OPTICAL SYSTEM WITH AN ELECTROCHEMICAL FUNCTIONAL DEVICE HAVING ELECTRICALLY CONTROLLABLE OPTICAL AND/OR ENERGETIC PROPERTIES AND A COATING FOR CONTROLLING COLOUR IN REFLECTION, AND ASSOCIATED PROCESSES

摘要

The invention relates to an optical system (40) comprising: - an optical assembly (50) comprising a glazing-function substrate (1) equipped with two opposite main faces (11, 12) and an electrochemical functional device having electrically controllable optical and/or energetic properties that is formed on one (11) of these two main faces, this optical assembly (50) having an initial colour state with an initial colour value (L*ui; a*ui; b*ui) in reflection at a first angle of refraction (u) on the side of the substrate (1), - a coating (3) that controls colour in reflection, which is formed on the other main face (12) of the substrate, and which forms an external face (41) of said optical system (40), said coating being such that the optical system (40) has a final colour state with a final colour value (L*uf; a*uf; b*uf) in reflection at the first angle of reflection (u), this final colour state being closer than the initial colour state to a reference colour state having a reference colour value (L*uref; a*uref; b*uref) at said first angle of reflection (u), this corresponding to a variation ΔCu in colour distance (Cui, Cuf) between the initial colour value and the reference value, on the one hand, and between the final colour value and the reference colour value, on the other hand, smaller than 0 at said first angle of reflection (u).