212 articles – 1958 Notices  [english version]
HAL : in2p3-00025261, version 1

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Measurement Science & Technology 14 (2003) 2121-2126
High-accuracy optical measurement of flatness for large objects
S. Pavageau1, R. Dallier1, N. Servagent1, T. Bosch
ALICE Collaboration(s)

A high-accuracy non-contact optomechanical system has been designed for measuring the surface profile of relatively flat and large objects. The experimental set-up consists of a motorized gantry, a rangefinder, a CCD chip and a laser diode. This set-up permits discrete measurements to be performed on objects with a maximum plane surface area of 2.6 × 0.5 m2 along both the X and Y axes. Experiments were carried out on carbon sandwich panels. An uncertainty of ±8 µm has been obtained on flat and smooth surfaces; a ±30 µm uncertainty has been determined for a rough carbon sandwich panel.
1 :  SUBATECH - Laboratoire SUBATECH Nantes
Physique/Physique/Instrumentations et Détecteurs
shape measurement – laser sensor – non-destructive testing
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