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Enhanced scanning agility using a double pair of Risley prisms.

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    This study introduces a novel dual-Risley-prism scanner for lidar 3D mapping, enhancing flexibility and control. This advanced scanner allows for increased point density and uniform sampling in lidar applications.

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    Area of Science:

    • Optics and Photonics
    • Robotics and Automation
    • Geospatial Technology

    Background:

    • Single-pair Risley prism scanners offer robustness and precision for continuous operation.
    • Existing scanners lack flexibility for advanced lidar 3D mapping applications.
    • Compactness and robustness are key requirements for lidar scanning systems.

    Purpose of the Study:

    • To develop a novel scanner with enhanced flexibility for lidar 3D mapping.
    • To improve sampling point density and uniformity in scanned areas.
    • To enable dynamic sampling of areas of interest during motion.

    Main Methods:

    • Implementation of a dual-pair Risley prism scanner system.
    • Utilizing a narrower field-of-view (FOV) first prism pair.
    • Employing a wider FOV second prism pair to position the first pair's scan pattern.

    Main Results:

    • The dual-Risley-prism system provides increased flexibility without additional components.
    • Achieved capability to increase sampling point density in specific locations.
    • Demonstrated ability to enhance sampling uniformity across the scanned area.
    • Enabled continuous sampling of a specific area of interest even during scanner motion.

    Conclusions:

    • The novel dual-Risley-prism scanner significantly enhances lidar 3D mapping capabilities.
    • This design offers greater control over sampling strategies for improved data acquisition.
    • The scanner maintains compactness and robustness, suitable for demanding applications.