Resonant scanning design and control for fast spatial sampling

Area of Science:

• Optics and Photonics
• Mechanical Engineering
• Computer Vision

Background:

• Two-dimensional resonant scanners offer compact, high-speed imaging but suffer from inflexible scanning patterns and phase uncertainty.
• Limitations hinder their practical application in advanced imaging systems.

Purpose of the Study:

• To develop optimized design and control methods for two-dimensional resonant scanner trajectories.
• To address constraints like high frame-rate and limited actuation amplitude for improved performance.

Main Methods:

• Proposed an analytical design rule for uniform spatial sampling, expanding the design space.
• Utilized an optimization algorithm to modulate scanning parameters for flexible, Region-of-Interest (RoI) focused patterns.
• Implemented high-bandwidth phase monitoring using a position-sensitive photodetector and electronics.

Main Results:

• Demonstrated theoretically and experimentally that proposed designs improve scanning range and fill factor.
• Simulations showed benefits for computer vision tasks like LiDAR odometry and 3D object detection.
• Experimental verification of unmodulated and modulated scanning modes achieved high frame-rate spatial sampling.

Conclusions:

• Optimized designs and control strategies significantly enhance the capabilities of two-dimensional resonant scanners.
• Flexible scanning patterns and improved sampling enable advanced imaging and computer vision applications.
• High-bandwidth phase monitoring is crucial for realizing these advanced scanning capabilities.