Journal ArticleDOI
Collimation test by double grating shearing interferometer
TLDR
The double grating shearing interferometry method for determination of the degree of light collimation is described, representing a very strong argument proving the highly diffractive (wave optics) character of the classical Ronchi test.Abstract:
The double grating shearing interferometry method for determination of the degree of light collimation is described. High accuracy is obtained by performing the observation of fringes in the area of the size twice as big as the one usually assumed in shearing interferometry experiments. The conditions under which such a detection mode is feasible are derived. They represent at the same time a very strong argument proving the highly diffractive (wave optics) character of the classical Ronchi test.read more
Citations
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Book ChapterDOI
I The Self-Imaging Phenomenon and its Applications
TL;DR: In this paper, the authors discuss the theoretical and applicational aspects of the self-imaging phenomenon, that is, the property of the Fresnel diffraction field of some objects illuminated by a spatially coherent light beam.
Journal ArticleDOI
Double wedge plate shearing interferometer for collimation test
TL;DR: La methode proposee pour le test de collimation fournit une reference qui ne requiert pas une orientation precise du montage plaque-coin.
Journal ArticleDOI
Improved collimation testing using Talbot interferometry.
TL;DR: Several schemes for checking collimation of a light beam based on the self-imaging (Talbot effect) combined with the moire technique have been described.
Patent
Laser surface treatment
Walter W. Duley,Grant Kinsman +1 more
TL;DR: In this paper, a method of modifying the reflectivity and emissivity of a surface of a material comprises the steps of irradiating the surface with a beam of coherent pulsed radiation at a power sufficient to generate a surface plasma and scanning said beam across said surface.
Journal ArticleDOI
Improved techniques of collimation testing
TL;DR: Improved techniques of collimation testing based on Talbot imaging and shearing interferometry are presented in this paper, which carry their own reference pattern to indicate collimation of the light beam.
References
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Journal ArticleDOI
Forty Years of History of a Grating Interferometer
TL;DR: In this paper, the effect of diffraction gratings on the path of a wave affected by any aberration is investigated from an interferential viewpoint and a wave theory of shadows is formulated.
Journal ArticleDOI
The use of a single plane parallel plate as a lateral shearing interferometer with a visible gas laser source.
TL;DR: In this paper, a high-intensity interference pattern was obtained in a shearing interferometer with the use of a visible gas laser and a simple construction, where the high intensity of the laser per unit of solid angle gave an interference pattern that is visible in room light.
Journal ArticleDOI
Fourier Images: I - The Point Source
J M Cowley,A F Moodie +1 more
TL;DR: In this article, the Fourier image is used for the imaging of real crystal lattices by light or electron optical systems, and a qualitative appeal to communication theory suggests that it should be possible to devise systems of higher efficiency than the conventional microscope by using a priori knowledge of periodicity.
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
Fourier Images IV: The Phase Grating
J M Cowley,A F Moodie +1 more
TL;DR: In this article, a detailed investigation of the intensity distribution on planes mid-way between, and in the immediate neighbourhood of Fourier image planes, was made for the particular case of the sinusoidal grating and also for the general two-dimensional periodic object.