US 12,031,812 B2
Method and system for determining a three-dimensional definition of an object by reflectometry
Tom Reichert, Differdange (LU); and Gérard Baseotto, Marly (FR)
Assigned to VIRELUX Inspection Systems Sàrl, Differdange (LU)
Appl. No. 17/769,543
Filed by VIRELUX Inspection Systems Sàrl, Differdange (LU)
PCT Filed Oct. 16, 2020, PCT No. PCT/EP2020/079227
§ 371(c)(1), (2) Date Apr. 15, 2022,
PCT Pub. No. WO2021/074390, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 101454 (LU), filed on Oct. 16, 2019.
Prior Publication US 2024/0125594 A1, Apr. 18, 2024
Int. Cl. G01B 11/25 (2006.01); G01B 5/00 (2006.01); G01B 11/16 (2006.01); G01B 11/24 (2006.01); G01N 21/88 (2006.01)
CPC G01B 11/2545 (2013.01) [G01B 5/0025 (2013.01); G01B 11/167 (2013.01); G01B 11/2441 (2013.01); G01N 2021/8864 (2013.01); G01N 2201/0631 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for scanning an outer surface of a three-dimensional object, the outer surface being reflective, said method comprising the following steps:
(a) projecting a light pattern on the object with a relative movement between the light pattern and the object;
(b) recording with cameras images of the light pattern reflected by the outer surface during the relative movement; and
(c) processing the recorded reflection images by identifying the outline of the light pattern and determining from the outline characteristics of the outer surface;
wherein the light pattern comprises at least one homogenously illuminated strip extending transversally to a direction of the relative movement with at least one border with a non-straight profile so as to form a non-constant width of the strip; and
wherein in step (c) the speed of the relative movement is taken into account for determining a three-dimensional definition of the outer surface.