Laser shock punching: principle and influencing factors

Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process

The aim of this paper is to fabricate micro-gears via laser shock punching with Spitlight 2000 Nd-YAG Laser, and to discuss effects of process parameters namely laser energy, soft punch properties and blank-holder on the quality of micro-gears deeply. Results show that dimensional accuracy is the best shocked at 1690 mJ. Tensile fracture instead of shear fracture is the main fracture mode under...

[Human factors in card punching operation].

Factors influencing results and outcome after transmyocardial laser revascularization.

BACKGROUND Transmyocardial laser revascularization (TMR) has been increasingly used during the recent past for patients with diffuse coronary artery disease. Because this operation is associated with significant morbidity and mortality, it is important to select patients for TMR who are likely to benefit from the procedure. METHODS We performed an univariate logistic regression analysis of 20...

Factors influencing cataract formation after Nd:YAG laser peripheral iridotomy.

PURPOSE The benign nature of Nd:YAG laser peripheral iridotomy (LPI) has recently been questioned because of increased cataract formation and other complications. This retrospective study includes 522 consecutive eyes of 275 individuals (group 1) on whom LPI was performed between January 1, 1991, and December 31, 2000, for which at least 5 years of complete follow-up was available. METHODS Pa...

Factors Influencing Corneal Flap Thickness in Laser In Situ Keratomileusis with a Femtosecond Laser

PURPOSE To evaluate factors responsible for the variability between intended and achieved corneal-flap thickness during femtosecond laser-assisted laser in situ keratomileusis (LASIK). METHODS A prospective, nonrandomized, case study was performed on 35 eyes of 18 consecutive patients who underwent LASIK surgery using the 60 kHz femtosecond laser microkeratome. Eyes were assigned to three dif...