RDWorks Learning Lab 207 The Importance of Beam Intensity @SarbarMultimedia

Uploaded April 2021 | Updated September 2026, 1 week ago

As I begin to understand how lenses really work in our laser machines many other puzzling issues seem to be resolving.
This understanding of lenses has highlighted just how vital it is to have almost perfect Gaussian beam intensity for successful cutting.
It is an accepted "fact" that more watts= deeper and /or faster cutting. I now find this incorrect on both counts. Deeper cutting is a factor associated with lens choice and faster cutting is dependent upon light INTENSITY. More watts= more light intensity but the efficiency of that energy transfer depends on the QUALITY of beam your tube can generate, The best beam quality you can ever achieve is a Gaussian intensity distribution. How good is yours????
A rarely considered factor that affects ALL machines is beam DIVERGENCE. The bigger your machine the more this factor will impact your cutting performance. I am sure machine builders don't even understand this when they sell you a big machine. Users will be shocked when they see this video and test their own machines.

RDWorks Learning Lab 207 The Importance of Beam Intensity

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$RDWorks Learning Lab 210 Lets Focus on Focus AGAIN The dictionary describes a focal point as that place where parallel rays of light passing through a lens are refracted to converge on a single point. That may apply to visible light for cameras and telescopes where light sources are uniform and lenses are high precision and usually multiples, but in the world of Chinese lasers things are a long way from that dictionary definition. The use of a single lens and then a choice of just two forms, plano convex and meniscus, is the first disadvantage. The simple spherical geometry of these lens forms will never achieve that dictionary perfection. The longer the focal length of the lens, the greater the imperfection. The single feature that ALL lasers beams posses is a non-uniform intensity profile. The perfect laser beam will conform to a Gaussian intensity distribution. ( a bell shape graph) where the central light intensity is many times greater than the outer regions of the beam. Combine the focussing weakness of spherical lens geometry with the non uniform intensity within the laser beam and we no longer have that idealized model of focus that we are all taught. We set the focal point for a lens to that distance where we create the smallest burn spot or the thinnest drawn line. This is not setting the LIGHT focal point but that point where the the light INTENSITY is sufficient to damage the material we are marking/cutting . I clearly demonstrate that the traditional model of focus is of very limited value in our weird world of lasers.$