Experimental characterization of a random metallic rough surface by spectrophotometric measurements in the visible range

Elias, Mady; Menu, Michel

doi:10.1016/s0030-4018(00)00714-8

Cited by 31 publications

(16 citation statements)

References 7 publications

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“…It is characterized by the ratio h/l, which is the relevant parameter, as shown in previous studies. 3 Moreover, a very rough surface is deemed synonymous with a large value of h/l (large slopes). In order to fit experimental conditions, computations are achieved in a back-scattering configuration; that is, the collected beam is of opposite direction to the incident collimated beam.…”

Section: Introductionmentioning

confidence: 99%

“…If the surface becomes rough, the incident light is also randomly reflected in all directions, modifying the reflectance spectrum. In the visible range (380 nm Ͻ Ͻ 780 nm), real surfaces, supposed isotropic and random Gaussian, can be considered as very rough ones ie, h ӷ (by instance h ϭ 1.18 m or 1.3 m, respectively, for streaked copper 3 or for streaked stainless steel 6 ). Moreover, the limit of optical physics is applicable [ie, the radius of curvature of the irregularities Ϸl 2 /h Ͼ Ͼ (l ϭ 9.46 m or 15.2 m for the previous cases, so l 2 /h ϭ 76 m or 177 m)].…”

Section: Introductionmentioning

confidence: 99%

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Color change due to surface state modification

Simonot

Elias

2002

Color Research & Application

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Color change due to surface state modification

Simonot

Elias

2002

Color Research & Application

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“…Moreover, the "surface state" (roughness) is known to have a strong influence on the value of the diffuse reflectance factor (17), and it is shown from the preceding investigation that the roughness may vary in large proportion from one specimen to another. Therefore, the spectra of Figure 9 should only be compared to the values of the wavelengths corresponding to "accidents" occurring in the curve shape, such as slope change or absorption bands.…”

Section: Results and Interpretationsmentioning

confidence: 93%

“…Spectro-photometry was performed using a goniospectro-photo-colorimeter working in back-scattering Figure 1 The investigated ceramic objects mode (17). This equipment illuminates the specimen with white light in the visible range (illuminant D65) under a given adjustable incidence angle over an area of 6 mm diameter, and collects the back-scattered light in the same direction.…”

Section: Characterisation Methods and Specimen Preparationmentioning

confidence: 99%

An investigation of gold/ceramic and gold/glass interfaces

2002

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Abstract:This paper describes how various characterisation methods can be used to investigate the physicochemical and spectral properties of gold films in contact with glass or ceramic. The interface between the metal and substrate has been given special attention. The examples chosen to illustrate this include: liquid gold films (decorated and fired) or inlayed gold layers on ceramic wares and "sandwich" gold foils between two glass sheets for mosaic application. Characterisation methods include: microanalytical scanning electron microscopy, X-ray diffraction, ion beam analyses (PIXE: particle induced X-ray emission; RBS: Rutherford back-scattering spectrometry), photo-spectrometry and colorimetry. The adhesion mechanism and colour behaviour of the coated objects is discussed.Gold films coated on, or in contact with, oxides (glass or ceramic) have a great number of artistic and technological applications. Gold has been used to decorate ceramic and glass for centuries, e.g. mosaic art and more recently gold films are used in high technology areas to modify surface properties. In most applications, the colour is of great importance, and also the strength and durability of the films. The nature of the adhesion at the interface between coating and substrate is vital in terms of durability. Information about the adhesion mechanism may be obtained by a physicochemical investigation at high resolution.

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“…Thus, we can deduce the geometrical characteristic of a surface defined by the ratio of h (mean quadratic roughness) on l (correlation length) [Appendix]. 1 The facts that these measurements are nondestructive, without contact, and can be realized in situ make this method very adaptable to the study, the restoration, and the knowledge of the artistic techniques of the works of art that make up our cultural heritage. 2 The same technique was used by Simonot and Elias 3 to study the relation between the colour and surface topography of objects.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of back‐scattering spectrum of textile structures

Moussa

Dupont

Steen

et al. 2006

Color Research & Application

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International audienceThe back-scattered light by textile surfaces mainly depends on their surface state, which is often periodic and directional. The analysis of the reflectance spectra in back-scattering conditions of two hypes of structures (yarn, plain and twill weaves) shows the influence of the orientation of these surfaces as well as the back-scattered angle. In fact, the declination of the yarn orientation in relation to the incidence plane involves an increase of the reflectance factor to reach a maximum value when the Yarns are perpendicular to this plane. For woven fabrics, the backscattering of surface according to a given orientation primarily depends on its geometrical characteristic in this direction and consequently the used yarn densities. The computation of the ratio of mean quadratic surface roughness h to correlation length I for various used orientations shows the close link between this parameter and the evolution of back-scattering. The effect of the variation of backscattered angle on the back-scattered light varies with the value of h/l. The comparison between these experimental results and a theoretical study based on Gaussian and isotropic surfaces shows a satisfactory correlation between these two elements with the presence of some cases of discrepancy due to the different natures of the two types of surfaces. (c) 2006 Wiley Periodicals, Inc

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Experimental characterization of a random metallic rough surface by spectrophotometric measurements in the visible range

Cited by 31 publications

References 7 publications

Color change due to surface state modification

Color change due to surface state modification

An investigation of gold/ceramic and gold/glass interfaces

Experimental study of back‐scattering spectrum of textile structures

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