RU2016104729A - Laser range meter with optical combiner - Google Patents

Claims (1)

A laser range meter with an optical adder comprising a receiving device and a transmitting device including a lens and two emitters in the form of semiconductor laser diodes, the output radiation beams of which are polarized mutually perpendicularly and aligned using an optical adder in the form of a birefringent plane-parallel plate, the laser diodes mounted on the side its face opposite the lens, in a plane perpendicular to the optical axis of the lens, characterized in that the birefringent the wiper plate is inclined relative to the line connecting the emitting areas of the laser diodes at an angle γ = γ _n + γ _s , satisfying the condition

where γ _n is the nominal value of the angle of inclination of the plate; γ _s is a constant correction; X _o (γ) and X _e (γ) - the longitudinal position of the foci, respectively, for the ordinary and extraordinary beam of rays; ΔX _max - maximum permissible distance between focal planes; Y _o (γ) and Y _e (γ) are the transverse positions of the foci, respectively, for an ordinary and extraordinary beam of rays; F is the focal length of the lens, with X _o (γ) = F + Y _o / tgγ; X _e (γ) = F + h⋅tgβ / Sinγ + Y _e / tgγ; Y _o = h _o * Sin (γ-γ * _o ); Y _e = h _e * Sin (γ- (γ * _e + β)); h _o * = h / Cos (γ _o *); h _e * = h / Cos (γ _e * + β); h is the thickness of the birefringent plate;

;

; n _o and n _e are the refractive index of the ordinary and extraordinary ray, respectively, and the distance b between the emitting areas of the laser diodes corresponds to the condition;

; ΔY _max = Δϕ _max F; Δϕ _max - the maximum width of the radiation pattern of the probe radiation.