Coded aperture structured illumination digital holographic microscopy for superresolution imaging

Xin Ji Lai, Han Yen Tu, Yu Chih Lin, Chau Jern Cheng

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)


    This paper proposes a coded aperture structured illumination (CASI) technique in digital holographic microscopy (DHM). A CASI wave is generated using two binary phase codes (0° and 120°) for spatial phase shifting. The generated CASI wave then interferes with a reference wave to form a coded Fresnel hologram at a single exposure with compressive sensing (CS) to avoid the temporal phase-shifting process of the structured illumination (SI). The CS algorithm is applied to retrieve the missing data of decoded phase-shifted SI-modulated waves, which are used to separate overlapped spatial frequencies for obtaining a larger spatial frequency coverage to provide superresolution imaging. Two phase-only spatial light modulators are applied to generate a directional SI pattern for obtaining a coded aperture with a suitable size to perform one-shot acquisition in the DHM system.

    Original languageEnglish
    Pages (from-to)1143-1146
    Number of pages4
    JournalOptics Letters
    Issue number5
    Publication statusPublished - 2018 Mar 1

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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