Wearing a welding mask, Anthony sweeps the bright light across a room and uses the focused lasers to pop balloons, scorch wood, and burn through a computer case.
Figure 4a shows the computing temperature profiles at the center of the focused laser spot, using FEM.
A pco.1600 CCD camera (PCO AG, Kelheim, Germany) was used to display the fluorescence image; the focused laser spot was also visible in the camera image.
The raw powder was analyzed using a × 1,000 objective lens to focus the laser beam on sample surface, and the size of the focused laser spot on the sample has a diameter of a few micrometers.
Using the focussed output of a pulsed laser imaging system, spatially resolved modifications of an oxide surface were carried out.
In the past few years, various types of lasers have also been utilized to produce micronanostructures with sharp ends (nanobumps, nanojets, nanoprotrusions) from the irradiation of thin metal films and bulk materials using tightly focused laser beams.
More recently, imaging using focused laser beams to initiate molecular desorption has become widespread using MALDI or laser ablation with electrospray postionization where fragmentation is much more controllable.
Optical trapping using focused laser beams has emerged as a powerful tool in the biological and physical sciences.
Moreover, high spatial resolution down to ∼100 μm and high temporal resolution can be obtained using focused laser beams and pulsed lasers, respectively.
In addition to temporal control mediated by the heat-shock promoter, induction using a focused laser-beam [ 12] could provide precise spatial control of the effector gene expression.
