The Portuguese alphabet contains twenty-four letters, and itâs a basic lesson of Portuguese vocabulary. Portuguese students begin learning Portuguese language with the alphabet, this is a essential step to learn how to write each letter an how to pronounce each one. If one learns this vocabulary topic very well, one will not have problems to write all Portuguese words.
Laser Entfernungsmesser image by Otmar Smit from Fotolia.com. A laser distance meter works by use measuring the time it takes a pulse of laser light to be reflected off a target and returned to the sender.perating Principle. A laser distance meter emits a pulse of laser at a target. The pulse then reflects off the target and back to the sending device (in this case, a laser distance meter).
resolution will be in the range of micrometers, but the maximum range is limited to only a few meters. Up to distances of 100m people often use the phase shift measurement. The laser light is modulated and the phaseshift between outgoing and incoming light gives the distance. To reach a resolution in the millimeter range very high sampling rates are necessary. Only low measuring rates with high current consumtion are possible the consequence. With Time-to-Digital-Converters (TDCâs) you choose the straight way. It is possible to measure directly the time-of-flight of light.