R. Raschellà, I. Marino, P. P. Lottici, D. Bersani
Intensity and pure polarization holographic gratings in silica-based sol-gel thin films, containing carbazole group and Disperse Red 1, are obtained by photoisomerization at 488 nm and are investigated by means of the moving grating technique (MGT). General equations relating the modulated MGT signal to amplitudes and phase shifts of the index and absorption gratings are derived for thin films in the case of different polarization configurations. It is shown that the technique, commonly used to characterize photorefractive gratings, is a powerful tool to investigate the orientation mechanisms responsible for the holographic polarization gratings formation.
{"title":"Polarization gratings in sol-gel thin films investigated through the moving grating technique","authors":"R. Raschellà, I. Marino, P. P. Lottici, D. Bersani","doi":"10.1117/12.677301","DOIUrl":"https://doi.org/10.1117/12.677301","url":null,"abstract":"Intensity and pure polarization holographic gratings in silica-based sol-gel thin films, containing carbazole group and Disperse Red 1, are obtained by photoisomerization at 488 nm and are investigated by means of the moving grating technique (MGT). General equations relating the modulated MGT signal to amplitudes and phase shifts of the index and absorption gratings are derived for thin films in the case of different polarization configurations. It is shown that the technique, commonly used to characterize photorefractive gratings, is a powerful tool to investigate the orientation mechanisms responsible for the holographic polarization gratings formation.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132246740","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. Hermerschmidt, Gunther Wernicke, S. Krüger, A. Langner, H. Gruber, M. Dürr
Liquid crystal panels, originally designed and fabricated for projection systems, are used as spatial light modulator in optical correlators or in fringe projection systems. An adapted driver electronics and measurements of the phase modulation behavior can lead to a dynamical phase modulating system with an almost linear modulation and a maximum phase shift of 2π. We built up a system with a LCD based spatial light modulator in order to realize the optical the reconstruction of digital holograms. Hologram reconstructions and the use of holographic interferograms for deformation detection are presented and future developments and applications are discussed.
{"title":"High resolution coherent optical reconstruction of digital holograms and their applications","authors":"A. Hermerschmidt, Gunther Wernicke, S. Krüger, A. Langner, H. Gruber, M. Dürr","doi":"10.1117/12.677161","DOIUrl":"https://doi.org/10.1117/12.677161","url":null,"abstract":"Liquid crystal panels, originally designed and fabricated for projection systems, are used as spatial light modulator in optical correlators or in fringe projection systems. An adapted driver electronics and measurements of the phase modulation behavior can lead to a dynamical phase modulating system with an almost linear modulation and a maximum phase shift of 2π. We built up a system with a LCD based spatial light modulator in order to realize the optical the reconstruction of digital holograms. Hologram reconstructions and the use of holographic interferograms for deformation detection are presented and future developments and applications are discussed.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122923008","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}
V. Sainov, J. Harizanova, Sonja Ossikovska, W. Van Paepegem, J. Degrieck, P. Boone
Fringes projection and speckle shear interferometry are used for testing of subjected to cycling loading (pressure) composite vessel. As the sensitivity of the applied methods could vary in broad limits in comparison with the other interferometric techniques, the inspection is realized in a wide dynamic range. Two spacing phase stepping fringes projection interferometry is applied for absolute coordinate measurement. Derivatives of in-plane and out-of-the-plane components of the displacement vector over the object surface are obtained by lateral speckle shear interferometry in static loading (pressure). Non-linear mechanical response and fatigue of composite material are clearly detected after cyclic sinusoidal loading by macro measurement using lateral speckle shear interferometry. Fringes projection and speckle-shear interferometry are suitable for shape and normal displacements measurements in a wider dynamic range. The other advantage of the shown methods is connected with the possibility to realize compact and portable devices for in-situ inspection of investigated objects - machine parts and constructions.
{"title":"Testing of fibers reinforced composite vessel by fringes projection and speckle shear interferometry","authors":"V. Sainov, J. Harizanova, Sonja Ossikovska, W. Van Paepegem, J. Degrieck, P. Boone","doi":"10.1117/12.677286","DOIUrl":"https://doi.org/10.1117/12.677286","url":null,"abstract":"Fringes projection and speckle shear interferometry are used for testing of subjected to cycling loading (pressure) composite vessel. As the sensitivity of the applied methods could vary in broad limits in comparison with the other interferometric techniques, the inspection is realized in a wide dynamic range. Two spacing phase stepping fringes projection interferometry is applied for absolute coordinate measurement. Derivatives of in-plane and out-of-the-plane components of the displacement vector over the object surface are obtained by lateral speckle shear interferometry in static loading (pressure). Non-linear mechanical response and fatigue of composite material are clearly detected after cyclic sinusoidal loading by macro measurement using lateral speckle shear interferometry. Fringes projection and speckle-shear interferometry are suitable for shape and normal displacements measurements in a wider dynamic range. The other advantage of the shown methods is connected with the possibility to realize compact and portable devices for in-situ inspection of investigated objects - machine parts and constructions.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128412145","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 transform-domain fringe pattern denoising technique is presented. The Discrete Cosine Transform (DCT) is applied in a sliding window manner to get an overcomplete image expansion, and then the transform coefficients are thresholded to reduce the noise. We investigate the proper size of the sliding window and the proper threshold level. The latter is determined individually for each window position using a local noise variance estimate. In order to deal with a rather inadequate but simplified noise model, a proportionality factor, related with the speckle size, is found by experiments with digitally simulated speckle fringes. Such a proportionality factor suggests that the technique could be made fully automatic. We demonstrate promising results in denoising of real speckle fringe patterns, obtained through an out-of-plane sensitive Digital Speckle Pattern Interferometry (DSPI) set-up in a process of non-destructive testing of reinforced composite materials deformation.
{"title":"Threshold selection in transform-domain denoising of speckle pattern fringes","authors":"A. Shulev, A. Gotchev, A. Foi, I. Roussev","doi":"10.1117/12.677284","DOIUrl":"https://doi.org/10.1117/12.677284","url":null,"abstract":"A transform-domain fringe pattern denoising technique is presented. The Discrete Cosine Transform (DCT) is applied in a sliding window manner to get an overcomplete image expansion, and then the transform coefficients are thresholded to reduce the noise. We investigate the proper size of the sliding window and the proper threshold level. The latter is determined individually for each window position using a local noise variance estimate. In order to deal with a rather inadequate but simplified noise model, a proportionality factor, related with the speckle size, is found by experiments with digitally simulated speckle fringes. Such a proportionality factor suggests that the technique could be made fully automatic. We demonstrate promising results in denoising of real speckle fringe patterns, obtained through an out-of-plane sensitive Digital Speckle Pattern Interferometry (DSPI) set-up in a process of non-destructive testing of reinforced composite materials deformation.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114567590","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. Kamshilin, D. Semenov, E. Nippolainen, E. Raita
We present novel technique for fast non-contact and continuous profile measurements of rough surfaces by use of dynamic speckles. The dynamic speckle pattern is generated when the laser beam scans the surface under study. The most impressive feature of the proposed technique is its ability to work at extremely high scanning speed of hundreds meters per second. The technique is based on the continuous frequency measurements of the light-power modulation after spatial filtering of the scattered light. The complete optical-electronic system was designed and fabricated for fast measurement of the speckles velocity, its recalculation into the distance, and further data acquisition into computer. The measured surface profile is displayed in a PC monitor in real time. The response time of the measuring system is below 1 μs. Important parameters of the system such as accuracy, range of measurements, and spatial resolution are analyzed. Limits of the spatial filtering technique used for continuous tracking of the speckle-pattern velocity are shown. Possible ways of further improvement of the measurements accuracy are demonstrated. Owing to its extremely fast operation, the proposed technique could be applied for online control of the 3D-shape of complex objects (e.g., electronic circuits) during their assembling.
{"title":"Computer acquisition of 3D images utilizing dynamic speckles","authors":"A. Kamshilin, D. Semenov, E. Nippolainen, E. Raita","doi":"10.1117/12.677058","DOIUrl":"https://doi.org/10.1117/12.677058","url":null,"abstract":"We present novel technique for fast non-contact and continuous profile measurements of rough surfaces by use of dynamic speckles. The dynamic speckle pattern is generated when the laser beam scans the surface under study. The most impressive feature of the proposed technique is its ability to work at extremely high scanning speed of hundreds meters per second. The technique is based on the continuous frequency measurements of the light-power modulation after spatial filtering of the scattered light. The complete optical-electronic system was designed and fabricated for fast measurement of the speckles velocity, its recalculation into the distance, and further data acquisition into computer. The measured surface profile is displayed in a PC monitor in real time. The response time of the measuring system is below 1 μs. Important parameters of the system such as accuracy, range of measurements, and spatial resolution are analyzed. Limits of the spatial filtering technique used for continuous tracking of the speckle-pattern velocity are shown. Possible ways of further improvement of the measurements accuracy are demonstrated. Owing to its extremely fast operation, the proposed technique could be applied for online control of the 3D-shape of complex objects (e.g., electronic circuits) during their assembling.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127131788","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. Kelly, M. R. Gleeson, F. O'Neill, J. Sheridan, S. Gallego, C. Neipp
The Nonlocal Polymer Driven Diffusion (NPDD) model successfully predicts high spatial frequency cut-off and higher harmonic generation, experimentally evident in holographic gratings recorded in free radical chain photopolymer materials. In this paper the NPDD model is extended to include a nonlocal material temporal response. Previously it was assumed that following a brief transient period, the spatial effect of chain growth was instantaneous. However, where the use of short exposures is necessary, as in optical data storage, temporal effects become more significant. Assuming that the effect of past chain initiations will have less effect on monomer concentration at a later point in time than current initiations, a normalized exponential function is proposed to describe the process. The extended diffusion model is then solved using a Finite-Difference Time-Domain technique to predict the evolution of the monomer and polymer concentrations during and after grating recording. The Lorentz-Lorenz relation is used to determine the corresponding refractive index modulation and The Rigorous Coupled Wave Method applied to determine and/or process diffraction efficiencies. A fitting technique is then used which first solves the diffusion model as described and determines a set of parameters which give best fits to the experimental data. Results show that the inclusion of the nonlocal temporal response is necessary to accurately describe grating evolution for short exposures i.e. continued polymer chain growth for some period after recording resulting in an increase in the refractive index modulation. Monomer diffusion is also shown to influence refractive index modulation post-exposure. Monomer diffusion rates determined to be of the order of D ~ 10-11 cm2/s and the time constant of the nonlocal material temporal response function being of the order of τn ~ 10-2s.
{"title":"Examination of the temporal and kinetic effects in acrylamide based photopolymer using the nonlocal polymer driven diffusion model (NPDD)","authors":"J. Kelly, M. R. Gleeson, F. O'Neill, J. Sheridan, S. Gallego, C. Neipp","doi":"10.1117/12.676506","DOIUrl":"https://doi.org/10.1117/12.676506","url":null,"abstract":"The Nonlocal Polymer Driven Diffusion (NPDD) model successfully predicts high spatial frequency cut-off and higher harmonic generation, experimentally evident in holographic gratings recorded in free radical chain photopolymer materials. In this paper the NPDD model is extended to include a nonlocal material temporal response. Previously it was assumed that following a brief transient period, the spatial effect of chain growth was instantaneous. However, where the use of short exposures is necessary, as in optical data storage, temporal effects become more significant. Assuming that the effect of past chain initiations will have less effect on monomer concentration at a later point in time than current initiations, a normalized exponential function is proposed to describe the process. The extended diffusion model is then solved using a Finite-Difference Time-Domain technique to predict the evolution of the monomer and polymer concentrations during and after grating recording. The Lorentz-Lorenz relation is used to determine the corresponding refractive index modulation and The Rigorous Coupled Wave Method applied to determine and/or process diffraction efficiencies. A fitting technique is then used which first solves the diffusion model as described and determines a set of parameters which give best fits to the experimental data. Results show that the inclusion of the nonlocal temporal response is necessary to accurately describe grating evolution for short exposures i.e. continued polymer chain growth for some period after recording resulting in an increase in the refractive index modulation. Monomer diffusion is also shown to influence refractive index modulation post-exposure. Monomer diffusion rates determined to be of the order of D ~ 10-11 cm2/s and the time constant of the nonlocal material temporal response function being of the order of τn ~ 10-2s.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114565758","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}
Thin chalcogenide (As-S, As-Se, Ge-Se, etc.) films find applications in many branches of modern optics: for design of optical systems operating in VIS and IR, as recording material for holographic storage, or as inorganic photoresists, etc. Very thin films are included in multi-layered CD-R and DVD structures for improvements of their performance and increase of storage capacity. That is why developments of different methods for determination of optical constants (n - refractive index, k - extinction coefficient and d - physical thickness) best adapted for concrete optical problems are still needed. Recently we have presented a method for (n, k, d) evaluation of very thin metal or semiconductor films from spectrophotometric data. Here we present investigation of the optical constants of vacuum deposited As-Se thin layers with d between 15 and 30 nm. The dispersion of the complex refractive index is studied in the spectral range of 400 - 1000 nm. The obtained results are interpreted within the frame of single oscillator Wemple-DiDomenico model. Comparison is made with data on thicker evaporated layers. We demonstrate the importance of the analysis of the uncertainties in (n, k, d) determination for the adequate choice of the film physical thickness.
薄硫族化合物(as - s, as - se, Ge-Se等)薄膜在现代光学的许多分支中都有应用:用于设计可见光和红外光学系统，作为全息存储的记录材料，或作为无机光阻剂等。为了改善CD-R和DVD的性能和增加存储容量，在多层CD-R和DVD结构中加入了非常薄的薄膜。这就是为什么仍然需要发展不同的方法来确定最适合具体光学问题的光学常数(n -折射率，k -消光系数和d -物理厚度)。最近，我们提出了一种方法(n, k, d)评价非常薄的金属或半导体薄膜的分光光度数据。本文研究了d在15 ~ 30 nm之间的真空沉积As-Se薄层的光学常数。研究了复合折射率在400 ~ 1000 nm光谱范围内的色散特性。所得结果在单振子Wemple-DiDomenico模型框架内解释。与较厚蒸发层的数据进行了比较。我们证明了(n, k, d)测定中的不确定度分析对于适当选择薄膜物理厚度的重要性。
{"title":"Optical response of very thin As-Se films","authors":"P. Gushterova, P. Sharlandjiev, K. Petkov","doi":"10.1117/12.677012","DOIUrl":"https://doi.org/10.1117/12.677012","url":null,"abstract":"Thin chalcogenide (As-S, As-Se, Ge-Se, etc.) films find applications in many branches of modern optics: for design of optical systems operating in VIS and IR, as recording material for holographic storage, or as inorganic photoresists, etc. Very thin films are included in multi-layered CD-R and DVD structures for improvements of their performance and increase of storage capacity. That is why developments of different methods for determination of optical constants (n - refractive index, k - extinction coefficient and d - physical thickness) best adapted for concrete optical problems are still needed. Recently we have presented a method for (n, k, d) evaluation of very thin metal or semiconductor films from spectrophotometric data. Here we present investigation of the optical constants of vacuum deposited As-Se thin layers with d between 15 and 30 nm. The dispersion of the complex refractive index is studied in the spectral range of 400 - 1000 nm. The obtained results are interpreted within the frame of single oscillator Wemple-DiDomenico model. Comparison is made with data on thicker evaporated layers. We demonstrate the importance of the analysis of the uncertainties in (n, k, d) determination for the adequate choice of the film physical thickness.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128272623","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}
S. Martin, I. Naydenova, J. Raghavendra, R. Howard, V. Toal
In our most recent study diffusion constants were measured in the simplified monoacrylamide version of a dry acrylamide based photopolymer holographic recording material developed in the Centre for Industrial and Engineering Optics. In this paper we report diffusion constants for the commonly used photopolymer formulation, which also contains the crosslinker bisacrylamide. A physical model for the recording mechanism is proposed which explains the two way diffusion observed in both systems, and is in agreement with much of the previously observed behaviour of the material, particularly in regard to dependence of diffraction efficiency growth on spatial frequency and persistence of holographic gratings under uniform exposure. The model is also supported by direct observation, under a surface profiler, of the boundary between an illuminated and un-illuminated area at the photopolymer surface.
{"title":"Two way diffusion model for the recording mechanism in a self developing dry acrylamide photopolymer","authors":"S. Martin, I. Naydenova, J. Raghavendra, R. Howard, V. Toal","doi":"10.1117/12.676501","DOIUrl":"https://doi.org/10.1117/12.676501","url":null,"abstract":"In our most recent study diffusion constants were measured in the simplified monoacrylamide version of a dry acrylamide based photopolymer holographic recording material developed in the Centre for Industrial and Engineering Optics. In this paper we report diffusion constants for the commonly used photopolymer formulation, which also contains the crosslinker bisacrylamide. A physical model for the recording mechanism is proposed which explains the two way diffusion observed in both systems, and is in agreement with much of the previously observed behaviour of the material, particularly in regard to dependence of diffraction efficiency growth on spatial frequency and persistence of holographic gratings under uniform exposure. The model is also supported by direct observation, under a surface profiler, of the boundary between an illuminated and un-illuminated area at the photopolymer surface.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133752241","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}
This study investigates the optical characteristics of biopolymer films from gelatin, mannan and glucomannan. Glucomannan was produced from the yeast strain Sporobolomyces salmonicolor, isolated from lichem samples from the region of the Bulgarian Base on Jirings for Island, Antarctica. Transmission spectra of gelatin, mannan and glucomarinan in the visible, NIR and JR region of the electromagnetic spectrum have been taken. The refraction indices of biopolymer water solutions studied and of the films obtained from them for two wavelengths have been measured. The dispersion coefficients of Sellmeier of the film and the liquid phase of the given polymers have been calculated. The temperature dependence of refraction index of the given polymers has been studied by means of Refractometer Abbe.
{"title":"Optical characteristics of biopolymer films from gelatin, mannan, and glucomannan","authors":"K. Nikolova, I. Panchev, S. Sainov, K. Pavlova","doi":"10.1117/12.676747","DOIUrl":"https://doi.org/10.1117/12.676747","url":null,"abstract":"This study investigates the optical characteristics of biopolymer films from gelatin, mannan and glucomannan. Glucomannan was produced from the yeast strain Sporobolomyces salmonicolor, isolated from lichem samples from the region of the Bulgarian Base on Jirings for Island, Antarctica. Transmission spectra of gelatin, mannan and glucomarinan in the visible, NIR and JR region of the electromagnetic spectrum have been taken. The refraction indices of biopolymer water solutions studied and of the films obtained from them for two wavelengths have been measured. The dispersion coefficients of Sellmeier of the film and the liquid phase of the given polymers have been calculated. The temperature dependence of refraction index of the given polymers has been studied by means of Refractometer Abbe.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125937793","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}
An exact analysis of the scalar coherent monochromatic light field produced by a deflectable mirror array device is presented. The three-dimensional light field is related to the tilt angles of the mirrors. The first Rayleigh-Sommerfeld diffraction formula is used to model the diffraction. The analysis is carried out based on the assumption that the mirrors can be tilted with continuously varying angles, so the field produced by a finite (discrete) set of possible tilt angles is included as a special case.
{"title":"Analysis of the complex light field generated by a deflectable mirror array device","authors":"Erdem Ulusoy, L. Onural, Haldun M. Özaktas","doi":"10.1117/12.677163","DOIUrl":"https://doi.org/10.1117/12.677163","url":null,"abstract":"An exact analysis of the scalar coherent monochromatic light field produced by a deflectable mirror array device is presented. The three-dimensional light field is related to the tilt angles of the mirrors. The first Rayleigh-Sommerfeld diffraction formula is used to model the diffraction. The analysis is carried out based on the assumption that the mirrors can be tilted with continuously varying angles, so the field produced by a finite (discrete) set of possible tilt angles is included as a special case.","PeriodicalId":266048,"journal":{"name":"International Conference on Holography, Optical Recording, and Processing of Information","volume":"6252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130457945","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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