Abstract

This Letter communicates a new, to the best of our knowledge, designing framework of shearography. The three elementary functional parts of quantitative shearography, namely imaging, shearing, and phase shifting, are integrated into a single diffractive optical element (DOE), named a 3-in-1 phase mask. The idea breaks through the conventional designing routine of shearography, and converts it from the combination of individual optical elements to the spatial manipulation of phase. The slicing, splicing, and alternating strategy is proposed to generate the 3-in-1 phase mask from a given number of sequenced Fresnel lenses and a modified echelle grating. The operating component is merely a DOE, which renders the optics naturally coaxial. The delivered shearography system enjoys a super-compact configuration, a high level of robustness and stability, and the potential for implementing outside optics laboratories. Crucial system parameters, e.g., shear amount, shear direction, working distance, can be readily shifted on call by re-making the 3-in-1 phase mask. The future of the present idea is in its shape and seems promising with lithography, micromachining, and metasurfaces.

© 2022 Optica Publishing Group

Liquid-crystal-polymer binary diffractive optical elements with a sub-micrometer feature size realized by a contact polarization holography

Qipeng Fang, Jinbo Liu, Zhanjun Yan, Qiling Deng, Hui Pang, Yongmo Lv, Xiuhui Sun, Jianjun Chen, Haibo Jiang, and Shaoyun Yin
Opt. Lett. 47(13) 3195-3198 (2022)

Versatile digital micromirror device-based method for the recording of multilevel optical diffractive elements in photosensitive chalcogenide layers (AMTIR-1)

Alexandre Joerg, Mael Vignaux, and Julien Lumeau
Opt. Lett. 41(15) 3415-3418 (2016)

Improved phase-shifting method for pinhole point diffraction interferometer based on a precise driving of the substrate

Jiasheng Lu, Bing Li, Zhuo Zhao, and Leqi Geng
Opt. Lett. 47(19) 4877-4880 (2022)

Multi-illumination 3D holographic display using a binary mask

Youngjin Jo, Dongheon Yoo, Dukho Lee, Minkwan Kim, and Byoungho Lee
Opt. Lett. 47(10) 2482-2485 (2022)

Transmission matrix-based phase correction for optical systems

Kaige Liu, Hengkang Zhang, Zeqi Liu, Bin Zhang, Xing Fu, and Qiang Liu
Opt. Lett. 47(19) 5216-5219 (2022)