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. 2016 Jun 27;7(7):2837–2848. doi: 10.1364/BOE.7.002837

Fig. 1.

Fig. 1

Relative optical absorption spectra of major chemical components in biological tissue [12, 13]. The vertical dashed lines mark the relatively higher optical absorption of hemoglobin, lipid and collagen at 532, 1220 and around 1310 nm, respectively. a.u. = arbitrary units. Hb. = Hemoglobin.