Results 221 to 230 of about 55,390 (274)

Statistics and reduction of speckle in optical coherence tomography

Optics Letters, 2000
Studies have shown that optical coherence tomography (OCT) is useful in imaging microscopic structures through highly scattering media. Because spatially coherent light is used in OCT, speckle in the reconstructed image is unavoidable, resulting in degradation of the quality of the OCT images and impaired ability to differentiate subsurface structures.
M, Bashkansky, J, Reintjes
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Even and odd q-coherent states and their optical statistics properties

Journal of Physics A: Mathematical and General, 1993
Summary: We construct explicitly even and odd \(q\)-coherent states \((qCSs)\), which are proved to form a representation of the quantum Heisenberg-Weyl algebra, and study their properties. It is shown that optical statistics properties of the even and odd \(qCSs\) are very different.
Wang, Fabo, Kuang, Leman
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The study of optical statistical properties and coherence for XFEL

14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 2019
A X-ray free-electron laser (XFEL) facility is based on RF superconducting accelerator at China Academy of Engineering Physics (CAEP) has been planed. The facility will be designed in a radiation range of 0.3-4 angstrom and the electron beam energy will be 12GeV.
Yuhuan Dou, Shuai Liu, Xiaojian Shu, Xiaozhong He, Yiding Li, Linwen Zhang   +5 more
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Thickness estimation with optical coherence tomography and statistical decision theory

SPIE Proceedings, 2015
Thickness estimation, which has a broad range of applications, plays an important role in the field of optical metrology. In this study, we investigate a new approach—combining optical coherence tomography (OCT) and statistical decision theory—for thickness estimation.
Jinxin Huang, Jianing Yao, Nick Cirucci, Trevor Ivanov, Jannick P. Rolland   +4 more
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Thickness Estimation with Optical Coherence Tomography and Statistical Decision Theory

2013 CIOMP-OSA Summer Session on Optical Engineering, Design and Manufacturing, 2013
We implement a maximum-likelihood (ML) estimator to interpret Optical Coherence Tomography (OCT) data, based on a Fourier-Domain OCT and a two-interface tear film model. We use the root mean square error as a figure of merit to quantify the system performance to estimate the tear film thickness.
Jinxin Huang, Eric Clarkson, Matthew Kupinski, Jannick P. Rolland   +3 more
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Optical-coherence tomography of a dense tissue: statistics of attenuation and backscattering

Physics in Medicine and Biology, 1994
This paper addresses fundamental issues that underlie the interpretation of images acquired from turbid tissues by optical-coherence tomography (OCT). The attenuation and backscattering properties of freshly excised rat arteries and their dependence on the focusing and collection optics of the OCT system were measured at two wavelengths in the near ...
J M, Schmitt, A, Knüttel, M, Yadlowsky, M A, Eckhaus   +3 more
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Optical statistical classifiers using coherent and incoherent light

Applied Optics, 1979
Breast thermograms are digitally classified by means of a principal component analysis of a training set of breast spectral differences obtained in coherent light. The results are compared to the usual partition in categories of medical diagnosis. The statistical operators initiating the classification being expressed in terms of spatial frequencies ...
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A novel approach for forensic identification of automotive paints using optical coherence tomography and multivariate statistical methods

Journal of Forensic Sciences, 2022
AbstractAutomotive paint is one of the most important evidence in solving vehicle‐related criminal cases. It contains the critical information about the suspected vehicle, providing essential clues for the investigation. In this study, a novel approach based on optical coherence tomography combined with multivariate statistical methods was proposed to ...
Di, Wu, Qiong, Wu, Yifan, Lu, Chengming, Wang, Siyi, Yv, Lei, Wang, Haoran, Zeng, Yijian, Sun, Zhigang, Li, Shuhui, Gao, Ning, Zhang   +10 more
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Coherence holography and photon-correlation holography: marriage between holography and statistical optics

SPIE Proceedings, 2011
We review two techniques of unconventional holography, coherence holography and photon-correlation holography, which we recently proposed and experimentally demonstrated. We will emphasize the importance of noticing mathematical analogies in optics and physical phenomena, which give insights into the methodology for developing new techniques.
Mitsuo Takeda, Wei Wang, Dinesh N. Naik
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Speckle statistics in optical coherence tomography and speckle reduction by frequency compounding

Optical Coherence Tomography and Coherence Techniques, 2003
In this paper we are investigating the possibility of a frequency compounding method for speckle reduction in optical coherence tomography. The method is based on incoherent summation of the magnitudes of two independent interferometric signals, which were recorded at two different center wavelengths simultaneously.
Michael Pircher, Erich Goetzinger, Rainer Leitgeb, Adolf F. Fercher, Christoph K. Hitzenberger   +4 more
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