DISTANCE MEASURING DEVICE Russian patent published in 2019 - IPC G01C3/08 

FIELD: physics.

SUBSTANCE: invention relates to laser engineering, namely to laser range-finding devices with misaligned receiving and transmitting channels. Device comprises a transmitting channel for forming a beam of probing radiation and directing it to a target, which includes a laser emitter and a collimating output lens which is optically connected thereto, as well as a receiving channel for receiving a target reflected by the target, which includes a photodetector and an input lens which is optically connected to it. Optical axis of the receiving channel is turned towards the transmitting channel at an angle such that at the limit range of measurements the visual field of the receiving channel covers the laser spot by touching the inner edge of the laser spot with its outer edge. Turn angle of optical axis of receiving channel is

where γ is the angle of rotation of the optical axis of the receiving channel; D₂ is input lens pupil diameter; t is minimum distance between collimating output lens and input lens; L is maximum (limit) measurement distance; ω₁ and ω₂ are angles determined from divergences 2ω₁ and 2ω₂ laser radiation and receiving channel field of view, respectively.

EFFECT: reduced size of shadow zone without increase of visual field of receiving channel and without use of additional elements.

1 cl, 3 dwg