Absolute and pixel-wise measurements of vibration amplitudes using time-averaged digital holography

Psota, Pavel; Mokrý, Pavel; Lédl, Vít; Stašík, Marek; Matoušek, Ondřej; Kredba, Jan

doi:10.1016/j.optlaseng.2019.04.002

Cited by 14 publications

(5 citation statements)

References 16 publications

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“…in order to suppress undesired optical aberration. The interference phase can be used to determine the desired physical quantity such as temperature [8], shape [9], refractive index [10], vibration amplitudes [11] or density/ isentropic Mach number [7] as in this particular case. So far, we have considered only single wavelength SCI, with the unambiguity range of the wavelength of the light.…”

Section: High-speed Two Wavelength Interferometrymentioning

confidence: 99%

Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade

Psota

Kredba

Stašík

et al. 2023

J. Phys.: Conf. Ser.

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Section: High-speed Two Wavelength Interferometrymentioning

confidence: 99%

Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade

Psota

Kredba

Stašík

et al. 2023

J. Phys.: Conf. Ser.

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“…Consequently, several non-destructive testing and evaluation tools have emerged, solidifying their status as effective and reliable methods. Key among these is various forms of optical metrology, such as interferometry [7,8], shearography [9], speckle interferometry [10], and holographic interferometry [3,11,12], each offering unique advantages in the realm of vibration analysis and materials testing.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Micro-Vibration Measurement Based on Orbital Angular Momentum

Zhu,

Zou,

Wang

et al. 2023

Photonics

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In this study, we introduce a novel approach for dynamic micro-vibration measurement, employing an Orbital Angular Momentum (OAM) interferometer, where the reference beam is Gaussian (GS) and the measurement beam is OAM. The OAM light reflected back from the target carries information about the target’s vibrations. The interference of the OAM light with Gaussian light generates petal-shaped patterns, and the target’s vibration information can be measured by detecting the rotation angle of these petals. Our proposed method demonstrates enhanced tolerance to misalignment and superior precision. The effects of vibration frequency, CCD frame rates, and Topological Charges (TCs) on measurement accuracy are analyzed thoroughly. Experimental results reveal that the proposed method offers a higher accuracy (up to 22.34 nm) and an extended measurement range of (0–800 cm). These capabilities render our technique highly suitable for applications demanding nanometer-scale resolution in various fields, including precision engineering and advanced optical systems.

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“…There is a vast field of applications of DHI and other interference based methods including: entertainment display [8], imaging heat transfer and mass transfer [7,[9][10][11][12][13], research in free convection [14,15], visualization of the 3D velocity vector field in turbulent boundary layer [6], analysis of supersonic jets [6], biological (living cell imaging) [6,16], environmental applications [6,17], precision measurements [8,18,19], small displacements [20], thermomechanical analysis and non-destructive testing [6], microscopy and high-resolution volume imagery [21,22], vibrometry [23,24], topography [25,26], process monitoring [7], computerized tomography [7,27], and so on. This paper aims at investigating heat transfer problems.…”

Section: Introductionmentioning

confidence: 99%

Digital Holographic Interferometry for the Measurement of Symmetrical Temperature Fields in Liquids

et al. 2021

Self Cite

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In this paper, we present a method of quantitatively measuring in real-time the dynamic temperature field change and visualization of volumetric temperature fields generated by a 2D axial-symmetric heated fluid from a pulsatile jet in a water tank through off-axis digital holographic interferometry. A Mach-Zehnder interferometer on portable platform was built for the experimental investigation. The pulsatile jet was submerged in a water tank and fed with water with higher temperature. Tomographic approach was used to reconstruct the temperature fields through the Abel Transform and the filtered back-projection. Averaged results, tomographic view, standard deviation and errors are presented. The presented results reveal digital holographic interferometry as a powerful technique to visualize temperature fields in flowing liquids and gases.

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Absolute and pixel-wise measurements of vibration amplitudes using time-averaged digital holography

Cited by 14 publications

References 16 publications

Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade

Two-wavelength interferometry for measurement of transonic airflow in a compressor blade cascade

Dynamic Micro-Vibration Measurement Based on Orbital Angular Momentum

Digital Holographic Interferometry for the Measurement of Symmetrical Temperature Fields in Liquids

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