Phase extraction based on iterative algorithm using five-frame crossed fringes in phase measuring deflectometry
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2017.12.013
Abstract: Abstract In phase measuring deflectometry, two orthogonal sinusoidal fringe patterns are separately projected on the test surface and the distorted fringes reflected by the surface are recorded, each with a sequential phase shift. Then the… read more here.
Keywords: phase; phase measuring; frame crossed; five frame ... See more keywords
Phase measuring deflectometry for obtaining 3D shape of specular surface: a review of the state-of-the-art
Sign Up to like & getrecommendations! Published in 2021 at "Optical Engineering"
DOI: 10.1117/1.oe.60.2.020903
Abstract: Abstract. Phase measuring deflectometry (PMD) is a superior technique to obtain three-dimensional (3D) shape information of specular surfaces because of its advantages of large dynamic range, noncontact operation, full-field measurement, fast acquisition, high precision, and… read more here.
Keywords: shape specular; shape; pmd; measuring deflectometry ... See more keywords
Absolute phase correction for phase-measuring profilometry based on color-coded fringes
Sign Up to like & getrecommendations! Published in 2021 at "Optical Engineering"
DOI: 10.1117/1.oe.60.2.024101
Abstract: Abstract. A phase correction method that utilizes fringe color-coding in phase-measuring profilometry is proposed. Original and additional fringes are encoded into the R and B channels, respectively. The R + B channel patterns are projected… read more here.
Keywords: correction; phase measuring; color; phase correction ... See more keywords
Objective acoustic shadow detection with phase-measuring sidescan sonars
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.4989336
Abstract: Interpretation of seafloor acoustic images obtained with sidescan sonars is readily improved by applying conventional radiometric corrections that compensate for known fixed gains, for spreading and absorption losses, and for the effective instantaneous area ensonified… read more here.
Keywords: acoustic shadow; measuring sidescan; phase measuring; sidescan sonars ... See more keywords
Nondestructive determination of optical properties of a pear using spatial frequency domain imaging combined with phase-measuring profilometry.
Sign Up to like & getrecommendations! Published in 2017 at "Applied optics"
DOI: 10.1364/ao.56.008207
Abstract: Spatial frequency domain imaging (SFDI), as a rapid, noncontact, and scan-free method, can realize wide-field, quantitative optical property mapping and tomographic imaging for a biological sample. Phase-measuring profilometry (PMP) is a surface profile characterization method.… read more here.
Keywords: measuring profilometry; phase measuring; spatial frequency; domain imaging ... See more keywords
Model mismatch analysis and compensation for modal phase measuring deflectometry.
Sign Up to like & getrecommendations! Published in 2017 at "Optics express"
DOI: 10.1364/oe.25.000881
Abstract: The correspondence residuals due to the discrepancy between the reality and the shape model in use are analyzed for the modal phase measuring deflectometry. Slope residuals are calculated from these discrepancies between the modal estimation… read more here.
Keywords: phase measuring; modal phase; measuring deflectometry; compensation ... See more keywords
Deep learning-based Phase Measuring Deflectometry for single-shot 3D shape measurement and defect detection of specular objects.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.464452
Abstract: Phase Measuring Deflectometry (PMD) and Structured-Light Modulation Analysis Technique (SMAT) perform effectively in shape and defect measurements of specular objects, but the difficulty of giving consideration to accuracy and speed has also restricted the further… read more here.
Keywords: phase; measuring deflectometry; specular objects; deep learning ... See more keywords
Phase-measuring time-gated BOCDA.
Sign Up to like & getrecommendations! Published in 2017 at "Optics letters"
DOI: 10.1364/ol.42.003924
Abstract: We demonstrate a simple scheme that allows performing distributed Brillouin phase spectrum (BPS) measurements with very high spatial resolution (∼7 cm) over long (∼4.7 km) optical fibers. This is achieved by inserting a Sagnac interferometer (SI) in… read more here.
Keywords: gated bocda; phase measuring; time; measuring time ... See more keywords
Infrared phase measuring deflectometry by using defocused binary fringe.
Sign Up to like & getrecommendations! Published in 2021 at "Optics letters"
DOI: 10.1364/ol.431044
Abstract: Three-dimensional surface information acquisition of specular objects plays an important role in the fields of automobile industry, aerospace, cultural relic protection, intelligent robotics, equipment manufacturing, and so on. Most of the existing specular surface measurement… read more here.
Keywords: fringe; measuring deflectometry; phase measuring; binary fringe ... See more keywords