منابع مشابه
NURBS-based Inverse Reflector Design
Commonly used direct rendering techniques simulate light transport for a complete scene, specified in terms of light sources, geometry, materials, participating media, etc. On the other hand, inverse rendering problems take as input a desired light distribution and try to find the unknown parts of the scene needed to get such light field. The latter kind, where inverse reflector design is inclu...
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This paper proposes a technique for the design of luminaire reflector shapes from prescribed optical properties (far-field radiance distribution), geometrical constraints and user’s knowledge. This is an important problem in the field of Lighting Engineering, more specifically for Luminaire Design. The reflector’s shape to be found is just a part of a set of pieces called in Lighting Engineerin...
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Many useful methods for calibrating weather radars in the field and laboratory are summarized by Joe and Smith (2001) from presentations at the 2001 AMS Radar Calibration Workshop in Albuquerque, NM . Additional methods are described by Atlas (2002). Common external (full-system) calibration methods range from using metal spheres suspended from balloons to the use of solar radio emissions. Alth...
متن کاملRegion-Enhanced Passive Radar Imaging
We adapt and apply a recently-developed region-enhanced synthetic aperture radar (SAR) image reconstruction technique to the problem of passive radar imaging. One goal in passive radar imaging is to form images of aircraft using signals transmitted by commercial radio and television stations that are reflected from the objects of interest. This involves reconstructing an image from sparse sampl...
متن کاملOn the design of a reflector antenna
We consider the problem of recovering a reflecting surface such that for a given point source of light the directions of the reflected rays cover a prescribed region of a far field sphere and the density of the distribution of the reflected rays is a function prescribed in advance, where the aperture of the incident ray cone is also prescribed in advance. Mathematically this problem requires on...
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ژورنال
عنوان ژورنال: Journal of Navigation and Port Research
سال: 2003
ISSN: 1598-5725
DOI: 10.5394/kinpr.2003.27.3.267