Results 101 to 110 of about 28,756 (270)

Two-step phase shifting differential-recording digital holographic microscopy

open access: yesScientific Reports, 2017
We present two-step phase-shifting differential-recording digital holographic microscopy (TPD-DH in microscopy) for phase imaging of microscopic transparent elements.
Jun-He Han   +4 more
doaj   +1 more source

Hybrid Reflective Interferometric System Combining Wide-Field and Single-Point Phase Measurements

open access: yesIEEE Photonics Journal, 2015
We present a hybrid scan-free reflective interferometric system, which combines a wide-field phase measurement, together with a single-point phase measurement, for optical inspection of thin reflective elements.
Reut Friedman, Natan T. Shaked
doaj   +1 more source

The Application of Digital Holographic Speckle Pattern Interferometry to the Structural Condition Study of a Plaster Sample

open access: yesPhotonics
We use non-destructive Digital Holographic Speckle Pattern Interferometry (DHSPI), post-processing image analysis and one-dimensional exponential analysis to visualize, map and describe the structural condition of a plaster-based material.
Kyriaki Kosma, Vivi Tornari
doaj   +1 more source

DIGITAL HOLOGRAPHIC INTERFEROMETRY AS A METHOD FOR ANALYZING LASER-INDUCED MICRODILATION PROCESS

open access: diamond, 2023
Agustín Götte   +11 more
openalex   +2 more sources

Reconstruction of a three-dimensional, transonic rotor flow field from holographic interferogram data [PDF]

open access: yes
Holographic interferometry and computerized aided tomography (CAT) are used to determine the transonic velocity field of a model rotor blade in hover. A pulsed ruby laser recorded 40 interferograms with a 2 ft dia view field near the model rotor blade ...
Kittleson, John K., Yu, Yung H.
core   +1 more source

Adaptive Aperture Defocused Digital Speckle Photography

open access: yes, 2005
Speckle photography can be used to monitor deformations of solid surfaces. The measuring characteristics, such as range or lateral resolution depend heavily on the optical recording and illumination set-up.
Diazdelacruz, Jose M.
core   +1 more source

Scan and paint: theory and practice of a sound field visualization method

open access: yes, 2013
Sound visualization techniques have played a key role in the development of acoustics throughout history. The development of measurement apparatus and techniques for displaying sound and vibration phenomena has provided excellent tools for building ...
Carrillo Pousa, Graciano   +4 more
core   +2 more sources

Propagation of the measurement uncertainty in Fourier transform digital holographic interferometry [PDF]

open access: bronze, 2016
Ángel F. Doval   +3 more
openalex   +1 more source

Study of optical techniques for the Ames unitary wind tunnels. Part 4: Model deformation [PDF]

open access: yes
A survey of systems capable of model deformation measurements was conducted. The survey included stereo-cameras, scanners, and digitizers. Moire, holographic, and heterodyne interferometry techniques were also looked at.
Lee, George
core   +1 more source

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