Results 171 to 180 of about 15,879 (217)
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Repeat-Pass SAR Interferometry With Partially Coherent Targets
IEEE Transactions on Geoscience and Remote Sensing, 2012By means of the permanent scatterer (PS) technique, repeated spaceborne synthetic aperture radar (SAR) images with relatively low resolution (about 25 m × 5 m for the European Remote Sensing (ERS) and Envisat satellites) can be used to estimate the displacement (1-mm precision) and 3-D location (1-m precision) of targets that show an unchanged ...
Daniele Perissin, Teng Wang
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Preoperative biometry of cataractous eyes using partial coherence laser interferometry
Graefe's Archive for Clinical and Experimental Ophthalmology, 2003Preoperative measurement of the axial length of the eye is of utmost importance in cataract surgery to determine the relationship between the refractive power of the intraocular lens to be implanted and the postoperative refractive error of the eye.
Stefan, Häsemeyer +2 more
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Comparison of Two Partial Coherence Interferometry Devices for Ocular Biometry
Klinische Monatsblätter für Augenheilkunde, 2010An estimation of the repeatability of the Lenstar LS 900 biometry parameters and comparison of these measurements to those evaluated with the IOLMaster were carried out.Axial length, corneal curvature, anterior chamber depth, central corneal thickness and lens thickness measurements were performed in 145 eyes using the Lenstar LS 900, while axial ...
Z, Liampa +3 more
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Improved prediction of intraocular lens power using partial coherence interferometry
Journal of Cataract and Refractive Surgery, 2001To evaluate the feasibility of using a new optical biometry technique, dual-beam partial coherence interferometry (PCI), to improve intraocular lens (IOL) power prediction in cataract surgery.Department of Ophthalmology, Vienna General Hospital, and Institute of Medical Physics, University of Vienna, Vienna, Austria.Preoperative axial length (AL) data ...
O, Findl +5 more
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High precision biometry of pseudophakic eyes using partial coherence interferometry
Journal of Cataract and Refractive Surgery, 1998To investigate the applicability of the scanning version of dual-beam partial coherence interferometry (PCI) for measuring the anterior segment and axial length of pseudophakic eyes in a clinical setting and to determine the achievable precision with this biometry technique.Department of Ophthalmology, Vienna General Hospital, and Institute of Medical ...
O, Findl +4 more
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Speckle interferometry for a partially-coherent source
1979 Antennas and Propagation Society International Symposium, 2005Abstract : We have obtained the spatial frequency transfer function for speckle interferometry for the case when the source is partially coherent (spatially) and can be approximated by the quasi-stationary model. The transfer function has been examined, and relatively simple approximations to it have been found for the limiting cases of low and high ...
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Two-pion interferometry for a partially coherent evolution source
Chinese Physics C, 2008We give the formulas of two-pion Hanbury-Brown-Twiss (HBT) correlation function for a partially coherent evolution pion-emitting source, using quantum probability amplitudes in a path-integral formalism. The multiple scattering of the particles in the source is taken into consideration based on Glauber scattering theory.
Li Jian-Wei, Yu Li-Li, Zhang Wei-Ning
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Journal of Cataract and Refractive Surgery, 2003
To compare and contrast axial length (AL) measurements assessed by ultrasound biometry and optical biometry.Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany.Optical biometry and ultrasound biometry were performed in 360 eyes to measure AL.In eyes with a clear-appearing crystalline lens, there was a statistically significant ...
Mana, Tehrani +3 more
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To compare and contrast axial length (AL) measurements assessed by ultrasound biometry and optical biometry.Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany.Optical biometry and ultrasound biometry were performed in 360 eyes to measure AL.In eyes with a clear-appearing crystalline lens, there was a statistically significant ...
Mana, Tehrani +3 more
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Comparison of partial coherence interferometry and ultrasound for anterior segment biometry
Journal of Cataract and Refractive Surgery, 2009To assess the performance of a partial coherence interferometry (PCI)-based device for the determination of anterior segment biometry.Clinica Centrofama, Cartagena, Murcia, Spain.Central corneal thickness (CCT), anterior chamber depth (ACD), and lens thickness (LT) were measured with the ACMaster PCI anterior segment biometer and an Echoscan US-1800 ...
Francisco, Lara +4 more
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Ultrasound and Partial Coherence Interferometry With Measurement of Central Corneal Thickness
Journal of Refractive Surgery, 2006ABSTRACT PURPOSE: To compare noncontact pachymeter measurements with ultrasound pachymeter measurements and assess their reproducibility. METHODS: Central corneal thickness was measured in 104 eyes of 56 patients with three laser interference pachymeters (OLCR [Haag Streit, Könitz, Switzerland], OCP [4optics AG, Lübeck, Germany ...
Martin Michael, Much, Wolfgang, Haigis
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