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

Authors :
Chiu Po-Sheng
Vonmetz Kurt
Canini Federico
Urbach H. Paul
Source :
EPJ Web of Conferences, Vol 238, p 03008 (2020)
Publication Year :
2020
Publisher :
EDP Sciences, 2020.

Abstract

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 %.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
2100014X
Volume :
238
Database :
Directory of Open Access Journals
Journal :
EPJ Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.bfc5be58cc24af9aa35bd87416d9cf5
Document Type :
article
Full Text :
https://doi.org/10.1051/epjconf/202023803008