Problems on polarization aberrations in large aperture dynamic interferometry based on the polarization phase...

Area of Science:

• Optical Engineering
• Metrology
• Materials Science

Background:

• Polarization-based phase shifting is effective for dynamic measurements.
• Birefringence in large optics introduces polarization aberrations, limiting interferometric accuracy.
• These aberrations are constant and independent of phase shifting.

Purpose of the Study:

• To analyze the mechanism of polarization aberrations in large optics.
• To propose and validate a novel interferometric method for measuring birefringence effects.
• To correct polarization aberrations in large aperture measurements.

Main Methods:

• Theoretical analysis of polarization aberration mechanisms.
• Interferometric measurement of transmitted wavefronts with orthogonal polarization states.
• Calibration of polarization aberrations using determined birefringence distribution.

Main Results:

• A method to determine birefringence by measuring transmitted wavefronts was developed.
• Theoretical analysis confirmed polarization error correction using two orthogonal polarization states.
• The proposed method successfully calibrated polarization aberrations on a large aperture platform.

Conclusions:

• The new interferometric method effectively determines birefringence in large optics.
• Accurate correction of polarization aberrations enhances dynamic measurement reliability.
• The technique offers a viable solution for metrology challenges with large optical components.