Journal ArticleDOI
Double grating interferometers II. Application to collimated beams
P. Hariharan,Z.S. Hegedus +1 more
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TLDR
The application of a shearing interferometer consisting of two identical gratings to measurements of the aberrations of collimated beams is described in this paper, where the theory of the system is derived, and it is shown how the shear as well as the tilt between the sheared wavefronts can be varied.About:
This article is published in Optics Communications.The article was published on 1975-05-01. It has received 17 citations till now. The article focuses on the topics: Collimated light & Shearing interferometer.read more
Citations
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Journal ArticleDOI
The use of a coherent gradient sensor in dynamic mixed-mode fracture mechanics experiments
TL;DR: In this paper, coherent gradient sensing (CGS) was used to quantify mixed-mode crack tip deformation fields accurately under dynamic loading conditions, and it was shown that a shift from primarily mode II deformation to primarily mode I deformation occurs.
Journal ArticleDOI
Analysis of coherent gradient sensing (CGS) by fourier optics
TL;DR: In this paper, a more precise analysis based on Fourier optics is presented, which is interpreted by means of wave optics, using the Fraunhofer approximation and the paraxial theory of lenses.
Journal ArticleDOI
Electronic speckle pattern shearing interferometer using holographic gratings
Charles Joenathan,Lutz Buerkle +1 more
TL;DR: In this article, a holographic grating placed in front of the ground glass screen is used to shear the two images and to introduce phase stepping, and two identical holographic gratings separated by a disentance introduce shearing and the distance between two gratings can be used to control the size of shearing.
Journal ArticleDOI
On the sensitivity of Coherent Gradient Sensing: Part I—A theoretical investigation of accuracy in fracture mechanics applications
Hugh A. Bruck,Ares J. Rosakis +1 more
TL;DR: In this article, a theoretical comparison of the accuracy in interpreting fringe data as gradients (geometric interpretation) and finite differences (physical interpretation) of deformations associated with a K-dominant stress field near the tip of a stationary crack is conducted.
Journal ArticleDOI
Grating shearing interferometer with variable shear and fringe orientation.
TL;DR: A lateral shear interferometer using Ronchi rulings, spatial filtering, and moire technique is described and the experimental verification of principles is given.
References
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Journal ArticleDOI
An interferometer based on the Talbot effect
Adolf W. Lohmann,D.E. Silva +1 more
TL;DR: In this article, the performance of a Fourier imaging instrument can be understood in terms of the Talbot effect (also called "Fourier imaging" or "self-imaging").
Journal ArticleDOI
Shearing interferometer using the grating as the beam splitter.
Shunsuke Yokozeki,Tatsuro Suzuki +1 more
TL;DR: The theoretical interpretation of the shearing interferometer based on the moiré method using the fourier image of the grating is described and applications to measurement of the phase gradient and lens aberration are shown.
Journal ArticleDOI
Double grating interferometer with variable lateral shear
TL;DR: In this paper, a modified Ronchi interferometer using two identical gratings is described, which is suitable for the measurement of small, zonal aberrations, since the shear can be changed continuously by rotating one grating with respect to the other, while the direction and magnitude of the tilt between the sheared wavefronts can be varied by adjusting the distances of the two gratings from the centre of the gaussian sphere.
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