Anti-reflective coatings for automotive applications
By coating multiple dielectric layers on the substrate, the problem of inaccurate detection by LiDAR sensors caused by the reflection of infrared radiation from the substrate is solved, achieving high transmittance of infrared radiation, which is suitable for windshields of vehicles and LiDAR systems.
CN120835868APending Publication Date: 2025-10-24VITRO FLAT GLASS LLC
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Patent Information
- Application Number
- CN202480017392.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-01
- Filing Date
- 2024-03-04
- Publication Date
- 2025-10-24
AI Technical Summary
Technical Problem
The existing substrate reflects infrared radiation, which leads to inaccurate detection by LiDAR sensors. It is necessary to improve the transmittance of infrared radiation.
Method used
A multilayer dielectric layer, including metal oxides, metal alloy oxides, metal nitrides or combinations thereof, is coated on a substrate, with each layer having a thickness ranging from 10 to 180 nm, to ensure that at least 75% of light with a wavelength of 800-1050 nm is transmitted at 60° incident.
Benefits of technology
It improves the transmittance of the substrate to infrared radiation, ensuring accurate detection by LiDAR sensors, and is suitable for windshields and LiDAR systems in vehicles.
✦ Generated by Eureka AI based on patent content.
Abstract
A coated article comprising: a substrate; a first dielectric layer comprising a metal oxide, a metal alloy oxide, or a combination thereof, and having a thickness of at most 40 nm over at least a portion of the substrate; a second dielectric layer having a thickness of at most 40 nm over at least a portion of the first dielectric layer; a third dielectric layer comprising a metal oxide, a metal alloy oxide, or a combination thereof, and having a thickness of at least 130 nm over at least a portion of the second dielectric layer; and a fourth dielectric layer having a thickness of at least 130 nm over at least a portion of the third dielectric layer; wherein the coated article transmits at least 75% of light from a light source having a wavelength between 800 nm and 1,050 nm when contacted at 60 degrees with the light.
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