Super resolution imaging achieved by using on-axis interferometry based on a Spatial Light Modulator

Recently, the super-oscillation phenomenon has attracted attention because of its ability to super-resolve unlabelled objects in the far-field. Previous synthesis of super-oscillatory point-spread functions used the Chebyshev patterns where all sidelobes are equal. In this work, an approach is introduced to generate super-oscillatory Taylor-like point-spread functions that have tapered sidelobes. The proposed method is based on the Schelkunoff’s super-directive antenna theory. This approach enables the super-resolution, the first sidelobe level and the tapering rate of the sidelobes to be controlled. Finally, we present the design of several imaging experiments using a spatial light modulator as an advanced programmable grating to form the Taylor-like super-oscillatory point-spread functions and demonstrate their superiority over the Chebyshev ones in resolving the objects of two apertures and of a mask with the letter E.

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Super-resolution imaging in digital holography by using dynamic grating with a spatial light modulator

Optics and Lasers in Engineering ◽

10.1016/j.optlaseng.2014.09.015 ◽

2015 ◽

Vol 66 ◽

pp. 279-284 ◽

Cited By ~ 7

Author(s):

Qiaowen Lin ◽

Dayong Wang ◽

Yunxin Wang ◽

Lu Rong ◽

Shifeng Chang

Keyword(s):

Spatial Light Modulator ◽

Digital Holography ◽

Super Resolution ◽

Light Modulator ◽

Resolution Imaging ◽

Dynamic Grating

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SISSI Project: A Feasibility Study for a Super Resolved Compressive Sensing Multispectral Imager in the Medium Infrared

Engineering Proceedings ◽

10.3390/engproc2021008028 ◽

2021 ◽

Vol 8 (1) ◽

pp. 28

Author(s):

Cinzia Lastri ◽

Gabriele Amato ◽

Massimo Baldi ◽

Tiziano Bianchi ◽

Maria Fabrizia Buongiorno ◽

...

Keyword(s):

Energy Consumption ◽

Compressive Sensing ◽

Feasibility Study ◽

Spatial Resolution ◽

Spatial Light Modulator ◽

Super Resolution ◽

Earth Observation ◽

Light Modulator ◽

The Core ◽

Multispectral Imager

This paper describes the activities related to a feasibility study for an Earth observation optical payload, operating in the medium infrared, based on super-resolution and compressive sensing techniques. The presented activities are running in the framework of the ASI project SISSI, aiming to improve ground spatial resolution and mitigate saturation/blooming effects. The core of the payload is a spatial light modulator (SLM): a bidimensional array of micromirrors electronically actuated. Thanks to compressive sensing approach, the proposed payload eliminates the compression board, saving mass, memory and energy consumption.

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Restoring single-molecule localizations with wavefront sensing adaptive optics for deep-tissue super-resolution imaging

10.1101/2021.11.18.469175 ◽

2021 ◽

Author(s):

Sanghyeon Park ◽

Yonghyeon Jo ◽

Minsu Kang ◽

Jin Hee Hong ◽

Sangyoon Ko ◽

...

Keyword(s):

Adaptive Optics ◽

Single Molecule ◽

Fluorescence Emission ◽

Super Resolution ◽

Light Modulator ◽

Application Range ◽

Wavefront Distortion ◽

Resolution Imaging ◽

Localization Precision ◽

Major Factors

Specimen-induced aberration has been one of the major factors limiting the imaging depth in single-molecule localization microscopy (SMLM). In this study, we measured the wavefront of intrinsic reflectance signal at the fluorescence emission wavelength to construct a time-gated reflection matrix and find complex tissue aberration without resorting to fluorescence detection. Physically correcting the identified aberration via wavefront shaping with a liquid-crystal spatial light modulator (SLM) enables super-resolution imaging even when the aberration is too severe for initiating localization processes. We demonstrate the correction of complex tissue aberration, the root-mean-square (RMS) wavefront distortion of which is more than twice the 1 rad limit presented in previous studies; this leads to the recovery of single molecules by 77 times increased localization number. We visualised dendritic spines in mouse brain tissues and early myelination processes in a whole zebrafish at up to 102 μm depth with 28-39 nm localization precision. The proposed approach can expand the application range of SMLM to thick samples that cause the loss of localization points owing to severe aberration.

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