US 12,222,443 B2
Optical cover for detection device
Meijie Li, Louvain-la-Neuve (BE); Yannick Sartenaer, Vedrin (BE); Quentin Fraselle, Mont Saint Guibert (BE); and Thomas Lambricht, Perwez (BE)
Assigned to AGC GLASS EUROPE, Louvain-la-Neuve (BE)
Appl. No. 17/278,948
Filed by AGC GLASS EUROPE, Louvain-la-Neuve (BE)
PCT Filed Sep. 25, 2019, PCT No. PCT/EP2019/075795
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2020/064794, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 18197023 (EP), filed on Sep. 26, 2018.
Prior Publication US 2022/0050181 A1, Feb. 17, 2022
Int. Cl. G01S 7/00 (2006.01); G01S 7/481 (2006.01); G01S 7/497 (2006.01); G01S 17/10 (2020.01)
CPC G01S 7/4813 (2013.01) [G01S 7/497 (2013.01); G01S 17/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A detection device comprising:
a. an optical device comprising a light source and a light sensitive element which are optically decoupled inside the detection device, the optical device being a LIDAR sensing device,
b. a protective housing enclosing the optical device, and comprising an optical cover having one internal surface facing the optical device and an external surface opposite to the internal surface,
(i) the optical cover being transparent at an operating wavelength of the optical device, and
(ii) the optical cover comprising at least 2-separate apertures, a first aperture facing the light source and a second aperture facing the light sensitive element;
wherein the optical cover is made in one piece comprising diffusing, absorbing, multilayer elements, and/or wavelength-changing elements or a combination thereof, placed between the first and the second apertures in an optical decoupling zone outside a field of view of the light source and the sensitive element to avoid stray light travelling from the light source to the sensitive element within the optical cover.