Both the integrating sphere (IS) method and the diuse video re
ectometry (VR) method are
used to measure the optical properties of turbid media, and the results are compared. Target
samples are made using absorbers and scatterers of known optical prop...
Both the integrating sphere (IS) method and the diuse video re
ectometry (VR) method are
used to measure the optical properties of turbid media, and the results are compared. Target
samples are made using absorbers and scatterers of known optical properties mixed with pure
water. The VR method measures the absorption coecient with high accuracy even when the
absorption coecient is as low as that of water. On the other hand, the IS method signicantly
overestimates the absorption coecient depending on the optical penetration depth. The IS method
seems to estimate the scattering coecient with better accuracy than the VR method does. The
results show that the IS method has to be used with much care, especially when the absorption
coecient is low and the penetration depth is high.