Antireflective Sticker for Lidar Window Reflection Reduction
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Solution Overview
Problem
Current LIDAR systems for autonomous vehicles face limitations in maximum illumination power due to eye safety regulations, which restrict their ability to reliably detect far-away objects in varying environmental conditions such as rain, fog, and darkness.
Innovation Solution
A replaceable antireflective sticker with a substrate thickness less than 5 mm and an antireflective coating is applied to the LIDAR system's window, allowing for enhanced light emission and reception while maintaining eye safety by reducing reflection and improving detection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the maximum illumination power of LIDAR systems is increased to detect far-away objects, then the detection capability is improved, but eye safety regulations are violated causing thermal damage to the retina
Solution Approach 1:
The patent introduces an intermediary component (optical element with anti-reflective coating) between the light source and the external environment. This intermediary reduces the reflection of light back into the system, allowing higher illumination power to be used without proportionally increasing the reflected light that could cause eye damage, thus mediating between power output and eye safety concerns
2Loss of energy
If the thickness of the optical element is increased to reduce reflection, then the antireflective effect is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness of the optical element to a specific range (0.1 mm to 5 mm) and incorporating anti-reflective coatings with specific refractive indices. These parameter optimizations achieve effective reflection reduction without requiring excessive thickness, thus balancing energy loss reduction with device simplicity
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 enables LIDAR systems to detect objects more effectively in challenging conditions by increasing the maximum illumination power without compromising eye safety, thereby enhancing the reliability of autonomous vehicle navigation systems.
Implementation Method 1
an antireflective coating on one side of the substrate
Data Source
AI summary
A replaceable antireflective sticker may include a substrate having a thickness less than 5 mm. The replaceable antireflective sticker may also include an antireflective coating on one side of the substrate. The antireflective sticker may further include a coupling surface for detachably coupling the antireflective sticker to a window of a LIDAR system.