Method for measuring the optical quality of a given region of a glazing unit and associated measuring device

Abstract

One aspect of the invention relates to a method for measuring the optical quality of a given region (13) of a glazing unit (10) of a road or rail vehicle, which region is intended to be positioned in the optical path of an image acquisition device, the measuring method being implemented by a measuring device (40) comprising an emitter (41) and a wavefront analyzer, the measuring method comprising: - a step of emitting, with the emitter (41), a beam of light rays in the direction of said given region (13), - a step of analyzing, with the wavefront analyzer, the wavefront of the light rays transmitted by said given region (13), comprising: - a sub-step of generating a wavefront error map, - a sub-step of determining, on the basis of the wavefront error map, at least one optical defect map, of any optical defects present in said region (13) of the glazing (10).

Description

technical field [0001] The technical field of the invention is that of intelligent systems for driving assistance. [0002] The invention relates to a measuring method and a measuring device for measuring the optical quality of a given area of ​​a glazing of a transport vehicle, which is intended to be arranged in the optical path of an image acquisition device of an intelligent driving assistance system middle. Background technique [0003] Transport vehicles, especially road vehicles, are increasingly equipped with intelligent driver assistance systems (ADAS, "advanced driver assistance system", Advanced Driver Assistance System). [0004] Among other functions, these on-board systems can provide information in real time (especially about road traffic conditions), detect and predict possible threats from the vehicle's external environment, or assist the driver in certain difficult maneuvers, such as Pass other vehicles or stop. To this end, these systems include a numbe...

AI Technical Summary

Problems solved by technology

Although this measurement technique offers high repeatability, it cannot accurately measure the optical quality of glazing

In fact, this technique does not accurately identify and quantify the optical defects that degrade the quality of the image captured by the image acquisition device, it only makes it possible to determine the distortions caused by the glazing

In addition, this method cannot measure the optical quality of the reduced area of ​​the glazing, especially if the opaque elements (such as enamelled elements) surrounding the area become a source of optical distortion in its vicinity

In fact, the method has a spatial resolution such that the measurement of the optical quality is limited to a part of the surface of the given area

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