Incoherent, non-invasive and non-scanning superoscillation-based microscope for super-resolution imaging

Xie, Qingkun; Jiang, Yanru; Liang, Jian; Qu, Enshi; Ren, Liyong

doi:10.1016/j.optcom.2020.125445

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…While incoherent illumination sources have been used for SO imaging previously, they were utilized for a different purpose, namely, broadband super-resolution imaging or imaging an in-phase two-aperture object . Crucially, these methods rely on the main beam’s FWHM for imaging, and thus they suffer from the same SNR limitations discussed previously.…”

Section: Introductionmentioning

confidence: 99%

“…While incoherent illumination sources have been used for SO imaging previously, they were utilized for a different purpose, namely, broadband super-resolution imaging 21 or imaging an inphase two-aperture object. 22 Crucially, these methods rely on the main beam's FWHM for imaging, and thus they suffer from the same SNR limitations discussed previously. Our work, on the other hand, uses incoherence as a means to achieve high-SNR SO imaging via deconvolution and via engineered PSFs whose high frequencies occur well beyond the main beam.…”

Section: Introductionmentioning

confidence: 99%

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Computational Nonscanning Incoherent Superoscillatory Imaging

et al. 2021

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Superoscillatory (SO) imaging is an emerging technique to super-resolve unlabeled objects in the far-field. Reducing the full width at half-maximum (FWHM) of the main beam is a standard method used in SO imaging to pursue a finer resolution. However, reducing the FWHM dims the main beam sharply. This results in very poor signal-to-noise ratios that are beyond the capability of conventional image sensors. We present an approach that does not seek to reduce the FWHM of the main beam. Instead, we describe an imaging system whose SO point spread function is very broad, yet preserves sufficiently high frequencies to enable sharp image reconstruction by computational deconvolution. A key observation in this work is that deconvolution-based SO imaging is only possible for SO systems that are incoherent; we show how to realize such a system with a red light-emitting diode and a programmable spatial light modulator. This system enables the application of standard deconvolution algorithms to image subdiffraction objects in a single shot without any form of scanning. Overall, we demonstrate computational SO imaging of previously unseen 2D complex objects with a submicron resolution that is one-fifth the diffraction limit.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computational Nonscanning Incoherent Superoscillatory Imaging

et al. 2021

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Dark-field super-oscillatory microscopy with high-pass super-oscillatory filters

Shen,

Ou,

Zhang

2024

Results in Optics

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Single-shot extended-object super-oscillatory imaging

2023

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A point-spread function (PSF) that locally oscillates faster than its highest Fourier component can reconstruct the sub-diffraction information of objects in the far field without any near-field placements to break the diffraction limit. However, the spatial capacity of such super-oscillatory (SO) PSFs for carrying sub-diffraction information is restricted by high sidelobes surrounding a desired region of interest (ROI). Here, we propose generalized periodic SO masks without optimization to push the ROI borders away for imaging extended objects. Our imaging experiments without any image post-processing demonstrate single-shot extended-object SO imaging with extended ROIs more than ten times the size of some typical ROIs (around 2λ/NA) and a sub-wavelength resolution of 0.49λ. The SO sub-wavelength resolution (0.7 times the diffraction limit) remains robust to additive noise with a signal-to-noise ratio above 13 dB. Our method is applicable to lifting the ROI size restrictions for various SO applications such as high-density data storage, acoustic SO imaging, super-narrow frequency conversion, and temporal SO pulses.

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Incoherent, non-invasive and non-scanning superoscillation-based microscope for super-resolution imaging

Cited by 6 publications

References 41 publications

Computational Nonscanning Incoherent Superoscillatory Imaging

Computational Nonscanning Incoherent Superoscillatory Imaging

Dark-field super-oscillatory microscopy with high-pass super-oscillatory filters

Single-shot extended-object super-oscillatory imaging

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