Hagen Broistedt, Rainer Tutsch
To measure the topography of a surface by conventional phase shifting interferometers, exactly known phase shifts between reference and test surface are required. To keep the phase shifts stable during measurement, the interferometers are mounted on vibration isolation tables. To overcome the necessity of expensive vibration isolation equipment, in [1] a low cost interferometer for plane surfaces had been presented that copes with vibration, and makes use of the vibrations to create phase shifts during the measurement. This article describes the extension of this approach to the measurement...
TC14 LMPMI Symposium 2011
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Marc Gronle,Wolfram Lyda,Florian Mauch,Wolfgang Osten, David Fleischle
In this paper, a new single-shot line sensor based on Fourier-domain spectral interferometry is presented. Each point of the sampled line is encoded by a different wavelength obtained by a chromatic dispersion at a grating. The requested height profile of the line is determined by combining a phase detection algorithm with an appropriate model-based approach. The robustness of this algorithm with respect to errors in the initial condition is analyzed before the final presentation of a measurement result.
TC14 LMPMI Symposium 2011
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Z. Buchta, B. Mikel, M. Cížek, J. Lazar, O. Cíp
In this paper, a novel principle of contactless gauge blocks calibration is presented. The principle of contactless gauge block calibration combines low-coherence interferometry and laser interferometry. An experimental setup combines Dowell interferometer and Michelson interferometer to ensure a gauge block length determination with a direct traceability to the primary length standard. By monitoring both gauge block sides with digital camera gauge block 3D surface diagnostics is possible too.
TC14 LMPMI Symposium 2011
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Ichirou Yamaguchi
Measurement of surface shape of diffusely reflecting objects by phase shifting digital holography is described. After basic principles and an experimental result are briefly explained, a digital simulation algorithm is presented that delivers 2-dimensional distributions of the reconstructed images and contours for general object and hologram recording conditions.
TC14 LMPMI Symposium 2011
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J. Soons, J. Dirckx
The beak of finches is a very important example in evolution theory, and yet not fully understood. Furthermore, it is also fascinating from a mechanical point of view. In this paper we will use digital speckle pattern interferometry to obtain the displacement of the upper beak while loaded. Next, a finite element model is used in an inverse analysis, resulting in the modulus of the bony core and the keratin layer of this complex sample.
TC14 LMPMI Symposium 2011
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M. Michihata, Y. Takaya, T. Hayashi
We have developed a non-contact surface sensing probe for a nano-coordiante measuring system. This micro-probe is controlled by optical radiation pressure. The probe sphere is oscillated and then damped near the surface by a viscouse drag force. The damping nature of the probe was studied to improve the precision of the surface detection. An attempt was made to characterize the probe damping nature by the viscous drag coefficient.
TC14 LMPMI Symposium 2011
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Sabine Linz, Alexander Schöch, Carlo Bach, Andreas Ettemeyer, Buchs, Switzerland, Benjamin Hopp, Matthias Andräs
Increasing manufacturing accuracy requirements enforce the development of innovative and highly sensitive measuring tools. The recent introduction of optical fiber probes combined classical tactile measurement methods with optical read out and reaches measurement uncertainties as small as 0.1 micrometers. In this paper we describe an innovative way to measure the z -position of the fiber tip itself with high accuracy by using interferometry.
TC14 LMPMI Symposium 2011
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R. Christoph, B. Hopp, I. Schmidt
A new sensor will be presented, being capable to realize optical and tactile 3D measurements on workpieces by combining several measuring principles in one sensor head. An image processing sensor enables lateral measurements of edges and margins of objects. To determine the objects surface shape, a laser distance sensor and alternatively a focus variation sensor, both operating thru the same telecentric optic, are used for vertical measurements. A third measuring method is realized by detachably mounting a flexible fiber including a tiny probing sphere in front of the optic to enable tactile...
TC14 LMPMI Symposium 2011
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Ismail Bogrekci, Pinar Demircioglu, M. Numan Durakbasa
Surface Engineering has been a scientific discipline studying various procedures for the improvement of surface properties since 1980.The surface roughness of manufactured parts is commonly measured by the tactile methods. The stylus profilometer is one of the standard techniques assessing surfaces. This is a worthymethod for looking at small areas but the major disadvantage of using a stylus profilometer is that it requires direct physical contact limiting the measuring speed. In contrast to contact measurement systems, optical technique, which is a non-destructive and non-contact method,...
TC14 LMPMI Symposium 2011
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Albert Weckenmann, Heiko Schmidt, Robert Schmitt, Niels König, Hanqing Zheng
Nowadays the honing process of cylinder liners for combustion engines is monitored by 2D tactile measurements of the honing structure. The problem of tactile measuring is the required offline measurement of the cylinderblocks, which results in increased handling efforts and costs. In this paper a method is introduced which overcomes this disadvantage by applying an inline optical measuring system for 100% in line measurement of the honed cylinder liner surfaces. Focus is the comparison of two optical sensors, working after the principle of chromatic aberration and a fiber based white-light...
TC14 LMPMI Symposium 2011
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