Mitigating wavefront error caused by sky subcooling of the ELT structure

2020 ◽  
Author(s):  
Ronald Holzlöhner ◽  
Martin Brinkmann
Keyword(s):  
Wavefront Error

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

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.

Extracting Wavefront Error From Shack-Hartmann Images Using Spatial Demodulation

2006 ◽  
Vol 22 (9) ◽  
pp. 949-953
Author(s):  
Edwin J Sarver ◽  
Jim Schwiegerling ◽  
Raymond A Applegate
Keyword(s):  
Wavefront Error

Tomographic wavefront error using multi-LGS constellation sensed with Shack–Hartmann wavefront sensors

2010 ◽  
Vol 27 (11) ◽  
pp. A201 ◽  
Author(s):  
Clélia Robert ◽  
Jean-Marc Conan ◽  
Damien Gratadour ◽  
Laura Schreiber ◽  
Thierry Fusco
Keyword(s):  
Wavefront Sensors ◽  
Wavefront Error

Analysis of PointDiffraction Wavefront Error Based on Finite Difference Time Domain Method

2011 ◽  
Vol 38 (9) ◽  
pp. 0908003 ◽  
Author(s):  
陈琛 Chen Chen ◽  
杨甬英 Yang Yongying ◽  
王道档 Wang Daodang ◽  
卓永模 Zhuo Yongmo
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Time Domain Method ◽  
Domain Method ◽  
Wavefront Error ◽  
Difference Time

Method of Wavefront Error Test in the Outfield for Large Aperture Telescope

2012 ◽  
Vol 41 (1) ◽  
pp. 39-42
Author(s):  
李宏壮 LI Hong-zhuang ◽  
王志臣 WANG Zhi-chen ◽  
王富国 WANG Fu-guo ◽  
张振铎 ZHANG zhen-duo ◽  
刘欣悦 LIU Xin-yue
Keyword(s):  
Large Aperture ◽  
Wavefront Error
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