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Dr. Don Cohen’s series of free, one-hour webinars continues on October 1, 2026 with a segment on Surface Texture Parameters. The webinars are designed for engineers, quality pros, technicians, and

“I saw an orchestra last night. It was 100 decibels.”If you want to describe an orchestra performance, you’ll probably want to describe more than the volume! A symphony orchestra sounds

Are you interested in learning about surface texture, wear, friction, sealing, and more? Dr. Don Cohen is presenting a series of free, one-hour webinars that give an excellent introduction to

It’s easy to recognize a summer day just by the sounds: bird calls, trees rustling, kids playing…maybe lawn mowers and leaf blowers…Somehow, our brains process all that information as “summer.” 

In the world of surface texture, we talk about the size of the features that might impact an application. We use terms like form, waviness, and roughness to talk about

When we think of surface roughness, we often think of machined surfaces. But 3D optical measurement is also essential for controlling much more polished surfaces, such as optical components. Over

3D surface texture impacts friction, wear, and many other functions. In this video we look at 3D surface roughness measurement of automotive engine valves. These small parts have several critical

3D surface texture impacts friction, wear, and many other functions. This video looks at 3D surface roughness measurement of clutch plates. We look at how these surfaces can be tuned

Surface texture on medical devices affects many aspects of performance: how well an implant will bond to tissue, how blood will move over a device without clotting, how well a

 The May 2026 class is now FULL. Please contact us if you’d like us to inform you about upcoming classes. You may also want to check out the online classes. Dr. Donald Cohen’s