Excimer laser-induced ablation in corneal surgery by a two-dimensional scanning method

1994 ◽  
Author(s):  
Angela Unkroth ◽  
Karin Pachomis ◽  
Eberhard Welsch ◽  
Jens-Uwe Walther ◽  
D. Zimare ◽  
...  
Keyword(s):  
Excimer Laser ◽  
Two Dimensional ◽  
Corneal Surgery ◽  
Scanning Method

Corneal surgery by two-dimensional scanning of a low-energy excimer laser beam

1994 ◽  
Author(s):  
Angela Unkroth ◽  
Karin Pachomis ◽  
Jens-Uwe Walther ◽  
D. Zimare
Keyword(s):  
Laser Beam ◽  
Excimer Laser ◽  
Low Energy ◽  
Two Dimensional ◽  
Corneal Surgery

Fabrication and Characterization of 3D Aspheric Microlenses with Arbitrary Surface Profiles Based on a Novel Excimer Laser Contour Scanning Method

2006 ◽  
Vol 505-507 ◽  
pp. 67-72
Author(s):  
Yung Chun Lee ◽  
Chun Ying Wu
Keyword(s):  
Excimer Laser ◽  
Surface Profile ◽  
Aspheric Surfaces ◽  
Scanning Method ◽  
System A ◽  
Continuous Surface ◽  
Surface Profiles ◽  
Profile Accuracy ◽  
Method Show

This paper presents a new method for fabricating 3D microstructures with an excimer laser micromachining system. A novel mask contour scanning method is developed for obtaining precise 3D microstructures with pre-described continuous surface profile. Two different microlenses with spherical and aspheric surfaces profiles with dimension less than 200 μm are fabricated on polycarbonate (PC) samples. The surface profiles are measured and compared with their theoretical counterparts. Excellent agreements both in profile shapes and dimensions are achieved. The surface roughness (Ra) of the machined surfaces is also measured and is less than 10 nm. The machining profile accuracy and surface smoothness of this proposed micromachining method show great potentials in fabricating micro-optic components such as aspheric microlenses or microlens arrays.

scholarly journals Novel application for pseudopodia proteomics using excimer laser ablation and two-dimensional difference gel electrophoresis

2012 ◽  
Vol 92 (9) ◽  
pp. 1374-1385 ◽  
Author(s):  
Akihiko Ito ◽  
Takahiro Mimae ◽  
Ying-Shan-Zhu Yamamoto ◽  
Man Hagiyama ◽  
Jun Nakanishi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Excimer Laser ◽  
Gel Electrophoresis ◽  
Two Dimensional ◽  
Excimer Laser Ablation ◽  
Difference Gel Electrophoresis

Spherical and Aspheric Microlenses Fabricated by Excimer Laser LIGA-like Process

2006 ◽  
Vol 129 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Yung-Chun Lee ◽  
Chun-Ming Chen ◽  
Chun-Ying Wu
Keyword(s):  
Surface Roughness ◽  
Excimer Laser ◽  
Focal Length ◽  
Surface Profile ◽  
Polymer Materials ◽  
Laser Machining ◽  
Scanning Method ◽  
Average Surface ◽  
Direct Laser ◽  
Profile Accuracy

This paper presents an effective and low-cost method for fabricating spherical and aspheric microlenses based on excimer laser LIGA-like processes. It is based on a newly developed excimer laser micromachining technique that can accurately machine a 3D microstructure with a predetermined continuous surface profile. The method is called the planetary scanning method since it is based on a combination of sample rotation and revolution and a concept of laser machining probability. Spherical and aspheric microlenses with precise and smooth surface profiles are fabricated by direct laser machining on polymer materials. Laser-machined microlenses are replicated by electroforming to obtain inverse metal molds. Finally, plastic microlenses are replicated from these metal molds using hot embossing method. The profile accuracy and surface roughness of the produced microlenses at each stage have been measured and monitored. The average surface profile accuracy is better than 1μm and average surface roughness is less than 10nm. Optical performance of the fabricated microlenses is evaluated by measuring the light intensity distribution at the focal plane and the focal length. Experimental data show that the characteristics of fabricated spherical and aspheric microlenses are well matched to the theoretical predictions, which demonstrates the controllability and accuracy of this micromachining process. Potential applications and further developments will be addressed.

Decision Assistant Wizard to Standardize Optimal Outcomes in Excimer Laser Refractive Corneal Surgery

2010 ◽  
Vol 26 (12) ◽  
pp. 980-990 ◽  
Author(s):  
Maria Clara Arbelaez ◽  
Tobias Ewering ◽  
Samuel Arba Mosquera
Keyword(s):  
Excimer Laser ◽  
Corneal Surgery ◽  
Optimal Outcomes
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