مرجع مسطح 18 بوصة 4% (6068-0456-01)

The 4% reflectivity makes it perfect for my interferometry setup, and it arrived in pristine condition. Cleaned up easily and the 18-inch surface is dead flat to the naked eye.

This 18-inch reference flat is exactly what I needed for calibrating my interferometer — the 4% reflectivity on a transmission flat is spot-on for my setup. The surface quality looks flawless under inspection, and it arrived securely packed without any scratches or damage.

Finally have an accurate reference for my interferometer setup. The 4% reflectivity on this 18" transmission flat makes fringe contrast much cleaner than my old part.