Analysis of target wavefront error for secondary mirror of a spaceborne telescope

2014 ◽  
Author(s):  
Shenq-Tsong Chang ◽  
Wei-Cheng Lin ◽  
Ching-Hsiang Kuo ◽  
Chia-Yen Chan ◽  
Yu-Chuan Lin ◽  
...  
Keyword(s):  
Secondary Mirror ◽  
Wavefront Error

scholarly journals Optimal F-Number of Ritchey–Chrétien Telescope Based on Tolerance Analysis of Mirror Components

2020 ◽  
Vol 10 (15) ◽  
pp. 5038
Author(s):  
Sheng-Feng Lin ◽  
Cheng-Huan Chen ◽  
Yi-Kai Huang
Keyword(s):  
System Parameter ◽  
Tolerance Analysis ◽  
Alignment Error ◽  
Mean Square ◽  
Random Surface ◽  
Secondary Mirror ◽  
Optical Module ◽  
Wavefront Error ◽  
Allowable Range ◽  
In The Beginning

The Ritchey–Chrétien telescope has been the key optical module for remote sensing instruments (RSI), in which the root mean square (RMS) random surface wavefront error and the alignment error of the primary and the secondary mirror takes the highest weighting in the tolerance analysis for the fabrication and assembly of the telescope. Therefore, the higher tolerance of those items becomes preferable for higher efficiency of RSI manufacturing. In this paper, the correlation between those tolerance items and the f-number of the telescope has been investigated. Although the f-number is normally a system parameter well specified in the beginning of the design process, it is not very rigid in practice and has a certain amount of allowable range. The optimal f-number can then be chosen based on the consideration of those key tolerance items. The proposed concept can be generalized as a novel methodology of design for tolerance.

Large-aperture deformable mirror correction of tiled-grating wavefront error

2006 ◽  
Vol 133 ◽  
pp. 645-648 ◽  
Author(s):  
B. E. Kruschwitz ◽  
R. Jungquist ◽  
J. Qiao ◽  
S. Abbey ◽  
S. E. Dean ◽  
...  
Keyword(s):  
Deformable Mirror ◽  
Large Aperture ◽  
Wavefront Error

Correcting for Spherical Aberrations in Solid Immersion Microscopy Using a Deformable Mirror

2011 ◽  
Author(s):  
Y. Lu ◽  
E. Ramsay ◽  
C. Stockbridge ◽  
F. H. Koklu ◽  
A. Yurt ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Error Correction ◽  
Deformable Mirror ◽  
Wafer Thickness ◽  
Wavefront Error ◽  
Substrate Wafer ◽  
Thickness Error

Abstract We present a method for correcting spherical aberrations in solid immersion microscopy through the use of a deformable mirror. Aberrations in solid immersion imaging for failure analysis can be induced through off-axis imaging, errors in lens fabrication or mismatch of design and substrate wafer thickness. RMS wavefront error correction of 30% is demonstrated in the case of substrate wafer thickness error.

Optical engineering requirements for the LISA wavefront error budget

1998 ◽  
Author(s):  
Martin Caldwell ◽  
Paul McNamara ◽  
Anna Glennmar
Keyword(s):  
Error Budget ◽  
Optical Engineering ◽  
Wavefront Error

Design and preliminary tests of the VLT secondary mirror unit

1997 ◽  
Author(s):  
Stefano Stanghellini ◽  
Emmanuel Manil ◽  
M. Schmid ◽  
Karl H. Dost
Keyword(s):  
Secondary Mirror

Thermal performance of the ATST secondary mirror

2007 ◽  
Author(s):  
Myung K. Cho ◽  
Joe DeVries ◽  
Eric Hansen
Keyword(s):  
Thermal Performance ◽  
Secondary Mirror

scholarly journals Optimization of Virtual Shack-Hartmann Wavefront Sensing

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4698
Author(s):  
Xian Yue ◽  
Yaliang Yang ◽  
Fei Xiao ◽  
Hao Dai ◽  
Chao Geng ◽  
...  
Keyword(s):  
Optimization Methods ◽  
Wavefront Sensing ◽  
Noise Performance ◽  
Zero Padding ◽  
Ocular Aberrations ◽  
Processing Procedure ◽  
Wavefront Error ◽  
Before And After ◽  
Calculation Algorithms ◽  
Normal Human

Virtual Shack–Hartmann wavefront sensing (vSHWS) can flexibly adjust parameters to meet different requirements without changing the system, and it is a promising means for aberration measurement. However, how to optimize its parameters to achieve the best performance is rarely discussed. In this work, the data processing procedure and methods of vSHWS were demonstrated by using a set of normal human ocular aberrations as an example. The shapes (round and square) of a virtual lenslet, the zero-padding of the sub-aperture electric field, sub-aperture number, as well as the sequences (before and after diffraction calculation), algorithms, and interval of data interpolation, were analyzed to find the optimal configuration. The effect of the above optimizations on its anti-noise performance was also studied. The Zernike coefficient errors and the root mean square of the wavefront error between the reconstructed and preset wavefronts were used for performance evaluation. The performance of the optimized vSHWS could be significantly improved compared to that of a non-optimized one, which was also verified with 20 sets of clinical human ocular aberrations. This work makes the vSHWS’s implementation clearer, and the optimization methods and the obtained results are of great significance for its applications.

DOF and kinematics analysis of a 3-UPU parallel mechanism for telescope secondary mirror support

2021 ◽  
Author(s):  
Shuai Wang ◽  
Kunyao Zheng ◽  
Yi Chen ◽  
Mingming Xu ◽  
Dazhi Wang
Keyword(s):  
Parallel Mechanism ◽  
Kinematics Analysis ◽  
Secondary Mirror
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