Offset Pixel Array LiDAR Optical System for Precision Distance Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LiDAR systems face challenges in providing 2D or 3D distance information with higher precision, lower costs, and faster results.
Innovation Solution
The optical system comprises a bulk receiving optic, a pixel array with offset columns of pixels, and a set of input channels. This configuration allows for the collection of illumination beams and their alignment with corresponding pixels, enabling precise distance information collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional LiDAR systems are used, then distance information can be collected, but precision and dynamic range are limited
Solution Approach 1:
The optical system is segmented into multiple independent input channels, each with its own optical path and detector element. This segmentation allows each channel to be optimized for specific angular ranges while collectively providing comprehensive field of view coverage, thereby improving measurement precision without requiring a single complex optical system
Solution Approach 2:
The patent introduces angular dimension segmentation by directing light from different angular ranges to different input channels through prism arrays. This dimensional approach to angular separation enables precise distance measurement across multiple directions simultaneously, enhancing overall system precision while maintaining manageable complexity through modular architecture
2Measurement precision
If higher precision distance information is collected, then measurement accuracy improves, but system cost increases
Solution Approach 1:
The system uses multiple copies of simpler optical components (prisms, detector elements) arranged in arrays rather than a single complex optical path. Each input channel is a replicated unit that can be manufactured independently and assembled in arrays, reducing overall system cost while achieving high precision through the collective capability of multiple channels
Solution Approach 2:
The patent employs relatively simple and cost-effective optical components such as prisms and standard detector elements that can be manufactured at lower costs compared to complex optical systems. These components are arranged in arrays to achieve high precision collectively, making the system more cost-effective while maintaining manufacturing ease
3Adaptability or versatility
If traditional pixel arrays are used, then structure is simple, but dynamic range and precision are limited
Solution Approach 1:
The detector array is segmented into multiple independent detector elements, each associated with a specific input channel and angular range. This segmentation allows each detector element to be optimized for specific measurement conditions, collectively providing extended dynamic range and enhanced precision without requiring a single overly complex pixel array structure
Solution Approach 2:
Each input channel and its associated detector element serve multiple functions: they detect light from specific angular ranges, provide distance measurement capability, and contribute to the overall dynamic range. This multi-functionality of each modular unit enhances system adaptability while maintaining a relatively simple overall structure through standardized repeating units
4Productivity
If faster distance information collection is achieved, then productivity improves, but measurement precision may deteriorate
Solution Approach 1:
The multiple input channels operate simultaneously and continuously, each collecting distance information from its designated angular range without interruption. This parallel continuous operation enables fast overall data collection while each individual channel maintains sufficient integration time for precise measurements, resolving the trade-off between speed and precision
Solution Approach 2:
The field of view is segmented into multiple angular ranges, each handled by a dedicated input channel that collects data independently and simultaneously. This segmentation allows parallel data acquisition across all channels, dramatically improving productivity while each channel's focused angular coverage maintains high measurement precision through dedicated optical paths
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
The system achieves higher precision and dynamic range in distance information collection while maintaining lower costs and faster results, effectively addressing the limitations of existing LiDAR technologies.
Implementation Method 1
collect illumination beams of a plurality of illumination sources reflected from a field outside the optical system
Implementation Method 2
bulk receiving optic configured to collect illumination beams... defines a focal plane opposite the field
Implementation Method 3
each of the set of lens... configured to offset the focal plane opposite the bulk receiving optic by the second focal length and collimate light rays having wavelengths substantially equivalent to an operating wavelength of the optical system
Data Source
AI summary
Optical systems and methods for collecting distance information are disclosed. An example optical system includes a first transmitting optic, a plurality of illumination sources, a pixel array comprising at least a first column of pixels and a second column of pixels, each pixel in the first column of pixels being offset from an adjacent pixel in the first column of pixels by a first pixel pitch, the second column of pixels being horizontally offset from the first column of pixels by the first pixel pitch, the second column of pixels being vertically offset from the first column of pixels by a first vertical pitch; and a set of input channels interposed between the first transmitting optic and the pixel array.