Refractive Beam Steering for Uniform LIDAR Scan Line Spacing
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Solution Overview
Problem
Conventional LIDAR systems experience non-uniform coverage due to uneven spacing in projected beams, leading to inadequate range accuracy and detection sensitivity, particularly in high-resolution applications requiring precise refractive beam steering.
Innovation Solution
The implementation of a refractive beam-steering system that uses a combination of optical components, such as Risley prisms, to generate a triangular waveform, ensuring even spacing of scan lines and optimizing the scan pattern for uniform coverage, eliminating the need for extensive tuning and reducing power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional LIDAR systems use standard scanning methods, then the system structure is simple, but the beam spacing is non-uniform leading to poor coverage quality
Solution Approach 1:
The patent divides the beam steering function into multiple independent optical components (first and second optical components) that can be individually controlled. Each component handles a portion of the scanning task, allowing precise independent adjustment of beam spacing and angular frequency to achieve uniform coverage while maintaining modular system architecture
Solution Approach 2:
The patent implements dynamic control of optical components by varying angular frequency and relative phase parameters in real-time. The system adjusts these parameters dynamically during operation to maintain uniform beam spacing across different scanning conditions, transforming a static system into an adaptively controlled dynamic system
2Measurement precision
If LIDAR systems increase scanning resolution, then detection sensitivity improves, but power consumption increases
Solution Approach 1:
The patent optimizes power consumption by carefully selecting and adjusting key parameters including angular frequency ratios and relative phase differences between optical components. By changing these parameters to achieve resonant or optimized operating conditions, the system maintains high scanning resolution and detection sensitivity while minimizing energy requirements for the scanning operation
3Manufacturing precision
If LIDAR systems use complex scan patterns, then coverage uniformity improves, but system tuning complexity increases
Solution Approach 1:
The patent enables the system to automatically achieve uniform coverage by configuring the optical components with specific angular frequency and phase relationships. Once configured, the system self-regulates to maintain uniform beam spacing without requiring continuous manual tuning or complex control algorithms, reducing operational complexity while preserving coverage quality
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
This approach achieves uniform coverage and improved range accuracy by approximating a triangular waveform with multiple optical components, enhancing the detection sensitivity and reducing power consumption in high-resolution LIDAR systems.
Implementation Method 1
refractive beam-steering system that uses a combination of optical components, such as Risley prisms
Data Source
AI summary
An apparatus is presented for refractive beam steering in a LIDAR system. The apparatus includes a first scanner that receives a beam transmitted along an optical axis and projects the beam as a plurality of scan lines in a first plane between a first angle and a second angle, wherein the first angle and the second angle are defined with respect to the optical axis; a motor that is coupled to the first scanner; one or more processors that are configured to generate rotation information based on one or more components of a particular waveform and transmit a signal to the motor, the signal causing the motor to rotate the first scanner based on the rotation information.