectrally resolved calibration factors can be estimated with a repeatability of 2% and agree within 10% with the reference values obtained by using turbid phantoms based on aqueous suspensions of polystyrene microspheres.

• Language: English
• Keywords: optical fiber probes, reflectance calibration, reflectance modeling, Monte Carlo simulations, optical properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 14 str.
• Numbering: Vol. 203, art. 112002
• PID: 20.500.12556/RUL-143806
• UDC: 535:004.94
• ISSN on article: 0263-2241
• DOI: 10.1016/j.measurement.2022.112002
• COBISS.SI-ID: 126338051
• Publication date in RUL: 12.01.2023

Record is a part of a journal

• Title: Measurement : journal of the International Measurement Confederation
• Shortened title: Measurement
• Publisher: Elsevier, International Measurement Confederation
• ISSN: 0263-2241
• COBISS.SI-ID: 25917696

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: optične sonde, kalibracija reflektance, modeliranje reflektance, simulacija Monte Carlo, optične lastnosti