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Proceedings Paper

Double-integrating-sphere system to measure the optical properties of turbid samples
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Paper Abstract

We have assembled a double-integrating-sphere system to measure the absorption (μa) and reduced scattering (μ's) coefficients of materials with high turbidity. We have employed the Inverse Adding-Doubling (IAD) algorithm to access these optical properties. The experimental system is a homemade setup assembled with broadband sources and 3D printed spheres, equipped with an optical fiber bundle for excitation and a spectrometer for detection. We have used a reference phantom (polyurethane plus Titanium Dioxide) with known optical properties at 633 nm (μa= 0.0019 mm-1 and μ's= 0.477 mm-1 ) to validate the system. The system can reliably measure the optical properties of turbid samples from 400 to 950 nm with one of the experimental setups and from 950 to 1650 nm with a second experimental setup.

Paper Details

Date Published: 20 February 2020
PDF: 5 pages
Proc. SPIE 11238, Optical Interactions with Tissue and Cells XXXI, 1123811 (20 February 2020); doi: 10.1117/12.2541748
Show Author Affiliations
Jaqueline R. S. Fernandes, Univ. de São Paulo (Brazil)
Luismar B. Cruz Junior, Univ. de São Paulo (Brazil)
Luciano Bachmann, Univ. de São Paulo (Brazil)

Published in SPIE Proceedings Vol. 11238:
Optical Interactions with Tissue and Cells XXXI
Bennett L. Ibey; Norbert Linz, Editor(s)

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