METHOD OF LIMITING INTENSITY OF LASER RADIATION Russian patent published in 2014 - IPC G02B26/02 G02F1/355 

FIELD: physics.

SUBSTANCE: in the method of limiting intensity of laser radiation, which involves feeding laser radiation flux to the input of a device which limits laser radiation power, the laser radiation flux is fed by successively transmitting the laser radiation flux through a first stage mounted at the input of an optical system in the focal plane of two interfaced lenses, and then through a second stage. The first stage is characterised by variable transmission factor of laser radiation, which is a function of intensity of the laser radiation flux, and includes a laser radiation transmitting cell which is in form of a glass cuvette filled at pressure of not more than 5 atm with an inert gas, e.g. xenon, which does not have absorption bands in the operating spectral region. The second stage is a nonlinear limiter and includes an element which limits laser radiation power, which is in form of an optically transparent matrix, e.g. a polymer film or a glass plate, with embedded nano-dispersed carbon-containing filler. After the second stage, the laser radiation flux is directed into a light sensor which detects the value of the converted laser radiation flux.

EFFECT: improved protection of optical systems by limiting input high-power laser radiation, reduced losses for protection from weak laser radiation flux.

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