教授、博士生导师
专业: 光学工程、光学
研究方向: 光学精密检测、光学仪器及设计
Email: lidahai@scu.edu.cn, 1009461940@qq.com
地址: 成都市一环路南一段24号四川大学电子信息学院
邮编：610065
招生方向：光学工程（学术硕博）、电子信息（光学工程专硕、工程博士）
学习与工作简历
1993年毕业于西南大学物理系获学士学位，1996年毕业于电子科技大学获光学硕士学位，2002年在四川大学获光学博士学位。2003年聘为四川大学副教授，2008年聘为教授，2010.9.-2011.9.在美国亚利桑那大学光学中心做访问学者，现为四川省学术和技术带头人后备人选。
科研项目与获奖
长期从事波前检测技术研究、光电仪器设计与开发方面的工作。现主持国家自然基金区域创新发展联合基金重点项目1项、国家自然科学基金面上项目1项，深入开展位相测量偏折术的研究与应用，涉及大口径光学元件面形在线/在位高精度高分辨检测方法与相关技术研究、以及高速流场的三维流动显示技术研究相关等工作。
曾主持国家自然科学基金、国家“863”高技术发展计划项目、科技部“973”子课题，四川省科技支撑计划项目、成都市科技计划项目、四川省应用基础研究项目、中国工程物理研究院、成都飞机工业（集团）有限责任公司和交通部公路科学研究所等合作研究项目，总经费逾千万。作为主要研究人员参与解放军总装备部武器装备预研项目、国家“863”高技术发展计划项目、参与科技部国家重大专项和国家自然科学基金重大项目等。
获教育部技术发明二等奖1项、四川省科技进步二等奖1项、成都市科技进步二等奖1项、中国工程物理研究院预研基金二等奖1项，获“四川省海外高层次留学人才”称号，“四川大学唐立新教学名师”奖、多次获得“四川大学青年骨干教师”称号。
人才培养
为本科生讲授“应用光学”、“光学测量技术实验”等课程；为硕士研究生讲授“工程光学”、“电子信息前沿”等课程。为博士生研究生讲授“像差理论及光学检测”、“工程光学导论”等课程。已培养博士6人，硕士60余人，主要就职于高校、科研院所及国内相关知名公司企业，从事精密测量、光学镜头设计、检测仪器设计与开发、应用软件开发等工作，部分推荐至国际知名大学相关专业攻读博士学位。当前实验室师资在职博后1人，在读博士生4人，硕士生9人，本科生3人。
实验室经费充足，科研设备齐全，包括高精度干涉仪、相机、计算服务器、光学平台及配套装置若干，光机设计及加工条件具备。实验室氛围和谐，科研用电脑配备完善，欢迎各位同学报考。
论文、专著与专利
发表学术论文100余篇，SCI、EI收录多篇。第一发明人获授权发明专利多项，并主编“现代工程光学”教材一本。
一、代表论文：
[1] Zekun Zhang, Ruiyang Wang, Xinwei Zhang, Renhao Ge, Wanxing Zheng, Manwei Chen, and Dahai Li, "Refractive index measurement deflectometry for measuring gradient refractive index lens," Opt. Express 32(7), 12620 (2024).
[2] Z. Yan, Dahai Li, Xinwei Zhang, and Renhao Ge, "Phase measuring deflectometry for convex aspheric surface measurement," Appl. Opt. 63(6), 1583 (2024).
[3] Ruiyang Wang, Dahai Li, Wanxing Zheng, L. Yu, Renhao Ge, and Xinwei Zhang, "Vision ray model based stereo deflectometry for the measurement of the specular surface," Optics and Lasers in Engineering 172, 107831 (2024).
[4] Xinwei Zhang, Dahai Li, Zekun Zhang, B. Huang, Ruiyang Wang, H. Pu, Z. Huang, and Z. Chen, "Density field measurement deflectometry for supersonic wind tunnels," Opt. Lett. 48(7), 1714 (2023).
[5] Xinwei Zhang, Dahai Li, and Ruiyang Wang, "Screen-monitored stitching deflectometry based on binocular stereo vision," Measurement 207, 112440 (2023).
[6] Wanxing Zheng, Dahai Li, Ruiyang Wang, Xinwei Zhang, Renhao Ge, L. Yu, and W. Zhao, "Parasitic reflection separation deflectometry based on harmonic analysis," Measurement 203, 111864 (2022).
[7] Wanxing Zheng, Dahai Li, Ruiyang Wang, Xinwei Zhang, Renhao Ge, and L. Yu, "Front and back surface measurement of the transparent planar element based on multi-frequency fringe deflectometry," Opt. Express 30(20), 35409 (2022).
[8] L. Yu, Dahai Li, Y. Ruan, Xinwei Zhang, Ruiyang Wang, and K. Xu, "Wavefront Aberration Measurement Deflectometry for Imaging Lens Tests," Applied Sciences 12(15), 7857 (2022).
[9] Renhao Ge, Dahai Li, Xinwei Zhang, Ruiyang Wang, Wanxing Zheng, L. Yu, X. Li, and W. Zhao, "Phase measuring deflectometry based on calibration of the entrance pupil center of the camera lens," Appl. Opt. 61(5), 1156 (2022).
[10] Xinwei Zhang, Dahai Li, and Ruiyang Wang, "Active speckle deflectometry based on 3D digital image correlation," Opt. Express 29(18), 28427 (2021).
[11] Ruiyang Wang, Xinwei Zhang, and Dahai Li, "Dynamic speckle deflectometry based on backward digital image correlation," Measurement 171, 108860 (2021).
[12] Ruiyang Wang, Dahai Li, and Xinwei Zhang, "Systematic error control for deflectometry with iterative reconstruction," Measurement 168, 108393 (2021).
[13] Ruiyang Wang, Dahai Li, Xinwei Zhang, Wanxing Zheng, L. Yu, and Renhao Ge, "Marker-free stitching deflectometry for three-dimensional measurement of the specular surface," Opt. Express 29(25), 41851 (2021).
[14] Tiexin Hong, Dahai Li, Ruiyang Wang, Xinwei Zhang, and Xiaoxiao Liu, Method for measuring the radius of mean curvature of a spherical surface based on phase measuring deflectometry[J]. Applied Optics, 2021, 60(6): 1705-1709.
[15] Peng Luo, Dahai Li, Ruiyang Wang, Xinwei Zhang, Xiaowei Li, and Wuxiang Zhao. Phase-extraction algorithm for a single-shot spatial-carrier orthogonal fringe pattern with least squares method[J]. Optical Engineering, 2020, 59(2): 024103.
[16] Ruiyang Wang, Xinwei Zhang, and Dahai Li. Dynamic speckle deflectometry based on backward digital image correlation[J]. Measurement, 2021, 171: 108860.
[17] Ruiyang Wang, Dahai Li, and Xinwei Zhang. Systematic error control for deflectometry with iterative reconstruction[J]. Measurement, 2021, 168: 108393.
[18] Xinwei Zhang, Dahai Li, Ruiyang Wang, Haichao Tang, Peng Luo, and Kaiyuan Xu. Speckle pattern shifting deflectometry based on digital image correlation[J]. Optics express, 2019, 27(18): 25395-25409.
[19] Lei Tang, Dahai Li, Ruiyang Wang, Wuxiang Zhao, and Jiangang Zhao. Normalized quadrature four-frame phase shift algorithm based on crossed fringe patterns[J]. Optical Engineering, 2019, 58(3): 035103.
[20] Ruiyang Wang, Dahai Li, Kaiyuan Xu, Xinwei Zhang, and Peng Luo. Parasitic reflection elimination using binary pattern in phase measuring deflectometry[J]. Optics Communications, 2019, 451: 67-73.
[21] Ruiyang Wang, Dahai Li, Lei Li, Kaiyuan Xu, Lei Tang, Pengyu Chen and Qionghua Wang. Surface shape measurement of transparent planar elements with phase measuring deflectometry[J]. Optical Engineering, 2018, 57(10): 104104.
[22] Pengyu Chen, Dahai Li, Qionghua Wang, Lei Li , Kaiyuan Xu, Jiangang Zhao, and Ruiyang Wan. A method of sub-aperture slope stitching for testing flat element based on phase measuring deflectometry[J]. Optics and Lasers in Engineering, 2018, 110: 392-400.
[23] Chengying Jin, Dahai Li, Kewei E, Mengyang Li, Pengyu Chen, Ruiyang Wang, and Zhao Xiong. Phase extraction based on iterative algorithm using five-frame crossed fringes in phase measuring deflectometry[J]. Optics and Lasers in Engineering, 2018, 105: 93-100.
[24] Mengyang Li, Dahai Li, Chengying Jin, Kewei E, Xiaodong Yuan, Zhao Xiong, and Qionghua Wang. Improved zonal integration method for high accurate surface reconstruction in quantitative deflectometry[J]. Applied optics, 2017, 56(13): F144-F151.
[25] Kewei E, Dahai Li, Lijie Yang, Guangrao Guo, Mengyang Li, Xuemin Wang, Tao Zhang, and Zhao Xiong. Novel method for high accuracy figure measurement of optical flat[J]. Optics and Lasers in Engineering, 2017, 88: 162-166.
[26] Guangrao Guo, Dahai Li, Kewei E, Mengyang Li, and Haiping Chen. Stitching error calculation method for the slope data on a square subaperture[J]. Optics Communications, 2016, 380: 124-133.
[27] Kewei E, Dahai Li, Chen Zhang,Tao Zhang, Mengyang Li, Qin Wang, Chengying Jin, and Zhao Xiong. Four-step shear method for the absolute measurement of a flat surface based on phase measuring deflectometry[J]. Applied optics, 2016, 55(30): 8419-8425.
[28] Kewei E, Chen Zhang, Mengyang Li, Zhao Xiong, and Dahai Li. Wavefront reconstruction algorithm based on Legendre polynomials for radial shearing interferometry over a square area and error analysis[J]. Optics express, 2015, 23(16): 20267-20279.
[29] Mengyang Li, Dahai Li, Chen Zhang, Kewei E, Qionghua Wang, and Haiping Chen. Modal wavefront reconstruction from slope measurements for rectangular apertures[J]. JOSA A, 2015, 32(11): 1916-1921.
[30] Shuiyan Li, Shuang Qin, Dahai Li, and Qionghua Wang. Using a laser source to measure the refractive index of glass beads and Debye theory analysis[J]. Applied optics, 2015, 54(33): 9688-9694.
[31] Chen Zhang, Dahai Li, Mengyang Li, Kewei E, and Guangrao Guo. A calibration method of self-referencing interferometry based on maximum likelihood estimation[C]. Optical Measurement Systems for Industrial Inspection IX. International Society for Optics and Photonics, 2015, 9525: 95250X.
[32] Dahai Li, Xiao-Ping Qi, Qionghua Wang, Xiaoyong Liu, Guoying Feng, Shouhuan Zhou, Accurate retrieval algorithm of amplitude from radial-shearing interferogram[J]. Optics Letters, 2010.9.15, 35(18): 3054~3056.
[33] Dahai Li, Fulin Wen, Qionghua Wang, Yunying Zhao, Fuming Li, Bingfang Bao, Improved formula of wavefront reconstruction from a radial shearing interferogram[J]. Optics Letters, 2008.2.1, 33(3): 210~212.
[34] 李大海, 王瑞阳, 张新伟. 基于位相测量偏折术的高精度检测平面光学元件面形的方法[J]. 应用光学, 2020, 41(4): 844.
[35] 赵建岗, 李大海, 李磊, 陈鹏宇, 王瑞阳, 王琼华. 偏折术中相机和被测面坐标的获取[J]. 中国激光, 2019, 46(3): 0304001.
[36] 汤海潮, 李大海, 李磊, 陈鹏宇，王瑞阳，王琼华. 基于数字图像相关的平面物体面形散斑图形偏折术[J]. 光学学报, 2019, 39(2): 0212006.
[37] 李萌阳，李大海, 赵霁文,章辰，王琼华. 基于方形域内标准正交矢量多项式的波前重建[J]. 光学学报, 2014, 34(7): 0712007.
二、部分发明专利：
[1] 李大海; 汤海潮; 张新伟; 鄂可伟; 唐蕾;王琼华. 一种散斑偏折术检测平面元件面形的方法与装置.专利号: ZL201810200779.X
[2] 李大海; 陈鹏宇; 王瑞阳; 郭广饶; 鄂可伟; 刘鑫. 一种斜率拼接检测平面元件面形的方法与装置.专利号: ZL201810200195.2
[3] 李大海; 鄂可伟; 王琴; 章涛. 大口径平面光学元件的子孔径拼接检测技术研究. 专利号: ZL201611222160.6
[4] 李大海; 李萌阳; 洪之涵; 鄂可伟.一种基于逆哈特曼原理的透镜波前像差测量方法. 专利号: ZL201510332083.9
[5] 李大海; 郭东华; 薄健康. 一种测量高折射率玻璃微珠折射率的装置及方法，专利号: ZL201110052161.1
三、教材：
主编“现代工程光学”教材，科学出版社出版，2013，北京。
学术成果
提出的采用二次彩虹法测量高折射率玻璃微珠折射率的方法，形成了交通部的行业标准，测量范围为1.5~2.4，测量精度可达0.004，并与交通部公路科学研究所合作研制开发了 “BWZY-1玻璃珠性能测试仪”，已为多家单位提供测量服务。提出了基于视线标定方法的大口径离轴非球面面形高精度检测的关键技术，精度和干涉仪相近，可用于不同尺寸球面、非球面、自由曲面、透明平面元件等的面形在位高精度检测；完成了高速流场密度的在线定量和动态测量，光学镜头的轴上与轴外点波像差检测，镜头结构参数测量，以及对大口径倍频晶体不同倾斜角度下前后表面面形的在位测量，精度达到波长量级水平，上述方法与技术已在推广应用。
学术任职
中国光学学会会员、中国光学学会光电技术专业委员会委员、中国光学学会光学教育专业委员会委员、中国光学学会全息与光信息专业委员会委员。
实验室成员
