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 Product Information    SAPPHIRE VIEWPORTS (Continued)
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Refractive Index (SODIUM D-LINE)

Parallel to C Axis 1.768         Perpendicular to C Axis 1.760

OPTICAL TRANSMISSION CURVE U.V. GRADE
Reference Purposes Only

Wavelength in Microns

Operating Parameters

Transmission range 0.2 - 0.4 m 70%
  0.5 - 4.0 m 85%
  5.0 - 6.0 m 50%
Bakeout temperature 450C
Vacuum rating Better than 1x10-9 mbar litre sec-1



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