Preliminary design of moment correction system for large optical components

Hongchao Zhao; Fei Yang; Peng Guo; Qichang An; Haibo Jiang; Jingxu Zhang

doi:10.1117/12.2507338

11 January 2019 Preliminary design of moment correction system for large optical components

Hongchao Zhao, Fei Yang, Peng Guo, Qichang An, Haibo Jiang, Jingxu Zhang

Proceedings Volume 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 108370Q (2019) https://doi.org/10.1117/12.2507338
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Warping Harness is a mechanism which can periodically correct the low order surface errors of mirror. The main correction objects are the residual error of the mirror machining, the stress distortion caused by the coating, the surface error caused by the temperature load, even with the errors caused by the gravity change, and so on. In principle, the zero moment point of the Whiffletree structure can be adjusted by changing the deflection of the warping harness blade. Due to the closed force system, once the moment induced by the warping harness changes, the load distribution on the whiffletree structure varies too. In practice, the structure of Warping Harness is installed on each group of Whiffletree joints and works with the structure of Whiffletree. The servo stepping motor is employed to control the bending of the spring blade to change the distribution of the support force, and then the correction of the main mirror surface figure is completed. This paper mainly introduces the correction principle of Warping harness and its principle, and demonstrates the preliminary design of the system.

Citation Download Citation

Hongchao Zhao, Fei Yang, Peng Guo, Qichang An, Haibo Jiang, and Jingxu Zhang "Preliminary design of moment correction system for large optical components", Proc. SPIE 10837, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 108370Q (11 January 2019); https://doi.org/10.1117/12.2507338

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