Topic Optomechanics

A kinematic mount constrains an optic at exactly six degrees of freedom, so it returns to the same place after adjustment. Most alignment drift is not the mount itself: it is thermal expansion of the posts, an over-tightened optic, or a beam path that is longer than the bench is stiff.

Both are cage systems built around a cube with four rod faces, so an optic can be swapped without realigning the train. Microbench works on a 30 mm pitch and takes 25 mm optics; Nanobench works on 16 mm and takes small mounted optics for fibre and diode work. Pick by the clear aperture you need, not by the size of the bench.