LIDAR Detector Array with Individual Optical Elements for Range Resolution
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Solution Overview
Problem
Conventional LIDAR systems face challenges in accurately detecting objects at varying distances due to the use of a shared imaging optic, which can result in out-of-focus objects and reduced imaging resolution for objects at different ranges, leading to suboptimal performance in autonomous vehicle navigation.
Innovation Solution
The implementation of an array of light detectors with a shared imaging optic and an array of optical elements that modify individual light signal paths based on aspects of the scene, such as distance, polarization, and intensity, allowing each light detector to focus on specific regions and improve imaging resolution and accuracy across different object ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared imaging optic is used in conventional LIDAR systems, then the device complexity is reduced, but the imaging resolution and focus accuracy deteriorate for objects at different ranges
Solution Approach 1:
The patent divides the optical system into multiple segments: a shared imaging optic for light collection and an array of individual optical elements (lenses or mirrors) positioned in front of each light detector. Each detector-optical element pair forms a separate detection channel, allowing independent optimization of focus and field of view for each detector while sharing the common imaging optic, thus resolving the contradiction between system complexity and imaging precision.
Solution Approach 2:
The patent applies local quality by providing each light detector with its own customized optical element that can be independently optimized for specific detection requirements. This allows different focal lengths, field of view angles, or optical characteristics to be assigned to different detectors based on their specific functional needs, improving overall system imaging resolution without requiring complete duplication of the entire optical system.
2Manufacturing precision
If individual optical elements are added for each light detector, then the imaging resolution and focus accuracy improve, but the device complexity increases
Solution Approach 1:
The patent merges the function of individual optical elements with the shared imaging optic to create a hybrid system. The array of optical elements handles fine-tuned focus and field of view control for each detector, while the shared imaging optic performs the bulk function of light collection and initial imaging, combining the benefits of both individualized and shared optical paths to achieve high resolution without excessive complexity.
Solution Approach 2:
The shared imaging optic serves multiple functions: it collects light from all directions, forms initial images for all detectors, and works in conjunction with the array of individual optical elements. This multi-functional design reduces the need for completely separate optical systems for each detector, thereby improving imaging resolution while controlling overall system complexity.
3Device complexity
If conventional receiver subsystems use a shared imaging optic, then the system structure is simplified, but the ability to detect objects at varying distances with high precision deteriorates
Solution Approach 1:
The patent introduces dynamic adjustability by allowing individual optical elements to be repositioned or reconfigured based on detection needs. This enables the system to adapt focus and field of view for different object distances dynamically, improving distance detection precision while maintaining a relatively simple overall structure through the shared imaging optic framework.
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 ability of LIDAR systems to detect and differentiate objects at various distances with improved resolution and accuracy, effectively addressing the limitations of conventional systems in autonomous navigation and computer vision applications.
Implementation Method 1
Each respective light signal is transmitted via the shared imaging optic and modified by a respective optical element
Implementation Method 2
individual light signals may be modified to have different divergences, polarizations, intensities, etc. based on a region of the scene
Implementation Method 3
The array of optical elements may alter (e.g., using a filter, a lens, a mirror, an aperture, etc.) individual light signal paths
Implementation Method 4
Each light detector in the array of light detectors is configured to detect a respective light signal from a respective region of a scene
Data Source
AI summary
Example embodiments relate to arrays of light detectors with a corresponding array of optical elements. An example embodiment includes a light detection and ranging (LIDAR) system. The LIDAR system includes an array of light detectors. The LIDAR system also includes a shared imaging optic. Further, the LIDAR system includes an array of optical elements positioned between the shared imaging optic and the array of light detectors. Each light detector in the array of light detectors is configured to detect a respective light signal from a respective region of a scene. Each respective light signal is transmitted via the shared imaging optic and modified by a respective optical element in the array of optical elements based on at least one aspect of the scene.