Abstract: The invention concerns a support designed for observing between intersecting polarizers an object located in its vicinity in a medium (3) of index n0 with incident convergent incoherent illumination under an angle ?0 at a wavelength ?. Said support comprises a substrate (1) with complex refractive index n2 and a layer (2) of refractive index n1 and thickness e1. According to the invention, the value of the thickness e1 of the layer (2) is at ±2% such that d2?/de21 lnIóI2=0 with Ó=Ó01+Ó12 (1+?01)e(?2j?1)+Ó01 ?12e (?4j?1)/1+r01(p)+r12(p)e(?2j?1))(1+r01(s)r12(s)e(?2j?1)). The invention also concerns observation devices incorporating such a support.

Abstract: A device for ellipsometric two-dimensional display of a sample placed in an incident medium, observed between an analyser and a polarizer intersected by convergent light reflection, wherein the ellipsometric parameters of the assembly formed by the sample and a substrate whereon it is placed, are used. The substrate comprises a support and a stack of base layers and its ellipsometric properties are known. The ellipsometric properties of the substrate are such that variations of the sample ellipsometric parameters are displayed with contrast higher that the contrast produced in the absence of the substrate. The invention also concerns a display method and an ellipsometric measurement method with spatial resolution.

Abstract: A glazing having a hydrophobic anti-frost surface formed from a composition of at least organosilane with a long aliphatic hydrocarbon chain which may or may not be saturated in a non-polar solvent system containing a non-polar hydrocarbon solvent and a small amount of a chlorinated solvent or a mixture of chlorinated solvents.

Abstract: A support (56) is suitable for holding a substrate (10) horizontal, said substrate having a drop of liquid placed thereon. A source of light (74) associated with a collimator (78) forms a primary beam of parallel light which is directed perpendicularly (86) to the substrate. A receiver surface (126, 128) having a known geometry and placed in a known position relative to the substrate intercepts a secondary beam (124) produced by interaction between the primary beam and the drop and the substrate. The value of the contact angle between the drop and the substrate may be deduced from the illuminated zone on said receiver surface.