22X 0.1NA Michelson objective Lens

Needed this as a drop-in replacement for my interferometry setup, and the 0.1NA works exactly as specified with my 22X inspection. Took a bit to align, but once seated, the fringe contrast is noticeably stable.

Finally swapped out the old optic on my bench and this 22X 0.1NA gives a noticeably crisper fringe pattern at low power, even on rough surfaces. The mount threads were clean and seated without any wobble, which is more than I can say for the last lens I tried. It's pricey, but for interferometry wor

Putting this on my interferometer made surface roughness measurements much clearer than my old lens, and the alignment was surprisingly stable right out of the box.