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파면 분석을 위한 편광 격자 기반 층밀림 간섭계

Lateral Shearing Interferometry based on a Polarization Grating for Wavefront Sensing

Journal of the Korean Society for Precision Engineering 2022;39(4):245-251.
Published online: April 1, 2022

1 조선대학교 광기술공학과

1 Department of Photonic Engineering, Chosun University

#E-mail: knjoo@chosun.ac.kr, TEL: +82-62-230-7235
• Received: January 11, 2022   • Revised: February 11, 2022   • Accepted: February 15, 2022

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Optical Performance Using the Surface Form Error Modeling based on A Monte-Carlos Simulation of An Optical Window
    Kwang-Woo Park, Ji-Hun Bae, Chi-Yeon Kim
    Journal of the Korean Society for Precision Engineering.2024; 41(9): 725.     CrossRef

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Lateral Shearing Interferometry based on a Polarization Grating for Wavefront Sensing
J. Korean Soc. Precis. Eng.. 2022;39(4):245-251.   Published online April 1, 2022
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Lateral Shearing Interferometry based on a Polarization Grating for Wavefront Sensing
J. Korean Soc. Precis. Eng.. 2022;39(4):245-251.   Published online April 1, 2022
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Lateral Shearing Interferometry based on a Polarization Grating for Wavefront Sensing
Image Image Image Image Image Image Image Image Image
Fig. 1 Laterally sheared wavefronts to obtain the interference corresponding to the slope of the original wavefront
Fig. 2 (a) The structure of the polarization grating, and (b) Polarization and diffraction characteristics of the transmitted light by the polarization grating for the incident light with the linear polarization
Fig. 3 Optical configuration of the lateral shearing interferometry based on a polarization grating (PG-LSI); BE: Beam expander; BPF: Band-Pass filter; P: Polarizer; L: Lens; BS: Beam splitter; OL: Objective lens; S: Specimen; TL: Tube lens; PG: Polarization grating; M: Flat mirror; PCMOS: Polarization-Pixelated CMOS camera
Fig. 4 Principle of laterally sheared wavefronts based on a polarization grating
Fig. 5 Photograph of lateral shearing interferometry based on a polarization grating; BE: Beam expander; BPF: Band-Pass filter; P45: 45o Rotated polarizer; L: Lens; BS: Beam splitter; OL: 2x Objective lens; TL: Tube lens; PG: Polarization grating; M: Flat mirror; PCMOS: Polarization-pixelated CMOS camera; WFS: Shack-Hartmann wavefront sensor
Fig. 6 4 Phase- shifted interferograms and phase maps along (a) x-axis, (b) y-axis, and (c) The reconstructed wavefront
Fig. 7 Measurement results of piezoelectric deformable mirror by (a) Lateral shearing interferometry based on a polarization grating, and (b) Shack- Hartmann wavefront sensor
Fig. 8 Radius of curvature of piezoelectric deformable mirror defocus
Fig. 9 Measurement result of an arbitrary wavefront of a piezoelectric deformable mirror
Lateral Shearing Interferometry based on a Polarization Grating for Wavefront Sensing

Summary of concave mirror measurement results

Designed radius of
curvature [mm]
Form Talysurf S5K
result [mm]
PG-LSI result [mm]
38 37.98 38.51
100 100.08 101.52
300 301.89 303.08
400 398.68 397.27
Table 1 Summary of concave mirror measurement results