Abstract
Because the bottom of the cavity has the shadow and occlusion, the angle between
the projection system and imaging system is limited. So the traditional fringe
projection technique based on the principle of optical triangulation is inapplicable.
This Letter presents a 3D shape measurement method of using the light tube for the
cavity. The method can measure an object from two opposite views at the same time, which
means it will obtain two different groups of 3D data for the same object in a single
measurement. The experimental results show the feasibility and validity of the 3D shape
measurement method.
© 2016 Chinese Laser Press
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