Journal ArticleDOI
Measurement of in-plane mechanical vibrations in the subangstrom range by use of speckle imaging
TLDR
In this article, the amplitude and phase of the mechanical signal are obtained with a high sensitivity using synchronous detection, which is applied for studying vibrations of a piezoelectrically driven Mason horn.About:
This article is published in Optics Communications.The article was published on 1978-01-01. It has received 7 citations till now. The article focuses on the topics: Speckle imaging.read more
Citations
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Measurement of small movements
TL;DR: In this paper, the photodetector output component at the frequency of the surface movement representing that movement is used to produce a speckle pattern therefrom by coherent light illumination.
Journal ArticleDOI
Statistical Properties of Spatial Derivatives of the Amplitude and Intensity of Monochromatic Speckle Patterns
TL;DR: In this article, the statistical properties of the amplitude and the intensity of a monochromatic speckle pattern as well as the behaviour of the spatial derivatives of these quantities are studied theoretically.
Journal ArticleDOI
Dynamic statistical properties of vibrating laser speckle in the diffraction field.
N. Takai,Toshimitsu Asakura +1 more
TL;DR: It is shown from numerical evaluation of the equations that the power spectral width of vibrating speckles is linearly dependent on the product of the vibration slope and the beam width except for extremely small values.
Journal ArticleDOI
Experimental Investigation of Some Statistical Properties of Monochromatic Speckle Patterns
TL;DR: In this paper, the statistical properties of monochromatic, polarized speckle patterns were studied experimentally and the intensity correlation function, the probability density of the spatial derivative of the intensity, and the average number of level crossings were measured.
Journal ArticleDOI
An ESPI apparatus with multichannel data acquisition
TL;DR: An ESPI (Electronic Speckle Pattern Interferometry) apparatus employing a linear photodiodes array for multichannel data acquisition is described in this paper, which is applied for measurements of normal displacements of surfaces when time and space resolutions are required.
References
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Laser speckle and related phenomena
TL;DR: Dainty et al. as mentioned in this paper described statistical properties of laser speckle patterns and proposed a method to reduce the number of sparseness of the laser beam in Partially Coherent Light (PCL).
Journal ArticleDOI
Displacement Measurement from Double-exposure Laser Photographs
E. Archbold,A.E. Ennos +1 more
TL;DR: In this paper, surface displacement can be measured by recording a double-exposure photograph of the laser-illuminated object, followed by optical processing of the recorded speckle-pattern image.
Journal ArticleDOI
An optical homodyne technique for measurement of amplitude and phase of subangstrom ultrasonic vibrations
S. Sizgoric,A.A. Gundjian +1 more
TL;DR: In this article, an optical homodyne technique was used to measure sub-angstrom dynamic mechanical deformations in the frequency domain and in the time domain with a high sensitivity; displacements less than 10 2A were measured with normal environment acoustic noise.
Journal ArticleDOI
The measurement of depth motion by speckle photography
A.W. Lohmann,G.P. Weigelt +1 more
TL;DR: In this article, three methods for measuring the depth motion (i.e., motion in line-of-sight, not lateral) of bodies with a rough surface by multi-exposure speckle photography are proposed.
Journal ArticleDOI
Optical detection of amplitude and phase of mechanical displacements in the Åstrom range
TL;DR: In this article, the amplitude of the displacement was measured in the frequency range from 45 kHz to 45 MHz using a frequency-modulated auxiliary light beam for the mixing of light reflected from a periodically vibrating surface.
Related Papers (5)
An optical homodyne technique for measurement of amplitude and phase of subangstrom ultrasonic vibrations
S. Sizgoric,A.A. Gundjian +1 more