Fig. 1. Geometry for defining the volume scattering function^[2]

Fig. 2. Schematic diagram of scattering by a sphere

Fig. 3. Schematic diagram (a) and physical model (b) of the system for measuring volume scattering function of water approaching to 180°

Fig. 4. Sectional view of off-axis parabolic mirror

Fig. 5. Correspondence between CMOS camera pixel coordinates and particle scattering angle of measurement system

Fig. 6. Minimum normalized scattering phase function of Submicron (a) and Micron (b) polystyrene standard particles

Fig. 7. Measured value and theoretical value of volume scattering function of 1 μm (a) and 10 μm (b) size standard particle (azimuth Φ=90°)

Fig. 8. Measured value and theoretical value of volume scattering function of 1 μm (a) and 10 μm (b) size standard particle (azimuth Φ=0°)