Adaptive LiDAR Optical Phased Array Beam Steering
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Solution Overview
Problem
Traditional 3D mapping technologies rely on mechanical components for beam steering, which are prone to mechanical vibrations and environmental variations, and lack adaptability in scan rate and resolution.
Innovation Solution
An adaptive LiDAR system with a transmitter and receiver array, featuring tunable amplitude and phase modulators, optical switching layers, and micro-lenses, allowing for real-time control of aperture, scan rate, and resolution, enabling efficient beam steering and target detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If mechanical moving parts are used for beam steering, then point-by-point scanning can be achieved, but mechanical vibrations and environmental variations occur
Solution Approach 1:
The patent replaces mechanical moving parts with an optical phased array system that uses phase modulation to achieve beam steering. The optical phased array employs N radiators with controllable phase shifts, allowing electronic control of beam direction without mechanical motion, thereby eliminating mechanical vibrations and improving reliability.
Solution Approach 2:
The system dynamically adjusts phase differences between adjacent radiators to steer the beam in real-time. By continuously modifying the phase distribution across the radiator array, the beam can be rapidly redirected to different angular positions without mechanical movement, achieving both high speed and stability.
2Adaptability or versatility
If fixed scan rate and resolution are used, then system simplicity is maintained, but adaptability to different targets is lost
Solution Approach 1:
The receiver control block dynamically adjusts scan rate and resolution based on target characteristics and application requirements. The system can switch between different operational modes, adjusting the scanning parameters in real-time to optimize performance for specific targets while managing control complexity through adaptive algorithms.
Solution Approach 2:
The system changes operational parameters (scan rate, resolution, aperture size) dynamically based on detection needs. By adjusting these parameters according to target distance, size, and importance, the system achieves multi-functionality without requiring multiple dedicated systems, balancing adaptability with controlled complexity.
3Measurement precision
If all radiators and receive elements are associated one-to-one, then maximum resolution is achieved, but scan rate decreases
Solution Approach 1:
The system dynamically configures the association between radiators and receive elements based on operational requirements. It can switch between one-to-one pairing for high-resolution mode and many-to-few or few-to-many pairing for high-speed scanning mode, allowing real-time optimization of the trade-off between resolution and scan rate according to application needs.
Solution Approach 2:
The system segments the radiator and receive element arrays into different groups that can be independently controlled and associated in various configurations. This segmentation allows flexible pairing strategies, such as grouping multiple radiators to illuminate a broader area simultaneously or combining signals from multiple receive elements, thereby achieving both high resolution and high scan rate in different operational scenarios.
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 adaptive LiDAR system achieves improved beam steering speed, reduced mechanical complexity, and enhanced target detection capabilities by dynamically adjusting scan rates and resolutions, mitigating the limitations of mechanical systems.
Implementation Method 1
The transmitter includes an optical phased array adapted to transmit a coherent light
Implementation Method 2
The receiver includes an array of photodetectors arranged in a two-dimensional configuration
Data Source
AI summary
An adaptive LiDAR includes, in part, a transmitter and a receiver. The transmitter includes, in part, an array of N radiators, and a transmitter control block adapted to control an aperture of the transmitter. The receiver includes, in part, an array of T receive elements, and a receiver control block adapted to control a scan rate and resolution of the receiver. M and T are integers greater than one.