Optical method and device for measuring the distance from an obstacle

摘要

An optical device (1) to measure the distance between the device itself and an obstacle/object (5) comprising a unit to emit radiation (2) including an aligned series of sources of radiation (3) coupled to a series of arrangements of lenses (4) to guide the radiation emitted by the sources (3). An optical acquisition unit (8) comprising a matrix of photodetectors has a field of view (7) including the scene in front of the optical device (1) and including the obstacle (5). The signals leaving the acquisition unit (8) are sent to a control and processing unit (9) for calculation of the distance from the obstacle. The unit for the emission and conformation of the radiation emits a beam having a transverse section of a form elongated along an axis that is progressively rotated for transverse sections of the beam progressively more distant from the emission unit. In this manner, the distance of the obstacle may be calculated on the basis of the angular position of the section of the beam intercepted by the obstacle, as acquired by said acquisition unit (8).