Results 211 to 220 of about 120,841 (261)
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Interreflections with rough surfaces
Proceedings of 12th International Conference on Pattern Recognition, 2002Interreflections are an important visual effect that needs to be accounted for in any endeavour that exploits photometry and radiometry, such as shape from shading and color constancy. Previous work on interreflections has considered pure nonrough Lambertian reflection only, and this is a crude approximation to the physics of light reflection.
Warren S. Macchi, Niels da Vitoria Lobo
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Ellipsometry of rough surfaces
Applied Optics, 1980Ellipsometry measurements on several different kinds of rough surfaces were compared with stylus measurements of the surface texture. For steeply sloped periodic surfaces, the ellipsometric angles Delta and psi varied rapidly as the angle of incidence was varied near a diffraction minimum. This effect is interpreted in terms of the Kirchhoff theory and
T V, Vorburger, K C, Ludema
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The dependence of polarimetric coherence on surface roughness for very rough surfaces
IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004The focus of this study is on the polarimetric signature of very rough surfaces. It has been shown that the co-polarized backscatter components, HH and VV, for very rough surfaces do not conform to the first order Bragg model. Laboratory backscatter measurements across a wide range of frequencies are used to investigate the transition from the Bragg ...
Saurabh Malhotra +2 more
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Waves in Random Media, 1991
Abstract A summary of the theoretical and computational approaches to rough surface scattering is presented. For the Dirichlet problem new computational results are presented for the behaviour of the normal derivative of the field on the surface as well as the behaviour of coherent and incoherent intensities as a function of angle and surface height ...
John A. DeSanto, Richard J. Wombell
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Abstract A summary of the theoretical and computational approaches to rough surface scattering is presented. For the Dirichlet problem new computational results are presented for the behaviour of the normal derivative of the field on the surface as well as the behaviour of coherent and incoherent intensities as a function of angle and surface height ...
John A. DeSanto, Richard J. Wombell
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Ultrasonic measurements of surface roughness
Applied Optics, 1992We describe the use of pulsed ultrasound at MHz carrier frequencies to reflect and scatter from rough surfaces in an analogous way that light is used, comparing the results to stylus data. A principal application is to the manufacturing environment for on-line real-time sensor feedback and process control.
G V, Blessing +3 more
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2019
Abstract When two surfaces are brought into contact, they first touch where the summits of the surface asperities make contact. Consequently, surface roughness or topography strongly influences those physical phenomena associated with contact: friction, adhesion, and wear.
C. Mathew Mate, Robert W. Carpick
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Abstract When two surfaces are brought into contact, they first touch where the summits of the surface asperities make contact. Consequently, surface roughness or topography strongly influences those physical phenomena associated with contact: friction, adhesion, and wear.
C. Mathew Mate, Robert W. Carpick
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Surface polarons near rough surfaces
Physical Review B, 1989L'hamiltonien effectif du polaron est obtenu a l'aide de la transformation unitaire de Lee-Low-Pines et en considerant le deplacement des electrons dans le champ instantane des phonons optiques. On effectue des calculs numeriques du potentiel d'image du polaron et de sa masse effective, a partir d'une surface de ZnO (a gradins dans les cas ou le ...
, Sun, , Gu
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Mechanism for rough-to-rough transitions in surface growth
Physical Review Letters, 1990Interpretation par la theorie de Kardar-Parisi-Zhang de la rugosite cinetique, qui differe du mecanisme propose par Amar et ...
, Krug, , Spohn
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Surface roughness of restorations
British Dental Journal, 1976J R, Heath, H J, Wilson
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