Abstract: An optical element, which is transparent, for a motor vehicle, including at least one transparent first layer containing a polymer material and at least one second layer including at least silicon, titanium and oxygen. The optical element has a surface roughness defined by a mean square deviation Rq greater than or equal to 20 nm.

Abstract: A transparent optical element for a motor vehicle includes at least one first transparent layer of a polymer material. The optical element further has at least one second transparent layer including at least silicon, titanium, oxygen and nitrogen.

Abstract: A method for moulding an optical component by a mould, at least one moulding station, and at least one cooling station including a cooling space, the method including: a step of moulding a moulded component in a moulding station, a step of transferring this component from this moulding station into the cooling space, keeping the moulded component facing at least one of the mould parts, a step of cooling the moulded component by sending a cooling fluid between the moulded component and the walls of the cooling space, the moulded component being kept some distance from these walls.

Abstract: An optical assembly of a light-emitting module, especially of a lighting and/or signalling module, for a motor vehicle, including an optical element, a frame; the optical element being overmoulded on the frame, the frame being shaped so as to make a mechanical attachment between the frame and the optical element following the overmoulding of the optical element on the frame.

Abstract: An optical element, which is transparent, for a motor vehicle, including at least one transparent first layer containing a polymer material and at least one second layer including at least silicon, titanium and oxygen. The optical element has a surface roughness defined by a mean square deviation Rq greater than or equal to 20 nm.

Abstract: A method for moulding an optical component by means of a mould, at least one moulding station, and at least one cooling station including a cooling space, the method including: a step of moulding a moulded component in a moulding station, a step of transferring this component from this moulding station into the cooling space, keeping the moulded component facing at least one of the mould parts, a step of cooling the moulded component by sending a cooling fluid between the moulded component and the walls of the cooling space, the moulded component being kept some distance from these walls.

Abstract: An optical assembly of a light-emitting module, especially of a lighting and/or signalling module, for a motor vehicle, including an optical element, a frame; the optical element being overmoulded on the frame, the frame being shaped so as to make a mechanical attachment between the frame and the optical element following the overmoulding of the optical element on the frame.

Abstract: A transparent optical element for a motor vehicle includes at least one first transparent layer of a polymer material. The optical element further has at least one second transparent layer including at least silicon, titanium, oxygen and nitrogen.