In the era of therapeutic endoscopy, a new device for precise cutting and simultaneous hemostasis is required. Laser technology allows immediate vaporization of tissue. The thulium laser is a new type of surgical laser. It emits a continuous 2-μm wavelength delivered through a thin, flexible laser fiber. Its penetration depth is approximately 0.25 mm, which is suitable for tissue resection with...

Inconel 718 is a typical hard-to-machine material that requires thermally enhanced machining technology such as laser-assisted milling. Based upon finite element analysis, this study simulates the forces in the laser-assisted milling process of Inconel 718 considering the effects of grain growth due to c0 and c00 phases. The c0 0 phase is unstable and becomes the d phase, which is likely to pre...

Laser assisted machining is an alternative to conventional machining of hard and/or difficult-to-process materials which involves pre-heating of a focused area with a laser beam over the surface of the workpiece to cause localized thermal softening along the path of the cutting action. The main advantage that laser assisted machining has over conventional machining is the increased material rem...

Laser straight cutting of zirconia is carried out. Temperature and stress fields developed in the cutting sections are predicted using the finite element code. The morphological changes in the cutting section are examined after incorporating the optical and scanning electron microscopes. The prediction of surface temperature is compared with its counterpart obtained from the thermocouple data. ...

Boundary encroachment or cutting right up to pre-cut sections are examples of unsteadystate operations of the laser cutting process. Cornering and generating small diameter holes also fall into this category. Heat transferis often frustrated here, resulting in bulk heating of the workpiece. This in tum leads to a degradation of the cut quality.' Currently, trial-and-error based experimentation ...

In a two-photon femtosecond laser system of three-dimensional micro-fabrication, a model of micro-device is fabricated layer by layer along its contours of cross-sections. So it is necessary to generate cutting path. In this paper, we present an efficient algorithm to generate cutting path which is a series of ordered contour points on each cross-section of a model. Keyword. Micro-fabrication, ...

Display manufacturers are investing heavily into production lines for OLED (Organic Light-Emitting Diode) displays. Volume production of active-matrix OLED has already started. The production will increase through the TV mobile phones demand for high-resolution mobile displays as the AM OLED can switch pixels 1,000 times faster than TFTLCD technology. A typical mask is only 40 micron thick and ...