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High-resolution few-pattern method for 3D optical measurement
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DOI：10.1364/OL.44.003602.png)
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Abstract
En 中文
Accurately and quickly obtaining the three-dimensional (3D) shape information of objects has become increasingly important in various scientific fields. However, simultaneously achieving the high-resolution and high-speed 3D shape measurement of unknown objects remains challenging in practice. In this Letter, we propose a novel variant shifting-phase method for 3D optical measurement. Based on a digital fringe projection system, the method performs a point-wise high-resolution measurement of objects by projecting only four intensity-coded patterns. We can retrieve the wrapped phases and their corresponding fringe orders simultaneously from these four patterns, and do not require any pre-acquired information of the object. The experimental results successfully demonstrate the effectiveness of the easy-to-operate method. (C) 2019 Optical Society of America
Keywords:
FRINGE PROJECTION PROFILOMETRY
ABSOLUTE PHASE RETRIEVAL
CODING METHOD
SHAPE MEASUREMENT
RANGE
INTERFEROMETRY