Results 211 to 220 of about 55,820 (266)

Laser beam shaping profiles and propagation

Applied Optics, 2006
We consider four families of functions--the super-Gaussian, flattened Gaussian, Fermi-Dirac, and super-Lorentzian--that have been used to describe flattened irradiance profiles. We determine the shape and width parameters of the different distributions, when each flattened profile has the same radius and slope of the irradiance at its half-height point,
David L, Shealy, John A, Hoffnagle
openaire   +2 more sources

Smartphone laser beam spatial profiler

Optics Letters, 2015
A simple, low-cost, portable, smartphone-based laser beam profiler for characterizing laser beam profiles is reported. The beam profiler utilizes a phosphor silica glass plate to convert UV light into visible (green) light that can be directly imaged onto an existing smartphone CMOS chip and analyzed using a customized app.
Md Arafat, Hossain, John, Canning, Kevin, Cook, Abbas, Jamalipour   +3 more
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Photoacoustic beam profiling of pulsed lasers

Review of Scientific Instruments, 2009
We introduce a beam profiler of pulsed lasers based on the photoacoustic technique. The method assumes that the initial pressure distribution inside the acoustic cell follows the laser intensity pattern if absorbed energy relaxes rapidly. This initial pressure condition can be described as a superposition of acoustic modes of different amplitudes and ...
Martín, González, Guillermo, Santiago, Verónica, Slezak, Alejandro, Peuriot   +3 more
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Fluorometric Beam Profiling of UV MALDI Lasers

Journal of the American Society for Mass Spectrometry, 2013
The photon distribution (beam profile) of the laser as projected onto the sample is an important variable in matrix assisted laser desorption ionization mass spectrometry (MALDI-MS). Measurement of the beam profile is, therefore, an important factor within MALDI-MS.
Rory T, Steven, Andrew D, Palmer, Josephine, Bunch   +2 more
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Convenient spatial profiling of pulsed laser beams

Applied Optics, 1985
This paper describes a convenient method for spatial profiling of pulsed laser beams using the scanning knife-edge technique. This method is applied to a Nd:YAG laser and a chopped CO2 laser.
G, Brost, P D, Horn, A, Abtahi
openaire   +2 more sources

An online beam profiler for laser-accelerated protons

Review of Scientific Instruments, 2019
The design and operation of an online energy and spatially resolving detector based on three different scintillators for laser-driven protons are described. The device can be used for a multi-Hertz recording rate. The spatial resolution is <0.5 mm, allowing to retrieve details of the proton beam which is of interest, e.g., for radiographic ...
K M, Schwind, E, Aktan, R, Prasad, M, Cerchez, D, Eversheim, O, Willi, B, Aurand   +6 more
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Reshaping collimated laser beams with Gaussian profile to uniform profiles

Applied Optics, 1983
A set of holographic filters was developed to convert the Gaussian intensity distribution of a collimated laser beam into a uniform one. The design and the fabricating method of the holographic filters are presented and experimental results are shown.
C Y, Han, Y, Ishii, K, Murata
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Laser-beam profilers

Nature Photonics, 2007
Knowledge of a laser beam's shape and output-power distribution is critical for optimizing laser performance. Neil Savage summarizes the latest beam-profiling products on the market.
openaire   +1 more source

Laser Beam Profile Measurements

Optical Engineering, 1986
Three instruments used at Hughes Aircraft Company for making laser measurements are described. Two of the three instruments employ the conventional aperture technique for measuring beam divergence and use the aperture spatial location as the geometrical center of the beam.
openaire   +1 more source

Laser beam profiling by waveguide technique

2010 Academic Symposium on Optoelectronics and Microelectronics Technology and 10th Chinese-Russian Symposium on Laser Physics and Laser TechnologyOptoelectronics Technology (ASOT), 2010
The resonant prism-coupling technique for measuring of light beam intensity distribution is presented. This approach is based on recording of the angular dependence of intensity of the reflected laser beam in the case of excitation of guided mode in testing thin-film structure.
A. V. Shulga, A. V. Khomchenko, A. B. Sotsky   +2 more
openaire   +1 more source