IP Library › Granted Patent US 12691526
Granted Patent B2
US 12691526 · App. 16/513,255 · Granted Jul 28, 2026

Method and device for producing recesses in the coating of transparent components of a lighting device

Inventor: Alexander Stammeier (Rietberg, DE)
Assignee: Hella GmbH & Co. KGaA
B23K26/362B23K26/0665B23K26/073B23K26/082B23K26/40B23K26/57
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Quick Facts
Patent No.
US 12691526
App. No.
16/513,255
Granted
Jul 28, 2026
Kind
B2
Abstract

A method for producing recesses in a coating of transparent components of a lighting device, wherein the recess is produced by locally removing the coating using a laser beam. A first coating is removed on a front face of the component using a laser beam which is directed from the front face of the first coating onto the component, and a second coating is removed on an opposite rear face of the component using the same laser beam which is additionally directed from the front face onto the component and removes the second coating by passing through the transparent component.

Claims (14)

1 . A method, comprising:

producing recesses in a coating, the coating including a first coating and a second coating, of a transparent frame surrounding a light guide body of a vehicle headlight, the coating having been deposited on the frame, the recesses being produced by locally removing the coating using a laser beam generated by a single laser beam source, said producing recesses comprising:

removing the first coating on a front face of the frame using the laser beam that is directed from a front face of the first coating onto the frame to produce recesses in the first coating;

removing the second coating on an opposite rear face of the frame using the laser beam that is subsequently directed from the front face of the first coating onto the frame and removes the second coating by passing through the frame by subsequently directing the laser beam through recesses formed in the first coating; and

adjusting the distance of the laser beam source to the frame such that the laser beam is focused on the front face of the frame for removing the first coating and is focused on the rear face of the frame for removing the second coating,

wherein the laser beam is deflected using a scanner system so that recesses are produced on the front and rear face of the frame,

wherein the first coating and the second coating are removed in a single clamping of the frame,

wherein the laser beam is not absorbed by a material of the transparent frame and the laser beam is only absorbed by the coating, and

wherein the recesses produced on the front and rear face of the frame are produced with a same shape.

2 . The method according to claim 1 , wherein, to remove the first coating, the laser beam is focused on the front face of the frame.

3 . The method according to claim 1 , wherein, to remove the second coating, the laser beam is focused on the rear face of the frame.

4 . The method according to claim 1 , wherein the laser beam is generated by a laser beam source which generates the laser beam with a wavelength that is transparent to the frame.

5 . The method according to claim 1 , wherein a material of the coating is different from a material of the transparent frame.

6 . The method according to claim 1 , wherein the coating is not transparent.