LASER FIRE SIMULATOR Russian patent published in 2017 - IPC F41G3/26 

FIELD: physics.

SUBSTANCE: laser fire simulator contains an optically coupled laser, a transparency and a lens. The transparency is installed in the focal plane of the lens and has N zones, where N is not less than 2, with dimensions of r₁<r₂<…<r_N and with the transmission coefficients in the zones of τ₁>τ₂>τ_i…>τ_N, the centres of these zones are aligned or offset from each other vertically. The transparency is made in the form of a diffractive optical element (DOE) with alternating strokes with maximum and minimum transmittance. Herewith the parameters of the strokes satisfy the conditions , where d_i - the width of strokes with minimum transmission in the i-th zone; τ_i - the transmittance coefficient in the i-th zone; T is the period of the DOE strokes, T=λ_min/ϕ, where λ_min - the minimum working laser wavelength; ϕ - the aperture lens angle.

EFFECT: increasing the technology of the simulator and increasing the accuracy of fire simulating.

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