Examination of refractive index of human epidermis in-vitro and in-vivo

摘要

The refractive indices of different kinds of tissues are difficult to obtain and not easily available.In this paper,with laser as a light source,the refractive index of human epidermis in both in-vito and in-vivo examinations are determined using a simple and direct method.By applying the theory of total internal reflection,measurements are carried out using a semi-cylindrical lens skin's refractive index is independent of age,sex and race.However,n is larger in the palm epidermis compared to addominal epidermis.In general,n increases with shorter wavelengths.