The aim of this study is to assess angle-dependent systematic errors and measurement uncertainties for a conoscopic
holography laser sensor mounted on a Coordinate Measuring Machine (CMM). The main contribution of our work is the
definition of a methodology for the derivation of point-sensitive systematic and random errors, which must be
determined in order to evaluate the accuracy of the measuring system. An ad hoc three dimensional artefact has been
built for the task. The experimental test has been designed so as to isolate the effects of angular variations from those of
other influence quantities that might affect the measurement result. We have found the best measurand to assess angle-dependent
errors, and found some preliminary results on the expression of the systematic error and measurement
uncertainty as a function of the zenith angle for the chosen measurement system and sample material.
We present the recent results obtained by a system which measures both 3D shape and multispectral texture of artistic
and architectural cultural assets. The system consists on a rangefinder device which acquires the range and a visible
scanning spectrograph for colour texture analysis. This technique is applied to the acquisition of the cycle of Stories of
Maria, a frescoed lateral chapel painted by Girolamo Tessari in 1523-1526 located in the church of S. Francesco in
Padua (Italy).
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