Results 91 to 100 of about 107,717 (203)

Unreported ICCD Speckle Interferometry Measures of Double Stars

The Astronomical Journal
We report here on 1057 speckle interferometric double star measures obtained between 1997 and 2018 by the Center for High Angular Resolution Astronomy group at Georgia State University and the Double Star Group at the U.S. Naval Observatory.
Brian D. Mason, William I. Hartkopf
doaj   +1 more source

A hybrid technique for residual stress analysis through stress function fitting

Latin American Journal of Solids and Structures
This work presents a hybrid experimental theoretical technique for residual stresses analysis of mechanical components. It was used the blind hole technique along with the Electronic Speckle Pattern Interferometry (ESPI) method and Airy stress functions ...
Marco Antonio Martins Cavaco
doaj   +1 more source

Generation of an X-ray nanobeam of a free-electron laser using reflective optics with speckle interferometry. [PDF]

J Synchrotron Radiat, 2020
Inoue T, Matsuyama S, Yamada J, Nakamura N, Osaka T, Inoue I, Inubushi Y, Tono K, Yumoto H, Koyama T, Ohashi H, Yabashi M, Ishikawa T, Yamauchi K.   +13 more
europepmc   +1 more source

Speckle Interferometry at SOAR in 2024 and 2025

The Astronomical Journal
Results of speckle interferometry observations at the 4.1 m Southern Astrophysical Research telescope obtained during 2024–2025 are presented. We present 5316 measurements of relative positions and magnitude differences in 3532 pairs (including 524 ...
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez, Edgardo Costa   +3 more
doaj   +1 more source

Temporal Analysis of Speckle Images in Full-Field Interferometric and Camera-Based Optical Dynamic Measurement

Photonics
Vibration measurement is crucial in fields like aviation, aerospace, and automotive engineering, which are trending towards larger, lighter, and more complex structures with increasingly complicated dynamics. Consequently, measuring a structure’s dynamic
Guojun Bai, Yuchen Wei, Bing Chen, Yu Fu
doaj   +1 more source

3D digital holographic polarimetry of laser speckle fields formed by polycrystalline blood films: a tool for differential diagnosis of thyroid pathology

Frontiers in Physics
The principles and effectiveness of the method of laser polarization interferometry of dehydrated blood films (facies) for the differential diagnosis of thyroid pathology have been studied.
Olexander Ushenko, Olexander Ushenko, Olexander Bilookyi, Jun Zheng, Alexander Dubolazov, Olexander Olar, Olexander Olar, Yurii Ushenko, Yurii Ushenko, Iryna Soltys, Ivan Mikirin, Valeriy Skliarchuk, Zhebo Chen   +12 more
doaj   +1 more source

Full-field displacement measurement of corneoscleral shells by combining multi-camera speckle interferometry with 3D shape reconstruction. [PDF]

J Mech Behav Biomed Mater, 2020
Bianco G, Bruno L, Girkin CA, Fazio MA.
europepmc   +1 more source

Determination of fracture mechanics parameters on a base of local displacement measurements

Fracture and Structural Integrity, 2013
New experimental technique for a determination of the stress intensity factor (SIF) and T-stress values is developed and verified. The approach assumes combining the crack compliance method and optical interferometric measurements of local deformation ...
Yu. G. Matvienko, V.S. Pisarev, S. I. Eleonsky   +2 more
doaj  

Speckle interferometry of asteroids [PDF]

, 1988
This final report for NASA Contract NAGw-867 consists of abstracts of the first three papers in a series of four appearing in Icarus that were funded by the preceding contract NAGw-224: (1) Speckle Interferometry of Asteroids I.
Drummond, Jack
core  

Considerations on the choice of experimental parameters in residual stress measurements by hole-drilling and ESPI

Fracture and Structural Integrity, 2014
Residual stresses occur in many manufactured structures and components. Great number of investigations have been carried out to study this phenomenon.
C. Barile, C. Casavola, G. Pappalettera, C. Pappalettere   +3 more
doaj