Optical Review最新文献_第10页

Gesture recognition using deep-learning in single-pixel-imaging with high-frame-rate display with latent random dot patterns 在单像素成像中使用深度学习进行手势识别，高帧频显示潜在随机点模式

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-12-11 DOI: 10.1007/s10043-023-00848-2

Hiroki Takatsuka, Masaki Yasugi, S. Suyama, Hirotsugu Yamamoto

引用次数: 0

Study on pressure angle optimization for cam curve of continuous zoom system based on the particle swarm optimization 基于粒子群优化的连续变焦系统凸轮曲线压力角优化研究

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-11-21 DOI: 10.1007/s10043-023-00847-3

Hao Li, Haihong Chen, Junpan Chen, Yaqiong Zhang, Yan Piao

{"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":"29 47","pages":""},"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}

引用次数: 0

Design of graded-index-type photonic crystal fiber with uniform air hole diameter and its application to collimator for single-mode photonic crystal fiber 均匀孔径渐变折射率型光子晶体光纤的设计及其在单模光子晶体光纤准直器中的应用

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-11-07 DOI: 10.1007/s10043-023-00842-8

Daichi Yoshihara, Hirohisa Yokota, Yoh Imai

{"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":"30 6","pages":"617 - 625"},"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}

引用次数: 0

Analysis of floating distance of arc 3D display with respect to inclination angle of substrate 弧形3D显示器的浮动距离与基板倾角的关系分析

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-11-07 DOI: 10.1007/s10043-023-00841-9

Hiroto Oishi, Kengo Fujii, Masaki Yasugi, Shiro Suyama, Hirotsugu Yamamoto

引用次数: 0

Reducing thickness of long-distance aerial display system in AIRR using Fresnel lens 利用菲涅耳透镜减薄AIRR中的远程航空显示系统

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-11-03 DOI: 10.1007/s10043-023-00845-5

Shinya Sakane, Shiro Suyama, Hirotsugu Yamamoto

{"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":"30 6","pages":"657 - 663"},"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}

引用次数: 0

Detection of soybean mildew infection at early stage based on optical coherence tomography and deep learning methods 基于光学相干断层扫描和深度学习方法的大豆霉菌感染早期检测

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-11-02 DOI: 10.1007/s10043-023-00846-4

Yijian Liang, Yang Zhou

{"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":"30 6","pages":"626 - 636"},"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}

引用次数: 0

Method of acquiring shapes using motion capture of aerial images formed by large acrylic panels 使用大型丙烯酸面板形成的航空图像的运动捕捉来获取形状的方法

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-10-31 DOI: 10.1007/s10043-023-00844-6

Mayu Adachi, Masaki Yasugi, Shiro Suyama, Hirotsugu Yamamoto

引用次数: 0

Lensless inline holographic Mueller matrix imaging 无透镜在线全息米勒矩阵成像

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-10-25 DOI: 10.1007/s10043-023-00843-7

Yong Fang, Wei Li, Jinye Li, Juntao Hu

引用次数: 0

Two-wavelength digital holography using frequency-modulated continuous-wave technique for multiplexing in the time–frequency domain 利用调频连续波技术实现时频域复用的双波长数字全息术

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-10-05 DOI: 10.1007/s10043-023-00840-w

Hikaru Hamada, Masayuki Yokota

{"title":"Two-wavelength digital holography using frequency-modulated continuous-wave technique for multiplexing in the time–frequency domain","authors":"Hikaru Hamada, Masayuki Yokota","doi":"10.1007/s10043-023-00840-w","DOIUrl":"10.1007/s10043-023-00840-w","url":null,"abstract":"<div><p>In this study, we have proposed a digital holographic technique in which the frequency-modulated continuous-wave technique is introduced as a novel implementation of wavelength multiplexing in the time–frequency domain. In the proposed technique, the holograms are recorded with two wavelengths and the information of each hologram can be separated in the time–frequency domain by modulating the frequencies of two laser diodes at different modulation widths. Therefore, a temporal Fourier analysis is performed on each pixel of the time-series holograms whose intensity is modulated with two beat frequencies. And then, the holograms corresponding to the two wavelengths are extracted independently. Initially, a holographic system with two close wavelengths of 782.43 nm and 782.50 nm was designed to measure the surface profile of metallic gauge blocks with a known step-height of 1.16 mm in both experimental and numerical calculations. In addition, the measurement accuracy of the proposed system was investigated using both the experimental and the numerical results. Furthermore, the numerical calculation was conducted to investigate the origin of the periodic noise superimposed on the experimental results. Finally, the reduction method of the periodic noise was proposed, and the effect of the method was demonstrated using numerical calculations.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":"30 6","pages":"595 - 605"},"PeriodicalIF":1.2,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71492234","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}

引用次数: 0

Research on coherent tracking technology based on signal beam nutation 基于信号波束章动的相干跟踪技术研究

IF 1.2 4区物理与天体物理

Optical Review Pub Date : 2023-09-27 DOI: 10.1007/s10043-023-00829-5

Jingying Bian, Bin Ren, Qian Lu, Xiaoqi Liu, Le Zhang, Xuejiao Zhang

引用次数: 0