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Multiband ellipsoidal, reflector feed system for Cassegrain radio telescopes
IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36, 1998This paper presents a multiband feed system intended to operate at S, X, K, and millimetre bands for a classical Cassegrain type radio telescope. The feed system consists of an ellipsoidal reflector confocal with the hyperboloidal reflector of the Cassegrain system.
M.A. Campo, J.L. Besada, L. de Haro
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Ellipsoidal reflector spotlights—a manufacturer's view
Lighting Design + Application, 1978These ellipsoids are designed to frame areas, project patterns, and create special effects. They are designed for throws of 14 to 140 ft
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Solar Furnace System Using Tower-Reflector with Ellipsoidal Mirror
SAE Technical Paper Series, 1999<div class="htmlview paragraph">A new solar furnace system using a stationary elliptic dish and heliostats is proposed. Since the elliptic dish has two focuses (an upper focus and a lower focus) for elliptic geometry, this system has three advantages.
O. Yokota +7 more
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Characterization of a spark source focused by an ellipsoidal reflector
The Journal of the Acoustical Society of America, 2013Air-coupled ultrasonic non-destructive testing (NDT) provides an ideal solution for rapid scanning of large specimens. Unfortunately, despite decades of research, many challenges remain to render air-coupled ultrasonic methods a broadly effective sensing modality for high impedance materials due to low energy transmission between air and the solids ...
Xiaowei Dai +3 more
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The radiation pattern of a surface loaded ellipsoidal reflector
IEEE Transactions on Antennas and Propagation, 1987The radiation patterns of the focus-fed axially symmetric and loaded ellipsoidal antennas in E - and H -planes are calculated by using the generalized method of geometrical theory of diffraction (GTD). The chosen loads are resistive types which are described in terms of surface impedances.
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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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Focusing of N waves in air by an ellipsoidal reflector
The Journal of the Acoustical Society of America, 1997An experimental investigation of the focusing of intense, airborne pressure pulses by an ellipsoidal reflector is reported. Short-duration N waves were generated by weak sparks at the near focus F1 of four different prolate ellipsoidal surfaces. Reflection then concentrated the rays at the far focus F2.
Wayne M. Wright, David T. Blackstock
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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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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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