Long range detection of line-array multi-pulsed coding lidar by combining the Accumulation coherence and...

Area of Science:

• Optics and Photonics
• Sensor Technology
• Computer Vision

Background:

• Traditional time-of-flight (TOF) imaging faces limitations in detection range and signal-to-noise ratio.
• Advancements in detector technology, such as Geiger-mode avalanche photo detectors (APD), offer potential for improved performance.

Purpose of the Study:

• To present a multi-pulsed line-array push broom lidar system utilizing Geiger-mode APDs for enhanced depth imaging.
• To investigate the effectiveness of signal enhancement techniques for improving lidar performance.

Main Methods:

• Employed a multi-pulsed line-array push broom lidar system with Geiger-mode APDs.
• Integrated light coding technology with a diode-pumped solid-state laser (10kHz repetition rate, 5µJ pulses).
• Applied signal enhancement methods: accumulation-coherence and high-accuracy energy detection.

Main Results:

• Demonstrated practical and effective signal retrieval and denoising for both simulated and real-world data.
• Achieved improved decode effects and extended detection range through combined signal enhancement techniques.
• Validated the system's performance through experimental results and theoretical analysis.

Conclusions:

• The developed lidar system offers a practical and effective solution for TOF depth imaging.
• System performance can be further enhanced by increasing the scale of the array sensor and the number of code bits.
• The proposed methods show significant potential for long-range 3D mapping and sensing applications.