Results 21 to 30 of about 55,264 (288)
Aberration-corrected cryoimmersion light microscopy [PDF]
Proceedings of the National Academy of Sciences, 2018 Significance Cryofluorescence imaging is of great interest in biological microscopy because vitrified samples (i.e., frozen without ice crystallization) are free from fixation artifacts, are highly photostable, and allow direct correlation with electron cryomicroscopy.
Raffaele Faoro +7 more
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The Aberration Corrected SEM [PDF]
AIP Conference Proceedings, 2005 The performance of the conventional low‐energy CD‐SEM is limited by the aberrations inherent in the probe forming lens. Multi‐pole correctors are now available which can reduce or eliminate these aberrations. An SEM equipped with such a corrector offers higher spatial resolution and more probe current from a given electron source, and other aspects of ...
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Correction of concentrated and distributed aberrations in medical ultrasound imaging [PDF]
, 1996 A method is presented for iterative correction of wave fields aberrated in a plane located at an arbitrary distance from an array transducer. The signals received from the transducer are processed by an inverse extrapolator in such a way that the output ...
Berkhoff, A.P., Thijssen, J.M.
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Automatic Modal Wavefront Estimation and Correction for Optical Aberration
IEEE Photonics Journal, 2019 Modal estimation of aberration can quantify the amount of aberration, which plays an important role in optical system optimization, aberration correction, and so on. Here, we propose a simple but effective method to find the modal wavefront of aberration.
Xiaomin Lai +4 more
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Sensors, 2023 Risley-prism-based image sensors can expand the imaging field of view through beam control. The larger the top angle of the prism, the higher the magnification of the field of view, but at the same time, it aggravates the problem of imaging aberrations ...
Zhonglin Lin +6 more
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Aberration Correction and Electron Holography [PDF]
Microscopy and Microanalysis, 2009 AbstractElectron holography has been shown to allow a posteriori aberration correction. Therefore, an aberration corrector in the transmission electron microscope does not seem to be needed with electron holography to achieve atomic lateral resolution.
Hannes, Lichte +3 more
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Holographic aberration correction: optimising the stiffness of an optical trap deep in the sample [PDF]
, 2011 We investigate the effects of 1st order spherical aberration and defocus upon the stiffness of an optical trap tens of μm into the sample. We control both these aberrations with a spatial light modulator. The key to maintain optimum trap stiffness over a
Bowman +22 more
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Ray Tracing Methods for Correcting Chromatic Aberrations in Imaging Systems
International Journal of Optics, 2014 The correction of chromatic aberrations is typically performed using aberration formulas or by using real ray tracing. While the use of aberration formulas might be effective for some simple optical systems, it has limitations for complex and fast ...
Dmitry Reshidko +2 more
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Numerical correction of anti-symmetric aberrations in single HRTEM images of weakly scattering 2D-objects [PDF]
, 2014 Here, we present a numerical post-processing method for removing the effect of anti-symmetric residual aberrations in high-resolution transmission electron microscopy (HRTEM) images of weakly scattering 2D-objects.
Chen, Ming-Wei +6 more
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Applied Sciences, 2022 Delay-and-sum (DAS) beamforming of backscattered echoes is used for conventional ultrasound imaging. Although DAS beamforming is well suited for imaging in soft tissues, refraction, scattering, and absorption, porous mineralized tissues cause phase ...
Huong Nguyen Minh +2 more
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