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    A new method designs compact imaging systems using multiple flat phase elements. This approach enables faster, more efficient development for applications like virtual and augmented reality.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering

    Background:

    • Conventional optical systems face limitations in compactness and alignment.
    • Aspherical and freeform optics offer improvements but can be complex to design and manufacture.
    • Flat phase elements provide a promising alternative for compact and lightweight optical systems.

    Purpose of the Study:

    • To propose a novel design method for off-axis nonsymmetric imaging systems using multiple flat phase elements.
    • To develop a framework for efficiently generating phase profiles based on system specifications.
    • To demonstrate the feasibility of the method with a high-performance compact system example.

    Main Methods:

    • The design process starts with simple geometric planes.
    • Phase profiles are generated point-by-point using multiple field and pupil ray tracing.
    • Closed-form phase functions are derived by integrating real space and phase function space.
    • The method acts as a fast phase retrieval technique.

    Main Results:

    • A novel design method for multi-flat-element imaging systems was successfully developed.
    • The method allows for rapid and effective design of complex optical systems.
    • A high-performance compact system was designed as a proof of concept.

    Conclusions:

    • The proposed design method offers a compact, lightweight, and easily aligned solution for imaging systems.
    • This approach is versatile and applicable to various fields including virtual reality, augmented reality, miniature cameras, and microscopy.
    • The method facilitates the integration of multiple optical functions into a single flat element.