Results 191 to 200 of about 168,541 (274)

Evaluating residual stress in additively manufactured nitinol shape memory alloy. [PDF]

open access: yesNPJ Adv Manuf
Rangaswamy S   +7 more
europepmc   +1 more source

Speckle photography combined with speckle interferometry

open access: yesOptics and Lasers in Engineering, 2004
By combining speckle interferometry (SI) measurements with speckle photography, the fringe visibility can be kept high despite the presence of a large bulk or rotating motion of the object. This combined technique improves the usability and measuring range of both pulsed and phase-stepped SI-methods. This paper reviews the theory of fringe formation in
M Sjödahl
exaly   +3 more sources

Improved depth characterization of internal defect using the fusion of shearography and speckle interferometry

Optics and Laser Technology, 2021
A hybrid nondestructive testing (NDT) approach based on the fusion of shearography and digital speckle pattern interferometry (DSPI) is proposed for depth characterization of internal defect.
Yun Pan
exaly   +2 more sources

Contouring by speckle interferometry

Optics Letters, 1985
An optical method of generating high-constrast contours by using speckle interferometry has been proposed. To demonstrate the use of this technique the conventional dual-index immersion method has been adopted.
C Joenathan, R K Mohanty, R S Sirohi
exaly   +3 more sources

Phase-shifting speckle interferometry

Applied Optics, 1985
Speckle patterns have high frequency phase data, which make it difficult to find the absolute phase of a single speckle pattern; however, the phase of the difference between two correlated speckle patterns can be determined. This is done by applying phase-shifting techniques to speckle interferometry, which will quantitatively determine the phase of ...
Katherine Creath
exaly   +3 more sources

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