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

Jones, Katherine J.

doi:10.1117/12.726880

Cited by 1 publication

(3 citation statements)

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“…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).…”

Section: Discussionmentioning

confidence: 97%

“…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.…”

Section: Discussionmentioning

confidence: 99%

“…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.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive wavelets applied to phase-shifting interferometry for wavefront sensing

Jones¹

2008

SPIE Proceedings

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Optical interferometry, especially the lateral Shearing interferometer, has long played a role in wavefront sensing. Phase-Shifting Interferometry and also Self-Referencing Interferometry have significant advantages over the Shack-Hartmann wavefront sensor. Phase difference between two interfering beams is determined by measuring the intensity while the phase difference between the two interfering beams is changed in a known manner three times. The phase difference can then be determined in the presence of aberration. Adaptive wavelets will be applied to Phase-Shifting Interferometry in order to address both noise and coherence and increase the depth of fringes. Phase is determined by means of wavelet ridge extraction which will increase the depth of interference fringes and improve resolution. kjj ones

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%