Optical surface figure of lens under kinematic mount apparatus and its reproducibility

2013 ◽  
Vol 21 (8) ◽  
pp. 2000-2007 ◽  
Author(s):  
于新峰 YU Xin-feng ◽  
巩岩 GONG Yan ◽  
倪明阳 NI Ming-yang ◽  
秦硕 QIN Shuo
Keyword(s):  
Optical Surface ◽  
Surface Figure

Three-step shift-rotation absolute measurement of optical surface figure with irregular shaped aperture

2018 ◽  
Vol 426 ◽  
pp. 589-597 ◽  
Author(s):  
Jinyu Du ◽  
Zhongming Yang ◽  
Zhaojun Liu ◽  
Guobin Fan
Keyword(s):  
Absolute Measurement ◽  
Optical Surface ◽  
Shift Rotation ◽  
Surface Figure

scholarly journals Influence of mounting on the optical surface figure in optical reference surfaces

2020 ◽  
Vol 15 (01) ◽  
pp. P01005-P01005
Author(s):  
V. Lédl ◽  
I. Fortmeier ◽  
P. Psota ◽  
M. Schulz ◽  
O. Matoušek ◽  
...  
Keyword(s):  
Optical Surface ◽  
Optical Reference ◽  
Surface Figure

Discussion on Laser Cleaning of Optical Surface Machined by Magnetorheological Finishing

2010 ◽  
Vol 135 ◽  
pp. 409-412 ◽  
Author(s):  
Gui Wen Kang
Keyword(s):  
Laser Cleaning ◽  
Numerical Control ◽  
Flowing Water ◽  
Optical Surface ◽  
Working Ability ◽  
Magnetorheological Finishing ◽  
High Quality ◽  
Finishing Process ◽  
Optical Manufacturing ◽  
Surface Figure

Magnetorheological finishing (MRF) is a novel precision optical machining technology. Owing to its flexible finishing process, MRF can eliminate subsurface damage, smooth rms micro roughness and correct surface figure errors. Through proper designing of numerical control, sphere and asphere optics can be machined by magnetorheological finishing with high quality. Owing to it’s excellence in optical manufacturing, MRF has gained more and more application in industry. Under most conditions the optical surface after MRF would have certain contaminant particles and this would affect its working ability in future use. Formerly the polished workpiece is cleaned by flowing water or ultrasonic cleaning and the contaminat particles couldn’t be totally removed. Laser cleaning is brought forward in this paper and good results could be anticipated.

Variation of the amount of hydrogen along the galactic ridge

1967 ◽  
Vol 31 ◽  
pp. 171-172
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Surface Brightness ◽  
Milky Way ◽  
Neutral Hydrogen ◽  
Line Of Sight ◽  
Optical Surface ◽  
Hydrogen Density ◽  
Continuous Radiation ◽  
Galactic Longitude

The integralNHof neutral-hydrogen density along the line of sight is determined from the Kootwijk and Sydney surveys. The run ofNHwith galactic longitude agrees well with that of thermal continuous radiation and that of the optical surface brightness of the Milky Way.

Optical Surface Photometry of a Sample of Disk Galaxies. I. Observations and Data Reduction

2000 ◽  
Vol 119 (4) ◽  
pp. 1638-1644 ◽  
Author(s):  
J. A. L. Aguerri ◽  
A. M. Varela ◽  
M. Prieto ◽  
C. Muñoz-Tuñón
Keyword(s):  
Data Reduction ◽  
Disk Galaxies ◽  
Surface Photometry ◽  
Optical Surface

Improve the structure and optical surface properties of LDPE by ion bombardment technique

2021 ◽  
Vol 114 ◽  
pp. 110940
Author(s):  
A.M. Abdul-Kader ◽  
A.M. Salem ◽  
A.H. Al-Omari ◽  
Y.A. El-Gendy ◽  
Awad Al-Rashdi
Keyword(s):  
Surface Properties ◽  
Ion Bombardment ◽  
Optical Surface

Comparative Surface Imaging Study of Multifocal Diffractive Intraocular Lenses

2021 ◽  
Author(s):  
Hyeck Soo Son ◽  
Jung Min Lee ◽  
Ramin Khoramnia ◽  
Chul Young Choi
Keyword(s):  
Imaging Study ◽  
The Other ◽  
Intraocular Lenses ◽  
Optical Surface ◽  
Diffractive Optic ◽  
Atomic Force ◽  
Acceptable Range ◽  
Different Types ◽  
Concentric Pattern

Abstract Purpose To analyse and compare the surface topography and roughness of three different types of diffractive multifocal IOLs. Methods Using scanning electron microscope (SEM, Inspect F, 5.0 KV, maximum magnification up to 20,000) and atomic force microscope (AFM, Park Systems, XE-100, non-contact, area profile comparison, 10 × 10 µm, 40 × 40 µm), the surface quality of the following diffractive IOLs was studied: the AcrySof IQ PanOptix (Alcon, USA), the AT LARA 829MP (Carl Zeiss Meditec, Germany), and Tecnis Symfony (Johnson&Johnson Vision, USA). The measurements were made over three representative areas (central non-diffractive optic, central diffractive optic, and diffractive step) of each IOL. Roughness profile in terms of mean arithmetic roughness (Ra) and root-mean-squared roughness (Rq) values were obtained and compared statistically. Results In SEM examination, all IOLs showed a smooth optical surface without any irregularities at low magnification. At higher magnification, Tecnis Symfony showed unique highly regular, concentric, and lineate structures in the diffractive optic area which could not be seen in the other studied diffractive IOLs. The differences in the measured Ra and Rq values of the Tecnis Symfony were statistically significant compared to the other models (p < 0.05). Conclusion Various different topographical traits were observed in three diffractive multifocal IOLs. The Ra values of all studied IOLs were within an acceptable range. Tecnis Symfony showed statistically significant higher surface Ra values at both central diffractive optic and diffractive step areas. Furthermore, compared to its counterparts, Tecnis Symfony demonstrated highly ordered, concentric pattern in its diffractive surfaces.

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