Optical article having a reflective coating with high abrasion-resistance

An optical article comprising a substrate having at least one main face coated with a reflective coating in the visible range comprising a stack of at least one high refractive index layer having a refractive index greater than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less, wherein:

• a) The reflective coating comprises at least four layers and
• The outermost low refractive index layer of the reflective coating has a thickness Tho of at least 10 nm,
• The outermost high refractive index layer of the reflective coating has a thickness of 75 nm or less,
• The penultimate low refractive index layer of the reflective coating has a thickness Thp of at least 150 nm,
• The penultimate high refractive index layer of the reflective coating has a thickness ranging from 5 nm to 90 nm,
• Tho/4+Thp≥200 nm, or
• b) The reflective coating has three layers and
• The outermost layer of the reflective coating is a low refractive index layer having a thickness of 70 nm or less,
• The penultimate layer of the reflective coating is a high refractive index layer having a thickness of 50 nm or less,
• The first layer of the reflective coating is a low refractive index layer having a thickness of at least 200 nm.