Sfera di trasmissione 4" - Convergente F/80 - 1/10 di onda

The 1/10 wave specification on this 4" sphere is no joke—my interferograms are noticeably cleaner than with my old plate. It threads onto my mount perfectly and the glass surface is immaculate right out of the box.

I needed a high-quality reference surface for aligning a small collimator, and the 1/10 wave specification on this F/80 converger gives me confidence the beam will stay clean. The 4-inch aperture is just right for my setup, and the mounting threads were smooth without any wobble.

The wavefront error on this F/80 converger measured out at exactly 1/10 wave PV on my interferometer, just as specified. Setup was straightforward and the 4-inch aperture gives a clean, well-corrected reference surface for testing my larger optics.