Abstract

The in-plane electronic speckle pattern interferometry (ESPI), implemented in a Michelson stellar interferometer-like configuration, offers high sensitivity and dynamic measurement. However, its limited angle of view (AOV) remains a major challenge for the rotation angle determination of multiple objects. In this Letter, we analyze the main factors that influence the AOV of the in-plane ESPI and propose an “image transmitting” approach to enlarge the AOV. With the aid of a folded dual-telescope imaging system, we develop an AOV-unlimited interferometer that can determine multi-object rotation angles in real time. The practicability of the interferometer is demonstrated by the application in real-time measuring of the rotation angles of the disks within a 2D granular system.

© 2023 Optica Publishing Group

Non-phase unwrapping interferometric approach for a real-time in-plane rotation measurement

Min Lu, Shengjia Wang, Laura Aulbach, Martin Jakobi, and Alexander W. Koch
Opt. Lett. 42(10) 1986-1989 (2017)

Efficient ESPI method to identify vibration characteristics of transparent films

Yinhang Ma, Hanyang Jiang, Hao Cheng, Minyang Wu, Xiaoyuan He, and Fujun Yang
Opt. Lett. 46(20) 5145-5148 (2021)

Multi-mode fiber-based speckle contrast optical spectroscopy: analysis of speckle statistics

Chen-Hao P. Lin, Inema Orukari, Christopher Tracy, Lisa Kobayashi Frisk, Manish Verma, Sumana Chetia, Turgut Durduran, Jason W. Trobaugh, and Joseph P. Culver
Opt. Lett. 48(6) 1427-1430 (2023)

Multi-target object scattering imaging with intensity correlation of structured illumination

Jingjing Zhang, Zhuhe Jing, Shupeng Zhao, Xiao Wang, Guangdong Ma, Yunlong Wang, Yongtao Zhao, Ruifeng Liu, and Fuli Li
Opt. Lett. 48(6) 1486-1489 (2023)

Accurate dynamic 3D deformation measurement based on the synchronous multiplexing of polarization and speckle metrology

Yijun Du, Junxiang Li, Hong Zhao, Zixin Zhao, Chen Fan, Menghang Zhou, Xingyu Yang, and Rong Zhao
Opt. Lett. 48(9) 2329-2332 (2023)