Contribution à L'étude Théorique des Images et des Franges Produites Par Deux Hologrammes en Sandwich
Abstract
A technique is developed for studying the movement of an image when the hologram yielding the image changes position. The method employs a sandwich hologram where one hologram reconstructs the image of the undeformed object, and the other the image of the deformed object. The movement of an image point in relation to its hologram is measured, and the difference of the movement of the two reconstructed images is calculated. Interface fringes, and their use in deformation measurements are studied. The optical path difference which establishes fringe order is found to be a function of object displacement (caused by mechanical deformation) and hologram motions. The derivatives of opticalpath differences are found to also depend on the displacement derivative, i.e., considering strain tensor and rotation tensor at the object point. The derivatives describe the condition of complete localization, the interfringe, and fringe directions. They also yield a theorem concerning this direction.
 Publication:

Optica Acta
 Pub Date:
 December 1977
 DOI:
 10.1080/713819478
 Bibcode:
 1977AcOpt..24.1193D
 Keywords:

 Diffraction Patterns;
 Hologrammetry;
 Holographic Interferometry;
 Image Motion Compensation;
 Refractivity;
 Sandwich Structures;
 Differential Calculus;
 Displacement Measurement;
 Imaging Techniques;
 Optical Paths;
 Point Sources;
 Tensor Analysis;
 Wave Front Deformation;
 Wave Fronts;
 Instrumentation and Photography