Results 321 to 330 of about 594,035 (375)
Visual Distortions in Human Amblyopia Are Correlated with Deficits in Contrast Sensitivity. [PDF]
J NeurosciOlianezhad F +5 more
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AJN, American Journal of Nursing, 2022
A nurse remembers Dr. Fauci's impact during the early days of the AIDS crisis.
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A nurse remembers Dr. Fauci's impact during the early days of the AIDS crisis.
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Applied Optics, 1995
A grating-pair device is useful for producing negative group velocity dispersion of temporal optical signals. When high dispersion is needed or large bandwidth is involved, higher-order dispersion terms become significant. The grating triplet is a new approach to create dispersion that can produce negative or positive group-velocity dispersion without ...
D, Mendlovic, O, Melamed
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A grating-pair device is useful for producing negative group velocity dispersion of temporal optical signals. When high dispersion is needed or large bandwidth is involved, higher-order dispersion terms become significant. The grating triplet is a new approach to create dispersion that can produce negative or positive group-velocity dispersion without ...
D, Mendlovic, O, Melamed
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Displacement measuring grating interferometer: a review
Frontiers of Information Technology & Electronic Engineering, 2019A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacement measurements. In contrast to a laser interferometer, a grating interferometer is insensitive to the air refractive index and can be easily applied to
P. Hu +5 more
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Novel immersion grating, VPH grating and quasi-Bragg grating
SPIE Proceedings, 2006We have successfully fabricated germanium immersion gratings with resolving power of 45,000 at 10 μm by using a nano precision 3D grinding machine and ELID (ELectrolytic In-process Dressing) method. However the method spends large amount of machine times.
Noboru Ebizuka +17 more
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Grating interferometers for producing large holographic gratings
Applied Optics, 1990Methods for producing large holographic diffraction gratings are described. In particular, the advantages of using a grating interferometer illuminated with a noncollimated beam from either an extended monochromatic source or an extended polychromatic source are described along with some of the problems that arise and methods to solve them ...
R R, Hershey, E N, Leith
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1975 Ultrasonics Symposium, 1975
A simple acoustic scanning device has been devised in which a chirped SAW beam is converted into a focused scanning bulk wave beam by coherent scattering from a grating of parallel grooves. The device can operate in both transmitting and receiving modes, and is applicable to the acoustic imaging of objects in real time.
A. Ro/nnekleiv, J. Souquet, H. J. Shaw
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A simple acoustic scanning device has been devised in which a chirped SAW beam is converted into a focused scanning bulk wave beam by coherent scattering from a grating of parallel grooves. The device can operate in both transmitting and receiving modes, and is applicable to the acoustic imaging of objects in real time.
A. Ro/nnekleiv, J. Souquet, H. J. Shaw
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Science, 2004
Chiral gratings with double helix symmetry were produced by twisting glass optical fiber with a noncircular core cross section as it passed through a miniature oven. We observed polarization-selective transmission in chiral fibers with pitches of tens of micrometers. Two modes of optical interaction were differentiated.
Victor I, Kopp +5 more
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Chiral gratings with double helix symmetry were produced by twisting glass optical fiber with a noncircular core cross section as it passed through a miniature oven. We observed polarization-selective transmission in chiral fibers with pitches of tens of micrometers. Two modes of optical interaction were differentiated.
Victor I, Kopp +5 more
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Optics Letters, 2003
A circular Dammann grating that can produce circular equal intensities at various orders in the far field is described. A set of parameters such as order, circular number, uniformity, and diffraction efficiency has been defined to describe the novel diffractive phase elements.
Changhe, Zhou, Jia, Jia, Liren, Liu
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A circular Dammann grating that can produce circular equal intensities at various orders in the far field is described. A set of parameters such as order, circular number, uniformity, and diffraction efficiency has been defined to describe the novel diffractive phase elements.
Changhe, Zhou, Jia, Jia, Liren, Liu
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Physical Review Letters, 2004
We propose a method of optical waveguiding, which relies on Bragg diffractions from a 1D grating that gives rise to waveguiding in the direction normal to the grating wave vector. The waveguide structure consists of a shallow 1D grating that has a bell- or trough-shaped amplitude in the confinement direction.
Cohen, Oren +4 more
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We propose a method of optical waveguiding, which relies on Bragg diffractions from a 1D grating that gives rise to waveguiding in the direction normal to the grating wave vector. The waveguide structure consists of a shallow 1D grating that has a bell- or trough-shaped amplitude in the confinement direction.
Cohen, Oren +4 more
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