Three-dimensional optical profilometry for artwork inspection

Spagnolo, Giuseppe Schirripa; Guattari, G.; Sapia, Carmine; Ambrosini, Dario; Paoletti, Domenica; Accardo, Giorgio

doi:10.1088/1464-4258/2/5/302

Cited by 19 publications

(9 citation statements)

References 24 publications

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“…This is in good agreement with the relationship that exists between the number of fringes and rms error [15]. This error figure seems to be quite high for the sensitivity of the system, when compared to similar results in previously published work [8][9][10], and is due to the number of interference fringes being small (i.e., 7,8) and fringe spacing being more than is desired. However, these are the preliminary results and are aimed to prove that the proposed four-core fibre scheme in optical profilometry is promising.…”

Section: Resultssupporting

confidence: 91%

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Three-dimensional optical profilometry using a four-core optical fibre

Bulut

Incı

2005

Optics & Laser Technology

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Section: Resultssupporting

confidence: 91%

“…In optical profilometry techniques, which are based on fibre optics, fringe patterns are produced by interference of two separate waveguide fibre optic point sources successfully [8][9][10]. Construction of such a two-fibre optic source has requirement of using a fibre coupler.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional optical profilometry using a four-core optical fibre

Bulut

Incı

2005

Optics & Laser Technology

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“…This is good agreement with the relationship that exists between the number of fringes and rms error [25]. This error figure seems to be quite high for the sensitivity of the system, when compared to similar results in previously published work [26], [27]. However, these are the preliminary results and are aimed to prove that the proposed three-fiber grid pattern generating scheme in optical profilometry is promising.…”

Section: Resultssupporting

confidence: 90%

Fiber-Optic Grid Interferogram Shape Sensing System

Yuan

Liu

et al. 2008

IEEE Sensors J.

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Based on the three-fiber-optic grid interferogram technique, a shape sensing approach has been proposed and demonstrated in this paper. The square and hexagon grid interferometric fringe pattern formed by the fiber-optic interferometric grid generator has been designed and performed. The designing and realizing methods of the fiber-optic interferometric grid pattern by using three PM fibers are discussed. Theoretically, the three-fiber coherence optical field intensity distribution has been deduced. By using the 2-D Fourier transform methodology, the object surface can be reconstructed from the modulated fiber-optic grid interferogram pattern. The multiphase data fusion method has been used in our experiments, which greatly improved the accuracy of the 3-D shape measuring results.Index Terms-Fiber-optic grid interferogram, Fourier transform, optical fiber, shape sensing.

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“…A first version (hereinafter called FP1) uses the interference of light from two optical fibers for the generation of fringes [29,30]. This system requires a laser, a pair of optical fibers and the usual acquisition camera.…”

Section: Fringe Projectionmentioning

confidence: 99%

The Potential of Optical Profilometry in the Study of Cultural Stone Weathering

et al. 2019

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The problem of deterioration of marble or stone monuments on display in the open air was raised in scientific terms around the mid-nineteenth century, correctly sensing the close dependence between the increased speed of surfaces alteration and air pollution. However, only more recently, around the years 1980–1990, emerged a need for quantitative data to assess the degree of degradation and the relative danger in the future projections. Non-destructive techniques can be an important aid in assessing the state of degradation and, above all, its speed, directly on the most important monuments exposed to the urban environment. In this work we discuss some non-destructive techniques able to evaluate the alteration of the surface shape of artefacts exposed to the environment through a non-contact survey of their surface shape. Advantages and disadvantages will be highlighted, as well as the problems still open.

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Three-dimensional optical profilometry for artwork inspection

Cited by 19 publications

References 24 publications

Three-dimensional optical profilometry using a four-core optical fibre

Three-dimensional optical profilometry using a four-core optical fibre

Fiber-Optic Grid Interferogram Shape Sensing System

The Potential of Optical Profilometry in the Study of Cultural Stone Weathering

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