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- W797562904 abstract "The precise measurement of the shape of fast rotating workpieces is important at several applications such as lathe monitoring. For such tasks the laser Doppler distance sensor technique was invented by the TU Dresden some years ago. This technique has been realized by two mutually tilted interference fringe systems, where the distance is coded in the phase difference between the generated interference signals of two photo detectors. However, due to the speckle effect at rough surfaces, random envelopes and phase jumps occur disturbing the phase difference estimation. Recently a scientific breakthrough for the measurement uncertainty budget has been achieved. Via illumination and receiving optics matching the uncertainty of the measurement uncertainty was reduced by about one magnitude. For displacement measurements of a recurring rough surface an uncertainty of 110 nm were attained. It enables precise shape measurements, since the lateral velocity and the rotational speed of rotating objects are determined additionally. This novel sensor technique can be advantageously used for the quality control of workpieces inside of a lathe towards the reduction of process tolerances, installation times and costs." @default.
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- W797562904 date "2013-01-01" @default.
- W797562904 modified "2023-09-30" @default.
- W797562904 title "2.3 - Precise shape measurements of rotating workpieces by a single optical sensor" @default.
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- W797562904 doi "https://doi.org/10.5162/opto2013/o2.3" @default.
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