Method of laser welding automotive lights and related automotive lights

摘要

A method of manufacture of an automotive light (4) comprising the steps of: providing a container body (8) delimited by a first perimetral profile (20), providing a lenticular body (24) delimited by a second perimetral profile (28), associating at least partially to each other the respective first and second perimetral profiles (20,28) of the container body (8) and of the lenticular body (24), the contact surface between said perimetral profiles defining a welding interface (48), providing at least one laser emission device (30) emitting a light beam or radiation having a characteristic emission spectrum, wherein the emission device (30) is operatively connected to a first light guide (52) of the emitted light radiation, said first light guide (52) comprising an input (56) and an output (60) of the light radiation, so as to distribute the radiation from such output (60) according to a spatial distribution comprising a plurality of portions or lobes (Li). The method further comprises the step of: providing a second light guide (64) inside the lenticular body (24) adapted to obtain a light guide of the light radiation inside the lenticular body (24), wherein the second light guide (64) is provided with walls capable of satisfying the overall internal reflection condition for at least one portion of the laser radiation defined by at least one first lobe or portion (Li), The method further comprises the step of: suitably arranging with each other the first and the second light guides (52, 64) so as to route at least a first lobe or portion (L1) of the laser radiation coming from the output (60) of the first light guide (52) towards the second light guide (64) of the lenticular body (24), so as to propagate at least one portion or lobe of the laser radiation (Li) inside the second light guide (64) towards the welding interface (48), wherein the container body (8) acts as an absorbing member in relation to the light beam and the lenticular body (24) acts as a transmissive member of the light beam.