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Area of Science:

Optics and Photonics
Computer Vision
Robotics

Background:

Structured-light depth sensing is crucial for 3D imaging applications.
Existing systems often face limitations in resolution, speed, or compactness.

Purpose of the Study:

To develop a real-time scanning structured-light depth sensing system with enhanced resolution and speed.
To demonstrate a compact module for high-accuracy 3D sensing.

Main Methods:

Integration of a solid-state vertical cavity surface-emitting laser (VCSEL) beam scanner with an electro-thermally tunable VCSEL.
Utilizing swept voltage for beam scanning across a 6°×12° field of view at 100 kHz.
Employing flat optics for a compact scanning module design.

Main Results:

Achieved real-time depth imaging with a lateral resolution of 10,000 (20×500) at a frame rate >10Hz.
Demonstrated potential for 50,000 (100×500) resolution at >20Hz with a higher-speed camera.
Developed a compact scanning module with a >40°×20° field of view.

Conclusions:

The developed VCSEL-based system enables high-resolution and high-accuracy structured-light depth sensing.
The compact module design facilitates integration into various 3D imaging applications.
The system shows robustness against noise, ensuring reliable performance.