Vehicle Mirrors and Windows Filtering LiDAR Near-IR Light
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Solution Overview
Problem
Existing LiDAR and laser measuring devices in motor vehicles face limitations due to human eye safety concerns and comfort issues, particularly in the near-infrared and infrared wavelength ranges, necessitating improved solutions to enhance performance and occupant comfort.
Innovation Solution
Integration of filter means, such as absorption, dichroic, or interference filters, into rear-view mirrors and passenger compartment windows to absorb or redirect unwanted electromagnetic radiation, specifically in the 900 nm to 1550 nm range, reducing exposure to LiDAR and laser wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If higher power levels are used in LiDAR sensors, then measurement range and performance are improved, but eye safety risks and comfort restrictions increase
Solution Approach 1:
The patent converts the harmful LiDAR radiation into a beneficial filtering mechanism by using the same radiation to activate photochromic materials in rear-view mirrors and windows, which then filter subsequent harmful radiation while maintaining visibility for drivers and passengers
Solution Approach 2:
Photochromic materials serve as intermediary substances that absorb harmful LiDAR radiation in the 900-1550 nm wavelength range while being transparent to visible light, thereby protecting occupants without compromising the functionality of LiDAR sensors
2Measurement precision
If LiDAR sensors operate in the 900 nm to 1550 nm wavelength range, then measurement capability is improved, but occupant comfort deteriorates due to perception effects
Solution Approach 1:
The patent applies photochromic filtering properties specifically to rear-view mirrors and windows, creating localized protection zones where the photochromic materials are positioned to filter LiDAR radiation while maintaining optical clarity for driver visibility and comfort
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
Enhances occupant comfort and safety by minimizing disruptive light penetration, allowing for higher performance of LiDAR sensors and laser measuring devices while adhering to safety regulations.
Implementation Method 1
comprises a filter means that absorbs light within at least one wavelength range
Implementation Method 2
reflects said light in a different direction than light outside the wavelength range
Implementation Method 3
Another variant is constituted by photochromic materials, which undergo a reversible transformation by absorbing electromagnetic radiation
Data Source
AI summary
A motor vehicle having at least one rear-view mirror provided for use by the driver and having a reflecting mirror surface formed by a mirror material, in particular an interior mirror and/or an exterior mirror, and/or at least one passenger compartment window, in particular a windshield and/or a rear window and/or at least one side window, comprising a window material, in particular glass; the at least one rear-view mirror and/or the at least one passenger compartment window comprising a filter medium which absorbs light within at least one wavelength range and/or, in the case of the rear-view mirror, which reflects said light in a different direction from light outside the wavelength range.