A Super-Resolution Imaging Technique in Acoustical Passive Imaging Systems Using Spherical Detection and Least Squared Estimation of Hologram

Author(s):  
Kimio SASAKI ◽  
Shinji SASAKI
2017 ◽  
Vol 15 (08) ◽  
pp. 1740005 ◽  
Author(s):  
Andrzej Chrostowski ◽  
Rafał Demkowicz-Dobrzański ◽  
Marcin Jarzyna ◽  
Konrad Banaszek

We consider the problem of characterizing the spatial extent of a composite light source using the super-resolution imaging technique based on mode demultiplexing when the centroid of the source is not known precisely. We show that the essential features of this problem can be mapped onto a simple qubit model for joint estimation of a phase shift and a dephasing strength.


2020 ◽  
Vol 238 ◽  
pp. 06002
Author(s):  
Stephane Perrin ◽  
Sylvain Lecler ◽  
Paul Montgomery

Microsphere-assisted microscopy is a new imaging technique which allows the diffraction limit to be overcome using transparent microspheres. It makes it possible to reach a resolution of up to 100 nm in air while being label-free and full-field. An overview of the imaging technique is presented showing the influence of the photonic jet on the image nature and the unconventional behaviour of the magnification factor. Moreover, interferometry through microspheres is demonstrated for the 3D reconstruction of nanoelements.


Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 364
Author(s):  
Meiting Wang ◽  
Jiajie Chen ◽  
Lei Wang ◽  
Xiaomin Zheng ◽  
Jie Zhou ◽  
...  

The super-resolution imaging technique of structured illumination microscopy (SIM) enables the mixing of high-frequency information into the optical transmission domain via light-source modulation, thus breaking the optical diffraction limit. Correlative SIM, which combines other techniques with SIM, offers more versatility or higher imaging resolution than traditional SIM. In this review, we first briefly introduce the imaging mechanism and development trends of conventional SIM. Then, the principles and recent developments of correlative SIM techniques are reviewed. Finally, the future development directions of SIM and its correlative microscopies are presented.


Nano Letters ◽  
2019 ◽  
Vol 20 (4) ◽  
pp. 2197-2208 ◽  
Author(s):  
Mingshu Zhang ◽  
Zhifei Fu ◽  
Changqing Li ◽  
Anyuan Liu ◽  
Dingming Peng ◽  
...  

2014 ◽  
Vol 104 (6) ◽  
pp. 061117 ◽  
Author(s):  
Arash Darafsheh ◽  
Nicholaos I. Limberopoulos ◽  
John S. Derov ◽  
Dennis E. Walker ◽  
Vasily N. Astratov

Nanoscale ◽  
2017 ◽  
Vol 9 (39) ◽  
pp. 14907-14912 ◽  
Author(s):  
Anna Bezryadina ◽  
Jinxing Li ◽  
Junxiang Zhao ◽  
Alefia Kothambawala ◽  
Joseph Ponsetto ◽  
...  

A LPSIM super resolution imaging technique with a movable microlens improves the NA of the system and resolves details down to λ/10.


Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 222
Author(s):  
Rakesh Dhama ◽  
Bing Yan ◽  
Cristiano Palego ◽  
Zengbo Wang

All-dielectric superlens made from micro and nano particles has emerged as a simple yet effective solution to label-free, super-resolution imaging. High-index BaTiO3 Glass (BTG) microspheres are among the most widely used dielectric superlenses today but could potentially be replaced by a new class of TiO2 metamaterial (meta-TiO2) superlens made of TiO2 nanoparticles. In this work, we designed and fabricated TiO2 metamaterial superlens in full-sphere shape for the first time, which resembles BTG microsphere in terms of the physical shape, size, and effective refractive index. Super-resolution imaging performances were compared using the same sample, lighting, and imaging settings. The results show that TiO2 meta-superlens performs consistently better over BTG superlens in terms of imaging contrast, clarity, field of view, and resolution, which was further supported by theoretical simulation. This opens new possibilities in developing more powerful, robust, and reliable super-resolution lens and imaging systems.


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