北京时间9月17日晚八点，iCANX Youth Talks第七十三期将隆重开播！本期，我们邀请到了清华大学深圳国际研究生院副教授李星辉、暨南大学研究员张善文、中国科学院长春光学精密机械与物理研究所副研究员于海主讲，河北工业大学教授张宗华，大连理工大学教授蔡引娣担任研讨嘉宾，期待你一起加入这场知识盛宴。
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嘉宾介绍
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李星辉
清华大学
数字光栅先进3D感知
Three-dimensional shape measurement and object pose estimation are in high demand across various fields, where both high precision and high speed are often required. Optical sensing remains the mainstream approach. Taking fringe structured light as an example, digital gratings provide abundant data for image-based digital signal processing. It can be generated using projection systems with high-frequency and high-precision characteristics, and enables flexible spatial phase and frequency modulation of grating patterns. This report discusses how to break through performance bottlenecks from the source of grating formation, starting with programmable high-entropy digital grating technology and encompassing a series of technical pathways, including projector design, robust light field modulation, super-resolution techniques, and comprehensively optimizing structured light fields. Furthermore, in traditionally challenging perception scenarios, including high speed, large-scale measurements, and extreme conditions (e.g., black surfaces, high reflectivity, discontinuities), the deep learning network driven by real data and supervised by physical models significantly improves the performance of 3D perception, greatly expanding potential application areas.
三维形貌测量与物体位姿估计具有广泛的需求，多数场合需要同时兼顾高精度和高速度，光学感知是主流的技术手段。数字光栅以条纹结构光为例，可以通过具有高频和高精度特征的投影系统来获得，灵活地实现光栅图案空间相位调制和空间频率调制，为基于图像感知的数字信号处理提供了丰富的数据。本报告从可编程高信息熵的数字光栅技术入手，通过投影器件设计、鲁棒性的光场调制及超分辨技术，全方位的优化结构光场，从光栅成型的源头突破性能的瓶颈。同时，针对多个在传统方法上极具挑战性的感知领域，高速，大范围，极端条件（黑色，高亮，非连续）等，通过真实数据驱动策略和物理模型监督的深度学习网络，突破了三维感知的性能表现，极大地拓展了潜在应用场景。
Prof. Xinghui LI is the Associate Professor at Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen, China, where he leads the “Optical Precision Nanometrology” Group. Prof. Li received this Ph.D. in Nanomechanics from Tohoku University, Japan (2014), M. S. in Mechatronics Engineering from Xi’an Jiaotong University, China (2011), and B.S. in Mechanical Design, Manufacturing and Its Automation from Wuhan University, China (2008). From 2014, Prof. Li worked as a postdoctoral fellow, Lecturer, Assistant Professor and Associate Professor in current institution. Prof. Li is an innovative scientist with extensive experience on grating interferometry, grating lithography fabrication, spectrum analysis and chromatic sensing, imaging processing and 3D reconstruction. He has published papers in top international journals, including IEEE TIM, MINE, Measurement, Computers in Industry, etc. He has been granted by NSFC, Provincial Key Project, Outstanding Funding from National Postdoctoral Committee, etc. He has been selected to Top 2% scientist (2023 single year), awarded “Highly Cited Award”, “Outstanding Contribution Award” of Journal NMME, etc.
李星辉教授是清华大学深圳国际研究生院副教授，博士生导师，长期从事光学精密纳米测量领域的研究。李教授于2014年获得日本东北大学纳米力学博士学位，2011年获得中国西安交通大学机械电子工程学位，2008年获得中国武汉大学机械设计制造及其自动化学位。2014年以来李教授一直在清华大学深圳国际研究生院工作，先后任博士后研究院，讲师，助理教授和副教授。李教授的研究领域为光载信息，在光学干涉测量、光栅光刻制造、光谱分析与共焦测量、图像处理与数字光栅三维重建等方面拥有丰富的经验。他在国际知名期刊发表多篇论文，包括《Microsystems & Nanoengineering》、《IEEE TIM》、《Computers in Industry》、《Measurement》等。在上述领域获得国家自然科学基金面上项目、广东省基金重点项目、博士后基金特别资助等多项科研资助。2023年度他被评委全球Top2%科学家，曾获得“Highly Cited Award”、NMME期刊突出贡献奖及多个会议的Best Paper Award。
张善文
暨南大学
纹？栅！——光栅工程简介
The important role that gratings play in the advancement of modern technology and industry is enormous and irreplaceable, especially in areas such as spectral analysis, laser engineering, precision displacement measurement, and imaging display. In this report, I will combine my 20 years of experience in grating research, focusing on grating theory design, grating engineering, and grating applications. With my understanding of gratings as the main thread, I will introduce some important but little-known facts through examples, including the boundary between scalar diffraction theory and strict vector diffraction theory, the manufacturing engineering of large-sized and high-precision gratings, and several typical applications of gratings. Through these introductions, I aim to provide the audience with a better understanding of gratings and obtain some different information.
光栅对现代科技和工业进步发挥的重要作用是巨大且不可替代的，尤其是在光谱分析、激光工程、精密位移测量和成像显示等方面。在这次报告中，我将结合自己二十年来从事光栅研究工作的经验，从光栅理论设计、光栅工程和光栅应用等方面，以对自己光栅的理解为主线，通过实例介绍一些重要、但鲜为人知的事实，包括光栅标量衍射理论与严格矢量衍射理论的使用边界，大尺寸、高精度光栅的制造工程，光栅的几种典型应用等，通过这些介绍，旨在使听众对于光栅有更多了解并获得一些不一样的信息。
Dr. Shanwen Zhang, a professor and doctoral supervisor at Jinan University, mainly focuses on the research of diffraction gratings, spectrometers, and AR-HUD devices. For the past twenty years, he has been engaged in diffraction gratings, covering the electromagnetic theory of gratings, manufacturing, and applications. He has successively presided over more than ten national, provincial, and municipal projects, including national equipment development projects and 973 Program projects, with a cumulative research funding of nearly 30 million yuan. Published over 60 academic papers, authorized 20 invention patents, and granted 2 software copyrights. Developing a nano precision large-scale diffraction grating ruling machine, the world's largest size (400mm × 500mm) echelle grating, and an 8000 line/mm grating. The gratings developed by us have been applied to major national scientific research projects such as the lithography machine, Tianwen-1 Mars surface composition detector, and solar telescope. In addition, he also provides grating solutions for several leading companies in analytical instruments.
张善文，暨南大学研究员，博士生导师，主要从事衍射光栅、光谱仪器和AR-HUD成像显示器件等方面的研究工作。二十年来一直从事光栅相关研究，工作内容涵盖光栅电磁场理论设计、光栅制造及其应用。先后主持国家重大科研装备研制项目、973计划项目等国家、院省市地方项目十余项，累计科研经费近3000万元。发表学术论文60余篇，授权发明专利20项，授权软件著作权两项。研制出纳米精度大型衍射光栅刻划机、世界最大尺寸（400mm×500mm）中阶梯光栅和8000线/mm光栅。带领团队研制的光栅应用于光刻机、“天问一号”火星表面成份探测仪和太阳望远镜等重大国家科研项目。此外，还为分析仪器数家龙头企业提供光栅解决方案。
于 海
长春光学精密机械与物理研究所
基于线阵图像识别的光栅位移测量技术研究进展
With the acceleration of global advanced manufacturing technology, there is an urgent need for higher performance absolute grating displacement sensing technology. However, the existing technology is limited by factors such as Moiré fringe noise and the diffraction limit of light waves, and the measurement performance has reached a bottleneck. To overcome existing technological bottlenecks and meet the demand of high-end industries for advanced displacement sensing technology, we propose a displacement measurement technology based on linear-scan image recognition method. Through sub-pixel image-recognition algorithms, high-performance displacement measurement has been achieved on small-sized gratings, with high flexibility, robustness, and fault tolerance. The main research contents include: displacement measurement mechanism based on grating projection recognition, absolute coding recognition method based on single track recognition, high-resolution adaptive subdivision algorithm, and research on anti stain method based on stain recognition. The research on image-based displacement measurement technology will lay the foundation for high-performance and high reliability displacement measurement technology, meeting the development needs of modern high-end manufacturing technology.
随着全球先进制造技术的攻克进程加速，迫切需求更高性能的绝对式光栅位移传感技术。然而现有技术受制于莫尔条纹噪声、光波衍射极限等因素，测量性能已经达到瓶颈。为突破现有技术瓶颈，满足高端工业对先进位移传感技术的渴望，我们提出了基于线阵图像识别方法的位移测量技术。通过亚像素级图像识别算法，在小尺寸光栅上实现了高性能位移测量，并且具有较高的灵活性、鲁棒性、容错性。主要研究内容包括：基于光栅投影识别的位移测量机理，基于单码道识别的绝对式编码识别方法，高分辨力自适应细分算法，基于污渍识别的抗污渍方法研究。图像式位移测量技术的研究将为高性能、高可靠性的位移测量技术奠定基础，满足现代高端制造技术的发展需求。
Yu Hai (1987-), Ph.D. in Engineering, Associate Researcher, and Doctoral Supervisor. In 2014, he graduated from Daheng College, Chinese Academy of Sciences, majoring in mechanical and electronic engineering, and received a doctor's degree in engineering. Since 2014, he has worked in Changchun Institute of Optics, Precision Mechanics and Physics, Chinese Academy of Sciences. Mainly engaged in the research of photoelectric displacement precision measurement technology. As the project leader, he had presided over the National Natural Science Foundation Youth Science Fund, National Natural Science Foundation General Project, Jilin Provincial Department of Science and Technology Excellent Youth Training Program Project, Jilin Provincial Science and Technology Development Plan Key R&D Project, Jilin Provincial Natural Science Foundation General Project, etc. In 2020, he was selected into the "Dawn Talent Training Plan" of Chunguang Institute, President of Chinese Academy of Sciences, in 2022, he was selected as a member of the Youth Innovation Promotion Association of the Chinese Academy of Sciences, and in 2023, he was selected as a high-level D talent in Jilin Province. Based on previous research, more than 50 academic papers have been published (including 18 first author papers in journals such as IEEE-TIE and IEEE-TIM), and 15 invention patents have been authorized as the first inventor.
于海（1987-），工学博士，副研究员，博士生导师。2014 年毕业于中国科学院大学大珩学院机械电子工程专业，获工学博士学位。2014 年至今工作于中国科学院长春光学精密机械与物理研究所。主要从事光电位移精密测量技术的研究。作为项目负责人主持了国家自然科学基金青年科学基金、国家自然科学基金面上项目、吉林省科技厅优秀青年培养计划项目、吉林省科技发展计划重点研发项目、吉林省自然科学基金面上项目等。2020 年入选中国科学院长春光机所“曙光人才培养计划”，2022 年入选中国科学院青年创新促进会会员，2023年被评选为吉林省高层次D类人才。结合前期研究，发表学术论文50余篇（含IEEE-TIE，IEEE-TIM等期刊第一作者论文18篇），以第一发明人获授权发明专利15项。
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主持人
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李星辉
清华大学
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研讨嘉宾
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张宗华
河北工业大学
蔡引娣
大连理工大学
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