Digital holography and holographic interferometry

• Autorzy: Kreis T. M.
• Konferencja: Euromech 406 colloquium on Image Processing Methods in Applied Mechanics (6-8.05.1999 ; Warsaw, Poland)
• Języki publikacji: EN

Abstrakty

EN

Holography is a method for three-dimensional imaging frequently used in metrology and nondestructive testing. Up to now both the generation of the holograms as well as the reconstruction of the wavefields was performed optically. In digital holography optically generated Fresnel- or Fraunhofer holograms are recorded by a CCD array. The reconstruction of the wavefields is done digitally by image processing methods based on the mathematical concept of the diffraction integral. Two approaches to its numerical solution are the finite discrete Fresnel transform and a procedure employing the convolution theorem. Both approaches result in a complex field from which intensity and phase can be determined. In digital holographic interferometry the sign-correct interference phase distribution is computed with high accurancy by subtraction of two numerically reconstructed phase distributions.

Słowa kluczowe

EN

digital holography; holographic interferometry; Fresnel transform; diffraction integral; three dimensional imaging

• Wydawca: Institute of Information Technology of the Warsaw University of Life Sciences – SGGW
• Czasopismo: Machine Graphics and Vision
• Rocznik: 1999
• Tom: Vol. 8, No. 4
• Strony: 611--624
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Kreis T. M.

• BIAS - Bremer Institut fur angewandte Strahltechnik, Klagenfurter Str. 2, D 28359 Bremen. Germany