31 December 2010 Distortion model for star tracker
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Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75445T (2010) https://doi.org/10.1117/12.885223
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China
Abstract
In order to provide the beneficial expression of lens distortion for star trackers, the numerical results of the grid distortions of four typical star tracker lens systems have been investigated, and then data fitting is done with combined multinomial of different number of terms and powers of radial radius. The results indicate that the expression of relative distortion including terms of the one, two, three and four powers of the radial distortion is beneficial in terms of accuracy, and the fitting function with high-order is not quite helpful in providing a more accurate expansion. In order to further validate this distortion model, a star tracker camera calibration approach has been simulated with the data obtained by ray tracing via the Non-Sequential Components of ZEMAX, with imperfect alignment and assembly taken into account. Simulation results also indicate that the four-order of the radial distortion is beneficial.
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Hai-bo Liu, Yi-zhou Tan, Ding-yi Sheng, Jian-kun Yang, Ji-chun Tan, Weng-liang Wang, De-zhi Su, "Distortion model for star tracker", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75445T (31 December 2010); doi: 10.1117/12.885223; https://doi.org/10.1117/12.885223
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