Table 2.

Summary of the average absorption and reduced scattering coefficients (${\mathrm{mm}}^{-1}$), calculated TMFP (mm) and percentage transmission at depths corresponding to the average epidermis (0.1 mm) and the combined epidermis and dermis (1.93 mm). Data are given at wavelengths important to OCT, PDT, and medical wearables.

Coefficient	FST	Wavelength (nm)
		410	620	660	780	940	1000	1300
Average ${\mu }_a$ (${\mathrm{mm}}^{-1}$)	FST I–II	0.975	0.041	0.031	0.022	0.032	0.038	—
	FST III–IV	1.396	0.061	0.043	0.032	0.037	0.054	0.091
	FST V–VI	0.675	0.160	0.120	0.058	0.047	0.055	—
Average ${\mu }_s^{\prime }$ (${\mathrm{mm}}^{-1}$)	FST I–II	2.275	1.427	1.301	1.085	0.873	0.729	—
	FST III–IV	2.065	2.086	2.003	1.609	1.253	1.243	1.111
	FST V–VI	1.546	1.878	1.781	1.561	1.212	1.389	—
TMFP (mm)	FST I–II	0.44	0.7	0.77	0.92	1.14	1.37	—
	FST III–IV	0.48	0.48	0.5	0.62	0.8	0.8	0.9
	FST V–VI	0.65	0.53	0.56	0.64	0.83	0.72	—
% Transmission at 0.1 mm	FST I–II	72.55	86.35	87.52	89.52	91.35	92.62	—
	FST III–IV	70.74	80.68	81.5	84.87	87.9	87.84	88.67
	FST V–VI	80.08	81.56	82.69	85.06	88.17	86.55	—
% Transmission at 1.93 mm	FST I–II	0.19	5.88	7.64	11.8	17.44	22.75	—
	FST III–IV	0.13	1.59	1.93	4.21	8.29	8.18	9.83
	FST V–VI	1.38	1.96	2.55	4.4	8.81	6.16	—