Lens for a lighting and/or signaling device of a motor vehicle

A lens for a lighting and/or signaling device of a motor vehicle including a first layer of material, arranged on a first face of which is a second layer of material with additional thickness, said second layer extending partially over the first layer so as to have one end edge overhanging an exposed portion of the first layer of material,

• the exposed portion of the first layer of material, which is not covered by the second layer of material a notch which extends along said end edge of the second layer of material, wherein
• the notch has an inclined surface as an inclined plane, starting substantially from a contact edge of the first layer of material with the end edge of the second layer of material, enabling it to be embedded in the thickness of the first layer of material.