Correction of the error induced by obscurations of Ritchey-Chretien collimators for high-resolution space camera MTF measured with the ISO 12233 slanted-edge method
| Autor: | Kewei E, Liu Kai, Baoli Yao, Tao Wang, Liu Shangkuo, Zhaohui Li |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Mathematical model business.industry Collimator 02 engineering and technology Function (mathematics) Edge (geometry) 021001 nanoscience & nanotechnology Space (mathematics) 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Optics law Optical transfer function 0103 physical sciences Electrical and Electronic Engineering 0210 nano-technology business Secondary mirror Zemax |
| Zdroj: | Optik. 235:166653 |
| ISSN: | 0030-4026 |
| Popis: | We propose a method to correct the error induced by the obscurations of Ritchey-Chretien (R-C) collimators, when measuring modulation transfer function (MTF) of high-resolution space cameras by the ISO 12,233 slanted-edge method. The obscurations of an R-C collimator include the secondary mirror (SM) and its supporting bars. Mathematical models are derived to simulate possible obscurations by virtual surfaces of Zemax, with which we get the correction function (CF) of the obscuration induced error (OIE). Simulated results manifest that the proposed method can correct the OIE. Furthermore, an experiment setup is established with the same system parameters of the previous Zemax modeled system. The experiment results verify the effectiveness of the proposed method again. Our method can guarantee the precision of the ISO 12,233 slanted-edge method when an R-C collimator is chosen. |
| Databáze: | OpenAIRE |
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