4인치 F/0.75 투과 구면 - 1/10 파장

I've been using this in my lab for a few weeks now, and the 4-inch aperture makes alignment much easier than with smaller spheres. The f/0.75 speed really lets me test fast optics without any vignetting issues I've had before.

This transmission sphere improved my interferometry setup noticeably—the 1/10 wave accuracy made fringe analysis cleaner right out of the box. It's solidly built and aligned well with my existing gear, though I wish it came with a protective cap for storage. Still, for the precision work I do, it's

The fringe contrast is noticeably cleaner with this sphere, and the 1/10 wave accuracy gave me more confidence in my interferometer setups. I knocked off a star because the housing feels a bit less robust than I’d like for the price, but the optical performance itself has been spot-on.