Beam profile analyzer for CO2 lasers

López, Rosa María Tejero; Villagómez, R.

doi:10.1016/j.jart.2015.10.012

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…International Organization for Standardization (2005) methods and standards for the laser beam characterization have been described in the literature (López & Villagómez, 2015) and are commercially available. The beam quality can be measured by a Shack-Hartmann wavefront sensor.…”

Section: Introductionmentioning

confidence: 99%

A simple laser beam characterization apparatus based on imaging

Bisti¹,

Alexeev²,

Lanzetta³

et al. 2021

JART

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The development of an original low-cost hardware/software apparatus to optically control the laser beam and measure quality parameters by image analysis using a monochrome matrix sensor is described, along with experimental validation. Laser parameters, namely beam waist, divergence, Rayleigh range and M2, which are the most relevant in manufacturing operations (like optical measurement and laser processing), have been physically and mathematically characterized. Strategies for the apparatus size reduction are also presented, including the use of a prism to reduce by half the optical path, and a camera model to simulate the sensor resolution.

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Section: Introductionmentioning

confidence: 99%

A simple laser beam characterization apparatus based on imaging

Bisti¹,

Alexeev²,

Lanzetta³

et al. 2021

JART

View full text Add to dashboard Cite

show abstract

“…A broad definition of the beam profile analysis encompasses all beam properties, such as spatial, temporal and spectral characteristics, power, and propagation. The characterization of a beam is specific to the type of beam, which could be monochromatic or polychromatic . For a laser beam, parameters such as alignment, focus spot size, and beam uniformity are typically analyzed to optimize laser performance .…”

Section: Introductionmentioning

confidence: 99%

“…The characterization of a beam is specific to the type of beam, which could be monochromatic or polychromatic . For a laser beam, parameters such as alignment, focus spot size, and beam uniformity are typically analyzed to optimize laser performance . Characterizing the beamlines is also essential in particle accelerators for them to be operated with optimal output .…”

Section: Introductionmentioning

confidence: 99%

Beam profile assessment in spectral CT scanners

Anjomrouz

Shamshad

Panta

et al. 2018

J Applied Clin Med Phys

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In this paper, we present a method that uses a combination of experimental and modeled data to assess properties of x‐ray beam measured using a small‐animal spectral scanner. The spatial properties of the beam profile are characterized by beam profile shape, the angular offset along the rotational axis, and the photon count difference between experimental and modeled data at the central beam axis. Temporal stability of the beam profile is assessed by measuring intra‐ and interscan count variations. The beam profile assessment method was evaluated on several spectral CT scanners equipped with Medipix3RX‐based detectors. On a well‐calibrated spectral CT scanner, we measured an integral count error of 0.5%, intrascan count variation of 0.1%, and an interscan count variation of less than 1%. The angular offset of the beam center ranged from 0.8° to 1.6° for the studied spectral CT scanners. We also demonstrate the capability of this method to identify poor performance of the system through analyzing the deviation of the experimental beam profile from the model. This technique can, therefore, aid in monitoring the system performance to obtain a robust spectral CT; providing the reliable quantitative images. Furthermore, the accurate offset parameters of a spectral scanner provided by this method allow us to incorporate a more realistic form of the photon distribution in the polychromatic‐based image reconstruction models. Both improvements of the reliability of the system and accuracy of the volume reconstruction result in a better discrimination and quantification of the imaged materials.

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Beam profile analyzer for CO2 lasers

Cited by 2 publications

References 2 publications

A simple laser beam characterization apparatus based on imaging

A simple laser beam characterization apparatus based on imaging

Beam profile assessment in spectral CT scanners

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