Determination of Distortion in Scanned Images by Moiré Patterns

John C. Mckechnie

doi:10.5594/j16685

Moiré patterns: An accurate technique for determination of the locus of the centres of rotation

Journal of Biomechanics ◽

10.1016/0021-9290(85)90664-5 ◽

1985 ◽

Vol 18 (7) ◽

pp. 501-509 ◽

Cited By ~ 17

Author(s):

S.D. Gertzbein ◽

K.H. Chan ◽

M. Tile ◽

J. Seligman ◽

A. Kapasouri

Keyword(s):

Moire Patterns ◽

Moiré Patterns

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Separation of Additive and Subtractive Moire´ Patterns

Journal of Applied Mechanics ◽

10.1115/1.3408753 ◽

1971 ◽

Vol 38 (1) ◽

pp. 266-269 ◽

Cited By ~ 4

Author(s):

J. A. Clark ◽

A. J. Durelli

Keyword(s):

Experimental Determination ◽

Spatial Filtering ◽

Partial Derivatives ◽

Moire Patterns ◽

Filtering Technique ◽

Indicial Equation ◽

Moiré Patterns

Using a spatial filtering technique, moire´ patterns can be observed that correspond to different forms of the indicial equation describing the parametric properties of gratings and moire´. In particular both the additive and subtractive moire´s are obtained individually over the field. This method, combined with a previously developed method for obtaining spatial partial derivatives from deformed gratings, permits the experimental determination of the whole field of Cartesian shears and rigid rotations.

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Moire´ Patterns of Partial Derivatives of Displacement Components

Journal of Applied Mechanics ◽

10.1115/1.3625200 ◽

1966 ◽

Vol 33 (4) ◽

pp. 901-906 ◽

Cited By ~ 28

Author(s):

V. J. Parks ◽

A. J. Durelli

Keyword(s):

Nonlinear Deformation ◽

Strain Tensor ◽

Strain Analysis ◽

The Other ◽

Partial Derivatives ◽

Moire Patterns ◽

Derivatives Of ◽

Moiré Patterns

The knowledge of the partial derivatives of displacement components is essential in strain analysis. Two methods of determining these partial derivatives using moire´ effects are presented in this paper. One consists of superposing two shifted copies of the same deformed grating of lines. The other consists of superposing two shifted copies of moire´ patterns of displacement components. Explanations of the phenomena, based on the parametric properties of superposed families of lines, are given. Applications to the determination of the nonlinear deformation and strain tensor are included.

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Automatic order-determination of transient in-plane displacement moire patterns

Acta Mechanica Sinica ◽

10.1007/bf02489166 ◽

1993 ◽

Vol 9 (1) ◽

pp. 86-92 ◽

Cited By ~ 1

Author(s):

Fang Jing ◽

K. H. Laermann

Keyword(s):

Moire Patterns ◽

Plane Displacement ◽

Order Determination ◽

Moiré Patterns

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Determination of basic grids for subtractive moire patterns

Applied Optics ◽

10.1364/ao.30.001258 ◽

1991 ◽

Vol 30 (10) ◽

pp. 1258 ◽

Cited By ~ 10

Author(s):

Salvador Bara ◽

Zbigniew Jaroszewicz ◽

Andrzej Kolodziejczyk ◽

Vicente Moreno

Keyword(s):

Moire Patterns ◽

Moiré Patterns

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Moire Fringes on Precipitates in Quenched and Aged Beryllium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100101888 ◽

1968 ◽

Vol 26 ◽

pp. 426-427

Author(s):

F. J. Fraikor ◽

A. W. Brewer

Keyword(s):

Ternary Phase ◽

Volume Fraction ◽

Age Hardening ◽

Orientation Relationships ◽

Solute Content ◽

Moiré Fringes ◽

Moire Patterns ◽

Total Volume Fraction ◽

Diffraction Patterns ◽

Moiré Patterns

A number of investigators have examined moire patterns on precipitate particles in various age-hardening alloys. For example, Phillips has analyzed moire fringes at cobalt precipitates in copper and Von Heimendahl has reported on moire fringes in the system Al-Au. Recently, we have observed moire patterns on impurity precipitates in beryllium quenched in brine from 1000°C and aged at various temperatures in the range of 500-800°C. This heat treatment of beryllium rolled from vacuum cast ingots produces the precipitation of both an fee ternary phase, AlFeBe4, and an hcp binary phase, FeBe11. However, unlike a typical age-hardening alloy, the solute content of this material is low (less than 1000 ppm of Fe and 600 ppm of Al) and hence the total volume fraction of precipitates is small. Therefore there is some difficulty in distinguishing the precipitates and their orientation relationships with the beryllium matrix since the weak precipitate spots generally do not appear on the diffraction patterns.

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