Removal Method of Core Shaft of Primary Mirror

Abstract:

The structure of core shaft combined with mercury belt is widely used as the primary mirror supporting structure of 1 meter class and 2 meter class large aperture telescope currently. In order to reduce the structure jitter of primary mirror, the fitting clearance between core shaft and shaft sleeve is very small, so clamping stagnation occurs during installation and disassembling process of core shaft. The removal method of clamping stagnation of core shaft is introduced. Mechanical analysis of core shaft and primary mirror is applied to make sure that the primary mirror is safe. Some tools are designed specially, and the process and the attention points to remove core shaft are introduced. In this way, the clamping stagnation of core shaft can be removed easily. The core shaft of 1 m class primary mirror was removed by the method and the primary mirror was excellent without damage.

• Periodical: Key Engineering Materials (Volume 552)
• Pages: 221-226
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.552.221
• Online since: May 2013
• Authors: Qi Rui Xu, Fan Wu
• Keywords: Alignment, Core Shaft, Primary Mirror, Telescope

References

[1] Pierre Y. Bely. The Design and Construction of Large Optical Telescope. Spinger

[2] Su Shufeng. Finite Element Analysis of the characteristics of the large telescope, The Institute of Optics and Electronics, the Chinese Academy of Sciences dissertation, (2006)

[3] Li Fu, Ruan Ping, Zhao Baochang. Research of Normal Gravity Plane Mirror Deformation [J]. Photon Lecture, (2005)

[4] Feng Shulong, Zhang Xin, Weng Zhicheng, Cong Xiaojie, Large Diameter Flat Back Shaped Primary Mirror Support Mode Selection, Optical Technology,( 2004)

[5] Ye Lu, Wang Zhaoxun, Large Diameter Long Focal Length Collimator Primary Mirror Support and Adjustment Mechanism, Optics and Precision Engineering, (2005)