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Specifications:
Material: BK7 glass or Fused Silica
Surface Figure: Commercial polish
Surface Quality: 80-50
Parallelism: 1 arc min.
Dimension Tolerance: ¡À0.2mm
Coating: Vacuum-deposited metallic alloy
O.D. Tolerance: ¡À5%
Clear Aperture (CA): central 90% of dimension
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