Results 211 to 220 of about 159,411 (262)
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Moiré topography by slit beam scanning
Applied Optics, 1992A new method of moiré topography is suggested in which a slit beam is used in a scanning mode to generate moiré fringes. One remarkable feature of this method is that, as opposed to existing shadow and projection types, height differences between two consecutive fringes become constant so that absolute fringe orders need not be identified.
Kim, Seung-Woo, Park, Hyun-Goo
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Gated Irradiation With Scanned Particle Beams
International Journal of Radiation Oncology*Biology*Physics, 2009To demonstrate mitigation of the interplay effects of scanned particle beams and residual target motion within a gating window by increased overlap of pencil beams.Lateral overlap was increased by increasing the pencil beam widths or by decreasing the distance between the pencil beams (scan grid).
Christoph, Bert +3 more
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Radiation Effects, 1979
Abstract A discussion of electrostatic scanning systems is given with respect to mechanical scanning, uniformity and current capabilities as they relate to ion implanters. Equations for the degradation of uniformity due to wafer tilt. misalignment and changing beam size are presented.
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Abstract A discussion of electrostatic scanning systems is given with respect to mechanical scanning, uniformity and current capabilities as they relate to ion implanters. Equations for the degradation of uniformity due to wafer tilt. misalignment and changing beam size are presented.
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Beam Scanning Metasurface Antennas
2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2018Metasurface (MTS)antennas have been shown to be a versatile class of planar antenna. In particular, they allow for beam shaping and pattern control through the modulation of the boundary conditions, while keeping unchanged the overall antenna structure. This feature makes them suitable for dynamic reconfiguration.
Pavone S. C. +4 more
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1972
Publisher Summary This chapter provides an overview of electron beam scanning. A considerable advance in electron-tube design was made in the development of the all-electrostatic vidicon, and in the subsequent variations of its electron beam system for smaller vidicon and the printicon.
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Publisher Summary This chapter provides an overview of electron beam scanning. A considerable advance in electron-tube design was made in the development of the all-electrostatic vidicon, and in the subsequent variations of its electron beam system for smaller vidicon and the printicon.
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Interferometric scanning of laser beams
Optics Communications, 1976Abstract A new beam deflection technique is based on modulating the optical transmission characteristics of a modified Fabry-Perot interferometer. Electro-optically changing the interferometer length leads to fast high resolution scanning of the transmission fringe.
Lee W. Casperson, Oscar M. Stafsudd
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Electronic Beam Scanning of Injection Lasers
Journal of Applied Physics, 1966Experiments are described that resulted in the spatial scanning of the coherent emission of a GaAs junction laser at 77°K. By electrically separating the p side of the junction into several sections the current distribution is deliberately made nonuniform.
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X-Ray Imaging with a Scanning Beam
Radiology, 1975An x-ray imaging system that makes use of a rapidly scanning pencil beam of x rays to acquire images of any part of the body has been developed. The system is capable of generating and displaying images in 15 seconds, using extremely low radiation exposures.
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Beam scanning for dose uniformity
Radiation Physics and Chemistry, 1995A low max/min ratio of absorbed dose is a prime objective in any industrial irradiation process. The IMPELA® electron beam irradiator has been further developed to deliver a beam distribution that can be tailored to match the required dose uniformity for specific products and applications.
J. McKeown +4 more
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Volume Scanning with Conical Beams
Proceedings of the IRE, 1950The equations of motion for a radar scan that provides a nearly constant number of pulses to all point targets are derived. In addition, the periods for this scan and for the more conventional one having constant angular velocities are presented. For these types of scanners it is found that the optimum cross-over point between adjacent beams is at the ...
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