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Updated: Jan 25, 2026

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Alignment-tolerant single-shot digital holographic microscopy based on computer-controlled telecentricity.

Seong-Jin Park, Byung-Mok Kim, Eun-Soo Kim

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    |May 3, 2019
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    Summary

    A new alignment-tolerant telecentric digital holographic microscopy (AT-T-DHM) system uses computational compensation to correct optical errors. This method enables precise phase information retrieval for practical applications.

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    Area of Science:

    • Optics and Photonics
    • Microscopy Techniques
    • Computational Imaging

    Background:

    • Digital holographic microscopy (DHM) is a powerful imaging technique.
    • Telecentric imaging offers advantages in magnification consistency.
    • Misalignment in optical systems can introduce phase errors, degrading image quality.

    Purpose of the Study:

    • To propose and validate an alignment-tolerant telecentric digital holographic microscopy (AT-T-DHM) system.
    • To develop a computational method for compensating optical quadratic phase errors (O-QPE).
    • To enable practical implementation of telecentric DHM.

    Main Methods:

    • A three-step process: optical recording, computational compensation, and retrieving.
    • Utilizing a tube-lens-based two-beam interferometer for hologram recording.
    • Estimating and computationally balancing O-QPE from the recorded hologram.

    Main Results:

    • Successfully compensated for optical quadratic phase errors.
    • Retrieved object phase information from the compensated hologram.
    • Demonstrated virtual operation in a telecentric imaging mode.
    • Validated the system's feasibility through wave-optical analysis and experiments.

    Conclusions:

    • The proposed AT-T-DHM system effectively corrects phase errors caused by misalignment.
    • Computational compensation enables practical telecentric digital holographic microscopy.
    • The system offers a robust solution for high-fidelity holographic imaging.