Lidar Beam Splitter for FOV Expansion and Alignment
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Solution Overview
Problem
Existing Lidar systems face limitations in detection effect and distance due to restricted laser emission and reception apertures, and the coaxial optical path design results in insufficient field of view, complicating adjustments and increasing maintenance costs.
Innovation Solution
An optical device with a beam splitting assembly that directs outgoing and reflected light signals, incorporating a reflector assembly to modify light paths, and a collimating assembly to adjust emission characteristics, along with a focusing assembly to converge reflected signals, enhancing detection capabilities and simplifying adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple emitting assemblies and receiving assemblies are used to expand field of view, then detection range is improved, but device complexity and adjustment difficulty increase
Solution Approach 1:
The patent divides the optical system into multiple independent optical transceiver components, each with its own emitting assembly, beam splitting assembly, and receiving assembly. Each component can be independently adjusted and calibrated, reducing the overall adjustment complexity while expanding the total field of view through spatial arrangement of multiple components.
Solution Approach 2:
The patent arranges multiple optical transceiver components in a spatial configuration that expands the field of view in multiple dimensions. By positioning components at different locations and orientations, the system achieves broader coverage without proportionally increasing adjustment complexity, as each component maintains its own independent adjustment mechanism.
2Volume of moving object
If multiple optical components are assembled within limited inner space, then compactness is improved, but optical components mutually affect each other's performance during adjustment
Solution Approach 1:
The patent segments the optical system into modular optical transceiver components that can be independently adjusted. Each module contains its own emitting assembly, beam splitting assembly, and receiving assembly, allowing for independent calibration that prevents mutual interference between components while maintaining compact integration within the limited space.
Solution Approach 2:
The beam splitting assembly acts as an intermediary element that separates the optical paths of multiple components. By using beam splitting assemblies with precise optical separation, the patent enables multiple optical components to coexist in limited space without their light paths interfering with each other, thus maintaining reliable optical performance.
3Device complexity
If coaxial optical path design is used, then structure is simplified, but detection distance and effect are limited due to restricted aperture
Solution Approach 1:
The patent segments the optical path into separate emitting and receiving paths using beam splitting assemblies. This allows the emitting assembly and receiving assembly to have different aperture sizes optimized for their respective functions, improving detection distance and effect while maintaining relatively simple structure through modular design.
Solution Approach 2:
The patent transitions from a strict coaxial design to a multi-dimensional optical arrangement where emitting and receiving paths are separated in space. By using beam splitting assemblies to direct light paths in different directions, the system achieves larger effective apertures for both emission and reception, improving detection performance without significantly increasing structural complexity.
4Adaptability or versatility
If emitting and receiving systems are adjusted independently, then adjustment flexibility is improved, but adjustment and calibration becomes complicated and inefficient
Solution Approach 1:
The patent divides the adjustment system into independent modules for each optical transceiver component. Each module can be adjusted separately using standardized adjustment mechanisms, allowing for flexible configuration while maintaining efficient calibration processes through modular independence.
Solution Approach 2:
The patent employs adjustable parameters such as the tilt angles of beam splitting assemblies and the positions of emitting and receiving assemblies. These parameters can be independently modified to optimize system performance, providing adjustment flexibility while maintaining efficient calibration through systematic parameter optimization rather than complex mechanical adjustments.
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
Improves detection performance and distance while reducing complexity and maintenance costs by optimizing light path management and alignment processes.
Implementation Method 1
a beam splitting assembly configured to pass the outgoing light signal from the emitting assembly to a detection region, receive a reflected light signal from the detection region
Implementation Method 2
a collimating assembly configured to modify emission characteristics of the outgoing light signal along a first axis and a second axis, the first axis and the second axis being perpendicular to the transmission direction
Implementation Method 3
a focusing assembly configured to converge the reflected light signal onto the receiving assembly
Data Source
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AI summary
An optical device (10) includes an emitting assembly configured to emit an outgoing light signal, a beam splitting assembly configured to pass the outgoing light signal from the emitting assembly to a detection region, receive a reflected light signal from the detection region, and modify a transmission direction of the reflected light signal, a receiving assembly configured to receive the reflected light signal from the beam splitting assembly after the direction modification and generate an electrical signal in response to the reflected light signal. A method of adjusting an optical device (10) detects the reflected light signal directed from the beam splitting assembly to the receiving assembly, compares the reflected light signal with a threshold value, and adjusts the optical transceiver component until the reflected light signal received by the receiving assembly is greater than or equal to the threshold value.