Precision Quality Flat Mirrors, Uncoated

$27.03 ~~$42.9~~ In stock

Esco Optics offers precision quality flat mirror substrates. Manufactured using Borofloat-33 (12.7mm) these mirrors are polished to 1/10 wave surface accuracy and 40/20 scratch/dig over an 85% aperture. The second surface is ground and all edges are beveled. Diameter tolerance is +0/-0.1mm

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Customer Reviews (4.6 / 5 · 5 reviews)

Scarlett ★★★★★ Oct 17, 2026

Got these for a home lab project and the 40/20 scratch/dig polish is exactly what I needed for clean beam steering. The Borofloat-33 substrate feels solid and well made for the price.

Kevin ★★★★★ Oct 13, 2026

The 1/10 wave surface accuracy on this flat mirror is no joke — my interferometer readings came back cleaner than anything I've gotten from standard substrates in this price range. The 40/20 scratch/dig spec held up perfectly under inspection too, no sleeks or pits anywhere in the 85% aperture.

Timothy ★★★★★ Oct 11, 2026

The 1/10 wave surface accuracy is spot-on—my laser beam reflection is perfectly crisp with zero distortion.