Three classes of parameters can be obtained from the different optical methods for nondestructive testing of 3D disperse systems with nano- and microparticles. These optical methods are refractometry, absorbance, fluorescence, light scattering (integral and differential, static and dynamic, unpolarized and polarized). Each of 3D disperse system can be characterized by unique vector in the N-dimensional space of the second-class optical parameters. The phenomenon can be used for elaboration of on-line control of systems with nano- and / or microparticles in the water or air medium.