LiDAR Laser Beam Emission Module Blind Spot Reduction
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Solution Overview
Problem
Current LiDAR systems suffer from large blind spots due to excessive intervals between the angles of view of adjacent emission laser beams, which negatively impact their detection effectiveness.
Innovation Solution
The integration of multiple light emission modules with an emission lens module and a light beam adjustment module, which narrows the divergence angle and expands the emission angle of view, and adjusts the interval between angles of view to be less than or equal to a preset value, thereby reducing blind spots and enhancing detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple lasers emit divergent beams with a conventional emission lens, then the device complexity is low, but the interval between angles of view of adjacent emission laser beams is large, creating blind spots in the field of view
Solution Approach 1:
The system divides the emission space into multiple regions by arranging multiple light emission modules (each containing multiple lasers) in specific spatial patterns. Each module covers a specific angular sector, and their combined coverage eliminates blind spots. The segmentation is achieved by controlling the spatial arrangement and emission angles of individual laser modules rather than using a single complex lens system.
Solution Approach 2:
The patent transitions from a single-plane laser arrangement to a three-dimensional spatial configuration of multiple light emission modules. By arranging modules in multiple dimensions (different positions and orientations in space), the system achieves comprehensive angular coverage that cannot be obtained from a single plane, effectively eliminating blind spots through spatial dimensionality.
2Area of stationary object
If the emission lens module increases the emission angle of view, then the field of view coverage is improved, but the divergence angle of individual beams increases, reducing beam precision
Solution Approach 1:
The system segments the beam control function by assigning each light emission module a specific angular sector. Each module's lasers emit beams within a controlled divergence angle, and the modular arrangement ensures that the combined coverage achieves wide angle of view while maintaining precise beam direction control within each segment's responsibility area.
Solution Approach 2:
Different regions of the emission space are assigned different quality characteristics. Central regions receive beams from multiple modules with overlapping coverage for high precision, while edge regions are covered by modules optimized for broader coverage. Each module is optimized for its specific angular sector, achieving local optimization that collectively solves the global contradiction.
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 configuration significantly reduces blind spots and improves the detection effect of LiDAR systems by ensuring a more comprehensive field of view with reduced power and cost requirements for individual emission modules.
Implementation Method 1
an emission lens module, located on a light outgoing side of the multiple light emission modules, configured to reduce a divergence angle of the emission laser beams emitted by the multiple light emission modules, and further configured to increase an emission angle of view of the emission laser beams
Implementation Method 2
a light beam adjustment module, located on a light outgoing side of the emission lens module and configured to adjust an interval between angles of view of all or some of emission laser beams output by the emission lens module
Data Source
AI summary
Embodiments of this application disclose a laser beam emission module and a LiDAR. The laser beam emission module includes: multiple light emission modules, where each light emission module is configured to emit an emission laser beam group, and the emission laser beam group includes multiple emission laser beams; an emission lens module, located on a light outgoing side of the multiple light emission modules, configured to reduce a divergence angle of the emission laser beams emitted by the multiple light emission modules, and further configured to increase an emission angle of view of the emission laser beams; and a light beam adjustment module, located on a light outgoing side of the emission lens module and configured to adjust an interval between angles of view of emission laser beams output by the emission lens module.