An extended depth-of-field imaging system with a non-rotationally symmetric phase mask
Review of Scientific Instruments, ISSN: 1089-7623, Vol: 89, Issue: 10, Page: 103101
2018
- 6Citations
- 2Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
Optical imaging system offers best performance across a range of applications such as machine vision, medical examination, security, and quality inspection in a production line. A typical imaging system is commonly sensitive to the defocus variations in the object plane location, which largely loses the transversal information of volume and brings inaccuracy to the comprehensive vision. Therefore, improvement of depth-of-field (DOF) with high resolution imaging remains a challenge for the conventional imaging system. Here we introduce a newly designed optical imaging system, mainly being composed of a standard Tessar lens and a non-absorptive rectangularly separable phase mask, whose corresponding optical point spread function is greatly invariant to defocus. An extended DOF image is restored by using the Tikhonov regularization algorithm and deconvolving the response function of the optical system. The proof-of-the-concept experimental results verify significantly extended DOF exceeding 40 times compared to the common optical imaging counterparts. Future work includes the use of a durable and high-transmittance phase mask to develop various large DOF optical configurations without loss of resolution.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85054487519&origin=inward; http://dx.doi.org/10.1063/1.5023292; http://www.ncbi.nlm.nih.gov/pubmed/30399722; https://pubs.aip.org/rsi/article/89/10/103101/364355/An-extended-depth-of-field-imaging-system-with-a; http://aip.scitation.org/doi/10.1063/1.5023292; https://aip.scitation.org/doi/10.1063/1.5023292
AIP Publishing
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