Phase measuring deflectometry has been applied for free-form specular surface metrology,
but its measured slope results are sensitive to the depth of sample positioning, which is also …

The calibration of a deflectometry system is an essential requirement for achieving accurate
specular surface reconstruction. In this paper, we propose a 3D-based optimization method …

A wide variety of systems are employed to measure the surface profile of aspheric and
freeform optical surfaces. Freeform metrology systems must accurately characterize the full …

To guarantee the manufacturing quality of industrial metal parts, it is important for three-
dimensional measuring their shapes on production line. When using digital fringe projection …

Phase measuring deflectometry is a powerful measurement tool of optical surfaces, but the
measuring accuracy relies on the quality of system calibration. Calibration errors arise from …

In the domain of phase measuring deflectometry (or fringe projection profilometry), utilizing
only a single-frame fringe pattern to achieve high-precision three-dimensional …

Phase measuring deflectometry (PMD) is a key measurement technology for specular
surfaces form measurement. Compared with conventional PMD techniques, the near optical …

Phase-shift deflectometry is a widely used high-precision gradient measurement method for
assessing the topography of specular objects. The calibration of phase-shift deflectometry …

Elastic lenses have been used in various optical systems, such as cameras, microscopes
and vision systems, to name a few. A recently reported technique consists of making the …

Phase measuring deflectometry (PMD) stands as an extremely important technique for
specular surface measurement. However, the parasitic reflection from the rear surface poses …