The geometric-optical phase measurement techniques (GOPs) Fringe Projection
Phase Measuring Deflectometry
are designed for the measurement of diffusely reflective
and specularly reflective surfaces respectively. Measurement of surfaces with unknown reflective characteristics or with spatially varying reflective characteristics using a single one of these techniques is not feasible.
In the scope of a master's thesis, a novel combined GOP for the measurement of technical or other surfaces with
mixed reflective characteristics was developed, which involves the fusion of measurement data
from Fringe Projection and Phase Measuring Deflectometry measurements. After explaining
the basic principle of geometric-optical phase measuring and the importance of the
measurement parameters, the novel algorithm is described and measurements with a
combined GOP setup are presented.
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