scholarly journals Single-shot phase reconstruction based on beam splitting encoding and averaging

2021 ◽  
Author(s):  
Yingming Xu ◽  
Xingchen Pan ◽  
Cheng Liu ◽  
Jianqiang Zhu
Keyword(s):  
Single Shot ◽  
Phase Reconstruction ◽  
Beam Splitting

On-line beam diagnostics based on single-shot beam splitting phase retrieval

2018 ◽  
Vol 16 (9) ◽  
pp. 091001 ◽  
Author(s):  
Xi He Xi He ◽  
Cheng Liu Cheng Liu ◽  
Jianqiang Zhu Jianqiang Zhu
Keyword(s):  
Phase Retrieval ◽  
Single Shot ◽  
Beam Diagnostics ◽  
Beam Splitting ◽  
On Line ◽  
Line Beam

Single-shot Fourier ptychography based on diffractive beam splitting

2018 ◽  
Vol 43 (2) ◽  
pp. 214 ◽  
Author(s):  
Xiaoliang He ◽  
Cheng Liu ◽  
Jianqiang Zhu
Keyword(s):  
Single Shot ◽  
Beam Splitting

scholarly journals High-Resolution Scanning Coded-Mask-Based X-ray Multi-Contrast Imaging and Tomography

2021 ◽  
Vol 7 (12) ◽  
pp. 249
Author(s):  
Zhi Qiao ◽  
Xianbo Shi ◽  
Michael Wojcik ◽  
Lahsen Assoufid
Keyword(s):  
High Resolution ◽  
Dark Field ◽  
Superior Performance ◽  
Single Shot ◽  
Phase Reconstruction ◽  
Contrast Imaging ◽  
Full Field ◽  
X Ray ◽  
Coded Mask

Near-field X-ray speckle tracking has been used in phase-contrast imaging and tomography as an emerging technique, providing higher contrast images than traditional absorption radiography. Most reported methods use sandpaper or membrane filters as speckle generators and digital image cross-correlation for phase reconstruction, which has either limited resolution or requires a large number of position scanning steps. Recently, we have proposed a novel coded-mask-based multi-contrast imaging (CMMI) technique for single-shot measurement with superior performance in efficiency and resolution compared with other single-shot methods. We present here a scanning CMMI method for the ultimate imaging resolution and phase sensitivity by using a coded mask as a high-contrast speckle generator, the flexible scanning mode, the adaption of advanced maximum-likelihood optimization to scanning data, and the multi-resolution analysis. Scanning CMMI can outperform other speckle-based imaging methods, such as X-ray speckle vector tracking, providing higher quality absorption, phase, and dark-field images with fewer scanning steps. Scanning CMMI is also successfully demonstrated in multi-contrast tomography, showing great potentials in high-resolution full-field imaging applications, such as in vivo biomedical imaging.

Single-shot phase retrieval based on beam splitting

2018 ◽  
Vol 57 (17) ◽  
pp. 4832 ◽  
Author(s):  
Xi He ◽  
Xinchen Pan ◽  
Cheng Liu ◽  
Jianqiang Zhu
Keyword(s):  
Phase Retrieval ◽  
Single Shot ◽  
Beam Splitting

scholarly journals Variational Hilbert Quantitative Phase Imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Maciej Trusiak ◽  
Maria Cywińska ◽  
Vicente Micó ◽  
José Ángel Picazo-Bueno ◽  
Chao Zuo ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Phase Imaging ◽  
Single Shot ◽  
Quantitative Phase Imaging ◽  
Phase Reconstruction ◽  
Quantitative Phase ◽  
Wide Range ◽  
High Space ◽  
Variational Image

AbstractUtilizing the refractive index as the endogenous contrast agent to noninvasively study transparent cells is a working principle of emerging quantitative phase imaging (QPI). In this contribution, we propose the Variational Hilbert Quantitative Phase Imaging (VHQPI)—end-to-end purely computational add-on module able to improve performance of a QPI-unit without hardware modifications. The VHQPI, deploying unique merger of tailored variational image decomposition and enhanced Hilbert spiral transform, adaptively provides high quality map of sample-induced phase delay, accepting particularly wide range of input single-shot interferograms (from off-axis to quasi on-axis configurations). It especially promotes high space-bandwidth-product QPI configurations alleviating the spectral overlapping problem. The VHQPI is tailored to deal with cumbersome interference patterns related to detailed locally varying biological objects with possibly high dynamic range of phase and relatively low carrier. In post-processing, the slowly varying phase-term associated with the instrumental optical aberrations is eliminated upon variational analysis to further boost the phase-imaging capabilities. The VHQPI is thoroughly studied employing numerical simulations and successfully validated using static and dynamic cells phase-analysis. It compares favorably with other single-shot phase reconstruction techniques based on the Fourier and Hilbert–Huang transforms, both in terms of visual inspection and quantitative evaluation, potentially opening up new possibilities in QPI.

Sign in / Sign up

Export Citation Format

Share Document