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Digitally switchable multi-focal lens using freeform optics.

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    Researchers developed a novel digitally switchable multi-focal lens (MFL) for tunable optical power. This innovative optical lens rapidly switches between multiple foci, enhancing imaging and display technologies.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering
    • Display Technology

    Background:

    • Electrically tunable optical power is crucial for advanced applications like virtual/augmented reality and microscopy.
    • Existing optical systems often lack rapid switching capabilities between multiple focal points.

    Purpose of the Study:

    • To present a novel design and prototype of a digitally switchable multi-focal lens (MFL).
    • To demonstrate rapid switching of optical power among multiple foci using a new optical system.

    Main Methods:

    • The MFL design integrates a freeform singlet with a programmable optical shutter array (POSA).
    • Time-multiplexed multiple foci are achieved by electrically controlling the POSA to redirect light through different lens segments.
    • A proof-of-concept prototype for a multi-foci imaging system was experimentally validated.

    Main Results:

    • Successful demonstration of a digitally switchable multi-focal lens (MFL) prototype.
    • Achieved rapid switching of optical power between multiple focal points.
    • Validated the system's potential for multi-foci imaging applications.

    Conclusions:

    • The developed MFL offers a novel solution for electrically tunable optical power with multi-focal capabilities.
    • This technology has broad applicability in imaging and display systems, including virtual and augmented reality.
    • The prototype validates the feasibility of rapid, electrically controlled multi-focal imaging.