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Superimposed multi-harmonic interference frequency and phase measurements based on non-synchronous sampling quantization and all-phase spectrum correction
L Chang, J Gao, F Zhuang, Y Yu, Y Wang - Measurement, 2024 - Elsevier
As a non-destructive detection technique for measuring parallel transparent optics,
wavelength-shifting interferometry provides a separation basis for multiple measured …
wavelength-shifting interferometry provides a separation basis for multiple measured …
Multi-parameter reconstruction of interference harmonics by effective tuning combination selection and sampling boundary fitting
L Chang, Q Shen, J Gao, Y Cao, J Min, Y Yu - Optics & Laser Technology, 2025 - Elsevier
To efficiently and accurately realize four-surface measurements with flexible cavity lengths
and sampling frequencies, a wavelength-tuning phase-shifting matching algorithm based on …
and sampling frequencies, a wavelength-tuning phase-shifting matching algorithm based on …
Wavefronts reconstruction of transparent flats by redividing the detectable folded interference harmonics
L Chang, Y Zhou, Y Yu - Optics and Lasers in Engineering, 2023 - Elsevier
The difficulty in multi-surface measurements comes from that each measured surface
contributes harmonics to the fringe patterns, and the wavelength-shifting technique is an …
contributes harmonics to the fringe patterns, and the wavelength-shifting technique is an …
Multi-surface phase-shifting algorithm using the window function fitted by the nonlinear least squares method
L Chang, S Valyukh, T He, Z Chen… - Journal of Modern Optics, 2022 - Taylor & Francis
A multi-surface phase demodulation algorithm is proposed to measure surfaces of the
transparent plate simultaneously. A non-linear least-squares method based on the trust …
transparent plate simultaneously. A non-linear least-squares method based on the trust …
High-resolution optical coherence tomography using gapped spectrum and real-valued iterative adaptive approach
Y Bai, S Cai, S ** using the Fabry–Perot cavity as a reference with compensation for nonlinear optical frequency scanning
Z Deng, Z Liu, S Gu, X Jia, W Deng - Optics Communications, 2020 - Elsevier
High-precision measurements of the surface depth map represent a challenging task in
many industrial sectors. In this study, we present a simple frequency scanning interferometry …
many industrial sectors. In this study, we present a simple frequency scanning interferometry …
Demodulation of interferometry parameters with multiple-harmonic superposition based on the DTFT and semi-blind spectral analysis
L Chang, J Gao, Y Wang, Y Zhou, Y Yu - Measurement, 2024 - Elsevier
The core issue of multi-surface wavelength-shifting interferometry at free cavity lengths is
mainly centered on adaptively matching the tuning step. To avoid harmonic aliasing and …
mainly centered on adaptively matching the tuning step. To avoid harmonic aliasing and …