Method of reconstructing wavefront aberrations from the intensity measurement

2007 ◽  
Vol 32 (24) ◽  
pp. 3507 ◽  
Author(s):  
Tae Moon Jeong ◽  
Do-Kyeong Ko ◽  
Jongmin Lee
Keyword(s):  
Intensity Measurement ◽  
Wavefront Aberrations

scholarly journals Predictive control of thermally induced wavefront aberrations

2013 ◽  
Vol 21 (18) ◽  
pp. 21530 ◽  
Author(s):  
A. Haber ◽  
A. Polo ◽  
I. Maj ◽  
S.F. Pereira ◽  
H.P. Urbach ◽  
...  
Keyword(s):  
Predictive Control ◽  
Thermally Induced ◽  
Wavefront Aberrations

scholarly journals Aspheric Intraocular Lenses Implantation for Cataract Patients with Extreme Myopia

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yanwen Fang ◽  
Yi Lu ◽  
Aizhu Miao ◽  
Yi Luo
Keyword(s):  
Contrast Sensitivity ◽  
Visual Quality ◽  
Intraocular Lenses ◽  
Wavefront Aberrations ◽  
Spatial Frequencies ◽  
Aspheric Iol ◽  
Significant Difference ◽  
Composite Scores ◽  
Cataract Patients

Objective. To evaluate the postoperative visual quality of cataract patients with extreme myopia after implantation of aspheric intraocular lenses (IOLs). Methods. Thirty-three eyes were enrolled in this prospectivestudy. Eighteen eyes with an axial length longer than 28 mm were included in the extreme myopia group, and the other 15 eyes were included in the nonextreme myopia group. Phacoemulsification and aspheric IOL implantation were performed. Six months after cataract surgery, best-corrected visual acuity (BCVA), contrast sensitivity, and wavefront aberrations were measured, and subjective visual quality was assessed. Results. The BCVA improved significantly after surgery for both groups, and patients in the nonextreme myopia group achieved better postoperative BCVA due to better retinal status of the eyes. The evaluation of contrast sensitivity without glare was the same in both groups, whereas patients in the nonextreme myopia group performed better at intermediate spatial frequencies under glare conditions. The two groups did not show a significant difference in high-order aberrations. With regard to subjective visual quality, the composite scores of both groups did not differ significantly. Conclusions. Aspheric IOLs provided good visual outcomes in cataract patients with extreme myopia. These patients should undergo careful evaluation to determine the maculopathy severity level before surgery.

Optimal actuator placement in adaptive optics systems

2021 ◽  
pp. 107754632110324
Author(s):  
Berk Altıner ◽  
Bilal Erol ◽  
Akın Delibaşı
Keyword(s):  
Cost Function ◽  
Adaptive Optics ◽  
Disturbance Attenuation ◽  
Linear Quadratic ◽  
Placement Problem ◽  
Convex Optimization Problem ◽  
Wavefront Aberrations ◽  
The Cost ◽  
Actuator Placement ◽  
Quadratic Cost Function

Adaptive optics systems are powerful tools that are implemented to degrade the effects of wavefront aberrations. In this article, the optimal actuator placement problem is addressed for the improvement of disturbance attenuation capability of adaptive optics systems due to the fact that actuator placement is directly related to the enhancement of system performance. For this purpose, the linear-quadratic cost function is chosen, so that optimized actuator layouts can be specialized according to the type of wavefront aberrations. It is then considered as a convex optimization problem, and the cost function is formulated for the disturbance attenuation case. The success of the presented method is demonstrated by simulation results.

Remark to the Intensity Measurement of RHEED

2005 ◽  
Vol 48 (5) ◽  
pp. 679-682
Author(s):  
A. Nemcsics ◽  
J. Olde ◽  
M. Geyer ◽  
K. Reshoft
Keyword(s):  
Intensity Measurement

Intensity measurement for K? ? satellites in the radiative auger effect

1984 ◽  
Vol 27 (9) ◽  
pp. 743-748
Author(s):  
V. L. Sukhorukov ◽  
I. D. Petrov ◽  
V. F. Demekhin ◽  
V. F. Volko
Keyword(s):  
Intensity Measurement ◽  
Auger Effect

scholarly journals Near work induced wavefront aberrations in myopia

2005 ◽  
Vol 45 (10) ◽  
pp. 1297-1312 ◽  
Author(s):  
Tobias Buehren ◽  
Michael J. Collins ◽  
Leo G. Carney
Keyword(s):  
Wavefront Aberrations ◽  
Near Work
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