DEVICE FOR EVALUATING THE STATE OF WETTING OF A SURFACE, EVALUATION METHOD AND ASSOCIATED INDICATION DEVICE

摘要

The invention relates to a device (2) for evaluating the state of wetting of a surface (8), comprising an emitter (4) suitable for emitting an incident beam (F, F1, F2) onto the surface (8) and a single means (12) for receiving the beam reflected by said surface (8). The device comprises: polarization means (10, 13, 14), which include first (13) and second (14) polarization zones suitable for polarizing first (F1) and second (F2) parts of the beam along first and second polarization directions; and evaluation means (28) capable of calculating a polarization ratio, namely the ratio of the polarization of the first part of the reflected beam to the polarization of the second part of the reflected beam in order to evaluate the state of wetting of the surface (8). The invention also relates to an evaluation method and to an associated indication device.