LASER RANGEFINDER WITH TOTALIZER OF PROBING RADIATION BEAMS Russian patent published in 2017 - IPC G01C3/08 

FIELD: measuring equipment.

SUBSTANCE: laser rangefinder with the totalizer of the probing radiation beams contains a receiver and a transmitter including an objective and two emitters in the form of semiconductor laser diodes, the output radiation beams of which are polarized and combined with an optical totalizer. The optical totalizer is made in the form of a birefringent plane-parallel plate, the radiating laser diode arrays are fixed to the rangefinder body together with the objective and birefringent plate from one of its faces at the distance a between the radiating areas associated with the thickness h of the birefringent plate by the ratio h=a/tgβ, where β - the refraction angle of the unusual beam. Perpendicular to the optical axis of the objective, a stepped base is mounted, on which laser diodes are fixed, the laser diode corresponding to the ordinary beam of the birefringent plate being mounted on the far-off step of the base and its radiating pad is located on the axis of the objective. The second laser diode, corresponding to the unusual beam, is mounted on the step closest to the lens, the height of which is 0<A*<A_o, where A_o - the astigmatism of the optical system, where the focal length f of the objective lens corresponds to the condition f>g_max/ψ, where g_max - the maximum dimension of the radiating area, ψ - the given maximum divergence of radiation from the first and the second radiating areas in their maximum dimension, and the position of the optical system relative to the emitting areas corresponds to the conditions A - ϕ₂f²/D₀<Δf<ϕ₁f²/D₀, where ϕ₁ and ϕ₂ are the given maximum divergence of the radiation from the first and the second radiating areas in their minimum dimensions, Δf - the focus shift of the optical system relative to the near emitting area to the lens, A=A_o-A* - the residual astigmatism of the optical system.

EFFECT: effective using the total energy of the probing radiation for long-range measurements and corresponding increasing the distance of the rangefinder.

2 cl, 3 dwg