6.1.4 - Accuracy of 3D position measurement of spherical objects with a holographic single camera setup
- 18. GMA/ITG-Fachtagung Sensoren und Messsysteme 2016
2016-05-10 - 2016-05-11
- 6.1 Interferometrische Messverfahren
- J. Guhathakurta, W. Li, S. Simon - Institute for Parallel and Distributed Systems (IPVS), Stuttgart (Germany)
- 431 - 437
In this paper, the accuracy with which a 3D position of a transparent spherical object can be measured, is investigated depending on the pixel size in the reconstructed image from a lens-less Mach-Zehnder holography setup. The ability to track 3D position of transparent spherical objects like bubbles or spray particles play an important role in mechanical process engineering. Since the 3D position of such objects are highly variable in time, standard imaging position measurement cannot be done as the objects frequently move in and out of focus and hence accurate position cannot be extracted from images. However, with lens-less holographic technique like the Mach-Zehnder holography, the 3D positon of an object can be measured without the need of focussing on the moving object. An experimental setup of the digital Mach-Zehnder off axis holography is presented in this paper and a quantitative analysis of the accuracy with which the 3D position of transparent spherical objects can be measured in the reconstructed image is investigated.