Structured Light Fringe Projection Setup Using Optimized Acousto-Optic Deflectors

Dupont, Samuel; Kastelik, Jean‐Claude; Pommeray, Michel

doi:10.1109/tmech.2010.2052627

Cited by 13 publications

(4 citation statements)

References 21 publications

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“…The scanning or deflection of light with high performance and broad frequency bandwidth is applied in a number of applications, including light modulators, optical beam deflectors, optical signal processors, optical tunable filters [1,2], radiofrequency (RF) spectrum analyzers [3], wavelength division multiplexing optical communication [4][5][6], optical tweezers for molecule trapping [7][8][9], optical image scanners [10][11][12], optical fringe pattern projectors [13][14][15], and optical frequency shifters [16,17]. Acousto-optic deflectors (AODs) involve interactions between lasers and acoustic waves, and the deflectors generally operate in three different modes: random access, continuous mode, and multi-frequency modes [18].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional refractive index modulation by phased array transducers in acousto-optic deflectors

et al. 2017

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Acousto-optic deflectors are photonic devices that are used for scanning high-power laser beams in advanced microprocessing applications such as marking and direct writing. The operation of conventional deflectors mostly relies on one-dimensional sinusoidal variation of the refractive index in an acousto-optic medium. Sometimes static phased array transducers, such as step configuration or planar configuration transducer architecture, are used to tilt the index modulation planes for achieving higher performance and higher resolution than a single transducer AO device. However, the index can be modulated in two dimensions, and the modulation plane can be tilted arbitrarily by creating dynamic phase gratings in the medium using phased array transducers. This type of dynamic two-dimensional acousto-optic deflector can provide better performance using, for example, a large deflection angle and high diffraction efficiency. This paper utilizes an ultrasonic beam steering approach to study the two-dimensional strain-induced index modulation due to the photoelastic effect. The modulation is numerically simulated, and the effects of various parameters, such as the operating radiofrequency of the transducers, the ultrasonic beam steering angle, and different combinations of pressure on each element of the transducer array, are demonstrated.

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Section: Introductionmentioning

confidence: 99%

Two-dimensional refractive index modulation by phased array transducers in acousto-optic deflectors

et al. 2017

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“…The acousto-optic effect is firstly proposed by Brillouin in 1922 [1] and experimentally demonstrated by Lucas and Biquard [2] in France, and Debye and Sears [3] in U.S. Much research work has been reported on the applications of AOD on frequency shifters [4], laser beam steering [5], imaging spectrometer [6], laser beam shaping [7], fringe projectors [8], multichannel communications [9] and optical tweezers [10]. The bandwidth and central frequency are the two most important design parameters of acousto-optic deflector, thus the comprehensive studies on the wideband operating mode are highly required for most applications.…”

Section: Introductionmentioning

confidence: 99%

Research on the broadband operating mode of anisotropic acousto-optic deflector using tellurium dioxide crystal

Li¹,

Gao²,

Liu³

et al. 2015

Proceedings of the 2015 International Conference on Materials, Environmental and Biological Engineering

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Abstract. Theoretical studies on the broadband operating mode of anisotropic acousto-optic deflector (AOD) using tellurium dioxide crystal are carried out, the operating properties of the bandwidth and the central frequency of the AOD are systematically studied by solving the Dixon equation that characterizes the geometrical relationships of the acousto-optic interaction. The calculation results show that the bandwidth and the central frequency of the AOD are highly depended on the off-axis angle of the ultrasonic vector, which shows linear properties in the operating bandwidth both for the +1 order and -1 order diffractions.

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“…In the interaction process, the movement of the ultrasonic wavefront causes the diffracted light to be Doppler upshifted or downshifted depending on the propagation direction of the ultrasonic wave. Acousto-optic frequency shifters (AOFS) are key components often used in a number of recent applications, including optical heterodyning and interferometry as, for example, laser Doppler velocimetry and vibrometry [1][2][3], fringe projection [4,5], optical coherence tomography [6][7][8][9], holography [10,11], spectroscopy [12,13], optical communication [14], and four-wave mixing microscopy [15]. Various optical architectures have been proposed in the literature in order to obtain low-frequency or high-frequency shifts [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Acousto-optic wide band optical low-frequency shifter

et al. 2013

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A wide bandwidth tunable optical low-frequency shifter is presented in this work. It is based on two acousto-optic devices operating in tandem. The relevant parameters of the specific configurations of acousto-optic interactions in paratellurite material are detailed. Results from numerical computations leading to the practical design parameters are given. The low-frequency shifter has been experimentally tested at a visible wavelength λ₀=514 nm and a high efficiency (>60%) has been measured. The tuning capability of the optical shifter covers a bandwidth Δf=26 MHz.

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Structured Light Fringe Projection Setup Using Optimized Acousto-Optic Deflectors

Cited by 13 publications

References 21 publications

Two-dimensional refractive index modulation by phased array transducers in acousto-optic deflectors

Two-dimensional refractive index modulation by phased array transducers in acousto-optic deflectors

Research on the broadband operating mode of anisotropic acousto-optic deflector using tellurium dioxide crystal

Acousto-optic wide band optical low-frequency shifter

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