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Related Experiment Video

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Tilting double-prism scanner driven by cam-based mechanism.

Anhu Li, Wanli Yi, Wansong Sun

    Applied Optics
    |July 21, 2015
    PubMed
    Summary

    A novel cam-based mechanism enables precise real-time control for double prism scanners, achieving high-accuracy orientation and position tracking. This innovation offers a new pathway for passively tracking target trajectories with minimal error.

    Area of Science:

    • Optics and Photonics
    • Mechanical Engineering
    • Control Systems

    Background:

    • Orthogonal tilting prisms offer submicroradian tracking accuracy for orientation and position.
    • Real-time nonlinear control of prism tilting angles is critical for target trajectory tracking.
    • Previous work established the feasibility of prism-based tracking systems.

    Purpose of the Study:

    • To investigate a cam-based mechanism for real-time nonlinear control of double prism scanners.
    • To transfer the control problem to the design of a cam configuration.
    • To analyze the dynamic characteristics and performance of the proposed tracking mechanism.

    Main Methods:

    • Developing a cam-based mechanism to control prism tilting angles.
    • Establishing the mapping relation between prism angles and cam configuration curves.

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  • Analyzing the dynamic characteristics and the impact of tilting speeds on tracking performance.

    • Main Results:

    • A cam-based mechanism was designed and implemented for prism angle control.
    • The system demonstrated a tracking error of less than 0.375% compared to the target trajectory.
    • Dynamic characteristics and the influence of tilting speeds were thoroughly analyzed.

    Conclusions:

    • The cam-based mechanism provides an effective solution for real-time nonlinear control of tilting double-prism scanners.
    • This approach simplifies the control problem by translating it into a cam design task.
    • The developed tracking mechanism presents a novel avenue for passive target tracking applications.