1992
DOI: 10.1117/12.57679
|View full text |Cite
|
Sign up to set email alerts
|

New speckle technique for noncontact measurement of small creep rates

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
7
0

Year Published

1995
1995
2007
2007

Publication Types

Select...
8
1

Relationship

3
6

Authors

Journals

citations
Cited by 12 publications
(7 citation statements)
references
References 12 publications
0
7
0
Order By: Relevance
“…The crux of the problem is to calculate the shift in the speckle patterns, β, as a function of record number. From this information, the strain, ε, in the sample can be calculated directly as [1][2][3][4]…”
Section: Conceptual Experimentsmentioning
confidence: 99%
See 1 more Smart Citation
“…The crux of the problem is to calculate the shift in the speckle patterns, β, as a function of record number. From this information, the strain, ε, in the sample can be calculated directly as [1][2][3][4]…”
Section: Conceptual Experimentsmentioning
confidence: 99%
“…Various algorithms have been presented in the past for estimating the shift in a laser speckle pattern originating from an object (e.g., biological tissue) undergoing a dynamic strain. These algorithms have included the transform method of processing for speckle strain rate measurements [1,2], a maximum likelihood speckle shift estimator, and a maximum entropy estimator [3,4]. In addition, to these parametric estimators, there is the traditional approach to processing speckle data that makes use of the cross correlation between successive speckle records [3,4].…”
Section: Introductionmentioning
confidence: 99%
“…6(b) is a slice through this cube such that the spatial dimension is along the horizontal axis and time is along the vertical. This type of display seems to date to Oulamara et al [9] and has been called the time history of the speckle pattern (THSP) [1] and, earlier, a stacked speckle history [10]. In other fields, notably radiography and fluorescence speckle microscopy [11], such a spatio-temporal display is called a kymograph.…”
Section: ͑19͒mentioning
confidence: 99%
“…Furthermore, for the nonimaging case, the observation distance, L o , must be established in consideration of the ͑lensless͒ camera pixel pitch, p. Specifically, to meet the Nyquist sampling criteria, it must be arranged so that the mean speckle size d sp ϭL o /Dу2p where is the wavelength, and D is the length of the uniformly illuminated stripe. 15 Large speckles can be achieved through either small spot sizes or large observation distances. Too small a spot size, however, results in the speckles being too large in the far field.…”
Section: Introductionmentioning
confidence: 99%