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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:29 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Solid State Physics and Materials Science, Optics, Spectroscopy, Plasma and Lasers
Title:
Measurements of the absorption and transmission coefficient of the optical cleaning tissues in visible and near infrared.
Authors:
Septimiu BALASCUTA (1), Viorel NASTASA (1)
Affiliation:
1) IFIN-HH, ELI-NP department, 077125, Magurele, Romania
E-mail
septimiu.balascuta@eli-np.ro
Keywords:
spectroscopy, photometry, scattering, absorption, transmission, interpolation
Abstract:
The transmission and the optical density of a stack of paper lens tissues were measured at four wavelengths (405 nm, 535 nm, 632 nm and 830 nm) using four laser diodes and a standard photodiode power sensor connected to an optical power meter console. The measurements were performed for 10 distances between the stack of paper tissues and the photodiode. A nonlinear fitting model of the logarithm of the radiation power on the number of paper tissues was computed for each distance. The wavelength dependence of the absorption coefficient was extracted from the spectra recorded with a spectrophotometer between 300 nm and 1000 nm.
References:
[1] L. A. Dombrovsky, “A new method to retrieve spectral absorption coefficient of highly-scattering and weakly-absorbing materials,” Journal of Quantitative Spectroscopy and Radiative Transfer, 172, 75 –82, (2016).
[2] Dirk Poelman, and Philippe Frederic Smet, “Methods for the determination of the optical constants of thin films from single transmission measurements: a critical review”, Journal of Physics D: Applied Physics, vol. 36 , nr. 15, 1850 (2003).
Acknowledgement:
Research grant ELI-11/1-10-2020
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