Skin reflectance spectra

According to earlier skin reflectance modeling, there were skin reflectance spectra calculated for skin with most common properties: Melanin (volume fraction 2% in Epidermis); hemoglobin HbO2 and Hb (150 g Hb/liter ) and Thickness of collagen tissue in papillary dermis about 0.1mm.

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What are the parts of this spectrum? This spectrum can be exploded into several distinct spectra’s: Epidermis, Hemoglobin, There are also spectra’s of water and collagen substances, but they don’t play the leading role in our wavelength interval.

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 As you can see melanin in epidermis absorbs the most of blue light ~470nm; hemoglobin absorbs green light ~252nm, and red light ~640nm and infrared 850 are used to define papillary dermis thickness because these wavelengths are less absorbed by melanin and hemoglobin.

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