Quantitative Morphological and Biochemical Studies on Human Downy Hairs using 3-D Quantitative Phase Imaging

TL;DR

This paper employs advanced 3-D quantitative phase imaging to non-invasively analyze the morphological and biochemical properties of human downy hairs, including effects of hydrogen peroxide treatment.

Contribution

It introduces a novel application of 3-D quantitative phase imaging for detailed analysis of human downy hairs, providing new insights into their biochemical and morphological characteristics.

Findings

Quantified biochemical and morphological parameters of downy hairs.

Demonstrated effects of hydrogen peroxide on hair properties.

Non-invasive measurement technique for hair analysis.

Abstract

This study presents the morphological and biochemical findings on human downy arm hairs using 3-D quantitative phase imaging techniques. 3-D refractive index tomograms and high-resolution 2-D synthetic aperture images of individual downy arm hairs were measured using a Mach-Zehnder laser interferometric microscopy equipped with a two-axis galvanometer mirror. From the measured quantitative images, the biochemical and morphological parameters of downy hairs were non-invasively quantified including the mean refractive index, volume, cylinder, and effective radius of individual hairs. In addition, the effects of hydrogen peroxide on individual downy hairs were investigated.