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Moiré pattern

About: Moiré pattern is a research topic. Over the lifetime, 1917 publications have been published within this topic receiving 27176 citations. The topic is also known as: moiré fringes & moire pattern.


Papers
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Patent
19 Mar 1979
TL;DR: In this article, the authors obtain various contour moire fringes according to applications at the reproducing by using two reference grating respectively independently at the recording and reproducing.
Abstract: PURPOSE:To obtain various contour moire fringes according to applications at the reproducing by using two reference grating respectively independently at the recording and reproducing.

3 citations

Journal ArticleDOI
TL;DR: In this paper, an analytical method of predicting the intensity profile of the moire fringes formed by a three-dimensional grating is proposed, which is proved to be effective in determining the appropriate structure of the grating and the experimental conditions for directional moire topography.

3 citations

Patent
12 Jun 2018
TL;DR: In this article, a grating Moire fringe signal error detection and correction method is proposed for optical precise measurement, where the inherent relationship between the acquired data and model parameters is used to solve the deviation coefficient, the DC component, and the phasedeviation of the position information sample point in the actual signal, and whether or not the signal quality meets the subdivision requirement is viewed in real time.
Abstract: The invention relates to a grating Moire fringe signal error detection and correction method and belongs to the technical field of optical precise measurement. The method comprises steps: first, two orthogonal sine and cosine signals output by a grating are sampled by a processor to obtain a Moire fringe signal of each grating pitch of the grating, which is expressed as a period of sine and cosinesignals, and a mathematical model is established; the inherent relationship between the acquired data and model parameters is used to solve the deviation coefficient, the DC component, and the phasedeviation of the position information sample point in the actual signal, and that whether or not the signal quality meets the subdivision requirement is viewed in real time; and if not, real-time compensation of the above error is performed to obtain a corrected Moire fringe signal. When the method is used in applications requiring high-quality Moire fringe signals, such as a circular grating angle measuring system, the method can provide Moire fringe signals satisfying high-multiplier subdivision requirements, and improve the accuracy and resolution of a grating measuring system.

3 citations

Journal ArticleDOI
TL;DR: The phase shift method, well known in holographic interferometry, is applied to the deformation of line gratings using the moire effect but it determines local displacement or strain from the grey values of three shifted images instead of the coordinates of the fringes.
Abstract: The phase shift method, well known in holographic interferometry, is applied to the deformation of line gratings. The method uses the moire effect but it determines local displacement or strain from the grey values of three shifted images instead of the coordinates of the fringes. The basic equations are derived from the transmittance function. The theoretical error with respect to a given displacement field is calculated by simulation. Real errors are investigated by related plotter-generated line gratings. The phase shift method is especially suitable for automatic digital image processing.

3 citations

Journal ArticleDOI
TL;DR: In this paper, two diffractometers (linear spectrometers) were used for spatial filtering of the moire fringes formed between a reference grid and a photographic copy of a strained specimen grid.
Abstract: Two diffractometers (linear spectrometers) are described, for spatial filtering of the moire fringes formed between a reference grid and a photographic copy of a strained specimen grid. Simple adjustments of the diffractometers enable initial apparent strains to be superimposed on the strained grid, and the location of the fringe pattern to be changed by known displacements of the reference grid. Both of these adjustments considerably increase the precision of the analysis.

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023181
2022321
202126
202048
201946
201844