Analysis of polarization aberrations of the off-axis pupil freeform optical system.

ABSTRACT: Freeform surfaces are widely used in off-axis pupil optical systems with large apertures, wide fields of view, and long focal lengths. Polarization effects in such systems significantly influence imaging quality. We proposed a polarization aberration analysis method for off-axis pupil freeform optical systems. An analytical model of phase aberration, diattenuation, and retardation was established. Low-order Zernike coefficients were analyzed to evaluate the impact on polarization aberration. The analysis results show that off-axis pupil freeform surfaces break the rotational symmetry of polarization aberration. By optimizing the freeform surface in the designed off-axis pupil triple-inverse spatial optical system, diattenuation and retardation decrease by 8.70% and 6.94%, while PSF ellipti

SUBMITTER: Gong C 

PROVIDER: S-EPMC12796757 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature