Optical element for modifying the distribution of a light beam, for a motor vehicle headlight
AssigneeAml Systems
InventorsHassan Koulouh, Anderson Noronha
Life of this patent
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Abstract
The invention relates to an optical element including a resin body having a functional surface covered with a reflective coating capable of reflecting light beams, the reflective coating including a copper layer covering at least the functional surface, a nickel layer covering the copper layer, and a chromium layer covering the nickel layer.
Claims12
A movable optical element that is intended to modify a distribution of light beams for a motor vehicle headlight, wherein the movable optical element comprises a resin body having a functional surface covered with a reflective coating capable of reflecting the light beams, the resin body is molded with resin, and the reflective coating comprising:
- a copper layer covering the functional surface at least in part,
- a nickel layer covering the copper layer, and
- a chromium layer covering the nickel layer;
- and the nickel layer comprises:
- a semi-bright nickel underlayer covering the copper layer,
- a high-sulfur nickel underlayer covering the semi-bright nickel underlayer,
- a bright nickel underlayer covering the high-sulfur nickel underlayer,
- a matte nickel underlayer covering the bright nickel underlayer.
A headlight for a motor vehicle, comprising at least one reflector and at least one light source that is capable of emitting at least one light beam, the reflector having the shape of a portion of a semi-ellipsoid extending above a plane of symmetry of the ellipsoid, and the light source being positioned on an axis of symmetry of the ellipsoid, the headlight further comprises a movable optical element, and the movable optical element that is intended to modify a distribution of light beams for a motor vehicle headlight, wherein the movable optical element comprises a resin body having a functional surface covered with a reflective coating capable of reflecting the light beams, the resin body is molded with resin, and the reflective coating comprising:
- a copper layer covering the functional surface at least in part, a nickel layer covering the copper layer, and a chromium layer covering the nickel layer;
- the movable optical element being designed to be movable in order to modify a distribution of the light beam emitted by the light source and reflected by the reflector.
A method for manufacturing a movable optical element that is intended to modify a distribution of light beams, wherein the movable optical element comprises a resin body having a functional surface covered with a reflective coating capable of reflecting the light beams, and the resin body is molded with resin, and the reflective coating comprising:
- a copper layer covering the functional surface at least in part, a nickel layer covering the copper layer, and a chromium layer covering the nickel layer;
- wherein the method comprises the following steps:
- a step of forming a resin body having a functional surface;
- a first step of covering at least a portion of the functional surface with a copper layer;
- a second step of covering the copper layer with a nickel layer;
- a third step of covering the nickel layer with a chromium layer.
Dependencies are inferred from the claim text.