元镜头数字图像相关技术
メタレンズデジタル画像相関
메타렌즈 디지털 이미지 상관관계
Correlación de imágenes digitales con meta-lente
Corrélation d'images numériques avec métalame
Металинзовая цифровая корреляция изображений
Zhou Zhao ¹, Xiaoyuan Liu ², Yu Ji ¹, Yukun Zhang ¹, Yong Chen ¹, Zhendong Luo ³, Yuzhou Song ⁴, Zihan Geng ⁴, Takuo Tanaka ⁵ ⁶ ⁷, Fei Qi ¹, Shengxian Shi ¹, Mu Ku Chen ² ³
¹ School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
中国 上海 上海交通大学机械与动力工程学院
² The State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, Hong Kong 999077, China
中国 香港 香港城市大学太赫兹及毫米波全国重点实验室
³ Department of Electrical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China
中国 香港 香港城市大学电气工程系
⁴ Ministry Institute of Data and Information, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518071, China
中国 深圳 清华大学深圳国际研究生院 数据与信息研究院
⁵ Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics, Saitama 351-0198, Japan
⁶ Metamaterial Laboratory, RIKEN Cluster for Pioneering Research, Saitama 351-0198, Japan
⁷ Institute of Post-LED Photonics, Tokushima University, Tokushima 770-8506, Japan
With the same level of measurement accuracy, more portable and miniaturized measurement systems will have greater advantages, providing users with more flexible and convenient measurement solutions. Here, we introduce a new type of digital image correlation (DIC) system that incorporates a binocular meta-lens, featuring a simple and compact configuration.
Meta-lens is one of the promising flat optical imaging devices that are ultra-thin, customizable, and well-suited for use in confined spaces. We evaluated this binocular meta-lens based DIC(BM-DIC) system through classic in-plane and out-of-plane translation tests, followed by a bending test on a helicopter wing model to capture 3D displacement and deformation fields. For in-plane translations, the system achieved high precision with a standard deviation (σ) below 2 µm. Despite a small baseline of 4 mm, the system maintained a σ of approximately 32 µm for out-of-plane translations.
Comparative analysis with conventional dual-camera stereo DIC systems showed that the BM-DIC system maintains an acceptable relative error margin of about 1% in measured strain fields despite a 75-fold reduction in baseline length. This research demonstrates the integration of DIC techniques with advanced meta-lens technology, indicating substantial potential to enhance the capabilities of DIC technology in experimental solid mechanics.
