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Round Flat Mirror

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  • This precision plane mirror is highly polished to λ/10 flatness except indicating otherwise. They are intended for front surface use and are parallel to within 3 arc minute. These mirrors are not recommended for use as transmitting optics as the rear surface is only commercially polished. Circles, squares and rectangles are available in BTMT. Select a coating appropriate to your application using these mirrors.


Material: BK7 & UVFS
Surface Flatness:

Side1: λ /10@633nm

Side2: commercial polish


less than 3 arc minutes

Diameter Tolerance: +0.00/-0.20mm
Thickness Tolerance:


Clear Aperture: >90% of central diameter
Bevel: 0.3mmX45°