Figure 5.

RS-OCT of in-vivo human skin on the palm of the hand. (a) OCT image. A hyper-reflective feature that is likely a sweat gland (SG) is seen within the stratum corneum (SC). Red area indicates location of Raman spectrum. Axial scale assumes n_skin = 1.38.²⁷ (b) Raman spectrum of skin. The prominent skin peaks are identified (arrows) at 936 cm⁻¹ (C-C backbone of collagen protein), 1003 cm⁻¹ (phenylalanine), 1280 cm⁻¹ (amide III), 1335 cm⁻¹ (C-H), 1440 cm⁻¹ (CH_x), and 1660 cm⁻¹ (amide I). (Color online only.)