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CF Flanged Sapphire Viewports

  • 99.99% Alumina Sapphire Viewports
  • CF Viewports
  • Flanged Sapphire Viewports
  • CF Flanged Sapphire Viewports
  • Sapphire Viewports
  • Viewports

High purity Sapphire viewports offer a hermetically-sealed lens with upgraded optical, mechanical, and corrosion properties across a wide spectrum. Innovacera’ Sapphire viewports are rated for both high vacuum(HV) and ultrahigh vacuum(UHV) applications.
The use of high purity sapphire and low expansion alloys allow these viewports to be repeatedly baked out at temperatures up to 350°C. The crystal orientation of our sapphire viewports is normal to the optical axis, also referred to as a 90° orientation. All viewports up to one-inch in diameter are made with UV grade sapphire.

Flanged Sapphire Viewports

Specifications:

– Materials
Flange 304 Stainless Steel
Glass Substrate Sapphire
Seal Vacuum Brazed

Features:

  • Single-crystal Sapphire
  • Positioning/direction: 0-90°
  • Ultraviolet and regular grades
  • Optically polished substrate faces
  • UHV compatible construction
  • High Temperature rated to 350°C
  • Stainless steel / NiFe construction
  • Custom Solutions By Customer Request

Sapphire Properties：

Property Value
Chemical Formula Sapphire(99.99%Al2O3)
Mechanical
Density 3.97 gm/cc
Hardness 22.5 GPa
Modulus of Elasticity 470 GPa
Flexural Strength 690 MPa
Compressive Strength 2940 MPa
Poisson’s Ratio –
Fracture Toughness –
Electrical
Dielectric Strength 48 ac V/mm
Dielectric Constant 9.3 (@ 1 MHz)
Volume Resistivity 10^14 ohm-cm
Dielectric Strength 48 ac V/mm
Thermal
Coefficient of Thermal Expansion 5.3 x 10^-6/°C
Thermal Conductivity 41 W/(m*K)
Specific Heat 0.75 x10^3 J/(Kg*K)
Shock Resistance –
Maximum Working Temperature 1900 °C
Optical
Index of Refraction 1.762
Birefringence –
Transmission Band –

*A warm note: All sapphire viewports are fragile and should be handled and mounted with extreme caution.

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