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Sharpness-statistics-based auto-focusing algorithm for optical ptychography
Optics and Lasers in Engineering, 2020Abstract In ptychography, the precise diffraction distance is critical to recover the object with high quality. An auto-focus algorithm is proposed which consists of a rough focusing step and a fine focusing step. These two steps make the sharpness statistics for the amplitude reconstructed from a single diffraction pattern and the amplitude ...
Rui Ma +8 more
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A Microchannel With Repeated Sharp Corners for Single Stream Particle Focusing
ASME 2014 12th International Conference on Nanochannels, Microchannels and Minichannels, 2014A new microfluidic device for fast and high throughput microparticle focusing is reported. The particle focusing is based on the combination of inertial lift force effect and centrifugal force effect generated in a microchannel with a series of repeated sharp corners on one side of the channel wall.
Liangliang Fan +4 more
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Sharp focusing of partially coherent Bessel-correlated beams by a graded-index lens
Optics Letters, 2023The nonparaxial focusing of partially coherent Bessel-correlated beams carrying vortices by a graded-index lens is investigated using the decomposition of the incident field into coherent modes and the quantum mechanical operator method. The influence of the coherence state and the incident beam aperture on tight focusing is analyzed.
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A Sharp-Focusing Schlieren System
Journal of the Aeronautical Sciences, 1950ARTHUR KANTROWITZ, ROBERT L. TRIMPI
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Periodically focused propagation-invariant beams with sharp central peak
Optics Communications, 2003The existence of a new class of longitudinally periodic beams with sharply defined central peak is predicted. The intensity patterns of such beams are well reproduced at the equidistant transverse planes passing through nodal focal points on the propagation axis.
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Composition of sharp-focused image by rotation of Scheimpflug camera
Optics & Laser Technology, 2022Sooyeong Yi, Sungjae Min
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Design and Applications of a Sharp Focusing Schlieren System
52nd Aerospace Sciences Meeting, 2014Brian T. Brooker +3 more
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Field at sharp focusing of shifted single-ring Laguerre–Gauss modes with circular polarization
2023Ilya Golub +2 more
exaly
Simulation of the Wavefront Aberrations Influence at Sharp Focusing
2025 Photonics & Electromagnetics Research Symposium - Fall (PIERS-Fall)P. A. Khorin +2 more
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