Results 181 to 190 of about 443 (222)
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A Radiant-Energy Heater Using an Ellipsoidal Reflector
IBM Journal of Research and Development, 1957The effectiveness of a radiant-energy heater employing a hemi-ellipsoidal aluminum reflector and an incandescent lamp as radiation source is illustrated by application to the zone-melting of germanium. The factors affecting the design and performance of this heater are discussed.
Edward H. Nicollian +2 more
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Ray tracing in ellipsoidal reflectors for optical biometry of media
Applied Optics, 2017In this paper, an analytical basis of ray tracing for optical biometry of media by ellipsoidal reflectors was developed. A ray-tracing algorithm was created, which involves determining the point of interaction of the incident beam with the ellipsoidal reflector, calculating the direction of the reflected beam, and determining the intersection point of ...
M. A. Bezuglyi +2 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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Aberrations of Ellipsoidal Reflectors for Unit Magnification
Applied Optics, 1974Ellipsoidal reflectors are useful for the 1:1 imaging of small objects without spherical and chromatic aberration. The magnitude of the off-axis aberrations of such reflectors is computed by application of Fermat's principle to the Hamiltonian point characteristic. The limiting form of the mirror aperture for which these aberrations do not exceed a set
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Optical biometry of biological tissues by ellipsoidal reflectors
SPIE Proceedings, 2013Possibilities of measuring systems that uses ellipsoidal reflectors for determining the optical parameters of biological tissue are studied. The modified inverse Monte Carlo method was designed for biomedical photometric system “biological tissue - ellipsoidal mirror”.
M. A. Bezuglyi, N. V. Pavlovets
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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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Blood glucose analysis by Raman spectrophotometer with ellipsoidal reflector
Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2021, 2021Authors considered the possibility of designing a non-invasive biomedical Raman spectrophotometer for the near infrared range using an ellipsoidal reflector as a collecting and focusing optical element to evaluation the biological media components, particularly glucose level.
Andrii Haponiuk +7 more
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The non-invasive optical glucometer prototype with ellipsoidal reflectors
2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2018The work is devoted to analyze the possibilities of creation of non-invasive optical glucometer based on photometry by ellipsoidal reflectors and Raman spectroscopy. The principles of optical glucose meter with ellipsoidal reflectors prototype development were proved. There demonstrates the dependency of Raman scattering signal in the system of optical
M. Bezuglyi +3 more
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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.
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