Speckle interferometry experiments with a digital photocamera
Anno: 2004
Autori: Vannoni M., Molesini G.
Affiliazione autori: CNR – Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: We discuss a simple experiment for detecting small deformations by speckle interferometry. The optical setup uses a laser diode for the source together with a lens to expand the laser beam and a beam splitter dividing the beam and illuminating two scattering surfaces. A low-cost, commercial charge coupled device (CCD) photocamera provides images of the two superimposed speckle fields through the beam splitter. We first take a picture with the system at rest, and then take a second one after a deformation is made in a surface. By simple subtraction of the digital pictures, we obtain a fringe pattern that gives us information about the deformation. (C) 2004 American Association of Physics Teachers.
Giornale/Rivista: AMERICAN JOURNAL OF PHYSICS
Volume: 72 (7) Da Pagina: 906 A: 909
Parole chiavi: charge coupled device (CCD); speckles; interferometry; digital photocamera; DOI: 10.1119/1.1643375Citazioni: 12dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui