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Wide-angle MEMS-based imaging lidar by decoupled scan axes.
Applied Optics
|April 1, 2020
Summary
This study introduces a novel scanning lidar architecture using a digital micromirror device (DMD) for enhanced field of view and faster range finding. The system decouples lidar components for improved performance and adjustable trade-offs.
Area of Science:
- Optics and Photonics
- Robotics and Automation
- Computer Vision
Background:
- Traditional scanning lidar systems face trade-offs between scan angle, speed, and aperture size.
- Optimizing these parameters independently is crucial for advanced lidar applications.
Purpose of the Study:
- To present a new optical architecture for scanning lidar.
- To decouple the transmitter and receiver design parameters.
- To achieve a wider field of view and faster range finding capabilities.
Main Methods:
- An optical architecture incorporating a digital micromirror device (DMD) at an intermediate image plane in the receiver.
- Utilizing a galvo mirror for the transmitter's horizontal scan and the DMD for the receiver's vertical scan.
- Developing an optimized system to analyze parameter trade-offs.
Main Results:
- Achieved a 50° increased field of view.
- Enabled centimeter transmitter beam diameter.
- Facilitated video frame rate range finding captures.
- Demonstrated decoupling of scan angle, speed, and aperture size.
Conclusions:
- The proposed lidar architecture effectively overcomes traditional design limitations.
- The system offers flexibility in adjusting parameters for diverse lidar applications.
- This approach enables high-performance scanning lidar with enhanced imaging capabilities.
