Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Jin-Min Wu"'
Autor:
Feng Zhang, Ming-Feng Lu, Zhe Liu, Peihang Li, Jin-Min Wu, Chen-Chen Ji, Chenyang Wang, Ran Tao
Publikováno v:
Applied optics. 60(13)
By analyzing Newton’s rings, often encountered in interferometry, the parameters of spherical surfaces such as the rings’ center and the curvature radius can be estimated. First, the classical convolutional neural networks, visual geometry group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99428284162228890b860f3d715cc7b7
https://pubmed.ncbi.nlm.nih.gov/33983335
https://pubmed.ncbi.nlm.nih.gov/33983335
Publikováno v:
Optical Technology and Measurement for Industrial Applications 2020.
Interferometry is a widely used optical measurement technique. We can estimate the physical parameters of the measured object by analyzing the phase of the fringe pattern obtained by interference imaging. However, when the measurement object has sphe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd6f8ce02c0fd50b5c27f22fb75a2d51
https://doi.org/10.1117/12.2574765
https://doi.org/10.1117/12.2574765
Publikováno v:
Optics and Lasers in Engineering. 91:178-186
Newton’s rings are often encountered in interferometry, and in analyzing them, we can estimate the physical parameters, such as curvature radius and the rings’ center. The fractional Fourier transform (FRFT) is capable of estimating these physica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19d1a507d2a74dabd325c509dff5fa03
Publikováno v:
Modeling Aspects in Optical Metrology VII.
Newton’s rings are the fringe patterns of quadratic phase, the curvature radius of optical components can be obtained from the coefficients of quadratic phase. Usually, the coordinate transformation method has been used to the curvature radius, how
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c22e525dca7ee6f1bad447ee0fd65ad4
https://doi.org/10.1117/12.2525807
https://doi.org/10.1117/12.2525807
Publikováno v:
Modeling Aspects in Optical Metrology VII.
A method based on the fractional Fourier ridges for accurate phase demodulation of a single interferogram with quadratic phase is presented. The interferograms being analyzed may contain circular, elliptic or astigmatic fringes. In signal processing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63ea2a5292d7bbaafe6c6fa8bb4e033d
https://doi.org/10.1117/12.2524878
https://doi.org/10.1117/12.2524878
Publikováno v:
Applied optics. 58(13)
Analysis of closed-fringe patterns with quadratic phase that are often encountered plays an important role in optical interferometry. But because the frequency spectra of the two exponential signals that compose closed-fringe patterns overlap in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebf567735136bdeb7ac187c9d3e7648b
https://pubmed.ncbi.nlm.nih.gov/31044850
https://pubmed.ncbi.nlm.nih.gov/31044850
Publikováno v:
Optical Design and Fabrication 2019 (Freeform, OFT).
An improved FRFT-based method for estimating parameters from Newton’s rings is proposed that can estimate parameters in about 1.3 seconds when processing a 1920×1080 pixel image of Newton’s rings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da197b446be1a6b0f07dc13509f40145
https://doi.org/10.1364/oft.2019.ow4a.5
https://doi.org/10.1364/oft.2019.ow4a.5
Publikováno v:
Optical Engineering. 59:1
Our study investigated an object-detection method based on the faster region-based convolutional neural network (faster R-CNN). The method was designed to determine the center of either a concentric circle or concentric ellipse. Specifically, the cen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::828cbb0f7315461cafe2a4b10c70d64b
https://doi.org/10.1117/1.oe.59.1.014115
https://doi.org/10.1117/1.oe.59.1.014115
Publikováno v:
Optical Engineering. 58:1
Phase extraction from a single closed interferogram with a quadratic phase plays an important role in optical interferometry. Based on the energy of the interference images of this type is concentrated in a very narrow range around a point in the fra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1594b1c1780955e285a5ecc87ab0be44
https://doi.org/10.1117/1.oe.58.9.094104
https://doi.org/10.1117/1.oe.58.9.094104
Publikováno v:
Applied Optics. 58:3926
By analyzing Newton's rings, often encountered in interferometry, using fractional Fourier transform (FRFT), we can estimate the physical parameters, such as the curvature radius of the spherical surface and the rings' center. However, parameter esti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::983aac125fd3053da2d5b1aef250ae28
https://doi.org/10.1364/ao.58.003926
https://doi.org/10.1364/ao.58.003926