Holographic LiDAR Scanning With Adaptive Structured Light Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light detection and ranging systems are limited in their ability to efficiently and accurately survey a scene, particularly in dynamically changing environments, due to fixed light footprints and lack of real-time adaptability.
Innovation Solution
A method utilizing computer-generated holograms to dynamically modulate light footprints in a scene, allowing for real-time changes in size, shape, and pattern, enabled by a spatial light modulator and feedback from light detectors to optimize scanning and surveying techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed light footprints are used in light detection and ranging systems, then the system structure is simple, but the adaptability to dynamic environments is poor
Solution Approach 1:
The patent applies dynamics by transforming fixed light footprints into dynamically adjustable ones through computer-generated holograms. The holograms enable real-time modification of light footprint characteristics (size, shape, pattern) in response to environmental changes, allowing the LIDAR system to adapt to dynamic scenes while maintaining a relatively simple overall system structure.
Solution Approach 2:
The patent utilizes parameter changes by modifying key parameters of the light footprints (spatial distribution, intensity pattern, geometric shape) through holographic modulation. This allows the system to adapt to different scanning requirements and dynamic environments by changing light parameters rather than redesigning the entire optical system.
2Measurement precision
If traditional scanning methods are used, then the device complexity is low, but the surveying accuracy and efficiency are limited
Solution Approach 1:
The patent applies segmentation by dividing the scene surveying task into multiple simultaneous measurements using array detectors. Each detector element captures information from a specific sub-area, enabling parallel data collection that improves both accuracy and efficiency while managing system complexity through modular detection architecture.
Solution Approach 2:
The patent introduces another dimension by transitioning from sequential scanning to simultaneous multi-point measurement using array detectors. This dimensional change from time-sequential to spatial-parallel measurement enables faster scene surveying with improved accuracy without proportionally increasing system complexity.
3Productivity
If dynamic light footprint modulation is implemented, then the scene surveying efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical scanning systems with computer-generated holographic modulation. Instead of physically moving mirrors or scanning lenses, the system uses computational holograms to dynamically modulate light footprints, achieving faster and more flexible scene surveying efficiency while reducing mechanical complexity.
Solution Approach 2:
The patent introduces computer-generated holograms as an intermediary between the light source and the scene. This intermediary enables dynamic light footprint modulation without requiring complex mechanical adjustments, improving scene surveying efficiency while managing system complexity through software-based control.
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 approach enhances the accuracy and efficiency of scene surveying by allowing for adaptive light footprint configurations, improving spatial resolution and data collection in dynamic environments.
Implementation Method 1
Light modulation may be achieved using electrically-addressable liquid crystals
Implementation Method 2
an optical system associated with the array of light detecting elements. The optical system is arranged such that each light detecting element (only) receives light from a respective (and unique) sub-area of the replay field
Implementation Method 3
receiving, by a light detector, reflected spatially modulated light having the first characteristic from the scene and outputting a light response signal
Data Source
AI summary
A light detection and ranging system arranged to scan a scene is provided. A light source outputs light having a first characteristic. A spatial light modulator receives output light from the light source and outputs spatially-modulated light in accordance with computer-generated holograms represented thereon. A light detector receives light having the first characteristic from the scene and outputs a light response signal. A holographic controller is arranged to output a plurality of computer-generated holograms to the spatial light modulator. Each computer-generated hologram is arranged to form structured light having a corresponding pattern within the scene. The holographic controller is further arranged to change the pattern of the structured light formed by at least one of the plurality of computer-generated holograms.