Integrated LiDAR Lens Modules for Precise Emitter-Receiver Alignment
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Solution Overview
Problem
Existing LiDARs have complex and non-axisymmetric structural components, leading to poor optical performance stability, increased manufacturing costs, and difficulty in aligning emitter and receiver modules, which affects heat dissipation and mass production.
Innovation Solution
A LiDAR design with an integrated emitter and receiver module on a single substrate, using axisymmetric emission and receiving lens modules, and reflective mirror modules positioned outside the lens barrel, allowing for independent alignment and simplified assembly, reducing the need for movable spaces and improving heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the emission lens module and receiving lens module are integrated into a complex lens barrel structure, then the optical components can be housed together, but the processing precision of optical positioning surfaces deteriorates and manufacturing complexity increases
Solution Approach 1:
The patent divides the optical system into separate modules: the emission lens module and receiving lens module are independently positioned and adjusted, rather than being integrated into a single complex lens barrel. This segmentation allows each module to be manufactured and adjusted independently, improving optical positioning precision while reducing overall manufacturing complexity.
Solution Approach 2:
The patent extracts the optical positioning surfaces from the complex lens barrel structure and places them on adjustable mounts. This extraction allows the optical surfaces to be precisely positioned and adjusted independently, resolving the contradiction between housing integration and positioning precision.
2Measurement precision
If the emitter module or receiver module position is adjusted for alignment, then precise alignment can be achieved, but movable space must be reserved reducing heat dissipation performance
Solution Approach 1:
The patent performs preliminary alignment by adjusting the emission lens module and receiving lens module positions before final assembly. This preliminary adjustment ensures precise alignment is achieved during manufacturing, eliminating the need for reserved movable space that would compromise heat dissipation.
Solution Approach 2:
The patent uses adjustable mounting structures that allow precise positioning of optical modules. These mounting structures enable alignment adjustments without requiring additional movable space in the final compact design, thus maintaining heat dissipation performance.
3Adaptability or versatility
If non-axisymmetric structures are used for emission and receiving lens modules, then the optical paths can be deflected, but manufacturing difficulty increases and optical performance stability decreases
Solution Approach 1:
The patent uses symmetric lens structures combined with adjustable mounting positions to achieve optical path deflection. Rather than manufacturing complex non-axisymmetric lenses, the system maintains simple symmetric lens geometries and achieves the required optical path control through precise positioning and adjustment of the lens modules.
Solution Approach 2:
The patent introduces adjustable and movable mounting structures for the lens modules, allowing dynamic positioning and alignment adjustment. This dynamic capability replaces the need for complex fixed non-axisymmetric lens shapes, simplifying manufacturing while maintaining optical path flexibility.
4Measurement precision
If the emitter and receiver modules are aligned by adjusting their positions, then proper alignment can be achieved, but the structure becomes more complex and mass production becomes difficult
Solution Approach 1:
The patent implements preliminary alignment features during module manufacturing, with pre-positioned mounting structures and adjustment mechanisms. This allows alignment to be established during assembly rather than requiring complex post-assembly adjustments, significantly improving mass production efficiency while maintaining alignment precision.
Solution Approach 2:
The patent designs self-aligning mounting structures that automatically position the emitter and receiver modules correctly during assembly. These structures include features like precision bores,定位 pins, and adjustable mounts that enable automatic alignment, eliminating the need for complex manual alignment procedures and facilitating mass production.
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
Enhances optical performance stability, reduces manufacturing complexity and costs, and facilitates precise alignment without adjusting emitter and receiver positions, thereby improving detection efficiency and accuracy.
Implementation Method 1
The emission lens module is arranged in the first optical channel and corresponding to the emitter module. The emission lens module is configured to collimate the detection beam.
Implementation Method 2
The receiving lens module is arranged in the second optical channel and corresponding to the receiver module. The receiving lens module is configured to shape the echo beam.
Implementation Method 3
The first reflective mirror module is configured to change a transmission direction of the detection beam collimated by the emission lens module to deflect the detection beam to the scanner module, and change a transmission direction of the echo beam deflected by the scanner module to deflect the echo beam to the receiving lens module.
Data Source
AI summary
A LiDAR includes a substrate, an installing base, an emission lens barrel, a receiving lens barrel, and a scanner. The substrate includes an emitter arranged on a surface of the substrate emitting a detection beam and a receiver arranged on the same surface for receiving an echo beam. The installing base includes a first optical channel and a second optical channel, isolated from each other. The first and second optical channels are configured to penetrate through a first end and a second end of the installing base. The detection beam and echo beam pass through the first and second channels, respectively. The first end is configured to fixedly connect to the substrate. The emission lens barrel is connected to the second end. The receiving lens barrel is connected to the second end. The scanner is configured to adjust directions of the detection beam and the echo beam.