Results 191 to 200 of about 443 (222)
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Focusing of an N wave by an ellipsoidal reflector: An experiment in air
The Journal of the Acoustical Society of America, 1989An airborne experiment to model the intense pulse field developed by a lithotripter is in progress. The reflector is half an ellipsoid, machined from an aluminum block and having the following dimensions: major axis 280 mm, minor axis 140 mm, eccentricity 0.866, distance from aperture plane to either focus 121 mm.
Stephen T. W. Cheng +3 more
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Longitudinal pumping by an ellipsoidal reflector for short-wavelength lasers
Soft-X-Ray Projection Lithography, 1991We have designed and tested an ellipsoidal reflector to pump short-wavelength lasers by soft x-ray radiation from laser produced plasma. A gaseous medium supplied by a slit nozzle was pumped longitudinally along the optical axis in the region of the second focus. Soft x-ray absorption and VUV emission of gaseous medium have been investigated.
Katsumi Midorikawa +3 more
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The caustic fields of offset ellipsoidal reflectors: a comparative study
International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's, 1990The conditions under which the GTD (geometrical theory of diffraction) and Gaussian beam solutions are able to specify the phase and magnitude of the fields around the caustics of offset ellipsoidal reflectors are examined. This is done through the comparison of these methods with the near-field physical optics solution (PO).
P.O. Iversen, Y. Rahmat-Samii
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Acoustic and cavitation fields of a pressure release ellipsoidal reflector
The Journal of the Acoustical Society of America, 1997In an electrohydraulic lithotripter (device to treat kidney stones), an underwater spark at the near focus of a rigid ellipsoidal reflector produces acoustic cavitation at the far focus. A reflector made of pressure release foam, however, dramatically reduces cavitation with little change in acoustic pressure amplitude (∼ +35 MPa, ∼−10 MPa).
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Ellipsoidal Reflector for Longitudinal Pumping of Soft X-Ray Lasers
Topical Meeting on Short Wavelength Coherent Radiation: Generation and Applications, 1986We propose a new geometry for collecting and focusing soft x-ray radiation from a laser-produced plasma which offers collection efficiencies greater than 20% and aspect ratios of more than 50. This combination typically results in (power density) x (length) improvements of 30 relative to present transverse multiple-spot geometries. Longitudinal pumping
J. F. Young, J. J. Macklin, S. E. Harris
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Intensified cavitation produced with pressure release and rigid ellipsoidal reflectors.
The Journal of the Acoustical Society of America, 1996An underwater bubble is well known to grow in response to a strong negative acoustic pulse and then collapse because of inertial forces. Here it is shown that adding an auxiliary positive pulse after collapse begins intensifies the collapse. The negative-then-positive pulse sequence is produced by two ellipsoidal reflectors, each with an electrical ...
Michael R. Bailey, David T. Blackstock
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ELLIPSOID REFLECTOR DESIGN TO USE IN ARCHITECTURAL LIGHTING
2008The luminaire is the main tool to set up a lighting arrangement in an interior which provides the good visual conditions completely. The fundamental aim of luminaire design is to send the light of a lamp, emitting in almost all directions, in the desired directions. The control of lamp light is generally possible by reflection of light. Therefore, most
YAĞMUR, Şensin +2 more
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Focusing of shock waves in water by different ellipsoidal reflectors
AIP Conference Proceedings, 1990Spherical shock waves generated by an underwater sparkgap or an explosive pellet in the first focus of different ellipsoidal segments are focused after reflection in the second focus. Shadowgraphs give an impression of the converging process whereas the field measurement is done by self‐designed piezoelectric pvdf‐needleprobes.Two different series of ...
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A Confocal Ellipsoidal Reflector System for Millimeter-Wave Applications
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT), 2022Mohammad Hossein Koohi Ghamsari +2 more
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Optical Engineering, 1986
The isoangle and isobragg are new concepts used in mapping loci of incident and reflected rays associated with a dispersive reflector. An isoangle is a line joining the points of incidence at which the angle of incidence of rays from a point source is the same.
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The isoangle and isobragg are new concepts used in mapping loci of incident and reflected rays associated with a dispersive reflector. An isoangle is a line joining the points of incidence at which the angle of incidence of rays from a point source is the same.
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