high numerical aperture
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2021 ◽  
Vol 147 ◽  
pp. 106734
Author(s):  
Yong-Qiang Liu ◽  
Jinhai Sun ◽  
Yingchao Shu ◽  
Lujun Wu ◽  
Lan Lu ◽  
...  

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Jörg S. Eismann ◽  
Martin Neugebauer ◽  
Klaus Mantel ◽  
Peter Banzer

AbstractMeasuring the aberrations of optical systems is an essential step in the fabrication of high precision optical components. Such a characterization is usually based on comparing the device under investigation with a calibrated reference object. However, when working at the cutting-edge of technology, it is increasingly difficult to provide an even better or well-known reference device. In this manuscript we present a method for the characterization of high numerical aperture microscope objectives, functioning without the need of calibrated reference optics. The technique constitutes a nanoparticle, acting as a dipole-like scatterer, that is placed in the focal volume of the microscope objective. The light that is scattered by the particle can be measured individually and serves as the reference wave in our system. Utilizing the well-characterized scattered light as nearly perfect reference wave is the main idea behind this manuscript.


2021 ◽  
Author(s):  
Hieu Thao Nguyen ◽  
Oleg Soloviev ◽  
D Russell Luke ◽  
Michel Verhaegen

Abstract We develop for the first time a mathematical framework in which the class of projection algorithms can be applied to high numerical aperture (NA) phase retrieval. Within this framework, we first analyze the basic steps of solving the high-NA phase retrieval problem by projection algorithms and establish the closed forms of all the relevant projection operators. We then study the geometry of the high-NA phase retrieval problem and the obtained results are subsequently used to establish convergence criteria of projection algorithms in the presence of noise. Making use of the vectorial point-spread-function (PSF) is, on the one hand, the key difference between this paper and the literature of phase retrieval mathematics which deals with the scalar PSF. The results of this paper, on the other hand, can be viewed as extensions of those concerning projection methods for low-NA phase retrieval. Importantly, the improved performance of projection methods over the other classes of phase retrieval algorithms in the low-NA setting now also becomes applicable to the high-NA case. This is demonstrated by the accompanying numerical results which show that available solution approaches for high-NA phase retrieval are outperformed by projection methods.


2021 ◽  
Author(s):  
Inhwa Kang ◽  
Jang-Gun Park ◽  
Minwoo Kim ◽  
Jun-Hyeong Lee ◽  
Hye-Keun Oh

2021 ◽  
Vol 9 (10) ◽  
pp. 2095
Author(s):  
Bumın K. Yildırım ◽  
Hamza Kurt ◽  
Mirbek Turduev

2021 ◽  
Author(s):  
Yong-Qiang Liu ◽  
Jinhai Sun ◽  
Kainan Qi ◽  
Yongxing Che ◽  
Liangsheng Li ◽  
...  

2021 ◽  
Vol 13 (4) ◽  
pp. 1-8
Author(s):  
Jia-Lin Du ◽  
Wei Yan ◽  
Li-Wei Liu ◽  
Fan-Xing Li ◽  
Fu-Ping Peng ◽  
...  

Author(s):  
Olivier Lévêque ◽  
Romain Duverger ◽  
Hervé SAUER ◽  
Caroline Kulcsar ◽  
Francois Goudail

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