كرة نقل 4 بوصة، F/1.5، 1/20 موجة، مطلية

The F/1.5 aperture really lets me test fast systems without vignetting—the 1/20 wave figure holds up beautifully in the interferometer. I've used it on three different setups now and the fringes stay razor sharp every time, which is exactly what I needed for final alignment work.

The Dynaflect coating on this 4" sphere really cuts down on stray reflections during our interferometry tests. It's noticeably cleaner than the uncoated reference we had before.

The 1/20 wave surface on this F/1.5 sphere holds up beautifully—fringes stay clean and straight right out to the edge of the aperture. Coating looks uniform under inspection, no sleeks or pinholes. Setup on our interferometer took minutes and the alignment was dead stable.