Table 2. Summary of the literature studies on the optical properties of cartilage. ${\mu }_a$ , absorption coefficient; ${\mu }_s^{\mathrm{\prime }}$ , reduced scattering coefficient; g, scattering anisotropy factor.

Study	Year	Species	Tissue	Optical property	Spectral band	Measurement setup	Computational method
Beek et al. [19]	1997	Rabbit	Articular cartilage	${\mu }_s^{\mathrm{\prime }},g,{\mu }_a$	632.8 nm	Double integrating sphere	Inverse adding-doubling
Ebert et al. [20]	1998	Equine	Articular cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	300-850 nm	Single integrating sphere	Kubelka-Munk theory
Descalle et al. [21]	1998	Porcine	Articular cartilage, ligament	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	351, 365 nm, 440-800 nm	Fiberoptic setup	Diffuse approximation theory
Madsen et al. [22]	1999	Porcine	Nasal cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	632.8 nm	Single integrating sphere	Monte Carlo simulation
Youn et al. [23]	2000	Porcine	Nasal cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	400-1400 nm	Single integrating sphere	Inverse adding-doubling
Reuter et al. [24]	2013	Porcine	Articular cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	900-1700nm	Single integrating sphere	Kubelka-Munk theory
Kafian-Attari et al. [25]	2020	Bovine	Articular cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	600-2500 nm	Single integrating sphere	Inverse adding-doubling
Bergmann et al. [26]	2021	Porcine	Ear cartilage	${\mu }_s^{\mathrm{\prime }},{\mu }_a$	400-1400 nm	Single integrating sphere	Monte Carlo simulation