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Progressive power lens measurement by low coherence speckle interferometry
(2013-07-01)
This work proposes a method for dioptric power mapping of progressive lenses through dual wavelength, low-coherence digital speckle pattern interferometry. Lens characterization finds several applications and is extremely ...
Progressive power lens measurement by low coherence speckle interferometry
(2013-07-01)
This work proposes a method for dioptric power mapping of progressive lenses through dual wavelength, low-coherence digital speckle pattern interferometry. Lens characterization finds several applications and is extremely ...
Measuring micro-displacements of specular surfaces using speckle interferometry
(Cornell University, 2018-12)
The displacement field of an object surface can be measured by using speckle interferometry. This technique is based on the phenomenon of laser speckle and consists in correlating speckle interferograms taken after and ...
Comparison of phase recovery methods in spiral speckle pattern interferometry correlation fringes
(Elsevier, 2016-05)
Spiral interferometry can be used as a solution to the problem of sign ambiguity presented in the conventional speckle pattern interferometric technique when the optical phase needs to be reconstructed from a single closed ...
Extraction of dynamic speckle activity information from digital holograms
(Society of Photo-Optical Instrumentation Engineers, 2016-12)
In this work we show how dynamic speckle information can be extracted directly from digital holograms. This allows improving the analysis and characterization of dynamic phenomena by combining dynamic speckle with digital ...
Measurement of the local displacement field generated by a microindentation using digital speckle pattern interferometry and its application to investigate coating adhesion
(Elsevier, 2009-05)
This paper presents a technique to investigate the adhesion of thin coatings which combines digital speckle pattern interferometry and an indentation test. The proposed approach is based on the measurement of the local ...
Characterization of drying paint coatings by dynamic speckle and holographic interferometry measurements
(Optical Society of America, 2016-05)
In this work we implemented dynamic speckle and holographic interferometry techniques to characterize the drying process of solvent-based paint coatings. We propose a simple way to estimate drying time by measuring speckle ...
Robust phase recovery in temporal speckle pattern interferometry using a 3D directional wavelet transform
(Optical Society of America, 2009-08)
We propose an approach based on a 3D directional wavelet transform to retrieve optical phase distributions in temporal speckle pattern interferometry. We show that this approach can effectively recover phase distributions ...
Evaluation of the piezoelectric behaviour produced by a thick-film transducer using digital speckle pattern interferometry
(Elsevier, 2011-02)
This paper presents an interferometric measurement of the out-of-plane deflections produced by a piezoelectric transducer, manufactured by thick-film deposition of a ceramic paste over an alumina substrate, when is subjected ...