Surface error correction of a Keck 10-m telescope primary mirror segment by ion figuring

1992 ◽  
Author(s):  
Lynn N. Allen ◽  
Robert E. Keim ◽  
Timothy S. Lewis ◽  
James R. Ullom
Keyword(s):  
Error Correction ◽  
Surface Error ◽  
Primary Mirror

Tooth surface error correction of hypoid gears machined by duplex helical method

2021 ◽  
Author(s):  
Shun-xing Wu ◽  
Hong-zhi Yan ◽  
Zhi-yong Wang ◽  
Ren-gui Bi ◽  
Zhi Chen ◽  
...  
Keyword(s):  
Error Correction ◽  
Tooth Surface ◽  
Surface Error ◽  
Hypoid Gears

The Surface Error Analysis of Theodolite Primary Mirror Considering Contact Boundary Condition

2014 ◽  
Vol 43 (12) ◽  
pp. 1212004
Author(s):  
谢军 XIE Jun ◽  
曹立华 CAO Li-hua ◽  
韩光宇 HAN Guang-yu ◽  
乔健 QIAO Jian ◽  
刘永明 LIU Yong-ming ◽  
...  
Keyword(s):  
Boundary Condition ◽  
Error Analysis ◽  
Contact Boundary ◽  
Surface Error ◽  
Primary Mirror

scholarly journals Precision Analysis and Error Compensation of a Telescope Truss Structure Based on Robotics

2020 ◽  
Vol 10 (18) ◽  
pp. 6424
Author(s):  
Rui Wang ◽  
Fuguo Wang ◽  
Yuyan Cao ◽  
Honghao Wang ◽  
Xueqian Sun ◽  
...  
Keyword(s):  
Engineering Application ◽  
High Order ◽  
Wavefront Aberration ◽  
Mirror Surface ◽  
Sensitivity Matrix ◽  
Support Structure ◽  
Inverse Kinematic Problem ◽  
Surface Error ◽  
Primary Mirror ◽  
Secondary Mirror

We propose a new secondary mirror support structure assisted by multi-robotics to improve the observation performance of vehicle-mobile telescope systems. A mathematical model of the displacement at the end of the robotic and the variation of telescope pitch angle is established, then the posture of the robotic is optimized by the Jacobian matrix iteration inverse kinematic problem method. Based on the new support structure, a high-order sensitivity matrix is proposed to establish the mapping relationship between the robotic misalignment and the Zernike coefficient, with the accuracy verified via the Monte Carlo method. The method of adjusting the secondary mirror to compensate the aberration caused by the primary mirror is proposed, and the relationship between the primary mirror surface error and the system error is established under different pitch angles before and after compensation. The experiment and simulation results showed that the adjustment calculated by the high-order sensitivity matrix method can effectively compensate for the misalignment caused by the robotics and the primary mirror surface error to a certain degree. After multiple iterations, the root mean square of the wavefront aberration was better than λ/15. This conclusion provides an engineering application reference value for the secondary mirror support and aberration correction technology of the vehicle telescope system.

Final surface error correction of an off-axis aspheric petal by ion figuring

1992 ◽  
Author(s):  
Lynn N. Allen ◽  
John J. Hannon ◽  
Richard W. Wambach, Jr.
Keyword(s):  
Error Correction ◽  
Surface Error ◽  
Final Surface
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