A special fibre-optic interferometer is proposed for 3D profilometry. Sinusoidal fringes are produced by the interference of two spherical wavefronts emitted from the output fibres of a directional coupler. The fringe pattern is projected on an object surface and the deformed grating image is captured by a CCD camera. Subsequently, the captured image is analysed, and the relationship between the fringe phase and the height distribution of the illuminated surface is derived. The proposed method is simple and accurate. It is suitable for automatic measurements. Detailed theoretical and experimental results are presented. Tests show that the system can detect indents and outdents with a maximum depth of less than 10 um.

SCHIRRIPA SPAGNOLO, G., Guattari, G., Sapia, C., Ambrosini, D., Paoletti, D., Accardo, G. (2000). Three-dimensional optical profilometry for artwork inspection. JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS, 2, 353-361 [10.1088/1464-4258/2/5/302].

Three-dimensional optical profilometry for artwork inspection

SCHIRRIPA SPAGNOLO, Giuseppe;SAPIA, Carmine;
2000-01-01

Abstract

A special fibre-optic interferometer is proposed for 3D profilometry. Sinusoidal fringes are produced by the interference of two spherical wavefronts emitted from the output fibres of a directional coupler. The fringe pattern is projected on an object surface and the deformed grating image is captured by a CCD camera. Subsequently, the captured image is analysed, and the relationship between the fringe phase and the height distribution of the illuminated surface is derived. The proposed method is simple and accurate. It is suitable for automatic measurements. Detailed theoretical and experimental results are presented. Tests show that the system can detect indents and outdents with a maximum depth of less than 10 um.
2000
SCHIRRIPA SPAGNOLO, G., Guattari, G., Sapia, C., Ambrosini, D., Paoletti, D., Accardo, G. (2000). Three-dimensional optical profilometry for artwork inspection. JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS, 2, 353-361 [10.1088/1464-4258/2/5/302].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/134483
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 23
social impact