| Citation: | MA Shi-jie, WU Hong-bo, ZHAO Shang-nan, WU Qing, ZHANG Xin. Polarization aberration analysis of catadioptric anamorphic optical systems and its effect on the point spread function[J]. Chinese Optics. doi: 10.37188/CO.2024-0010
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The anamorphic optical system is a relatively special optical system with bi-planar symmetry, whose structure gives rise to non-rotationally symmetric polarization aberrations. This thesis constructs a foldback anamorphic optical system. It also systematically analyzes the polarization aberration of this system and its effect on the point spread function, with the aim of providing a reference for the design of subsequent anamorphic optical systems.
Simulations of a folded-reversal anamorphic optical system based on a three-dimensional polarized light trace were performed to obtain detailed data on the polarization aberration and to compute the two-way attenuation and phase delay distribution characteristics of individual surfaces, as well as the Jones pupil, the amplitude response matrix, the point spread function, and the polarization crosstalk contrast of the system.
The maximum two-way attenuation is 0.145, and the maximum phase delay is 1.46×10−2 rad, both occurring at the secondary mirror position. The amplitude response function of the optical system with a 2∶1 anamorphic ratio has a 40.6% difference between the polarization crosstalk term in the long and short focal end directions, and the polarization crosstalk is limited by an order of magnitude of 10-6 for this anamorphic optical system contrast.
Polarization aberration in high-precision anamorphic optical systems is not negligible. The effects of polarization aberration can be reduced by film layer design and folded-back structure. The conclusions of this study can serve as a reference for designing anamorphic optical systems in deep space exploration and coherent communication systems.
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