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Birefringent Filter

Birefringent Filter
Material Crystal Quart
Diameter Tolerance +0/-0.2mm
Clear Aperture >90%
Thickness T=0.5mm, 1mm, 1.5mm, 2.0mm
Thickness Tolerance ±0.005mm
Surface Quality 20/10 scratch and dig
Parallelism <5 arc sec
Coating None