Super-resolution imaging via aperture modulation and intensity extrapolation

Xu, Baojun; Wang, Zhiqiang; He, J.

doi:10.1038/s41598-018-33416-9

Cited by 20 publications

(7 citation statements)

References 23 publications

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“…Developing a high-performance optical imaging system that can provide expected output images in the presence of different optical aberrations with different techniques and methods is important and technically feasible. Generally, engineering the point spread function (PSF) of optical tools is a technique employed in various potential applications [1][2][3][4][5][6]. A simple way to engineer the PSF of optical tools is achieved with pupil filters [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Effect of a Parabolic Apodizer on Improving the Imaging of Optical Systems with Coma and Astigmatism Aberrations

Reddy,

Dev,

Pal

et al. 2023

Photonics

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We present the results of improving resolution in the imaging of two closely spaced point sources with an optical system under the influence of apodization and different types of aberrations. In particular, we consider the effect of coma and astigmatism, which are well-known aberrations that can deteriorate the resolution of an optical imaging system. Furthermore, a parabolic apodizer was included in an optical system to improve its imaging capabilities. We found that the two-point imaging performance of an optical system with a parabolic apodizer strongly depends on the coherence conditions of incident light. Furthermore, to analyze the efficiency of the parabolic apodizer, we compared the results of two-point imaging obtained with apodized and unapodized optical systems for distances between the two-point sources, less than or equal to the diffraction limit of an optical system. Moreover, the results of imaging the USAF chart with a parabolic apodizer are presented to show the apodizer’s efficacy in single-object imaging. Our results can be applied to the imaging of closely moving structures in microscopy, resolving dense spectral lines in spectroscopy experiments, and developing systems useful for resolving the images of closely associated far-distance objects in astronomical observations.

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Section: Introductionmentioning

confidence: 99%

The Effect of a Parabolic Apodizer on Improving the Imaging of Optical Systems with Coma and Astigmatism Aberrations

Reddy,

Dev,

Pal

et al. 2023

Photonics

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show abstract

“…spatial frequency of the point spread function (PSF) of the system due to wave diffraction [1]. Methods for increasing image resolutions beyond the diffraction limit [1], i.e., superresolution, have been studied in various areas such as astronomy [2], electromagnetics (radar [3] and time reversal imaging [4]), underwater acoustics (sonar) [5], acoustics [6], optics (review) [7], and ultrasound (reviews) [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

Modulation of Point Spread Function for Super-Resolution Imaging

2023

Preprint

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A four-dimensional (4D) general super-resolution imaging method (called PSF modulation method) was developed via modulation of an arbitrary point-spread-function (PSF) of an imaging system such as an ultrasound and optical system. The highest image resolution achievable will only be limited by the noises in the images. Theory, computer simulations, and experiments were presented. A pulse-echo image of a super-resolution (0.65 mm versus a two-way diffraction-limited resolution of 2.65 mm, or 4.08-fold improvement) and 31-dB signal-to-noise ratio (SNR) was obtained with an ultrasound experiment using a 0.5-mm diameter modulator and 1.483-mm wavelength. Another ultrasound experiment shows that a wave source was imaged at a super-resolution (0.5 mm versus a one-way diffraction limited resolution of 3.63 mm, or 7.26-fold improvement) at about 30-dB SNR, using the same modulator size and wavelength. In addition, a PSF-weighted super-resolution imaging method based on the PSF modulation method was developed. This method is easier to implement but may have some limitations. With a proper choice of a modulator (e.g., a quantum dot) and imaging system, nanoscale (a few nanometers) imaging is possible using the methods developed.

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“…The principle of aperture modulation and intensity extrapolation (AMIE) are described in a recent report [9] as a sequence of images obtained with the same imaging system but different aperture sizes. The image sequence is used to fit the intensity function of the aperture size at each position on the image plane.…”

Section: Introductionmentioning

confidence: 99%

Modeling of corona virus and its application in confocal microscopy

Hamed

2022

Beni-Suef Univ J Basic Appl Sci

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Background The proposal of spiky apertures showed resolution improvement compared with the circular apertures. Three models of corona virus are given. The 1st model consists of uniform circular aperture provided with 8 spikes while the 2nd model has 16 spikes for the same uniform circular aperture. The 3rd model has circular linear distribution with 8 spikes. Results The Normalized Point Spread Function (PSF) or the impulse response is computed for the three models using fast Fourier transform technique. In addition, the autocorrelation function corresponding to these apertures is calculated and compared with that corresponding to the ordinary circular and conic apertures. Coronavirus image is used as an object in the formation of images using confocal scanning laser microscope provided with suggested models. The fabricated MATLAB code is used to compute and plot all images and line plots. Conclusions The PSF plots are computed from Eqs. (8) and (12) using MATLAB code showing narrower cutoff in the PSF for spiky aperture compared with that corresponding to the uniform circular aperture and modulated linear and quadratic apertures. Hence, I reached resolution improvement in the case of spiky aperture.

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Super-resolution imaging via aperture modulation and intensity extrapolation

Cited by 20 publications

References 23 publications

The Effect of a Parabolic Apodizer on Improving the Imaging of Optical Systems with Coma and Astigmatism Aberrations

The Effect of a Parabolic Apodizer on Improving the Imaging of Optical Systems with Coma and Astigmatism Aberrations

Modulation of Point Spread Function for Super-Resolution Imaging

Modeling of corona virus and its application in confocal microscopy

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