COMPUTER METHOD OF MEASUREMENT OF OPTICAL AND COLOR PARAMETERS OF HUMAN HAIR
DOI:
https://doi.org/10.11603/mie.1996-1960.2022.4.13415Keywords:
computer methods, hair, measurement, absorption, surface-enhanced Raman scattering, melanin, colorimetryAbstract
Background. In the diagnosis and treatment of hair and skin diseases, an important role is played by information about the type and concentration of melanin contained there. This study aimed to use of computer methods to measure the human hair diameter, its optical, color characteristics and assess the content of melanin in it.
Materials and methods. Human hair was placed on the stage of a BioLight 200 optical microscope. Sigeta FMA037 digital attachment was used for photography. With the help of a software application, the image of the hair was decomposed into components of three colors - red, green and blue. Using the least squares method, formulae that describe these dependences are obtained.
Results. The transmittance and reflection of light in these color ranges were measured. Based on the obtained data, the light absorption coefficient in the hair, the actual and virtual parts of the complex refractive index were calculated. Graphs of dependence of these parameters on hair color are constructed. Comparison of the obtained dependences with tabular data on the content of melanin in the hair of different colors made it possible to obtain a mathematical dependence of the content of melanin on the rate of weakening of the hair and its color. A computer method for measuring the optical and color characteristics of hair is proposed, which makes it possible to determine the content of melanin in it.
Conclusions. The method is much simpler than known chemical methods, does not require expensive equipment and takes little time. A computer method for measuring the optical and color characteristics of hair is proposed, which makes it possible to determine the content of melanin in it.
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