Phase conjugate distortion correction for astronomical adaptive optics based on wavelet ridge extraction

Adaptive wavelets applied to phase-shifting interferometry for wavefront sensing

“…In order to address both noise and coherence and increase depth of interference fringes, wavelet time-frequency analysis is introduced. Examples are presented as well as experimental results (4,5,6,23,24). Wavelet ridge extraction readily achieves instantaneous phase increment plus is more robust and with noise immunity (24).…”

“…Wavelet-based Time-frequency Analysis is introduced with examples from signal processing and interferometry (4,5,6,23,24). Wavelet-based phase determination readily achieves the instantaneous phase increment provided the signal frequency does not change too abruptly and the instantaneous frequency measured along the ridge is close to the signal frequency.…”

“…Wavelet Phase Determination and Adaptive Wavelet Distortion Correction' (4,5,6). Adaptive wavelets will applied to Phase-Shifting Interferometry to address both noise and coherence and increase the depth of interference fringes.…”

Application of adaptive wavelets for laser beam distortion compensation for astronomical adaptive optics

“…The numerical bottleneck (4) is expected to be processing hundreds of channels of information. What is being developed here is a simpler system for wavefront sensing and phase conjugate distortion correction: adaptive wavelet-based Adaptive Optics (8,9,10).…”