Specifications

Substrate Material: CaF2
Diameter (or Largest Dimension): 25.4 mm
Thickness: 3 mm
Antireflection Coating: Uncoated
Surface Quality (Scratch-Dig): 80-50
Surface Flatness: <= Lambda

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Features

Dimension Tolerance +0.0/-0.2mm
Thickness Tolerance ±0.2mm
Clear Aperture >90%
Parallelism <3 arc minutes
<!--3-->Surface Quality 80/50
Wavefront Distortion <λ per 25mm@633nm
Chamfer Protected <0.5mmx45deg
<!--0-->Coating None, per your request