Phase stitching and error correction in aperture synthesis for generalized phase-shifting interferometry.

Area of Science:

• Optical Engineering
• Interferometry
• Wavefront Reconstruction

Background:

• Phase distribution is critical for accurate wavefront reconstruction in interferometry.
• Aperture synthesis requires precise alignment and phase correction of sub-apertures.

Purpose of the Study:

• To develop an accurate aperture synthesis method for generalized phase-shifting interferometry.
• To improve the quality of reconstructed object wavefronts by stitching phase and amplitude.

Main Methods:

• Utilizing double correlations to determine relative locations of sub-wavefronts.
• Implementing phase correction to align and combine phase distributions of sub-wavefronts.
• Stitching both real amplitude and phase of the object wave on the recording plane.

Main Results:

• Successfully stitched both real amplitudes and phases of complex amplitudes.
• Achieved perfect combination of sub-wavefront phase distributions through phase correction.
• Demonstrated improved quality of the reconstructed object image via optical experiments.

Conclusions:

• The proposed aperture synthesis method effectively stitches phase and amplitude for enhanced wavefront reconstruction.
• This technique significantly improves the fidelity and quality of reconstructed object images in interferometry.
• Validated through experimental results, the method offers a robust solution for advanced optical imaging.