Soft Contact Lens Surface Profile by Atomic Force Microscopy

Author(s):  
Maria J. Giraldez ◽  
Carmen Serra ◽  
Madalena Lira ◽  
M. Elisabete C. D. Real Oliveira ◽  
Eva Yebra-Pimentel
2018 ◽  
Vol 165 ◽  
pp. 229-234 ◽  
Author(s):  
Rafał Brygoła ◽  
Sławomir Sęk ◽  
Maciej Sokołowski ◽  
Marek Kowalczyk-Hernández ◽  
Jacek Pniewski

2011 ◽  
Author(s):  
M. J. Giraldez ◽  
C. Garcia-Resua ◽  
M. Lira ◽  
C. Sánchez-Sellero ◽  
E. Yebra-Pimentel

Micron ◽  
2007 ◽  
Vol 38 (3) ◽  
pp. 286-290 ◽  
Author(s):  
A. Antunes ◽  
F.V. Gozzo ◽  
M. Nakamura ◽  
A.M.V. Safatle ◽  
S.L. Morelhão ◽  
...  

2019 ◽  
Vol 42 (6) ◽  
pp. e36
Author(s):  
Pete Kollbaum ◽  
Dawn Meyer ◽  
Olivia Reed ◽  
Matt Jaskulski ◽  
Martin Rickert ◽  
...  

2006 ◽  
Vol 76B (2) ◽  
pp. 412-418 ◽  
Author(s):  
José M. González-Méijome ◽  
Antonio López-Alemany ◽  
José B. Almeida ◽  
Manuel A. Parafita ◽  
Miguel F. Refojo

Author(s):  
Zone-Ching Lin ◽  
Ming-Ho Chou

This study constructs a novel Tapping Mode Atomic Force Microscopy (TM-AFM) model under vibration environment and analyzes the effect of probe size. The TM-AFM measurements are affected by external vibration and the size of the probe. In this study, a sinusoidal external vibration is applied, and TM-AM fixed-amplitude vibration simulated measurements made. The effect of external vibration on the surface profile acquired the simulated measurement of a nano-scale ladder standard sample. The simulated measurements under sinusoidal vibration are compared with actual experimental measurements without vibration isolation facilities, and the corrugations in the two cases were similar, indicating that the simulated measuring model under sinusoidal wave vibration proposed in this study is effective in qualitative analysis. An external vibration during the TM-AFM measurements causes an error between the measured surface profile of the sample and the actual appearance. Additionally simulated measurements are made on the edge of the nano-scale ladder standard sample, and the wave shape is affected by external vibration. The effects of the bevel angle and radius of the sharp end of the TM-AFM probe on the bevel edge effect of the probe and the measured appearance are studied. Qualitative analysis reveals that the bevel angle. Additionally, a smaller probe radius is associated with a simulated result that is closer to the perpendicular side of the ladder standard sample. The results in this study serve as a reference in the selection of probe size and in the qualitative analysis of the effect of external vibration on TM-AFM measurement.


2011 ◽  
Vol 291-294 ◽  
pp. 1759-1763 ◽  
Author(s):  
Xiao Zong Song ◽  
Yong Zhang ◽  
Fei Hu Zhang

In this paper, ultra-precision shaping and polishing experiments have been done to research the shaping and polishing characters of nanoparticle colloid jet machining. A high-purity quartz glass sample with aspheric surface profile was employed as workpiece and polished by nanoparticle colloid jet machining. We utilized surface profilometer to measure the surface profiles of workpiece before and after shaping by nanoparticle colloid jet machining. The measurement results indicate that the nanoparticle colloid jet machining has good shaping ability to satisfy the demands for surface shape correction in ultra-precision machining. Atomic force microscopy (AFM) was utilized to observe the surface microscopic morphological characteristics of the workpiece surface polished by nanoparticle colloid jet machining. The observation results show that the roughness of the workpiece surface has been reduced from 1.919 nm RMS to 0.784 nm RMS by nanoparticle colloid jet machining. Based on the atomic force microscopy observation results, power spectral density analyses have been done to evaluate the polishing performance of the nanoparticle colloid jet machining.


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