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Relevant bibliographies by topics / Lasers Mirrors Vibration

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Journal articles
Dissertations / Theses
Conference papers

Academic literature on the topic 'Lasers Mirrors Vibration'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "Lasers Mirrors Vibration"

1

Castellini, Paolo, Milena Martarelli, and Enrico Primo Tomasini. "Laser Doppler Vibrometry for Structural Dynamic Characterization of Rotating Machinery." Applied Mechanics and Materials 415 (September 2013): 538–43. http://dx.doi.org/10.4028/www.scientific.net/amm.415.538.

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Laser Doppler Vibrometry (LDV) is a well established technique able to accurately measure vibration velocity of any kind of structure in remote, i.e. non-intrusive way, this allowing to overcome the problem of mass loading, typical of contact sensors as accelerometers and strain-gauges, which has strong influence in case of lightweight structures. Moreover, the possibility of driving automatically the laser beam, by means of moving mirrors controlled with galvanometer servo-actuators, permits to perform scanning measurements at different locations with high spatial resolution and reduced testi

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Stanbridge, A. B., and D. J. Ewins. "Measurement of Translational and Angular Vibration Using a Scanning Laser Doppler Vibrometer." Shock and Vibration 3, no. 2 (1996): 141–52. http://dx.doi.org/10.1155/1996/737569.

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An experimental procedure for obtaining angular and translational vibration in one measurement, using a continuously scanning laser Doppler vibrometer, is described. Sinusoidal scanning, in a straight line, enables one angular vibration component to be measured, but by circular scanning, two principal angular vibrations and their directions can be derived directly from the frequency response sidebands. Examples of measurements on a rigid cube are given. Processes of narrow-band random excitation and modal analysis are illustrated with reference to measurements on a freely suspended beam. Sideb

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Shanin, Yu I., and A. V. Chernykh. "Automatic Control Systems for Adaptive Optical Systems. Analytical review. Part 2: Application of the Adaptive Filtering and Control at the Spaced Frequencies." Mechanical Engineering and Computer Science, no. 4 (May 8, 2018): 13–31. http://dx.doi.org/10.24108/0418.0001342.

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The second part of the analytical review considers in detail an adaptive filtering application in the systems of adaptive optical systems (AOS) from the perspective of the airborne laser platforms. Herein the AOS operates under aero-optical distortions and vibrations, which further complicate the propagation of the laser beam. Adaptive filtering is considered as a way to improve the efficiency of the control system of adaptive optical systems, allowing to improve running an adaptive optics control loop: by 1.5-2 times with compensation for only the aero-optical disturbances, by 1.5 times with

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Saito, Hiroshi, Hongjin Jung, Eiji Shamoto, Shinya Suganuma, and Fumihiro Itoigawa. "Mirror Surface Machining of Steel by Elliptical Vibration Cutting with Diamond-Coated Tools Sharpened by Pulse Laser Grinding." International Journal of Automation Technology 12, no. 4 (2018): 573–81. http://dx.doi.org/10.20965/ijat.2018.p0573.

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Low-cost mirror surface machining of die steel is proposed in this research by applying elliptical vibration cutting with diamond-coated tools sharpened by pulse laser grinding (PLG). It is well known that conventional diamond cutting cannot be applied to die steel owing to rapid tool wear. Several attempts have been reported to prevent rapid tool wear, such as using ultrasonic elliptical vibration cutting. The ultrasonic elliptical vibration cutting developed by the authors to achieve mirror surface finish on die steel and prevent rapid wear is widely used in the industry. However, high-cost

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Bluss, K., A. Atvars, I. Brice, and J. Alnis. "Broadband Fabry–Pérot Resonator From Zerodur for Laser Stabilisation Below 1KHZ Linewidth With < 100 HZ/S Drift and Reduced Sensitivity to Vibrations." Latvian Journal of Physics and Technical Sciences 52, no. 3 (2015): 11–20. http://dx.doi.org/10.1515/lpts-2015-0014.

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Abstract Here we demonstrate the results of creating a two-mirror Fabry-Pérot resonator (FPR) that allows achieving the spectral width of a stabilised laser line below 1 kHz. It had low expansion Zerodur spacer and broadband high reflectance mirrors (99.85% in the range of 630 to 1140 nm). FPR was vertically mid-plane mounted for reduced sensitivity to vibrations and included in two shields inside a vacuum chamber to lower temperature fluctuations. Peltier element was used for temperature stabilisation at zero-expansion temperature. Pound-Drever-Hall (PDH) technique was applied. The signal fro

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Zhang, Chi, Yun Han Chen, Zheng You, and Hu Huang. "Research on Two-Dimensional Scanning Characteristics of MEMS Resonant Mirror." Key Engineering Materials 503 (February 2012): 24–28. http://dx.doi.org/10.4028/www.scientific.net/kem.503.24.

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A two-dimensional MEMS resonant mirror is presented in this paper, which is capable of scanning a laser beam two-dimensionally in the both vibration modes. Based on the MEMS resonant mirror, a simulation method is presented to study the two-dimensional scanning characteristics. The scanning time of a frame is obtained and the impacts on the scanning time of a frame by the scanning parameters are simulated and analyzed. The simulation results have a great significance for the two-dimensional MEMS resonant mirror in space applications.

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Hagemeier, Sebastian, Stanislav Tereschenko, and Peter Lehmann. "High-speed laser interferometric distance sensor with reference mirror oscillating at ultrasonic frequencies." tm - Technisches Messen 86, no. 3 (2019): 164–74. http://dx.doi.org/10.1515/teme-2019-0012.

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AbstractOptical measurement systems are an important part of the portfolio of 3D topography sensors. By precise, contactless and rapid measurements these sensors constitute an alternative to tactile instruments. In this contribution the principle of a laser interferometric distance sensor is presented, which in combination with lateral scan axes acts as a topography sensor and also as distance sensor for the compensation of vibrations in a coherence scanning Linnik interferometer. An advantage of this distance sensor is its high acquisition rate of height values, which in case of working as a

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Yuan, Guang Min, Wei Zheng Yuan, Yao Bo Liu, and Hong Long Chang. "Application of Laser Doppler Technique in Detecting the Dynamic Parameter of MEMS Device." Key Engineering Materials 562-565 (July 2013): 1083–87. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.1083.

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In order to test the dynamic performance of MEMS devices accurately, the laser Doppler vibrometer was adopted to test the frequency characteristics and surface vibration of the MEMS scanning mirror. The measuring formulas of the object motion velocity and displacement were derived. A kind of MEMS scanning mirror was tested using the established optical testing system. The measurement results show that the resonance frequency characteristic and the transient response characteristic is 269Hz and 60ms respectively which are consistent with the theoretical analysis. The method has significant refe

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Bucher, Izhak, and Oded Wertheim. "Measuring Spatial Vibration Using Continuous Laser Scanning." Shock and Vibration 7, no. 4 (2000): 203–8. http://dx.doi.org/10.1155/2000/214348.

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This paper presents a method, which allows one to use a single point laser vibrometer as a continuous sensor measuring along a line or a 2D surface. The mathematical background of the curve-fitting procedure and the necessary signal processing allowing one to extract the amplitude of sinusoidal vibration are discussed. In the current work, use has been made with an ordinary laser interferometer equipped with glavanometer-based x, y mirros. This system is not designed for continuous scanning therefore some effort needs to be spent in order to overcome the dynamical characteristics of this syste

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Grasas, Carlos, and Juan Jesus García. "Measurement of in-service vibration of interior mirrors using virtual laser technique." ATZ worldwide 103, no. 10 (2001): 12–15. http://dx.doi.org/10.1007/bf03224514.

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Dissertations / Theses on the topic "Lasers Mirrors Vibration"

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Salman, Muhammad. "Continuous scanning laser doppler vibrometry for synchronized array measurements: applications to non-contact sensing of human body vibrations." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45792.

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Laser Doppler Vibrometry (LDV) is a non-contact technique for sensing surface vibrations. Traditionally, LDV uses one or more fixed beams to measure the vibrational velocity of specific points and orientations. In order to measure an angular velocity at least two laser beams are required. Instead, this research proposes to develop a Continuous Scanning Laser Doppler Vibrometer (CSLDV) technique, based on a single laser beam continuously sweeping the area of interest using a scanning mirror. Linear scans allow the measurement of normal and angular velocity while circular scans allow the mea

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Unal, Ugur. "Optomechanical Analysis And Experimental Validation Of Bonding Based Prism And Mirror Mounts In A Laser System." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614161/index.pdf.

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In this thesis, different optomechanical design and adhesive configurations for mounting mirrors and prisms used in a laser system are investigated. Maintaining stability and strength of optical components of a laser device is difficult especially if the system is to be used in military environment. In order to determine the strength of prism mounts to high acceleration levels, mathematical correlations derived by Yoder are used. By use of these mathematical correlations, safety factor of different prism mounts and adhesive configurations are calculated for an acceleration level of 40g. So as

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Wang, Wei Ya, and 王薇雅. "Study of mechanical vibration and loss of silicon cantilever for development of the high-reflection mirror in the laser interference gravitational wave detector." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/69544360811064344605.

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Conference papers on the topic "Lasers Mirrors Vibration"

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Tomac, Mehmet N., Kevin Yugulis, and James W. Gregory. "Investigation of Side-View Mirror Flow-Induced Vibration Phenomena." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30887.

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The primary objective of this research is to develop an understanding of the flow mechanisms which induce side-view mirror vibrations. The unsteady nature of the flow over side-view mirrors causes unsteady aerodynamic load distributions and flow-induced vibrations on the mirror assembly. These vibrations generate blurred rear-view images and higher noise levels, affecting the safety and comfort of the passengers. Geometrical design features of side-view mirrors exacerbate the flow-induced vibration levels of the mirror assembly significantly. This work quantifies the impact of these design fea

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Lu, Yifan, Honghao Yue, Zongquan Deng, and Hornsen Tzou. "Experiments on Quasi-Static and Dynamic Control of a PVDF Laminated Membrane-Like Mirror." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66265.

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Due to their merits of low areal density, in-orbit deploying and low manufacturing cost properties, membrane-like deformable mirrors meet the ultra-lightweight and large aperture demand of space optical mirror systems well. Membrane-like mirrors has therefore become a hot spot in the field of space science research now. Surface of these in-orbit membrane-like structures are susceptible to external environment variation on account of their low stiffness and high flexibility properties. Once excited by external excitations, the membrane vibration endures and this would not only degrade its perfo

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Zhou, Hai, Jun-Wei Zhang, Dong-Hui Lin, and Yi Zhou. "The Structure Micro-Vibration Response Analysis of Large Scale Precision Mirror Mount." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41236.

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The stability of Laser beams in the high power solid laser facility is the guarantee of target practice successfully, so the laser beams have a strict request to the stability of all kind of optical elements and their mounts structure in the facility. Broadband Ambient Vibration, local vibration, transient temperature change and so on are all the factors that cause the instability of mirror mount. Among these factors, broadband ambient vibration takes a large percentage. Aiming at the problem of a large scale precision mirror mount’s structure stability under the excitation of ambient vibratio

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O’Malley, Patrick F., John A. Judge, and Joseph F. Vignola. "Three Dimensional Vibration Measurements Using a Five-Axis Scanning Laser Vibrometry System." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35094.

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This paper describes an experimental facility designed to measure three-dimensional velocity components using a five-axis laser vibrometry system. A single-point laser Doppler vibrometer (LDV) is mounted on three orthogonal translation stages, and the beam is directed to the target specimen by means of a mirror mounted at the intersection of the axes of two rotational stages. The result is a system with which the vibration of points on the surface of the test specimen can be measured from multiple angles, and these multiple measured components of the surface velocity are combined to determine

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Rothberg, Steve J., and Mario Tirabassi. "Are rotating wedges a feasible alternative to dual mirrors for scanning and tracking LDV?" In 10TH INTERNATIONAL CONFERENCE ON VIBRATION MEASUREMENTS BY LASER AND NONCONTACT TECHNIQUES - AIVELA 2012. AIP, 2012. http://dx.doi.org/10.1063/1.4730537.

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Bhattacharya, M., P. L. Giscard, and P. Meystre. "Entangling the ro-vibrational modes of a macroscopic mirror using radiation pressure." In Laser Science. OSA, 2008. http://dx.doi.org/10.1364/ls.2008.lma5.

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Yang, Shifei, David Ehrhardt, and Matthew S. Allen. "A Review of Signal Processing Techniques for Continuous-Scan Laser Doppler Vibrometry." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34972.

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A Laser Doppler Vibrometer (LDV) measures the laser Doppler frequency shift and converts it to the velocity at a point of a structure along the laser beam direction. In commercially available scanning LDV, the laser is redirected by a pair of orthogonal mirrors from one point to another, measuring the responses at these points sequentially. Continuous-Scan Laser Doppler Vibrometry (CSLDV) is built on scanning LDV; the laser sweeps continuously over a structure while recording the response along the laser path. The continuous-scan approach can greatly accelerate modal testing, providing spatial

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Павлов, Илья, Il'ya Pavlov, Ирина Расковская, Irina Raskovskaya, Бронюс Ринкевичюс, and Bronyus Rinkevichyus. "The Influence of the Speckle Structure of the Scattered Laser Radiation on the Measurement Error of the Rough Surface Vibration Displacement." In 29th International Conference on Computer Graphics, Image Processing and Computer Vision, Visualization Systems and the Virtual Environment GraphiCon'2019. Bryansk State Technical University, 2019. http://dx.doi.org/10.30987/graphicon-2019-1-82-86.

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The influence of the speckle structure of the scattered laser radiation on the measurement error of the rough surface vibration displacementusing laser Doppler vibrometer assembled according to a differential scheme is studied. The scheme of the experimental setup for investigation of characteristics of laser beam reflected from different surfaces is described and the obtaineed experimental images are given. It is shown that the structure of a reflected and scattered beam highly dependent on parameters of roughness of an investigated surface. Based on the results of numerical simulation, chara

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Kaya, Necmettin, and M. Onur Genç. "Design Optimization of a Beam Structure of Machine Tools." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-12299.

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Abstract In order to improve the dynamic behavior and cutting accuracy of an industrial laser cutting machine tool, a new beam structure was designed using topology optimization technique. Beams hold the cutting head and laser beam mirrors of laser cutting machine tools. Weight, static and dynamic stiffness of the beam affect the dynamic performance of the machine tool. High weight and low dynamic stiffness in high acceleration and deceleration will result in the vibration of the machine body. In this paper, a new beam is designed using topology optimization to reduce the weight of the beam st

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Orzechowski, Pawel K., Steve Gibson, and Tsu-Chin Tsao. "Disturbance Rejection by Optimal Feedback Control in a Laser Beam Steering System." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60253.

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This paper presents an optimal control design and experimental implementation for pointing and disturbance rejection in a laser steam steering system. The linear quadratic Gaussian (LQG) controller, which includes a stochastic disturbance model, as well as integral action, was designed and implemented to compensate for disturbances due to atmospheric turbulence in the optical path and mechanical vibration of the laser and optical components. The control design also considers the situation where the stochastic disturbances applied to the two beam axes are correlated and renders a multi-input-mu

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