Analysis of power spectral density as a performance metric for TMT M3

Fei Yang; Qi-Chang An; Fu-Guo Wang; Xiang-Yi Liu

doi:10.1117/12.2069400

18 September 2014 Analysis of power spectral density as a performance metric for TMT M3

Fei Yang, Qi-Chang An, Fu-Guo Wang, Xiang-Yi Liu

Proceedings Volume 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 92820C (2014) https://doi.org/10.1117/12.2069400
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

We investigate a new metric power spectral density (PSD),for characterizing the performance of seeing-limited large telescope such as thirty meter telescope(TMT ). As the PSD is directly related to the performance of the atmosphere which plays an important role in ground based facilities, it represents the efficiency lose due to mid and high-spatial frequency components in observing time. The metric also properly counts for the optic error of the mirror itself such as the deviations from a perfect surface, and metrology measurement errors .The metric can multiply all the errors which differentiates from the traditional ones, such as RMS. We also numerically confirm this feature for Karman model atmosphere error multiplied with the sample of our vendor and the TMT M3.Additonaly, we discuss other pertinent feature of the PSD, including its relationship to Zernike aberration ,and RMS of wave front errors.

Citation Download Citation

Fei Yang, Qi-Chang An, Fu-Guo Wang, and Xiang-Yi Liu "Analysis of power spectral density as a performance metric for TMT M3", Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 92820C (18 September 2014); https://doi.org/10.1117/12.2069400

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