Experimental Study on Light Scattering of High Concentration Suspension

To understand the optical properties of living tissue in the NIR range, it appeared informative to investigate the scattering properties of high concentration particle suspension. We measured the angular light scattering of aqueous suspension of 3.5 μmφ polystyrene particles contained in a 60 μm thick cuvette up to 50% volume concentration at 805 nm wavelength using a goniophotometer. We found that the discrepancy between the measurement and the Monte Carlo simulation becomes larger with increased concentration, which is attributable to the phase function change as well as the scattering coefficient change.