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Updated: Mar 16, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Ultrathin zoom telescopic objective.

Lei Li, Di Wang, Chao Liu

    Optics Express
    |August 10, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed an ultrathin zoom telescopic objective using an annular folded lens and electrowetting liquid lenses. This compact design significantly reduces the overall length for advanced imaging applications.

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    Area of Science:

    • Optics and Photonics
    • Miniaturized Imaging Systems

    Background:

    • Conventional zoom telescopic objectives often suffer from bulky designs.
    • The demand for compact and high-performance optical systems is increasing in various fields.

    Purpose of the Study:

    • To develop an ultrathin zoom telescopic objective with continuous zoom capability.
    • To demonstrate a compact zoom telescopic camera system.

    Main Methods:

    • Integration of an annular folded lens for primary focal power.
    • Utilizing three electrowetting liquid lenses for zoom functionality.
    • Employing a multiple-fold design to reduce lens thickness to approximately 1.98mm.

    Main Results:

    • Achieved a tunable focal length ranging from approximately 48mm to 65mm.
    • The objective has an aperture of approximately 15mm.
    • The total system length is approximately 18mm, a significant reduction compared to conventional designs.

    Conclusions:

    • The proposed ultrathin zoom telescopic objective offers a highly compact solution.
    • The design enables continuous zoom change in a reduced volume.
    • Demonstrated potential for advanced miniaturized imaging devices.