Effects of structured surface errors on MTF of off-axis TMA system

Xuefeng Zeng; Feng Yan; Xuejun Zhang

doi:10.1117/12.970630

16 October 2012 Effects of structured surface errors on MTF of off-axis TMA system

Xuefeng Zeng, Feng Yan, Xuejun Zhang

Proceedings Volume 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 84161B (2012) https://doi.org/10.1117/12.970630
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

Off-axis three-mirror anastigmatic (TMA) system adopt off-axis aspheric mirror for high resolution telescope. However, residual tooling marks from advanced aspheric fabrication techniques such as computer controlled optical surfacing (CCOS) are difficult to remove. These marks typically in the mid-spatial frequency (MSF), in optical fabrication also named surface band error. MSF will reduce MTF and contrast. This paper using Fourier method to research the relationship between MSF and the reduction, and applies simulation method to analyze the effect of fabrication residual marks on the loss of MTF in off-axis TMA optical system, also analyze the scatter influence of MSF by plot the relationship between surface errors PV/RMS and spot diameter.

Citation Download Citation

Xuefeng Zeng, Feng Yan, and Xuejun Zhang "Effects of structured surface errors on MTF of off-axis TMA system", Proc. SPIE 8416, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 84161B (16 October 2012); https://doi.org/10.1117/12.970630

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