Holografisch-interferometrische Messtechnik. Ergebnisse des Teilvorhabens: Doppelpuls- und Konturlinien-Speckleholografie mit rechnergestuetzter Interferogrammauswertung Schlussbericht

Abstract

Various set-ups for double-pulse TV-Holography were investigated. A double-pulse laser (Ruby laser) has been used. Two holograms were recorded with the two laser-pulses (pulse separation in microsecond range) on a CCD-sensor. The described methods are well suited for the study of vibrations. In particular with pulse separation in the range between 5 #mu#sec and 1000 #mu#sec it is possible to investigate transient events. The spatial carrier phase shift method can be applied without problems to the double pulse system, allowing quantitative evaluation. The method is easier for the applications as the classical double pulse-holographic interferometry and allows a fast evaluation of the interferogram without film development and hologram reconstruction. It is thus well suited to be used in an industrial environment. Various Speckel-Contour arrangements were investigated. The shape information was obtained by beam tilting or Wavelength change. It was shown that the Contour sensitivity in the presented systems can be continuously changed. Shape measurements of large objects and fast measurements are possible. (orig.)SIGLEAvailable from TIB Hannover: F96B790+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman