Photonic Chip Module Waveguide Arrangement for LiDAR Field of View
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current photonic chip modules in LiDAR systems have a limited detection field of view in the slow-axis scanning direction, restricting the vertical detection capability.
Innovation Solution
A photonic chip module with multiple transceiving waveguide modules and a reflection unit, where the transceiving ends are arranged along a preset direction and the reflection modules are staggered along a perpendicular direction, allowing detection light to be emitted and received in a manner that increases the detection field of view by forming sub-detection fields that collectively enhance the LiDAR's vertical detection capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple transceiving waveguide modules are used with reflection modules arranged along the second preset direction, then the detection field of view in the slow-axis scanning direction is increased, but the device complexity increases
Solution Approach 1:
The photonic chip is divided into multiple first transceiving waveguide modules, each with its own emitting and receiving waveguides. This segmentation allows the detection field to be divided into multiple sub-detection fields that collectively cover a broader area in the slow-axis scanning direction, resolving the contradiction between increased field of view and device complexity.
Solution Approach 2:
The patent introduces a second preset direction perpendicular to the first preset direction (which corresponds to the fast-axis scanning direction). By arranging transceiving waveguide modules and reflection modules along this second dimension, the system expands the detection field of view vertically without compromising the existing fast-axis performance, effectively adding another dimension to the detection capability.
2Measurement precision
If the emergent end and incident end are staggered along the first preset direction, then the fast-axis scanning offset is alleviated, but the slow-axis detection field of view remains limited
Solution Approach 1:
The patent resolves the limitation by introducing arrangement along a second preset direction that is perpendicular to the first preset direction. Multiple transceiving waveguide modules are arranged along this second dimension, allowing the system to maintain the staggered configuration for fast-axis offset correction while simultaneously expanding the slow-axis detection field of view through the collective coverage of multiple modules positioned at different locations along the second direction.
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 enhances the detection field of view of LiDAR systems while maintaining resolution, or improves resolution under the same detection field conditions, making it suitable for applications requiring broader detection ranges.
Implementation Method 1
Each reflection module has a first reflection surface opposite the first transceiving end along the second preset direction, reflecting the detection light and echo light
Data Source
AI summary
The present embodiment discloses a photonic chip module, LiDAR, and a mobile device. The photonic chip module includes a photonic chip and a reflection unit. The photonic chip includes a cladding and multiple first transceiving waveguide modules. The first transceiving waveguide module is embedded in the cladding, and the first emergent end and the first incident end are arranged at intervals along a first preset direction, collectively forming the first transceiving end of each first transceiving waveguide module, with these ends being spaced along a second preset direction. The reflection unit includes multiple reflection modules arranged along the second preset direction. Each reflection module has a first reflection surface. The photonic chip module provided in this embodiment is advantageous for increasing the detection field of view of the LiDAR under the same resolution conditions.