Výsledky vyhledávání - "N. G. Gaggioli"

Speckle correlation used to study the oxidation process in real time

Autor: N G Gaggioli, G H Guedes, Mikiya Muramatsu

Publikováno v: Optics & Laser Technology. 26:167-168

The aim of the present paper is to report preliminary results on the use of optical correlation of speckle patterns to detect and analyse the metallic oxidation phenomena in real time at environmental temperatures.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::78cadaf6d2349ee909253e3c9c38530d
https://doi.org/10.1016/0030-3992(94)90038-8

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Tilting of a diffusing surface determinated by the direct observation of its photographically recorded speckle

Autor: E N Hogert, N G Gaggioli

Publikováno v: Journal of Optics. 17:203-207

A very simple method for the determination of a surface inclination is presented. The method is based on the direct analysis of the photographic record of two speckle-patterns produced by the diffusing surface, when illuminated by a single wavelength

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::89d59408445e04b271a575a5a433184a
https://doi.org/10.1088/0150-536x/17/4/006

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A new method for noncoherent image processing by using an astigmatic system

Autor: P Bouchaud, N G Gaggioli

Publikováno v: Journal of Optics. 14:93-105

When a point on a uniform background is observed through an astigmatic system (for instance, cylindrical lenses), the image will be a segment which is perpendicular to the cylinder. A line parallel to the cylinder would give an almost invisible image

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e83ef6fb0996bb4be9dd676bfe6eafcd
https://doi.org/10.1088/0150-536x/14/2/005

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Determination of a laser source temporal-spatial degree of coherence

Autor: P Bouchaud, N G Gaggioli

Publikováno v: Journal of Optics. 13:289-292

Describes a simple method for nearly simultaneous measurement of a laser source spatial degree of coherence and coherence length. Modifying the Twymann-Green method, and after a 180 degrees rotation of one of the split beams, it is possible to produc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ec0559e2cc013489eb0fea2aab8d3c5
https://doi.org/10.1088/0150-536x/13/5/005

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Speckle Pattern Direct Photographic Correlation For Measuring Surface Roughness

Autor: José J. Lunazzi, E. N. Hogert, N. G. Gaggioli, M. S. Sthel

Publikováno v: SPIE Proceedings.

The absolute measurement of the intensity correlation of a speckle pattern was previously demonstrated by using a photographic real-time technique (1). In this paper we demonstrate its use for the measurement of surface roughness in the 1-30,μm rang

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::417a9bb9c5cee993794cf6f9febfe2bc
https://doi.org/10.1117/12.967396

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