Results 241 to 250 of about 857,162 (283)

Quantitative phase imaging unit

Optics Letters, 2014
A simple and cost-effective method is presented for quantitative phase imaging. A common-path lateral phase shifting interferometer is realized through attaching a compact filter set to the output port of an existing microscope. The working principles, design criteria, and limitations are also derived and explained.
KyeoReh, Lee, YongKeun, Park
openaire   +3 more sources

Phase Resolution Measurement in Quantitative Phase Imaging

Frontiers in Optics + Laser Science 2023 (FiO, LS), 2023
Small-phase-difference mask structures are fabricated and tested to estimate the phase resolution measurable in quantitative phase imaging.
O. Joseph Ibiyemi, Benjamin Panuski, Shengtao Yu, Pranav P. Kulkarni, Thomas K. Gaylord   +4 more
openaire   +1 more source

Quantitative phase imaging for medical diagnosis

Journal of Biophotonics, 2016
Optical microscopy is an indispensable diagnostic tool in modern healthcare. As a prime example, pathologists rely exclusively on light microscopy to investigate tissue morphology in order to make a diagnosis. While advances in light microscopy and contrast markers allow pathologists to visualize cells and tissues in unprecedented detail, the ...
Majeed, Hassaan, Sridharan, Shamira, Mir, Mustafa, Ma, Lihong, Min, Eunjung, Jung, Woonggyu, Popescu, Gabriel   +6 more
openaire   +3 more sources

Scaling down quantitative phase imaging

Nature Photonics, 2020
Quantitative phase gradient images can now be captured in a single shot thanks to the use of two layers of compact, multifunctional dielectric metasurfaces.
YoonSeok Baek, YongKeun Park
openaire   +1 more source

Quantitative Phase Imaging Flow Cytometry

Biomedical Optics and 3-D Imaging, 2012
This paper introduces a fluidics based focus-stack collecting microscope. Images from the focus stacks are used to reconstruct the quantitative phase of red blood cells in flow with the Transport-of-Intensity-Equation method.
Sai Siva Gorthi, Ethan Schonbrun
openaire   +1 more source

Real-time Quantitative Phase Imaging

Optics in the Life Sciences, 2013
Using new advances in quantitative phase imaging and parallel computing, we demonstrate a real-time blood testing system that can provide remote diagnosis with minimal human intervention in economically challenging areas.
Hoa V. Pham, Basanta Bhaduri, Krishnarao Tangella, Catherine Best-Popescu, Gabriel Popescu   +4 more
openaire   +1 more source

Quantitative ultrasonic phased array imaging

AIP Conference Proceedings, 2014
When imaging with ultrasonic phased arrays, what do we actually image? What quantitative information is contained in the image? Ad-hoc delay-and-sum methods such as the synthetic aperture focusing technique (SAFT) and the total focusing method (TFM) fail to answer these questions.
Brady J. Engle, Lester W. Schmerr, Jr., Alexander Sedov   +2 more
openaire   +1 more source

Quantitative phase imaging: introduction

Journal of the Optical Society of America A
Quantitative phase imaging (QPI), propelled by advancements in digital holography and computational imaging, has revolutionized the ability to retrieve phase delays with high precision. Over the past two decades, the field has seen tremendous growth, contributing to numerous applications in biomedicine and material metrology, including live cell ...
Chenfei Hu, Seung Ah Lee, Yang Liu, YongKeun Park, Peter T. C. So, Renjie zhou   +5 more
openaire   +1 more source

Quantitative phase imaging in biomedicine

Nature Photonics, 2018
Quantitative phase imaging (QPI) has emerged as a valuable method for investigating cells and tissues. QPI operates on unlabelled specimens and, as such, is complementary to established fluorescence microscopy, exhibiting lower phototoxicity and no photobleaching. As the images represent quantitative maps of optical path length delays introduced by the
YongKeun Park, Christian Depeursinge, Gabriel Popescu   +2 more
openaire   +2 more sources

Quantitative Phase Imaging in Microscopy

2009
Phase imaging can be used in a reflection or transmission geometry. In biology it has the advantage of being marker-free. It can measure physical shape, and refractive index variations, ideally in three dimensions (3D). In transmission, phase is related to optical path difference.
Colin JR Sheppard, Shan S Kou, Shalin Mehta   +2 more
openaire   +1 more source