Efficient, gigapixel-scale, aberration-free whole slide scanner using angular ptychographic imaging with closed-form solution

Posted by dbos Caltech

Kavli Affiliate: Changhuei Yang | First 5 Authors: Shi Zhao, Haowen Zhou, Siyu Lin, Ruizhi Cao, Changhuei Yang | Summary: Whole slide imaging provides a wide field-of-view (FOV) across cross-sections of biopsy or surgery samples, significantly facilitating pathological analysis and clinical diagnosis. Such high-quality images that enable detailed visualization of cellular and tissue structures are […]


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Off-axis Hartmann wavefront sensing for the GMT-Consortium Large Earth Finder (G-CLEF) red camera optics

Posted by dbos Harvard

Kavli Affiliate: David Charbonneau | First 5 Authors: Matthew C. H. Leung, Colby A. Jurgenson, Andrew Szentgyorgyi, Brian McLeod, Cem Onyuksel | Summary: The Hartmann test is a method used to measure the wavefront error in a focal optical system, wherein a mask with a pattern of small holes is placed at the system’s aperture […]


Continue.. Off-axis Hartmann wavefront sensing for the GMT-Consortium Large Earth Finder (G-CLEF) red camera optics

Spectral instability of black holes: relating the frequency domain to the time domain

Posted by dbos Peking

Kavli Affiliate: Lijing Shao | First 5 Authors: Yiqiu Yang, Zhan-Feng Mai, Run-Qiu Yang, Lijing Shao, Emanuele Berti | Summary: Recent work has shown that the quasinormal mode spectrum of black holes is unstable under small perturbations (of order $epsilon$) of the radial potential, while the early time-domain ringdown waveform is only marginally affected. In […]


Continue.. Spectral instability of black holes: relating the frequency domain to the time domain