Results 11 to 20 of about 82,150 (265)
A new sensor for laser tomography on ELTs [PDF]
1st AO4ELT conference - Adaptive Optics for Extremely Large Telescopes, 2009 We present a new concept for an optical differentiation wavefront sensor, featuring a high number of phase measurements across the pupil, with a linear response versus the phase gradient. We show measurements with this sensor, obtained though turbulence on elongated laser spots.
Gendron, Éric +7 more
openaire +2 more sources
Control of Frequency Combs with Passive Resonators
Sensors, 2023 Tailored optical frequency combs are generated by nesting passive etalons within mode-locked oscillators. In this work, the oscillator generates a comb of 6.8 GHz with 106 MHz side-bands.
James Hendrie +2 more
doaj +1 more source
Applied Sciences, 2022 A compact laser scatterometric device for determining the fat percentage of milk filling a cylindrical tube has been designed. The device operates by detecting the angular distribution of the scattered radiation of a semiconductor laser using an axial ...
Alexey V. Shkirin +5 more
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Characterization of Scintillating X-ray Optical Fiber Sensors
Sensors, 2014 The paper presents a set of tests carried out in order to evaluate the design characteristics and the operating performance of a set of six X-ray extrinsic optical fiber sensors.
Dan Sporea +5 more
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Phase Nanoscopy with Correlated Frequency Combs
Sensors, 2022 This study addresses any sensor based on measuring a physical quantity through the phase of a probing beam. This includes sensing of rotation, acceleration, index change, displacement, fields… While most phase measurements are made by detecting an ...
Xiaobing Zhu +2 more
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Sensors, 2021 The paper presents the contemporary displacement measurement systems used in geotechnical laboratories during the determination of soil precise mechanical parameters, e.g., the shear modules G: initial and in the range of small and very small strains. In
Małgorzata Jastrzębska
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Sensors, 2022 The development of light detection and ranging (lidar) technology began in the 1960s, following the invention of the laser, which represents the central component of this system, integrating laser scanning with an inertial measurement unit (IMU) and ...
Nikola Lopac +3 more
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Low Power Greenhouse Gas Sensors for Unmanned Aerial Vehicles
Remote Sensing, 2012 We demonstrate compact, low power, lightweight laser-based sensors for measuring trace gas species in the atmosphere designed specifically for electronic unmanned aerial vehicle (UAV) platforms.
David J. Lary +8 more
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Self-Mixing Laser Distance-Sensor Enhanced by Multiple Modulation Waveforms
Sensors, 2022 Optical rangefinders based on Self-Mixing Interferometry are widely described in literature, but not yet on the market as commercial instruments. The main reason is that it is relatively easy to propose new elaboration techniques and get results in ...
Federico Cavedo +2 more
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Intracavity Measurement Sensitivity Enhancement without Runaway Noise
Sensors, 2021 A method to increase the sensitivity of an intracavity differential phase measurement that is not made irrelevant by a larger increase of noise is explored.
Luke Horstman, Jean-Claude Diels
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