IRK radius laser and interferometer

Interferometry is tricky, but this unit's precision made my measurements far more repeatable than my old setup. The radius laser component is solid and the whole thing feels robust for a spare part, so I'm glad I grabbed it.

Got the unit swapped in and the alignment held steady through a full afternoon of runs—the interferometer readings stayed consistent even after the laser warmed up.

The mounting bracket fits perfectly into our existing setup, and the laser alignment was spot-on out of the box. It replaced an older unit that kept drifting, and this one holds steady through repeated measurements. A solid upgrade for our quality lab.