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 …

We present a new method to measure specular free-form surfaces within seconds. We call
the measuring principlePhase Measuring Deflectometry'(PMD). With a stereo based …

Three-dimensional surface information acquisition of specular objects plays an important
role in the fields of automobile industry, aerospace, cultural relic protection, intelligent …

Deflectometry is a non-contact optical technique which uses a simple system setup to
measure and inspect specular surfaces. Conventional deflectometry methods usually need …

There is a variety of well developed methods to measure diffusely reflecting free-form
surfaces. For instance fringe projection based systems are commonly used for the …

Abstract Phase Measuring Deflectometry (PMD) is a non-contact, high dynamic-range and
full-field metrology which becomes a serious competitor to interferometry. However, the …

For phase-measuring deflectometry (PMD), the selection of light source is a crucial factor for
guaranteeing the measurement accuracy. Since visible light is sensitive to the ambient light …

Deflectometry has been widely used in topography measurement of the specular surface
due to the merits of full-field data acquisition, automatic data processing, high accuracy, and …

Phase measuring deflectometry (PMD) is a superior technique to obtain 3D shape
information of specular surfaces because of its advantages of large dynamic range, non …

Phase Measuring Deflectometry (PMD) is a meanwhile established technique for optical
measurements of specular freeform surfaces [1, 2]. The basic principle is depicted in the left …