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Investigation of scan errors in the three-element Risley prism pair.

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    This study establishes an error analysis model for three-element Risley-prism scan systems (TRSS), redefining error sources and their impact on pointing accuracy. An error compensation algorithm is developed for high-accuracy beam scanning in TRSS.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering
    • Beam Steering Technology

    Background:

    • Risley-prism scan systems (TRSS) are crucial for beam steering applications.
    • Accurate pointing is essential for TRSS performance.
    • Existing error analysis models may lack comprehensive detail.

    Purpose of the Study:

    • To establish a detailed error analysis model for TRSS.
    • To redefine and categorize error sources affecting pointing accuracy.
    • To develop an error compensation algorithm for high-accuracy beam scanning.

    Main Methods:

    • Development of a novel error analysis model for TRSS.
    • Redefinition and categorization of error sources.
    • Analytical and numerical simulations to present error impacts.
    • Design of an error compensation algorithm for thin prisms.

    Main Results:

    • The established error analysis model quantifies the impact of various error sources on pointing accuracy.
    • Graphical presentation of analytical and numerical results for error impact.
    • A developed error compensation algorithm enhances beam scanning accuracy in TRSS.

    Conclusions:

    • The developed error analysis model is applicable to any Risley-prism beam scan system.
    • The error compensation algorithm provides a method for high-accuracy beam scanning in TRSS.
    • This work contributes to the error calibration and performance enhancement of TRSS.