Scientists from the Jiamiao Yang team at Shanghai Jiao Tong University, in collaboration with the State Key Laboratory of Dynamic Optical Imaging and Measurement, have developed disturbance-introduced interferometry, a new surface topography metrology method that turns unavoidable mechanical disturbances into useful phase-shifting excitation. Together with a natural phase decoding algorithm, the method reconstructs nanometer-level surface shapes without active phase shifters or strict vibration isolation. It offers a practical route to high-precision interferometric measurement in large-aperture optics testing and vibration-prone manufacturing environments.Turning Vibration Into Phase Shift for Surface Metrology
September 22, 2026
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Scientists from the Jiamiao Yang team at Shanghai Jiao Tong University, in collaboration with the State Key Laboratory of Dynamic Optical Imaging and Measurement, have developed disturbance-introduced interferometry, a new surface topography metrology method that turns unavoidable mechanical disturbances into useful phase-shifting excitation. Together with a natural phase decoding algorithm, the method reconstructs nanometer-level surface shapes without active phase shifters or strict vibration isolation. It offers a practical route to high-precision interferometric measurement in large-aperture optics testing and vibration-prone manufacturing environments.
