As explained in Supporting Information, from the volume of a powder particle 𝑉𝑝Vp, the projected area of the laser beam 𝐴𝑟𝑏Arb, and the projected area of the powder particle 𝐴𝑟𝑝Arp, one can calculate the laser power for degradation 𝑃𝐷𝑟𝑒𝑓+𝑎𝑏𝑠PDref+...
If you don’t know the beam divergence, use 1 milliradian for lasers under 500 milliwatts in power, and 1.5 milliradians for lasers 500 milliwatts and above. Here are the equations, which are explained in much more detail below.These calculations make some simplifying assumptions which are ...
A laser pointer for continuously drawing arbitrary shapes on a surface comprises a micro-electro-mechanical system (MEMS) mirror configured to deflect an emitted laser beam, wherein
Moving the pointer over the bubble changes the arrow to a gloved hand, which indicates that the area underneath the pointer is selectable. You can select the bubble using either the mouse or the keyboard, and a message box will appear with a brief explanation of why the control is disabled...
Adjust the media-width guides outward so that the pointer matches the paper size that you are loading. 3. On the rear paper-length guide, press on the blue tab and adjust it so that the pointer matches the paper size that you are loading. 4. Place the paper in the tray and make ...
A high-power laser in this instance is one in the multi-petawatt range. A petawatt is a million billion watts. For comparison, the Sun delivers about 174 petawatts of solar radiation to the Earth’s entire upper atmosphere. A laser pointer delivers about 0.005 watt to a Power Point sl...
Alternatively, the red wavelength may be provided by a diode laser that serves just as a pointer beam. A disadvantage in using two light sources is the extra space and added cost required for the extra light sources, beam splitters, isolators, and other components. Another disadvantage in ...
As explained in Section 2.1, the pressure of the shock wave in LSP treatment is on the order of GPa. This high pressure promotes plastic deformation, high dislocation density CRS, and grain refinement in the microstructure of the material. It is known from the dislocation strengthening theory ...
Remove board power; remove the test equipment; restore the original connections to the laser pointer and photodiode. Setting laser current: On the transmitter board, connect the leads of a multimeter to TP4 and TP5. Set the multimeter to read millivolts. ...
If you wired everything as explained, the Arduino should now run the laser show right away. Since the laser pointer does not have a lot of power, you will need a dark place to fully enjoy the show. Of course you can upgrade the project to a more powerful laser diode, but this is ...