Laminated Vehicle Glazing With Local NIR Window for LIDAR
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Solution Overview
Problem
Existing laminated glazing systems for vehicles, particularly windshields, face challenges in improving performance when integrated with near-infrared LIDAR systems, including reduced mechanical strength and increased heat absorption.
Innovation Solution
A laminated glazing system comprising a first exterior glass sheet with low iron oxide content, a lamination interlayer, and a second interior glass or plastic sheet with high iron oxide content and a traversing hole, which enhances near-infrared transmission and mechanical strength while reducing heat absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a second glass sheet with high iron oxide content is used to absorb near-infrared radiation, then heat absorption is improved, but near-infrared transmission for LIDAR is reduced
Solution Approach 1:
The patent applies local quality by creating a traversing hole (local modification) in the second glass sheet at the specific location where LIDAR radiation passes through. This allows the glass to maintain its high iron oxide content for heat absorption while creating a localized transparent pathway for near-infrared LIDAR wavelengths, thus resolving the contradiction between heat absorption and near-infrared transmission.
Solution Approach 2:
The patent segments the second glass sheet by creating a traversing hole that divides it into regions: areas with high iron oxide content for heat absorption and a localized hole region for near-infrared transmission. This segmentation allows different functional zones within the same component to address conflicting requirements.
2Illumination intensity
If the thickness of glass sheets is reduced to improve visibility, then optical transmission is improved, but mechanical strength is reduced
Solution Approach 1:
The patent uses composite materials by combining multiple layers: a first glass sheet with low iron oxide content for high visibility, a polymer interlayer for bonding and flexibility, and a second glass sheet with high iron oxide content for heat absorption. This composite structure allows each layer to contribute its strengths, achieving both good optical transmission and mechanical strength that would be difficult to obtain with a single thin glass sheet.
Solution Approach 2:
The patent addresses the strength-thickness trade-off by moving to a multi-dimensional layered structure rather than relying solely on increasing the thickness of a single glass sheet. The combination of multiple thin layers with different properties creates a composite system where the overall mechanical strength is enhanced while maintaining optical transmission.
3Use of energy by moving object
If a traversing hole is created in the second glass sheet for LIDAR transmission, then near-infrared transmission is improved, but mechanical strength is reduced
Solution Approach 1:
The patent uses composite materials to compensate for the mechanical weakness introduced by the traversing hole. The polymer interlayer provides flexibility and bonding, while the combination of multiple glass sheets with different iron oxide contents creates a distributed structure that maintains overall strength despite the localized hole for LIDAR transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves high transmission in the near-infrared region, improved mechanical strength, and reduced heat absorption, thereby enhancing the performance and comfort of vehicles equipped with LIDAR systems.
Implementation Method 1
the first glass sheet exhibits a content by weight of total iron oxide of at most 0.05%
Implementation Method 2
the second glass or plastic sheet is capable of absorbing (significantly) in the near infrared; for example, the second sheet is made of glass and exhibits a content by weight of total iron oxide of at least 0.4%
Implementation Method 3
a lamination interlayer (single fine sheet or plurality of fine sheets), optionally neutral, clear, extraclear or tinted, in particular gray or green, made of polymer material, preferably thermoplastic polymer material
Data Source
AI summary
A vehicle laminated glazing includes a first extraclear glass sheet (exterior glazing), a lamination interlayer and a second glass or plastic sheet (interior glazing) with a traversing hole.