Flash LiDAR Light Blocking Element Near-Field Detection
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Solution Overview
Problem
Existing LiDAR systems face inaccurate detection results in the near field due to insufficient reception of reflected light signals, caused by saturation from stray light, leading to a near-field blind spot.
Innovation Solution
The flash LiDAR employs a light blocking element to prevent stray light from reaching the receiving assembly, allowing for accurate detection of short-range targets by blocking direct emission of stray light and enabling the receiving assembly to respond quickly to reflected lasers, thus improving detection accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the receiving assembly is used to detect reflected laser signals, then detection capability is improved, but stray light causes saturation and near-field blind spots
Solution Approach 1:
The patent extracts and removes the harmful stray light from the optical path by introducing a light blocking element positioned between the emitting and receiving assemblies. This element specifically blocks stray light directed toward the receiving assembly while allowing reflected laser signals to reach the detector, thereby eliminating saturation and near-field blind spots without compromising detection capability
Solution Approach 2:
The light blocking element serves as an intermediary component that mediates between the emitting assembly and receiving assembly. It selectively intercepts harmful stray light before it reaches the receiver while permitting useful reflected signals to pass through, thus protecting the receiving assembly from saturation while maintaining its detection function
2Measurement precision
If light blocking elements are added to block stray light, then near-field detection accuracy is improved, but device complexity increases
Solution Approach 1:
The light blocking element is designed to perform multiple functions simultaneously: it blocks stray light directed at the receiving assembly, defines the field of view, and prevents near-field blind spots. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved near-field detection accuracy
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 solution effectively reduces the near-field blind spot and enhances the accuracy and reliability of LiDAR detection by preventing interference from stray light, ensuring precise detection of short-range objects without mechanical components.
Implementation Method 1
a light blocking element, configured to block stray light directed to the receiving assembly
Implementation Method 2
a reflected laser returning after being reflected by an object in the detection region
Implementation Method 3
the at least one light-emitting element is arranged in an array, and is configured to emit an outgoing laser to a detection region
Data Source
AI summary
A flash LiDAR is provided and includes: an emitting assembly (3), a receiving assembly (4), a light blocking element (5), and a control assembly (6). The emitting assembly (3) includes at least one light-emitting element (31), configured to emit an outgoing laser to a detection region; the receiving assembly (4) is configured to receive a reflected laser returning after being reflected by an object in the detection region, where the emitting assembly (3) and the receiving assembly (4) are arranged abreast; and the light blocking element (5) is configured to block stray light directed to the receiving assembly (4).