Precision sensor manufacturer Micro-Epsilon says it is using a non-contact laser line for measurement of shiny metallic and rapidly changing, rough or other difficult-to-measure surfaces.

Its new displacement optoNCDT 2300LL sensor uses a laser line and algorithms to filter out interference caused by sub-micrometre surface defects on objects such as polished metals, mild steel and rubber, says the company. This is instead of using a spherical or point-shaped laser spot, it says.

The sensor uses a cylindrical lens that widens the laser spot to very small line. Measurements using this line are then averaged.

Ideal applications are on structured surfaces where the distance to the surface and not the structure itself needs to be measured, says the company. Its new product does not require a separate controller, and provides a measuring speed of up to 49.02kHz, it says.