Two-step phase extraction method and system based on inclined phase shift error correction and medium
A phase shifting error and phase extraction technology, which is applied in the direction of instruments, using optical devices to transmit sensing components, measuring devices, etc., can solve the problems of inapplicable modulation amplitude disturbance and random tilt phase shifting errors, and achieve fast phase extraction speed, high precision effect
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[0063] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0064] Specifically, such as figure 1 As shown, the present invention provides a two-step phase extraction method based on tilt phase shift error correction, including:
[0065] Step S1, collecting two random interferograms;
[0066] Step S2, removing the background light intensity of the two random interferograms by high-pass filtering;
[0067] Step S3, performing normalization processing on the filtered two random interferograms to remove modulation amplitude disturbances of the two random interferograms;
[0068] Step S4, for the two random interferograms after the normalization process, solve the random tilt phase shift error parameter between the two random interferograms by minimizing the nonlinear error;
[0069] Step S5, extracting the phase based on the random tilt phase shift error parameter between the ...
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