We design tellurite and As2S3-based chalcogenide tapered photonic crystal fibers (TPCF) for broadband mid-infrared coherent supercontinuum (SC) generation in the few optical-cycle-regime. By injecting pre-chirped femtosecond pulses, the soliton self-compression is optimized and then, we show the generation of more than one octave-spanning SC spectra with low input pulse energies in both TPCF having 8 mm-length.
{"title":"Broadband coherent mid-IR supercontinuum generation using highly nonlinear tapered photonic crystal fibers","authors":"A. Ben Salem, R. Chérif, M. Zghal","doi":"10.1117/12.2027491","DOIUrl":"https://doi.org/10.1117/12.2027491","url":null,"abstract":"We design tellurite and As2S3-based chalcogenide tapered photonic crystal fibers (TPCF) for broadband mid-infrared coherent supercontinuum (SC) generation in the few optical-cycle-regime. By injecting pre-chirped femtosecond pulses, the soliton self-compression is optimized and then, we show the generation of more than one octave-spanning SC spectra with low input pulse energies in both TPCF having 8 mm-length.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128999214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, white light interferometry is applied to perform wavelength calibration of a dispersive spectrometer .The relation between wavelength and position in the spectrometer detector is obtained from the wavelength-dependent phase difference at the output of the interferometer. In the proposed method, no suppositions are made about the spectrum of the illumination source; it is only required to make a simple assumption about dispersion in the spectrometer to be measured and to perform a Taylor expansion of the phase difference. A sample of calibration of a home-made spectrometer serves to discuss different issues that affect the calibration.
{"title":"White light interferometry applied to wavelength calibration of spectrometers","authors":"H. González-Núñez, R. de la Fuente","doi":"10.1117/12.2026187","DOIUrl":"https://doi.org/10.1117/12.2026187","url":null,"abstract":"In this work, white light interferometry is applied to perform wavelength calibration of a dispersive spectrometer .The relation between wavelength and position in the spectrometer detector is obtained from the wavelength-dependent phase difference at the output of the interferometer. In the proposed method, no suppositions are made about the spectrum of the illumination source; it is only required to make a simple assumption about dispersion in the spectrometer to be measured and to perform a Taylor expansion of the phase difference. A sample of calibration of a home-made spectrometer serves to discuss different issues that affect the calibration.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"123 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133713190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Mulone, N. Budini, F. Vincitorio, C. Freyre, A. L. López Díaz, A. Ramil Rego
This work seeks to determine the age of a fruit from observation of its dynamic speckle pattern. A mobile speckle pattern originates on the fruit's surface due to the interference of the wavefronts reflected from moving scatterers. For this work we analyzed two series of photographs of a strawberry speckle pattern, at different stages of ripening, acquired with a CMOS camera. The first day, we took ten photographs at an interval of one second. The same procedure was repeated the next day. From each series of images we extracted several statistical descriptors of pixel-to-pixel gray level variation during the observation time. By comparing these values from the first to the second day we noticed a diminution of the speckle activity. This decay demonstrated that after only one day the ripening process of the strawberry can be detected by dynamic speckle pattern analysis. For this study we employed a simple new algorithm to process the data obtained from the photographs. This algorithm allows defining a global mobility index that indicates the evolution of the fruit's ripening.
{"title":"Analysis of strawberry ripening by dynamic speckle measurements","authors":"C. Mulone, N. Budini, F. Vincitorio, C. Freyre, A. L. López Díaz, A. Ramil Rego","doi":"10.1117/12.2022414","DOIUrl":"https://doi.org/10.1117/12.2022414","url":null,"abstract":"This work seeks to determine the age of a fruit from observation of its dynamic speckle pattern. A mobile speckle pattern originates on the fruit's surface due to the interference of the wavefronts reflected from moving scatterers. For this work we analyzed two series of photographs of a strawberry speckle pattern, at different stages of ripening, acquired with a CMOS camera. The first day, we took ten photographs at an interval of one second. The same procedure was repeated the next day. From each series of images we extracted several statistical descriptors of pixel-to-pixel gray level variation during the observation time. By comparing these values from the first to the second day we noticed a diminution of the speckle activity. This decay demonstrated that after only one day the ripening process of the strawberry can be detected by dynamic speckle pattern analysis. For this study we employed a simple new algorithm to process the data obtained from the photographs. This algorithm allows defining a global mobility index that indicates the evolution of the fruit's ripening.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122543681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Retinal images are often degraded with a blur that varies across the field view. Because traditional deblurring algorithms assume the blur to be space-invariant they typically fail in the presence of space-variant blur. In this work we consider the blur to be both unknown and space-variant. To carry out the restoration, we assume that in small regions the space-variant blur can be approximated by a space-invariant point-spread function (PSF). However, instead of deblurring the image on a per-patch basis, we extend individual PSFs by linear interpolation and perform a global restoration. Because the blind estimation of local PSFs may fail we propose a strategy for the identification of valid local PSFs and perform interpolation to obtain the space-variant PSF. The method was tested on artificial and real degraded retinal images. Results show significant improvement in the visibility of subtle details like small blood vessels.
{"title":"Blind restoration of retinal images degraded by space-variant blur with adaptive blur estimation","authors":"A. Marrugo, M. S. Millán, M. Šorel, F. Šroubek","doi":"10.1117/12.2025134","DOIUrl":"https://doi.org/10.1117/12.2025134","url":null,"abstract":"Retinal images are often degraded with a blur that varies across the field view. Because traditional deblurring algorithms assume the blur to be space-invariant they typically fail in the presence of space-variant blur. In this work we consider the blur to be both unknown and space-variant. To carry out the restoration, we assume that in small regions the space-variant blur can be approximated by a space-invariant point-spread function (PSF). However, instead of deblurring the image on a per-patch basis, we extend individual PSFs by linear interpolation and perform a global restoration. Because the blind estimation of local PSFs may fail we propose a strategy for the identification of valid local PSFs and perform interpolation to obtain the space-variant PSF. The method was tested on artificial and real degraded retinal images. Results show significant improvement in the visibility of subtle details like small blood vessels.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"8785 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129187928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marta Nespereira, J. Coelho, F. Monteiro, M. Abreu, J. Rebordão
The use of CO2 lasers in the production of optical fiber sensors is a well proven application, especially in writing long period fiber gratings. The mid-infrared radiation (MIR) emitted by these lasers is highly absorbed by the glass optical fibers commonly used as fiber-based sensors, and the consequent heating easily leads to melting. Making use of this advantage, the application of this radiation in the tapering of optical fibers is demonstrated. A continuous wave emission CO2 laser is used in short duration pulses, a cylindrical lens focuses the beam on the fiber and a small weight produces the effect of pulling the fiber. The resulting tapers’ characteristics (length, degree of symmetry and central diameter, or waist) are analyzed as well as the influence of the operational parameters involved in the process (laser power, pulse duration and number of pulses). The potential of this technique is demonstrated with special attention to its use in the development of optical fiber-based sensors.
{"title":"Optical fiber tapers produced by near-infrared laser radiation","authors":"Marta Nespereira, J. Coelho, F. Monteiro, M. Abreu, J. Rebordão","doi":"10.1117/12.2026258","DOIUrl":"https://doi.org/10.1117/12.2026258","url":null,"abstract":"The use of CO2 lasers in the production of optical fiber sensors is a well proven application, especially in writing long period fiber gratings. The mid-infrared radiation (MIR) emitted by these lasers is highly absorbed by the glass optical fibers commonly used as fiber-based sensors, and the consequent heating easily leads to melting. Making use of this advantage, the application of this radiation in the tapering of optical fibers is demonstrated. A continuous wave emission CO2 laser is used in short duration pulses, a cylindrical lens focuses the beam on the fiber and a small weight produces the effect of pulling the fiber. The resulting tapers’ characteristics (length, degree of symmetry and central diameter, or waist) are analyzed as well as the influence of the operational parameters involved in the process (laser power, pulse duration and number of pulses). The potential of this technique is demonstrated with special attention to its use in the development of optical fiber-based sensors.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117104806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The introduction of Photonic Integrated Devices (PID) for applications in high speed optical networks providing multiple services to more number of users is indispensable as this requires large scale integration (LSI) and the miniaturization of PID device components to microscale platform has attracted immense attention from the researchers and entrepreneurs. In this paper, we present a comparative study on compactness of basic PID components using tooth shaped grating assisted (TSGA) geometry. The basic PID components such as Directional Coupler (DC), two mode interference (TMI) coupler and multimode interference (MMI) coupler have been designed using TSGA geometry in the coupling region and the coupling characteristics for the same have been estimated using a mathematical model based on sinusoidal mode simple effective index method (SM-SEIM). The dependence of modal power in the coupling region on the waveguide separation gap and coupling gap refractive index has been studied. From the estimated dependences of beat length and access waveguide length on waveguide separation gap with permissible propagation loss ~0.15 dB/cm, it has been found that the grating assisted TMI coupler (GA-TMI) is ~0.5 times lower than that of grating assisted DC (GA-DC) and ~0.44 times lower than grating assisted MMI (GA-MMI) coupler. Further, it is seen that the device length including access waveguide length of GA-MMI coupler is less than that of GA-TMI coupler and GA-DC. The SM-SEIM based numerical results are then compared with beam propagation method (BPM) results obtained by using commercially available optiBPM software.
{"title":"Study on compactness of planar waveguide based integrated optic couplers using tooth shaped grating assisted geometry","authors":"B. Deka, Aradhana Dutta, P. Sahu","doi":"10.1117/12.2030427","DOIUrl":"https://doi.org/10.1117/12.2030427","url":null,"abstract":"The introduction of Photonic Integrated Devices (PID) for applications in high speed optical networks providing multiple services to more number of users is indispensable as this requires large scale integration (LSI) and the miniaturization of PID device components to microscale platform has attracted immense attention from the researchers and entrepreneurs. In this paper, we present a comparative study on compactness of basic PID components using tooth shaped grating assisted (TSGA) geometry. The basic PID components such as Directional Coupler (DC), two mode interference (TMI) coupler and multimode interference (MMI) coupler have been designed using TSGA geometry in the coupling region and the coupling characteristics for the same have been estimated using a mathematical model based on sinusoidal mode simple effective index method (SM-SEIM). The dependence of modal power in the coupling region on the waveguide separation gap and coupling gap refractive index has been studied. From the estimated dependences of beat length and access waveguide length on waveguide separation gap with permissible propagation loss ~0.15 dB/cm, it has been found that the grating assisted TMI coupler (GA-TMI) is ~0.5 times lower than that of grating assisted DC (GA-DC) and ~0.44 times lower than grating assisted MMI (GA-MMI) coupler. Further, it is seen that the device length including access waveguide length of GA-MMI coupler is less than that of GA-TMI coupler and GA-DC. The SM-SEIM based numerical results are then compared with beam propagation method (BPM) results obtained by using commercially available optiBPM software.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117338584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Mastrodoménico, M. Izquierdo, J. L. Paz, P. Colmenares
The inclusion of the permanent dipole moments and the solvent on the optical conventional Bloch equations (OCBE) allowed us to obtain analytical expressions for the optical properties of a two-level molecular system. We employed the methodology developed by Colmenares et al.1, in which they model the collisional effect of the solvent through a stochastical function, ξ(t) = ω0 + σ(t), so the OCBE become a set of coupled integro-differential stochastical equations that we solved, up to third order in the incident field, employing the perturbation theory. Once obtained the analytical expressions for the density matrix elements, macroscopic polarization and effective susceptibility of the system, we studied the optical properties derived in the frequency space, inside and outside the rotating wave approximation.
在光学常规布洛赫方程(OCBE)中加入永久偶极矩和溶剂，可以得到两能级分子体系光学性质的解析表达式。我们采用了Colmenares et al.1开发的方法，其中他们通过一个随机函数(ξ(t) = ω0 + σ(t))来模拟溶剂的碰撞效应，因此OCBE成为一组耦合的积分-微分随机方程，我们使用摄动理论在入射场中求解到三阶。在得到系统的密度矩阵元、宏观极化和有效磁化率的解析表达式后，研究了在频率空间、旋转波近似内外的光学性质。
{"title":"Solvent effects on the optical properties of two-level systems with permanent dipole moments","authors":"A. Mastrodoménico, M. Izquierdo, J. L. Paz, P. Colmenares","doi":"10.1117/12.2021368","DOIUrl":"https://doi.org/10.1117/12.2021368","url":null,"abstract":"The inclusion of the permanent dipole moments and the solvent on the optical conventional Bloch equations (OCBE) allowed us to obtain analytical expressions for the optical properties of a two-level molecular system. We employed the methodology developed by Colmenares et al.1, in which they model the collisional effect of the solvent through a stochastical function, ξ(t) = ω0 + σ(t), so the OCBE become a set of coupled integro-differential stochastical equations that we solved, up to third order in the incident field, employing the perturbation theory. Once obtained the analytical expressions for the density matrix elements, macroscopic polarization and effective susceptibility of the system, we studied the optical properties derived in the frequency space, inside and outside the rotating wave approximation.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115801015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Narea, A. Muñoz, J. Castro, Rafael A. Muñoz, Caroleny E. Villalba, María F. Martinez, Kelly Bravo
Human skin has been studied in numerous investigations, given the interest in knowing information about physiology, morphology and chemical composition. These parameters can be determined using non invasively optical techniques in vivo, such as the diffuse reflectance spectroscopy. The human skin color is determined by many factors, but primarily by the amount and distribution of the pigment melanin. The melanin is produced by the melanocytes in the basal layer of the epidermis. This research characterize the spectral response of the human skin using the coefficients of Fourier series expansion. Simulating the radiative transfer equation for the Monte Carlo method to vary the concentration of the melanocytes (fme) in a simplified model of human skin. It fits relating the Fourier series coefficient a0 with fme. Therefore it is possible to recover the skin biophysical parameter.
{"title":"Parameterization using Fourier series expansion of the diffuse reflectance of human skin to vary the concentration of the melanocytes","authors":"J. Narea, A. Muñoz, J. Castro, Rafael A. Muñoz, Caroleny E. Villalba, María F. Martinez, Kelly Bravo","doi":"10.1117/12.2026247","DOIUrl":"https://doi.org/10.1117/12.2026247","url":null,"abstract":"Human skin has been studied in numerous investigations, given the interest in knowing information about physiology, morphology and chemical composition. These parameters can be determined using non invasively optical techniques in vivo, such as the diffuse reflectance spectroscopy. The human skin color is determined by many factors, but primarily by the amount and distribution of the pigment melanin. The melanin is produced by the melanocytes in the basal layer of the epidermis. This research characterize the spectral response of the human skin using the coefficients of Fourier series expansion. Simulating the radiative transfer equation for the Monte Carlo method to vary the concentration of the melanocytes (fme) in a simplified model of human skin. It fits relating the Fourier series coefficient a0 with fme. Therefore it is possible to recover the skin biophysical parameter.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116203118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Protein deposition is one of the most frequent contaminants occurring on hydrophilic contact lenses and may modify the lens optical properties. The silicone-hydrogel contact lenses usually adsorb a lower amount of proteins than the conventional hydrogel ones. However it is important to study the influence of protein deposits on some silicone-hydrogel contact lenses properties, such as UV-Visible transmittance. In this study it is measured de UV-Visible properties of new and worn silicone-hydrogel contact lenses and the transmittance changes that can occur with wear are quantified. An optical fiber spectrometer has been used for measuring the transmittance of contact lenses. This spectrometer has the advantage that the lens can be positioned horizontally and the light beam passes through it perpendicularly. For the measurements, it was necessary to make a special cuvette to put inside the lens and keep it submerged in sterile saline solution. The contact lenses used were Biofinity®. They are manufactured by CooperVision with a material whose technical name is Comfilcon A. This material has not yet been analyzed for this purpose. Moreover, in this type of studies are commonly taken lenses of power -3.00D, however we have not limited to a single power value but we have extended the range to lower and higher values regarding to the standard power in order to see how this parameter affects.
{"title":"UV-visible transmittance of silicone-hydrogel contact lenses measured with a fiber optic spectrometer","authors":"R. Fuentes, E. Fernández, I. Pascual, C. García","doi":"10.1117/12.2025710","DOIUrl":"https://doi.org/10.1117/12.2025710","url":null,"abstract":"Protein deposition is one of the most frequent contaminants occurring on hydrophilic contact lenses and may modify the lens optical properties. The silicone-hydrogel contact lenses usually adsorb a lower amount of proteins than the conventional hydrogel ones. However it is important to study the influence of protein deposits on some silicone-hydrogel contact lenses properties, such as UV-Visible transmittance. In this study it is measured de UV-Visible properties of new and worn silicone-hydrogel contact lenses and the transmittance changes that can occur with wear are quantified. An optical fiber spectrometer has been used for measuring the transmittance of contact lenses. This spectrometer has the advantage that the lens can be positioned horizontally and the light beam passes through it perpendicularly. For the measurements, it was necessary to make a special cuvette to put inside the lens and keep it submerged in sterile saline solution. The contact lenses used were Biofinity®. They are manufactured by CooperVision with a material whose technical name is Comfilcon A. This material has not yet been analyzed for this purpose. Moreover, in this type of studies are commonly taken lenses of power -3.00D, however we have not limited to a single power value but we have extended the range to lower and higher values regarding to the standard power in order to see how this parameter affects.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114717062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The quantification of the deformations presented by mechanical parts is a useful tool for several applications in engineering; regularly this quantification is performed a posteriori. In this work, a digital holographic interferometer for measuring micro-deformation at video rate is presented. The interferometer is developed with the use of the parallel paradigm of CUDA™ (Compute Unified Device Architecture). A commercial Graphics Processor Unit (GPU) is used to accelerate phase processing from the recorded holograms. The proposed method can process record holograms of 1024x1024 pixels in 48 milliseconds. At the best performance of the method, it processes 21 frames per second (FPS). This benchmark surpasses 133-times the best performance of the method on a regular CPU.
{"title":"Digital holographic interferometry accelerated with GPU: application in mechanical micro-deformation measurement operating at video rate","authors":"N. Munera Ortiz, C. Trujillo, J. Garcia-Sucerquia","doi":"10.1117/12.2021693","DOIUrl":"https://doi.org/10.1117/12.2021693","url":null,"abstract":"The quantification of the deformations presented by mechanical parts is a useful tool for several applications in engineering; regularly this quantification is performed a posteriori. In this work, a digital holographic interferometer for measuring micro-deformation at video rate is presented. The interferometer is developed with the use of the parallel paradigm of CUDA™ (Compute Unified Device Architecture). A commercial Graphics Processor Unit (GPU) is used to accelerate phase processing from the recorded holograms. The proposed method can process record holograms of 1024x1024 pixels in 48 milliseconds. At the best performance of the method, it processes 21 frames per second (FPS). This benchmark surpasses 133-times the best performance of the method on a regular CPU.","PeriodicalId":135913,"journal":{"name":"Iberoamerican Meeting of Optics and the Latin American Meeting of Optics, Lasers and Their Applications","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114731087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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