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International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference最新文献

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End-to-end single-shot composite fringe projection profilometry based on deep learning 基于深度学习的端到端单镜头复合条纹投影轮廓术
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2021-01-15 DOI: 10.1117/12.2587728
Yixuan Li, Jiaming Qian, Shijie Feng, Qian Chen, C. Zuo
{"title":"End-to-end single-shot composite fringe projection profilometry based on deep learning","authors":"Yixuan Li, Jiaming Qian, Shijie Feng, Qian Chen, C. Zuo","doi":"10.1117/12.2587728","DOIUrl":"https://doi.org/10.1117/12.2587728","url":null,"abstract":"Using a single fringe image to complete the dynamic absolute 3D reconstruction has become a tremendous challenge and an eternal pursuit for researchers. In fringe projection profilometry (FPP), although many methods can achieve high-precision 3D reconstruction from simple system architecture via appropriate encoding ways, they usually cannot retrieve the absolute 3D information of objects with complex surfaces through only a single fringe pattern. In this work, we develop a single-frame composite fringe encoding approach and use a deep convolutional neural network to retrieve the absolute phase of the object from this composite pattern end to- end. The proposed method can directly obtain spectrum-aliasing-free phase information and robust phase unwrapping from single-frame compound input through extensive data learning. Experiments have demonstrated that the proposed deep-learning-based approach can achieve absolute phase retrieval using a single image.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126244792","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}
引用次数: 1
Eccentric fiber Bragg gratings via radiation of femtosecond laser pulses 飞秒激光脉冲辐射下的偏心光纤布拉格光栅
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2021-01-15 DOI: 10.1117/12.2585033
Rui Zhang, Qiang Xu, P. Jiang, Lei Cao, Ya-ni Zhang, Kang Li, N. Copner
{"title":"Eccentric fiber Bragg gratings via radiation of femtosecond laser pulses","authors":"Rui Zhang, Qiang Xu, P. Jiang, Lei Cao, Ya-ni Zhang, Kang Li, N. Copner","doi":"10.1117/12.2585033","DOIUrl":"https://doi.org/10.1117/12.2585033","url":null,"abstract":"Eccentric fiber Bragg gratings (EFGBs) in standard single-mode optical fiber by using point-by-point direct writing technique with 800 nm femtosecond laser. The experimental results show that the transmission spectrum amplitude is coupled by Bragg and cladding mode resonance over a wide spectrum range. Meanwhile, the spectral characteristics of EFBGs were studied by adjusting grating period, grating length, laser power and eccentric distance. The eccentric distance is the most essential parameter in terms of inscribing gratings. It can break up the original structural symmetry of the fiber by changing the offset of grating in the fiber core. This change will bring great opportunities and breakthroughs to the application of EFGBs.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125528664","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}
引用次数: 0
Testing of annular hyperboloid mirror for Cassegrain system 卡塞格伦系统环形双曲面反射镜的测试
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2021-01-15 DOI: 10.1117/12.2585089
Sanfeng Hao, Jian Zhang, F. An, Jianfeng Yang
{"title":"Testing of annular hyperboloid mirror for Cassegrain system","authors":"Sanfeng Hao, Jian Zhang, F. An, Jianfeng Yang","doi":"10.1117/12.2585089","DOIUrl":"https://doi.org/10.1117/12.2585089","url":null,"abstract":"This paper introduces the testing of annular hyperboloid mirror with 460mm diameter in the Cassegrain system. To improve the testing efficiency and meet the requirements of utilization, the study is carried out from three stages: precision grinding, precision polishing, and optical coating. In the precision grinding stage, the annular Zernike polynomial is used to fit the measured surface combining with the data measured from the coordinate measuring machine, so that it can facilitate the testing of the distribution of the surface shape deviation over the entire surface. During the precision polishing stage, a feasible Offner compensator is designed to achieve the goal of high-precision testing of the hyperboloid surface, with a measurement accuracy of RMS≤0.02λ. Also, 0.5-0.7μm and 3-5μm dual-band high reflectivity and high uniformity reflective coating is designed for the Cassegrain system requirements, the actual test reflectivity is 96.2%, which can meet the design requirements.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125787027","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}
引用次数: 0
Generation of cylindrical vector vortex beams based on common-path vector optical generators 基于共程矢量光发生器的圆柱矢量涡旋光束的产生
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2021-01-15 DOI: 10.1117/12.2586807
Jin Xia, M. Hu, Pei Zhang
{"title":"Generation of cylindrical vector vortex beams based on common-path vector optical generators","authors":"Jin Xia, M. Hu, Pei Zhang","doi":"10.1117/12.2586807","DOIUrl":"https://doi.org/10.1117/12.2586807","url":null,"abstract":"This paper proposes a flexible and stable method to generate cylindrical vector vortex beams with different topological charges using Single-polarization Vector Optical Generators (VOG). VOG is composed of two single-polarization responsive cylindrical lenses placed oppositely at a certain distance, which is a convenient implementation of the coherent superposition by means of two orthogonally circularly polarized states instead of path interference of interferometer. In this experiment, the customized computer generated holograms are loaded on the spatial light modulator(SLM) to generate Laguerre Gaussian (LG) beams with arbitrary topological charge, and LG beams convent to vector vortex beams with corresponding topological charge through VOG. The interference pattern of the two beams projected to a linear polarization state also give the cylindrically symmetric petal beams. And the diameters of vector vortex beams with different topological charges are also measured.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114934597","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}
引用次数: 0
Imaging human skin morphology with polarization parameters indirect microscopic method 用偏振参数间接显微法成像人体皮肤形态
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-30 DOI: 10.1117/12.2519917
Guoyan Liu, Duzun Cao, Jincai Zhao, Yongmei Wei
{"title":"Imaging human skin morphology with polarization parameters indirect microscopic method","authors":"Guoyan Liu, Duzun Cao, Jincai Zhao, Yongmei Wei","doi":"10.1117/12.2519917","DOIUrl":"https://doi.org/10.1117/12.2519917","url":null,"abstract":"In recent years, optical detection technology for human skin has developed rapidly. This paper introduces a novel imaging technique, polarization parameters indirect microscopic imaging. We insert polarization-modulation mechanics into a conventional reflection microscopic imaging system. Instead of normal light source, we use a high transmission infrared light source. The resolution of such optical microscopy can reach to 100 nanometers. Using this imaging system, we can obtain multiple optical vector parameters such as polarization phase, degree of polarizations ,wave vector phrase, spatial angles, angles and modulation etc. By analyzing the polarization parameters, we obtain inversion images of human skin.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133303729","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}
引用次数: 0
Design of high-accuracy corner cube retroreflector array 高精度角立方后向反射器阵列设计
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI: 10.1117/12.2522043
Jie Liu, Shangmin Lin, Hu Wang, Yang Liu, Yaoke Xue, Meiying Liu, Yongjie Xie, Fan Bu
{"title":"Design of high-accuracy corner cube retroreflector array","authors":"Jie Liu, Shangmin Lin, Hu Wang, Yang Liu, Yaoke Xue, Meiying Liu, Yongjie Xie, Fan Bu","doi":"10.1117/12.2522043","DOIUrl":"https://doi.org/10.1117/12.2522043","url":null,"abstract":"The retroreflector array consists of multiple cubic corner reflectors, and is used as a cooperative target for space attitude measurement. The position and normal direction of each cubic corner reflector directly affect the measurement accuracy. From the point of view of structural design, a series of practical precision extraction methods are put forward based on machining accuracy in this paper. After the verification of some experiments, the accuracy of the method can be controlled within 5', and the position accuracy is better than 0.05mm.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121247144","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}
引用次数: 1
Metal surface detection using division-of-focal-plane imaging polarimetry 用焦平面分割成像偏振法检测金属表面
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI: 10.1117/12.2522015
Hui Wang, Haofeng Hu, Xiaobo Li, Lin Zhao, Zijian Guan, Xiangying Kong, Tiegen Liu
{"title":"Metal surface detection using division-of-focal-plane imaging polarimetry","authors":"Hui Wang, Haofeng Hu, Xiaobo Li, Lin Zhao, Zijian Guan, Xiangying Kong, Tiegen Liu","doi":"10.1117/12.2522015","DOIUrl":"https://doi.org/10.1117/12.2522015","url":null,"abstract":"Imaging polarimetry has emerged over the past decades as a powerful tool to reveal the information invisible in intensity image. This paper aims at the application of division of focal plane (DoFP) imaging polarimetry in metal surface inspection. We obtain the intensity image and polarimetric image of some metal components on which there are defects, including scratch, wear, crack and burr. Experiment shows that polarimetric imaging can reduce the effect of strong reflection and improve the defect/surface contrast. The polarimetric image is more effective for metal surface inspection than the traditional intensity image.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127179465","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}
引用次数: 1
Wavelength tuning of type-II “W” quantum well of interband cascade laser 带间级联激光器ii型“W”量子阱波长调谐
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI: 10.1117/12.2521757
Yi Zhang, Fu-Hui Shao, Chengao Yang, Shengwen Xie, Shu-Shan Huang, Ye Yuan, Jin-ming Shang, Yu Zhang, Ying-qiang Xu, H. Ni, Z. Niu
{"title":"Wavelength tuning of type-II “W” quantum well of interband cascade laser","authors":"Yi Zhang, Fu-Hui Shao, Chengao Yang, Shengwen Xie, Shu-Shan Huang, Ye Yuan, Jin-ming Shang, Yu Zhang, Ying-qiang Xu, H. Ni, Z. Niu","doi":"10.1117/12.2521757","DOIUrl":"https://doi.org/10.1117/12.2521757","url":null,"abstract":"We report the wavelength tuning of type-II “W” quantum well of interband cascade laser. By changing the thickness of the InAs electron well, the wavelength of the active region is adjusted. We found that the whole 3-4 μm spectra can be realized and the intensity was basically the same by measuring the photoluminescence (PL) of the active region. It showed that the type-II “W” quantum well of interband cascade laser can achieve 3-4 μm range without attenuation. In addition, we calculated the wavelength of quantum well of different InAs thickness by the 8-band k·p method. And we found that the wavelength of the active region varies with the thickness of the InAs electron well, which is consistent with the theory. In addition, the measured wavelength was different from the theoretical wavelength, which may be due to the As incorporation. The incorporation of As into the InGaSb layer will lead to blue shift in the wavelength.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125513530","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}
引用次数: 1
Nanosecond level passively Q-switched Ti:Sapphire laser using MoS2 as a saturable absorber 以二硫化钼为可饱和吸收体的纳秒级被动调q钛蓝宝石激光器
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI: 10.1117/12.2521960
Zhe Sun, Guangying Li, Huang Liu, G. Cheng
{"title":"Nanosecond level passively Q-switched Ti:Sapphire laser using MoS2 as a saturable absorber","authors":"Zhe Sun, Guangying Li, Huang Liu, G. Cheng","doi":"10.1117/12.2521960","DOIUrl":"https://doi.org/10.1117/12.2521960","url":null,"abstract":"A molybdenum disulfide (MoS2) saturable absorber (SA) solution is fabricated by liquid-phase exfoliation (LPE) method. By using the MoS2-SA solution, a compact diode-pumped passively Q-switched Ti:Sapphire laser has been demonstrated. The minimum short pulse width is 3.7 ns and the maximum pulse energy is 16.2 μJ at 1 kHz repetition rate. Our results show that MoS2-SA solution can be developed as an effective saturable absorber to achieve nanosecond pulse laser in the infrared range.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114419106","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}
引用次数: 0
The calculation and realization of the visibility between patches of complex 3D scene based on super-computation 基于超计算的复杂三维场景补丁间可见性的计算与实现
International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference Pub Date : 2019-01-24 DOI: 10.1117/12.2522438
Jihu Zhang, Ligang Li, Yuhao Zhang, Changmao Wu, Zhengwei Xu, Wei Ni, Chenyang Li
{"title":"The calculation and realization of the visibility between patches of complex 3D scene based on super-computation","authors":"Jihu Zhang, Ligang Li, Yuhao Zhang, Changmao Wu, Zhengwei Xu, Wei Ni, Chenyang Li","doi":"10.1117/12.2522438","DOIUrl":"https://doi.org/10.1117/12.2522438","url":null,"abstract":"The visibility of calculation between patches in complex 3D scene can reflect the occlusion relationship between patches, which is the premise of calculating the radiation effect between patches due to self-emission or light reflection. In the 3D light field of remote sensing scene radiation distribution calculation, full chain optical imaging refinement simulation and other fields have a wide range of applications. At present, there are some problems in the study of the visibility of calculation between patches in complex scenes. Firstly, existing visibility of calculation method based on viewpoints of perspective is easy to miss some visible areas. Secondly, the number of patches in complex remote sensing 3D scene reaches tens of thousands or even millions, the computational complexity of visibility of calculation between patches reaches O(N2), and the existing serial calculation method is time-consuming and difficult to apply. Therefore, this paper carries out the study of the visibility of calculation and efficiency optimization between patches in complex 3D scenes based on super-calculation. A new method for calculating the visibility between patches based on hemispherical uniform random sampling is proposed. The correctness of the algorithm is analyzed theoretically. The visibility of parallel computing model is designed according to the proposed algorithm and experiments is verified on the super computer. The experimental results show that for the 3D application scene of millions of magnitude, compared with the traditional visibility of serial processing strategy, the parallel processing of 512 nodes of the super-calculation platform \"Tianhe II\" can achieve an acceleration ratio of nearly 500, which improves calculation efficiency significantly.","PeriodicalId":370739,"journal":{"name":"International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129755960","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}
引用次数: 0
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