At the core of the head there is a single detector element, which measures just the portion of the laser that the slit allows to pass. This drum has two slits on it, one for each axis of the laser. Here’s how it works: Inside the head is a drum which spins at a 45° angle. Let’s take a step back and examine the inner workings of a scanning slit beam profiler, assuming for a moment that we’re working with a CW laser for simplicity.Īs you can see in the above diagram, a scanning-slit profiler has a fairly complex design. You may be wondering – understandably so – why this matters. Scanning slit profilers (such as Ophir’s NanoScan) boast several advantageous qualities, such as the ability to measure high powers without attenuation, relatively inexpensive infrared compatibility, and more.īut when someone mentions pulsed beams, several questions seem to pop up out of nowhere: What’s your pulse frequency? Beam width? What kind of accuracy are you looking for?
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