Analytical and experimental demonstration of depth of field extension for incoherent imaging system with a standard sinusoidal phase mask

2012 ◽  
Vol 10 (3) ◽  
pp. 031101-31104 ◽  
Author(s):  
Hui Zhao Hui Zhao ◽  
Yingcai Li Yingcai Li
Keyword(s):  
Imaging System ◽  
Field Extension ◽  
Phase Mask ◽  
Depth Of Field ◽  
Experimental Demonstration ◽  
Incoherent Imaging

Cubic sinusoidal phase mask: Another choice to extend the depth of field of incoherent imaging system

2010 ◽  
Vol 42 (4) ◽  
pp. 561-569 ◽  
Author(s):  
Hui Zhao ◽  
Yingcai Li ◽  
Huajun Feng ◽  
Zhihai Xu ◽  
Qi Li
Keyword(s):  
Imaging System ◽  
Phase Mask ◽  
Depth Of Field ◽  
Incoherent Imaging

An extended depth-of-field imaging system with a non-rotationally symmetric phase mask

2018 ◽  
Vol 89 (10) ◽  
pp. 103101 ◽  
Author(s):  
Hongbo Xie ◽  
Lirong He ◽  
Lei Yang ◽  
Chensheng Mao ◽  
Meng Zhu ◽  
...  
Keyword(s):  
Imaging System ◽  
Phase Mask ◽  
Depth Of Field ◽  
Rotationally Symmetric ◽  
Extended Depth Of Field ◽  
Field Imaging ◽  
Symmetric Phase

Optimized non-integer order phase mask to extend the depth of field of an imaging system

2016 ◽  
Vol 374 ◽  
pp. 92-96 ◽  
Author(s):  
Jiang Liu ◽  
Erlong Miao ◽  
Yongxin Sui ◽  
Huaijiang Yang
Keyword(s):  
Imaging System ◽  
Phase Mask ◽  
Depth Of Field ◽  
Integer Order

scholarly journals Resolving 500 nm axial separation by multi-slice X-ray ptychography

2019 ◽  
Vol 75 (2) ◽  
pp. 336-341 ◽  
Author(s):  
Xiaojing Huang ◽  
Hanfei Yan ◽  
Yan He ◽  
Mingyuan Ge ◽  
Hande Öztürk ◽  
...  
Keyword(s):  
Imaging System ◽  
Axial Direction ◽  
Depth Of Field ◽  
Experimental Demonstration ◽  
Thick Sample ◽  
X Ray ◽  
Wavefront Propagation ◽  
Propagation Effects ◽  
20 Nm ◽  
Frequency Features

Multi-slice X-ray ptychography offers an approach to achieve images with a nanometre-scale resolution from samples with thicknesses larger than the depth of field of the imaging system by modeling a thick sample as a set of thin slices and accounting for the wavefront propagation effects within the specimen. Here, we present an experimental demonstration that resolves two layers of nanostructures separated by 500 nm along the axial direction, with sub-10 nm and sub-20 nm resolutions on two layers, respectively. Fluorescence maps are simultaneously measured in the multi-modality imaging scheme to assist in decoupling the mixture of low-spatial-frequency features across different slices. The enhanced axial sectioning capability using correlative signals obtained from multi-modality measurements demonstrates the great potential of the multi-slice ptychography method for investigating specimens with extended dimensions in 3D with high resolution.

scholarly journals Investigation of extended depth-of-field f/8 camera with optimized cubic phase mask and digital restoration

2020 ◽  
Vol 238 ◽  
pp. 03008
Author(s):  
Po-Sheng Chiu ◽  
Kurt Vonmetz ◽  
Federico Canini ◽  
H. Paul Urbach
Keyword(s):  
Mean Squared Error ◽  
Imaging System ◽  
Optimal Solution ◽  
Phase Mask ◽  
Depth Of Field ◽  
Cubic Phase ◽  
Modulation Transfer ◽  
Original Design ◽  
Digital Restoration ◽  
Extended Depth Of Field

An investigation of extended depth-of-field camera with optimized phase mask and digital restoration is presented. The goal of this paper is to implement the wavefront coding technique without affecting much of the original design, and the design has taken the complexity of imaging system into consideration. The optimized strength of cubic phase mask (CPM) is based on the analytical optimal solution for the task-based imaging system [J. Opt. Soc. Am. A 25, 1064 (2008)]. The noisy intermediate images of CPM system with highest spatial frequency of interest can be effectively restored by vector-based Richardson-Lucy algorithm. Restoration from the system with generalized CPM produces precise image position than the system with CPM does. In general, the CPM system procures modulation transfer function higher than 0.195 in the whole depth-of-field, and the mean squared error of the restored images are less than 5 %.

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