FIELD: physics.
SUBSTANCE: apparatus has a laser which is connected to an optical fibre carrying the laser radiation. A waveguide installation placed in the analysed medium is freed from the shell in order to provide contact between radiation and nanoparticles suspended in the liquid. Radiation scattered on nanoparticles is carried by a non-homogeneous wave which exponentially decays from the lateral surface of the optical waveguide. The radiation is collected on a photodetector which has a signal pre-processing unit. A version of the apparatus has a mirror with an opening for fibre, inclined at an angle to the fibre passing through the opening.
EFFECT: high scattering efficiency.
7 cl, 6 dwg
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