4" Verifire SV

The 4-inch aperture captures enough light for quick measurements on larger optics, and the fringes stay rock-stable once aligned. It's handled our daily shop-floor testing for two weeks without any drift.

The fringes stayed rock-steady during my whole measurement session, which made data collection noticeably less stressful. Phase repeatability on the 4-inch aperture came in well under spec, and the software interface didn't fight me once.

The 4" aperture is great for testing larger optics, and the stability over temperature changes has been impressive. Only minor gripe is the software interface could be a bit more intuitive for first-time users.