Dynaflect 鍍膜 4吋 f/3.3 透射球

I was nervous about coating quality, but the Dynaflect coating on this 4-inch transmission sphere came flawless—zero defects visible under interferometry. The f/3.3 aperture gives me clean fringes even with my test setup, and the Zygo-specific SKU 6024-0399-14 matched what I needed.

Setup was straightforward and the f/3.3 transmission sphere fit perfectly on my interferometer. The Dynaflect coating really cut down on ghost reflections during alignment.

The coated optics are noticeably cleaner than my old uncoated sphere, and the f/3.3 aperture gives me a crisp, even wavefront right out of the box. I’ve already used it to check three lenses—solid upgrade for the bench.