ITM Web Conf.
Volume 45, 20222021 3rd International Conference on Computer Science Communication and Network Security (CSCNS2021)
|Number of page(s)||9|
|Section||Computer Technology and System Design|
|Published online||19 May 2022|
Analysis of polarization characteristics of freeform surface optical system
Changchun University of Science and Technology, State Key Laboratory of Applied Optics, National and Local Joint Engineering Research Center for Space Optoelectronics Technology, Changchun 130022, China
2 Changchun University of Science and Technology, College of Optoelectronic Engineering, Changchun 130022, China
* Corresponding author: email@example.com
Freeform surfaces are widely used in off-axis optical systems with large aperture, large field of view, and long focal length. The polarization effect caused by the non-rotationally symmetrical shape has an impact on the system’s polarization imaging quality and measurement accuracy. Based on Jones’ notation, this paper proposes a polarization aberration analysis method for fringed Zernike polynomial freeform optical systems and constructs a full-field polarisation aberration analysis model of non-rotationally symmetric freeform reflective optical systems. The light propagation vector k is added on the basis of the two-dimensional ray tracing algorithm. By tracing the full-field polarized light of the off-axis optical system in the field of view, the Jones pupil diagram is obtained. The phase aberration, diattenuation and retardance are separated by Pauli decomposition and SVD decomposition. The off-axis freeform surface optical system is designed. The analysis results show that the phase aberration of the off-axis freeform surface optical system is directly related to the surface shape of the freeform surface. The changes of the freeform surface to the diattenuation and retardance are both 56% of the diattenuation and retardance of the sistem. For deep-space telescopes and lithography systems, it is of great significance for improving system accuracy to master this change.
Key words: Polarization aberration / Jones matrix / Freeform surface / Polarization ray tracing
© The Authors, published by EDP Sciences, 2022
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