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Multipulse gate-delayed range gating imaging lidar.

Long Wu¹, Yuan Zhao, Yong Zhang

¹Department of Physics, Harbin Institute of Technology, Harbin 150001, China.

|April 19, 2011

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This study introduces a novel range gating lidar technique that enhances depth map resolution by applying gate delays to returned laser pulses. This method improves resolution from 6m to 1.5m with a simple system structure.

Area of Science:

Optics and Photonics
Remote Sensing Technology
Computer Vision

Background:

Traditional range gating lidar systems face limitations in achieving high-resolution depth maps.
Improving depth resolution is crucial for advanced applications in autonomous systems and 3D mapping.
Existing methods often involve complex system designs or increased power requirements.

Purpose of the Study:

To present a new technique for reconstructing higher-resolution depth maps using range gating imaging lidar.
To demonstrate the effectiveness of applying gate delays to enhance depth measurement capabilities.
To develop a simplified lidar system structure without compromising performance.

Main Methods:

A novel technique applying gate delays to each returned laser pulse in a range gating lidar system.

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Encoding the returned signal with consequent delays of the gate to extend scene depth.

Designing and implementing a multipulse gate-delayed range gating lidar system.

Main Results:

Achieved a significant improvement in depth resolution, from 6 meters down to 1.5 meters.
Demonstrated the feasibility of extending the depth of the scene by adjusting gate delays.
Maintained unchanged peak laser power, laser pulse widths, and sampling period.

Conclusions:

The proposed gate-delayed range gating lidar technique effectively enhances depth map resolution.
The multipulse gate-delayed system offers a simplified structure for improved lidar performance.
This advancement has the potential to benefit various applications requiring precise 3D environmental sensing.