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Journal of Biomedical Optics • Open Access

Simple and effective method for measuring translucency using edge loss: optimization of measurement conditions and applications for skin
Author(s): Kenichiro Yoshida; Nobutoshi Komeda; Nobutoshi Ojima; Kayoko Iwata

Paper Abstract

We have developed a simple and effective method for everyday measurement of translucency with a handy spectral reflectometer using edge loss. Edge loss can be used to quantify the translucency index in terms of changes in reflectance under two types of measurement conditions. Here, a measurement condition represents the pairing of an illumination area and a measurement area. As a measure of the degree of lateral spread of reflected light, the translucency index can influence the appearance of human skin because this index represents eventual translucency. First, we estimated how edge loss changes when measurement conditions are varied. We then selected the combination of two measurement conditions of large and small edge loss to minimize errors. Finally, we estimated actual skin translucency changes before and after treatments comprising acetone-ether immersion and ultraviolet irradiation. The results were qualitatively consistent with the expectations under variations in absorbance and scattering capacity, indicating the effectiveness of this method in evaluating translucency. This method allows simultaneous measurement of translucency and reflectance as a spectrum, and also appears applicable for daily use, although common optical parameters cannot be derived using this method alone.

Paper Details

Date Published: 1 November 2011
PDF: 9 pages
J. Biomed. Opt. 16(11) 117003 doi: 10.1117/1.3646208
Published in: Journal of Biomedical Optics Volume 16, Issue 11
Show Author Affiliations
Kenichiro Yoshida, KAO Corp. (Japan)
Nobutoshi Komeda, KAO Corp. (Japan)
Nobutoshi Ojima, KAO Corp. (Japan)
Kayoko Iwata, KAO Corp. (Japan)

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