Laser Beam Analysis Using Image Processing

Alsultanny, Yas A.

doi:10.3844/jcssp.2006.109.113

Cited by 16 publications

(11 citation statements)

References 6 publications

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“…The natural frequency changes as a direct result of the change in the stacking sequence causes resonance if the changed frequency becomes closer to the working frequency. This feature is in good agreements with the results published by Aly et al (2010); Alsultanny (2006); Mardani (2008) and Hashemi et al (2007).…”

Section: Discussionsupporting

confidence: 93%

Plasma Beams Free Vibration Ivestigation using the Boubaker Polynomials Expansion Scheme

Boubaker¹

2011

Physics International

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Problem statement: In the present study, plasma beams free vibration frequencies alteration has been investigated through an original protocol. Approach: The Boubaker Polynomials Expansion scheme BPES has been performed for deducing and ranging the dimensionless frequencies of the beam vibrations. Results: Natural frequencies of the plasma beam have been estimated for given parameters values. Conclusion: Yielded results have been compared and discussed. It was found that a good agreement as the values determined with experimental results determined by previous researchers.

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Section: Discussionsupporting

confidence: 93%

Plasma Beams Free Vibration Ivestigation using the Boubaker Polynomials Expansion Scheme

Boubaker¹

2011

Physics International

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“…This phenomenon can be attributed to the Gaussian nature of the TEM 00 laser beam. The beam intensity drops from the centre towards the outer edge in the shape of a normal distribution [14]. The effective diameter of such a laser beam is quantified as the distance at which the irradiance is 1/e 2 of the maximum peak irradiance.…”

Section: Discussionmentioning

confidence: 99%

Spinodal decomposition in AISI 316L stainless steel via high-speed laser remelting

Chikarakara

Naher

Brabazon

2014

Applied Surface Science

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A 1.5 kW CO 2 pulsed laser was used to melt the surface of AISI 316L stainless steel with a view to enhancing the surface properties for engineering applications. A 90 m laser beam spot size focused onto the surface was used to provide high irradiances (up to 23.56MW/cm 2 ) with low residence times (as low as 50 s) in order to induce rapid surface melting and solidification. Variations in microstructure at different points within the laser treated region were investigated. From this processing refined lamellar and nodular microstructures were produced. These sets of unique microstructures were produced within the remelted region when the highest energy densities were selected in conjunction with the lowest residence times. The transformation from the typical austenitic structure to much finer unique lamellar and nodular structures was attributed to the high thermal gradients achieved using these selected laser processing parameters. These structures resulted in unique characteristics including elimination of cracks and a reduction of inclusions within the treated region. Grain structure reorientation between the bulk alloy and laser-treated region occurred due to the induced thermal gradients. This present article reports on microstructure forms resulting from the high-speed laser surface remelting and corresponding underlying kinetics.

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“…Based on the fundamentals of Gaussian beam propagation in wave theory, the design is possible not only in the characterization of the associated light sources in relation to their spatial confinement, considering intensity, power, and divergence, but also in relation to its angular confinement, in the form of limited wave fronts according to the paraxial approximation. It should be noted that both the design and the knowledge of the dependence of the beams, both in space and at an angle, make it possible to propose and detect the quality of the beam with precision, which is very critical in various applications, especially in biomedical related to surgery [1]. The tool has been developed in MATLAB code and the support platform for its execution is provided free of charge, in a way that the distribution of the work can be extensive.…”

Section: Discussionmentioning

confidence: 99%

“…Most laser applications consist of the impact of light on objects or materials on a given limited surface with a striking angle and spatial distribution of power strictly bounded. The objects to impact can be both light detection equipment for information systems, such as cameras, or industrial or biological materials to be drilled, melted, or heated [1]. The quality of the performance of the light impact highly depends on the features of the beam of the light source and the way these features change across the beam and along the optical axis as it propagates in free space.…”

Section: Introductionmentioning

confidence: 99%

Computer-Aided Laser-Fiber Output Beam 3D Spatial and Angular Design

et al. 2020

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Multiple laser beams and single-mode optical fibers output can be approximated by assuming that the emitted light has a symmetrical Gaussian intensity profile, which corresponds to the transverse electromagnetic mode (TEM00), which is designated as a Gaussian beam. Current free-accessible design tools are limited to the spatial analysis of the beams, in general, and to the intensity, in particular, and to the graphical visualization in 2D with very limited options. In this work, a novel a computer-aided laser-fiber output beam TEM00 designer, CATEM00, is presented based on the 3D representations typically provided by camera beam profilers, and on the fundamentals of the wave theory of light, including diverse flexibility capabilities for graphical manipulation and parameter comprehension both in terms of spatial behavior and in angular confinement. It must be highlighted that not only is the spatial limitation design of light impact relevant in TEM00 applications but, also, the angle with which the light reaches the target. Hence, the availability of capabilities of phase design in TEM00 following the paraxial limitations is highly convenient. Results and discussion in terms of intensity, power, divergence and wave fronts are presented considering a set of study cases, showing its coherence with Gaussian beam theory.

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Laser Beam Analysis Using Image Processing

Cited by 16 publications

References 6 publications

Plasma Beams Free Vibration Ivestigation using the Boubaker Polynomials Expansion Scheme

Plasma Beams Free Vibration Ivestigation using the Boubaker Polynomials Expansion Scheme

Spinodal decomposition in AISI 316L stainless steel via high-speed laser remelting

Computer-Aided Laser-Fiber Output Beam 3D Spatial and Angular Design

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