Equalization and hole location modeling for large scale non-planar focal plane

Shengliang Gu; Feifan Zhang; Hongzhuan Hu; Zengxiang Zhou; Jianping Wang

doi:10.1117/12.2561303

13 December 2020 Equalization and hole location modeling for large scale non-planar focal plane

Shengliang Gu, Feifan Zhang, Hongzhuan Hu, Zengxiang Zhou, Jianping Wang

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114516M (2020) https://doi.org/10.1117/12.2561303
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The focal plane of the multi-object spectral survey telescope is non-planar. It is difficult to achieve the specified number of equalization. For the positioning holes of the fiber positioning unit arranged on the large-scale focal plane, a large position error is often generated. This error will directly affect the receiving energy efficiency of focal plane fiber. In this paper, the zoom sub-region centre projection method is adopted, and MATLAB is used to conduct modelling and error analysis on the central points position of the focal plane hole group, to build optimized zoom projection function, and to output three-dimensional coordinate data of the hole group. In general, this method can rationalize the hole position error distribution at different positions on the focal plane and improve the hole position accuracy significantly. The threedimensional coordinate data of the centre points of the hole group can also be used for CNC machining of the focal plane in the later stage.

Citation Download Citation

Shengliang Gu, Feifan Zhang, Hongzhuan Hu, Zengxiang Zhou, and Jianping Wang "Equalization and hole location modeling for large scale non-planar focal plane", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114516M (13 December 2020); https://doi.org/10.1117/12.2561303

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