Implementation de la técnica de correlación de speckles láser para la medida de la rugosidad superficial

  1. F. Dalmases 1
  2. R. Cibrian 1
  3. M. Buendia 1
  4. C. Romero 1
  5. F. Salvador 1
  6. J. Montilla 2
  1. 1 Universitat de València
    info

    Universitat de València

    Valencia, España

    ROR https://ror.org/043nxc105

  2. 2 Instituto de Óptica Daza de Valdés
    info

    Instituto de Óptica Daza de Valdés

    Madrid, España

Journal:
Óptica pura y aplicada

ISSN: 2171-8814

Year of publication: 1989

Volume: 22

Issue: 2

Pages: 75-81

Type: Article

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Abstract

The correlation between two speckle patterns produced by a common surface illuminated successively from two slightiy different angles depends on its rugosity. The recording of both speckles on the same negative and their post—development illumination by a converging laser beam provides. Young fringes in the Fourier plane. Their visibility is an adequate indication of the correlation degree between the speckles. The experimental and analytic procedure developed makes it possible to determine the rugosity with a precision about 10% The technique is valid for large rugosities, in excess of 4—5 un.

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