An External Interface for Processing 3-D Holographic and by Werner Jüptner, Thomas Kreis

By Werner Jüptner, Thomas Kreis

Internationally well-known specialists within the box of holographic interferometric trying out, X-ray trying out, and structural research by means of finite point thoughts have come jointly in ESPRIT undertaking 898 to advance a method that integrates those ideas. the program acts as an exterior interface among the complementary nondestructive trying out equipment and computing device established structural research. within the e-book the checking out and research concepts are provided and in comparison with certain emphasis on difficulties concerning their mix and integration. The structure and the elements of the interface process are defined. Experiments proving the feasibility and applicability of the suggestions are awarded. The chapters of the booklet facing the various strategies are written via the person companions of the venture. a standard try out item is investigated through all options. The ebook is helping the client to pick the checking out and research strategy most fitted for his challenge. It additionally offers the historical past for increase built-in trying out gear for research and control.

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I Heterodyne Fringe Tracking Methods for Interference Phase Determination X cV- Z C 0 or! lH or! l or! J::: +J OJ or! S Ul or! l OJ C S OJ or! S H OJ OJ H 0, or! l or! 0) I\J 27 This evaluation gave a unique result: To fulfil external the requirements of the interface system, the phase step method and the Fourier transform method are best suited. These methods have consequently theoretically, the been investigated software for their realisation has been implemented in the demonstration system, practical experiments have been carried out, hardware concepts for and design of an interface system performing these me- thods have been developed.

Most common are phase step methods with three reconstructions and a known fixed phase shift of 60 0 , 90 0 , or 120 0 , and the method using four recon- structions and an unknown but constant phase shift. BS S 00 ~H 0 C 0 Object H S R M BS PM C Hologram Object wave Reference wave Mirror Beam splitter Piezo - mounted mirror Camera Fig. 20) 14 (n,m) = A (n,m) + B (n,m) cos (l\'P(n,m) + 30:) Here a is the additional phase shift, nand m represent the pixel coordi- nates in the image processing system.

LH or! l or! J::: +J OJ or! S Ul or! l OJ C S OJ or! S H OJ OJ H 0, or! l or! 0) I\J 27 This evaluation gave a unique result: To fulfil external the requirements of the interface system, the phase step method and the Fourier transform method are best suited. These methods have consequently theoretically, the been investigated software for their realisation has been implemented in the demonstration system, practical experiments have been carried out, hardware concepts for and design of an interface system performing these me- thods have been developed.

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