Pub Date : 2023-12-20DOI: 10.1007/s10043-023-00856-2
Kazuki Chijiwa, Masanori Takabayashi
Self-referential holographic data storage (SR-HDS), which has been proposed as a novel implementation method for holographic data storage (HDS), enables holographic recording without a reference beam. In addition to the signal pattern (SP) to be recorded, an additional pattern (AP) that affects the reconstruction quality is used in SR-HDS. One of the methods for obtaining a designed AP that contributes to high-quality reconstruction involves utilizing local search algorithms, such as the hill climbing (HC) method. However, designing an AP using this method typically requires a significant amount of time. In this study, we proposed a new AP-designing method that uses a deep neural network. By training a network with pairs of SP and designed AP based on a local search algorithm, a designed AP that improves the reconstruction quality of an arbitrary SP can be instantly obtained. APs designed using the deep learning-based method improved the reconstruction quality of SPs to the same level as those designed using the method based on local search algorithm, whereas the time required to obtain one designed AP was reduced by three or four orders of magnitude.
自参考全息数据存储(SR-HDS)是作为全息数据存储(HDS)的一种新型实现方法而提出的,它可以在没有参考光束的情况下进行全息记录。除了要记录的信号图案(SP)外,SR-HDS 还使用了影响重建质量的附加图案(AP)。获得有助于高质量重建的设计 AP 的方法之一是利用局部搜索算法,如爬山法(HC)。然而,使用这种方法设计 AP 通常需要大量时间。在本研究中,我们提出了一种使用深度神经网络的新 AP 设计方法。通过使用基于局部搜索算法的 SP 和设计 AP 对网络进行训练,可以立即获得能提高任意 SP 重建质量的设计 AP。使用基于深度学习的方法设计的 AP 与使用基于局部搜索算法的方法设计的 AP 相比,能将 SP 的重建质量提高到相同水平,而获得一个设计 AP 所需的时间则减少了三到四个数量级。
{"title":"Deep learning-based design of additional patterns in self-referential holographic data storage","authors":"Kazuki Chijiwa, Masanori Takabayashi","doi":"10.1007/s10043-023-00856-2","DOIUrl":"https://doi.org/10.1007/s10043-023-00856-2","url":null,"abstract":"<p>Self-referential holographic data storage (SR-HDS), which has been proposed as a novel implementation method for holographic data storage (HDS), enables holographic recording without a reference beam. In addition to the signal pattern (SP) to be recorded, an additional pattern (AP) that affects the reconstruction quality is used in SR-HDS. One of the methods for obtaining a designed AP that contributes to high-quality reconstruction involves utilizing local search algorithms, such as the hill climbing (HC) method. However, designing an AP using this method typically requires a significant amount of time. In this study, we proposed a new AP-designing method that uses a deep neural network. By training a network with pairs of SP and designed AP based on a local search algorithm, a designed AP that improves the reconstruction quality of an arbitrary SP can be instantly obtained. APs designed using the deep learning-based method improved the reconstruction quality of SPs to the same level as those designed using the method based on local search algorithm, whereas the time required to obtain one designed AP was reduced by three or four orders of magnitude.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138770443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Division of time polarimeter (DoTP) is one of the popular imaging instruments in several applications because of its simple configuration and accurate performance. However, calibration of the optical axis of the used polarizer is also the premise of an accurate polarimeter. In this paper, a novel on-line and accurate method is proposed to calibrate the transmission angle of the polarizer using a Wollaston prism. The Wollaston prism splits the incident light into two light beams with orthogonal polarization directions, which are vertical and parallel with the beams plane, respectively. Then these two beams pass through the candidate polarizer. The detected light intensity can be adjusted by rotating the polarizer, whose position is marked by a digital encoder. The angle of optical axis of the polarizer relative to the line of points of two light beams can be solved by a series of light intensities. Finally, the optical axis of the polarizer is calibrated on-line, and the state of polarization of incident light can be measured accurately. Numerical simulation and experiments have validated the feasibility of the proposed on-line calibration method. The experimental results show that the calibration accuracy is about 0.0106° with a maximum polarization measurement error of 3.7 × 10–4. In general, the proposed calibration method is very fast, on-line, accurate, and would be a good reference for polarization imaging and polarization calibration.
{"title":"Accurate calibration on optical axis of polarizer in a polarization imaging system","authors":"Bowen Lian, Naiting Gu, Yawei Xiao, Ao Tang, Linhai Huang, Changhui Rao","doi":"10.1007/s10043-023-00851-7","DOIUrl":"https://doi.org/10.1007/s10043-023-00851-7","url":null,"abstract":"<p>Division of time polarimeter (DoTP) is one of the popular imaging instruments in several applications because of its simple configuration and accurate performance. However, calibration of the optical axis of the used polarizer is also the premise of an accurate polarimeter. In this paper, a novel on-line and accurate method is proposed to calibrate the transmission angle of the polarizer using a Wollaston prism. The Wollaston prism splits the incident light into two light beams with orthogonal polarization directions, which are vertical and parallel with the beams plane, respectively. Then these two beams pass through the candidate polarizer. The detected light intensity can be adjusted by rotating the polarizer, whose position is marked by a digital encoder. The angle of optical axis of the polarizer relative to the line of points of two light beams can be solved by a series of light intensities. Finally, the optical axis of the polarizer is calibrated on-line, and the state of polarization of incident light can be measured accurately. Numerical simulation and experiments have validated the feasibility of the proposed on-line calibration method. The experimental results show that the calibration accuracy is about 0.0106° with a maximum polarization measurement error of 3.7 × 10<sup>–4</sup>. In general, the proposed calibration method is very fast, on-line, accurate, and would be a good reference for polarization imaging and polarization calibration.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138657526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-11DOI: 10.1007/s10043-023-00848-2
Hiroki Takatsuka, Masaki Yasugi, S. Suyama, Hirotsugu Yamamoto
{"title":"Gesture recognition using deep-learning in single-pixel-imaging with high-frame-rate display with latent random dot patterns","authors":"Hiroki Takatsuka, Masaki Yasugi, S. Suyama, Hirotsugu Yamamoto","doi":"10.1007/s10043-023-00848-2","DOIUrl":"https://doi.org/10.1007/s10043-023-00848-2","url":null,"abstract":"","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138980911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-21DOI: 10.1007/s10043-023-00847-3
Hao Li, Haihong Chen, Junpan Chen, Yaqiong Zhang, Yan Piao
In this paper, we proposed a method for optimizing the pressure angle of the cam curve in a zoom system using Particle Swarm Optimization (PSO) algorithm. This method improved the design efficiency of the cam curve and effectively solved issues such as cam motion jamming caused by excessive pressure angles. Firstly, the cam structure was analyzed based on the mechanical theory. Secondly, in the phase of the pressure angle optimization, constraints were designed and a new fitness function was introduced as an indicator to obtain the optimal solution of the nonlinearly broaden parameter of the cam curve in a multidimensional space. Finally, the zoom curve of the designed 8x optical system was optimized using the proposed method. The results showed that the maximum pressure angle of the zoom group decreased from 72.7° to 44.8°, and the maximum pressure angle of the compensation group decreased from 52.6° to 44.2°. In conclusion, this method could effectively improve the performance and lifespan of cam zoom systems, providing positive guidance for the engineering application of continuous zoom systems.
{"title":"Study on pressure angle optimization for cam curve of continuous zoom system based on the particle swarm optimization","authors":"Hao Li, Haihong Chen, Junpan Chen, Yaqiong Zhang, Yan Piao","doi":"10.1007/s10043-023-00847-3","DOIUrl":"https://doi.org/10.1007/s10043-023-00847-3","url":null,"abstract":"<p>In this paper, we proposed a method for optimizing the pressure angle of the cam curve in a zoom system using Particle Swarm Optimization (PSO) algorithm. This method improved the design efficiency of the cam curve and effectively solved issues such as cam motion jamming caused by excessive pressure angles. Firstly, the cam structure was analyzed based on the mechanical theory. Secondly, in the phase of the pressure angle optimization, constraints were designed and a new fitness function was introduced as an indicator to obtain the optimal solution of the nonlinearly broaden parameter of the cam curve in a multidimensional space. Finally, the zoom curve of the designed 8x optical system was optimized using the proposed method. The results showed that the maximum pressure angle of the zoom group decreased from 72.7° to 44.8°, and the maximum pressure angle of the compensation group decreased from 52.6° to 44.2°. In conclusion, this method could effectively improve the performance and lifespan of cam zoom systems, providing positive guidance for the engineering application of continuous zoom systems.</p>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138293545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-07DOI: 10.1007/s10043-023-00842-8
Daichi Yoshihara, Hirohisa Yokota, Yoh Imai
A graded-index (GI)-type photonic crystal fiber (PCF) that has an α-power effective refractive index profile operates as a multimode optical fiber and can be applied to a collimator for single-mode PCFs. The α-power effective index distribution is realized by an α-power air hole diameter distribution with uniform air hole pitch. However, a pressure controlling in fiber drawing is difficult due to the difference of air hole diameters in fiber cross section. In this paper, we propose a GI-PCF with uniform air hole diameter while the air hole pitch varies in radial direction. Light propagation characteristics in the Gaussian beam excited GI-PCF with uniform air hole diameter were theoretically studied. The period and amplitude of mode field diameter variation along the propagation direction for the innermost air hole pitch, air hole diameter, and radial distribution profile of the pitch were clarified. The collimator application of GI-PCF with uniform air hole diameter for a conventional single-mode PCF was investigated. The suitable GI-PCF structure to obtain high optical coupling efficiency and good tolerance for GI-PCF length error was clarified. Wavelength characteristics of the GI-PCF collimator were also studied. It was clarified that the appropriate GI-PCF length was longer for shorter operating wavelength in collimator application.
{"title":"Design of graded-index-type photonic crystal fiber with uniform air hole diameter and its application to collimator for single-mode photonic crystal fiber","authors":"Daichi Yoshihara, Hirohisa Yokota, Yoh Imai","doi":"10.1007/s10043-023-00842-8","DOIUrl":"10.1007/s10043-023-00842-8","url":null,"abstract":"<div><p>A graded-index (GI)-type photonic crystal fiber (PCF) that has an <i>α</i>-power effective refractive index profile operates as a multimode optical fiber and can be applied to a collimator for single-mode PCFs. The <i>α</i>-power effective index distribution is realized by an <i>α</i>-power air hole diameter distribution with uniform air hole pitch. However, a pressure controlling in fiber drawing is difficult due to the difference of air hole diameters in fiber cross section. In this paper, we propose a GI-PCF with uniform air hole diameter while the air hole pitch varies in radial direction. Light propagation characteristics in the Gaussian beam excited GI-PCF with uniform air hole diameter were theoretically studied. The period and amplitude of mode field diameter variation along the propagation direction for the innermost air hole pitch, air hole diameter, and radial distribution profile of the pitch were clarified. The collimator application of GI-PCF with uniform air hole diameter for a conventional single-mode PCF was investigated. The suitable GI-PCF structure to obtain high optical coupling efficiency and good tolerance for GI-PCF length error was clarified. Wavelength characteristics of the GI-PCF collimator were also studied. It was clarified that the appropriate GI-PCF length was longer for shorter operating wavelength in collimator application.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We derive an equation that enables to get the floating distance of floating images of an arc 3D display by the radius of the arc, the angle of the arc 3D substrate, the light source illumination angle, and the observer’s angle. Conventional theoretical expression for the positions of the light source and observer relative to the center of the arc have been used to calculate the floating distance. However, when the arc3D substrate is inclined, it becomes more difficult to determine the floating distance from the actual positions of the light source and observer. In this paper, we derive an equation to approximate the floating distance from the positions of the light source and the observer while considering the tilt of the arc3D substrate and check the accuracy of the derived equation through experiments.
{"title":"Analysis of floating distance of arc 3D display with respect to inclination angle of substrate","authors":"Hiroto Oishi, Kengo Fujii, Masaki Yasugi, Shiro Suyama, Hirotsugu Yamamoto","doi":"10.1007/s10043-023-00841-9","DOIUrl":"10.1007/s10043-023-00841-9","url":null,"abstract":"<div><p>We derive an equation that enables to get the floating distance of floating images of an arc 3D display by the radius of the arc, the angle of the arc 3D substrate, the light source illumination angle, and the observer’s angle. Conventional theoretical expression for the positions of the light source and observer relative to the center of the arc have been used to calculate the floating distance. However, when the arc3D substrate is inclined, it becomes more difficult to determine the floating distance from the actual positions of the light source and observer. In this paper, we derive an equation to approximate the floating distance from the positions of the light source and the observer while considering the tilt of the arc3D substrate and check the accuracy of the derived equation through experiments.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1007/s10043-023-00845-5
Shinya Sakane, Shiro Suyama, Hirotsugu Yamamoto
Aerial displays for providing road information require long-distance image formation and a compact installation space. This paper proposes a compact optical system for forming long-distance floating images by introducing a Fresnel lens in an aerial imaging by retro-reflection (AIRR) optical system. In the conventional AIRR optics, since the aerial image position is the plane-symmetrical position of the light source with respect to the beam splitter, the installation space for forming a long-distance aerial image becomes huge. Our proposed method uses the virtual image formed by a Fresnel lens as the light source in an AIRR optical system. This leads to a much longer distance from the beam splitter to the aerial image than the distance from the beam splitter to the light source. We developed a prototype long-distance floating aerial display system using a large-scale Fresnel lens. As a result, the distance from the LED panel to the beam splitter was halved. Furthermore, we used two beam splitters to form two aerial images by using a single LED panel. Long-distance floating images could be formed 3.4 m and 4.6 m away from the beam splitters and could be seen with the naked eye.
{"title":"Reducing thickness of long-distance aerial display system in AIRR using Fresnel lens","authors":"Shinya Sakane, Shiro Suyama, Hirotsugu Yamamoto","doi":"10.1007/s10043-023-00845-5","DOIUrl":"10.1007/s10043-023-00845-5","url":null,"abstract":"<div><p>Aerial displays for providing road information require long-distance image formation and a compact installation space. This paper proposes a compact optical system for forming long-distance floating images by introducing a Fresnel lens in an aerial imaging by retro-reflection (AIRR) optical system. In the conventional AIRR optics, since the aerial image position is the plane-symmetrical position of the light source with respect to the beam splitter, the installation space for forming a long-distance aerial image becomes huge. Our proposed method uses the virtual image formed by a Fresnel lens as the light source in an AIRR optical system. This leads to a much longer distance from the beam splitter to the aerial image than the distance from the beam splitter to the light source. We developed a prototype long-distance floating aerial display system using a large-scale Fresnel lens. As a result, the distance from the LED panel to the beam splitter was halved. Furthermore, we used two beam splitters to form two aerial images by using a single LED panel. Long-distance floating images could be formed 3.4 m and 4.6 m away from the beam splitters and could be seen with the naked eye.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10043-023-00845-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-02DOI: 10.1007/s10043-023-00846-4
Yijian Liang, Yang Zhou
Soybean can be easily contaminated by Aspergillus flavus which can generate toxigenic and endanger human life and health. Due to the difficulty in detecting moldy phenomena at early stage by the naked eye and traditional machine vision technique, this paper proposes a classification method based on deep learning and optical coherence (OCT) techniques to detect moldy phenomenon of soybeans at early stage. The proposed method mainly includes three stages: the first stage is mildew information extraction, we use convolutional neural network (CNN) to extract image features. The input of traditional CNN is usually the whole image, and the output can not to reflect the fine-grained information. On this basis, we use the features extracted from the patch for the perception of fine-grained information (such as tiny mildew pixels). In the second stage, the features of the two channels are fused using the self-attention mechanism. In the third stage, the fused feature vectors containing the region information of moldy spots are used for classification. The results show that the proposed method is superior to the traditional CNN model in early mildew identification, with an average accuracy of 99.5% and have 15 points increasing to traditional CNN model, which proves the effectiveness of the method.
{"title":"Detection of soybean mildew infection at early stage based on optical coherence tomography and deep learning methods","authors":"Yijian Liang, Yang Zhou","doi":"10.1007/s10043-023-00846-4","DOIUrl":"10.1007/s10043-023-00846-4","url":null,"abstract":"<div><p>Soybean can be easily contaminated by <i>Aspergillus flavus</i> which can generate toxigenic and endanger human life and health. Due to the difficulty in detecting moldy phenomena at early stage by the naked eye and traditional machine vision technique, this paper proposes a classification method based on deep learning and optical coherence (OCT) techniques to detect moldy phenomenon of soybeans at early stage. The proposed method mainly includes three stages: the first stage is mildew information extraction, we use convolutional neural network (CNN) to extract image features. The input of traditional CNN is usually the whole image, and the output can not to reflect the fine-grained information. On this basis, we use the features extracted from the patch for the perception of fine-grained information (such as tiny mildew pixels). In the second stage, the features of the two channels are fused using the self-attention mechanism. In the third stage, the fused feature vectors containing the region information of moldy spots are used for classification. The results show that the proposed method is superior to the traditional CNN model in early mildew identification, with an average accuracy of 99.5% and have 15 points increasing to traditional CNN model, which proves the effectiveness of the method.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.1007/s10043-023-00844-6
Mayu Adachi, Masaki Yasugi, Shiro Suyama, Hirotsugu Yamamoto
This study proposes the method of measuring 3D object shapes in an immersive space using a motion capture system. We report on the visualizing the distortion of acrylic panels mounted on a large aerial display and measuring the aberration of the aerial image using a motion capture system. Large aerial displays are made of large acrylic panels, which are subject to distortion due to their own weight. We succeeded in visualizing the shape of the acrylic plate by motion capture and 3D plotting of the positional information. Using a motion capture system, it was found that the aerial image formed by the distorted acrylic plate exhibits astigmatism, which is the difference between the vertical and horizontal focusing position. Furthermore, by drawing the shape of the side surface of the acrylic plate using poster papers, the coordinates were extracted from the imitation paper image, the radius of curvature of the acrylic plate was calculated, and the aberration was calculated. It was found that it is possible to measure the shape in an immersive space using the motion capture.
{"title":"Method of acquiring shapes using motion capture of aerial images formed by large acrylic panels","authors":"Mayu Adachi, Masaki Yasugi, Shiro Suyama, Hirotsugu Yamamoto","doi":"10.1007/s10043-023-00844-6","DOIUrl":"10.1007/s10043-023-00844-6","url":null,"abstract":"<div><p>This study proposes the method of measuring 3D object shapes in an immersive space using a motion capture system. We report on the visualizing the distortion of acrylic panels mounted on a large aerial display and measuring the aberration of the aerial image using a motion capture system. Large aerial displays are made of large acrylic panels, which are subject to distortion due to their own weight. We succeeded in visualizing the shape of the acrylic plate by motion capture and 3D plotting of the positional information. Using a motion capture system, it was found that the aerial image formed by the distorted acrylic plate exhibits astigmatism, which is the difference between the vertical and horizontal focusing position. Furthermore, by drawing the shape of the side surface of the acrylic plate using poster papers, the coordinates were extracted from the imitation paper image, the radius of curvature of the acrylic plate was calculated, and the aberration was calculated. It was found that it is possible to measure the shape in an immersive space using the motion capture.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71512828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-25DOI: 10.1007/s10043-023-00843-7
Yong Fang, Wei Li, Jinye Li, Juntao Hu
With the advantages of a large field of view, portability, and cost-effectiveness, lensless imaging has been applied widely nowadays. However, as a powerful tool for complete polarimetric characterization of microstructural and optical properties of a medium, Mueller matrix imaging has not yet been integrated in lensless imaging scheme. Here we propose a lensless inline polarization holographic system for high-speed and high-resolution Mueller matrix imaging. Liquid crystal variable retarders are introduced to realize high-speed response and avoid vibrations and positioning errors. We apply the blind deconvolution for depolarized imaging reconstruction and the back-propagation approach for polarization hologram reconstruction, respectively. The polarimetric imaging ability and resolution performance of the proposed technique are demonstrated. Furthermore, Mueller matrix images and certain quantitative polarimetric parameters of biological samples are calculated. The proposed method can be easily implemented and integrated in various lensless imaging techniques for on-chip polarimetric imaging.
{"title":"Lensless inline holographic Mueller matrix imaging","authors":"Yong Fang, Wei Li, Jinye Li, Juntao Hu","doi":"10.1007/s10043-023-00843-7","DOIUrl":"10.1007/s10043-023-00843-7","url":null,"abstract":"<div><p>With the advantages of a large field of view, portability, and cost-effectiveness, lensless imaging has been applied widely nowadays. However, as a powerful tool for complete polarimetric characterization of microstructural and optical properties of a medium, Mueller matrix imaging has not yet been integrated in lensless imaging scheme. Here we propose a lensless inline polarization holographic system for high-speed and high-resolution Mueller matrix imaging. Liquid crystal variable retarders are introduced to realize high-speed response and avoid vibrations and positioning errors. We apply the blind deconvolution for depolarized imaging reconstruction and the back-propagation approach for polarization hologram reconstruction, respectively. The polarimetric imaging ability and resolution performance of the proposed technique are demonstrated. Furthermore, Mueller matrix images and certain quantitative polarimetric parameters of biological samples are calculated. The proposed method can be easily implemented and integrated in various lensless imaging techniques for on-chip polarimetric imaging.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}