Results 171 to 180 of about 2,611 (204)
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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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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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Accuracy of a new partial coherence interferometry analyser for biometric measurements
British Journal of Ophthalmology, 2009Precise biometry is an essential preoperative measurement for refractive surgery as well as cataract surgery. A new device based on partial coherence interferometry technology was tested and evaluated for accuracy of measurements.In a prospective study 200 eyes of 100 healthy phakic volunteers were examined with a functional prototype of the new ...
M P, Holzer, M, Mamusa, G U, Auffarth
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Partially multiplexing sensor network exploiting low coherence interferometry
Applied Optics, 1993A partially multiplexed fiber-optic-based sensor network based on low coherence interferometry is reported for which the scanning interferometer simultaneously sweeps the coherence-matched region of each sensor. The advantage of this approach is that the signal-to-noise ratio is maximized while the cross talk between sensors is minimized.
T Y, Liu, J, Cory, D A, Jackson
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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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Resolution of partially coherent objects by use of speckle interferometry*
Journal of the Optical Society of America, 1974The method of obtaining near-diffraction-limited information by averaging the modulus-squared Fourier-transformed radiant-flux density is applied to partially coherent light. The case of two point sources with arbitrary coherence properties and intensities is considered in detail.
M. G. Miller, D. Korff
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Journal of Cataract and Refractive Surgery, 2016
To evaluate the agreement between the measurements provided by a new optical biometer, the Aladdin, based on optical low-coherence interferometry (OLCI), and those provided by the most commonly used optical biometer (IOLMaster 500), based on partial-coherence interferometry (PCI).Multicenter clinical trial.Prospective evaluation of diagnostic test.In ...
Kenneth J, Hoffer +3 more
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To evaluate the agreement between the measurements provided by a new optical biometer, the Aladdin, based on optical low-coherence interferometry (OLCI), and those provided by the most commonly used optical biometer (IOLMaster 500), based on partial-coherence interferometry (PCI).Multicenter clinical trial.Prospective evaluation of diagnostic test.In ...
Kenneth J, Hoffer +3 more
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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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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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