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Applied Optics|May 13, 2021
Verification of phase measurement error sources in phase-shifting interferometry with four step phase-shifting algorithmsIl-Jun Pak, Chol-Su Kim, Jong-Chol Kang, et al.
Ultrasonics|February 16, 2015
Study on the vibration displacement distribution of a circular ultrasonic motor statorChol-Su Ri, Myong-Jin Kim, Chol-Su Kim, et al.
Applied Optics|April 1, 2020
Evaluation method for the optical feedback factor and linewidth enhancement factor using phase discontinuities in self-mixing interferometry signalsChol-Yong Ri, Chol-Su Kim, Guk-Chol Ri, et al.
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