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Re-Entrant, Fused Silica Specifications

Leak Rate: <2x10(-10) atm cc/sec He
Parallelism:
UV Grade: <30 Arc Minutes
DUV Grade: <10 Arc Minutes
Flange Material:  304/316 Stn. Stl.
Flatness: 
DUV Grade:  l /4@ 632 nm Transmitted Wavefront
Surface Finish:

UV Grade:
40/20 Scratch/Dig
DUV Grade:
20/10 Scratch/Dig
Thermal Range: 
-100°C to 200°C
Material: 
Corning HPFS 7980 Fused Silica
Transmission: 

UV Grade: 
>90% @ 250nm (external)
DUV Grade: 
>99.8% @ 248nm (internal)
Homogeneity Grade: 

UV Grade: 
F
DUV Grade: 
A
Inclusion Class: 

UV Grade: 
2
DUV Grade: 
0





Operating Conditions

The thermal ratings specified are safe operating limits determined by various factors including material properties, mechanical design, and the intended operating environment. Temperature ratings for various mounting options may reduce the operating range of a window assembly. All assemblies have a maximum thermal gradient of 25ºC per minute and may be damaged if this limit is exceeded.


Re-Entrant Viewports

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VIEWPORT, FUSED SILICA, DUV, RE-ENTRANT, 1.4 VIEW, 450CF
  VIEWPORT, FUSED SILICA, DUV, RE-ENTRANT, 1.4 VIEW, 450CF
DUV Grade (Laser) Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 1.40" View Dia, 4.50" Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$850.00
  View details
Part //: A6665-2-CF
 
VIEWPORT, FUSED SILICA, DUV, RE-ENTRANT, 2.7 VIEW, 600CF
  VIEWPORT, FUSED SILICA, DUV, RE-ENTRANT, 2.7 VIEW, 600CF
DUV Grade (Laser) Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 2.69" View Dia, 6.00” Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$1,450.00
  View details
Part //: A6667-2-CF
 
VIEWPORT, FUSED SILICA, EUV, RE-ENTRANT, 1.4 VIEW, 450CF
  VIEWPORT, FUSED SILICA, EUV, RE-ENTRANT, 1.4 VIEW, 450CF
EUV Grade Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 1.40" View Dia, 4.50" Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$1,150.00
  View details
Part //: A6665-3-CF
 
VIEWPORT, FUSED SILICA, EUV, RE-ENTRANT, 2.7 VIEW, 600CF
  VIEWPORT, FUSED SILICA, EUV, RE-ENTRANT, 2.7 VIEW, 600CF
EUV Grade Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 2.69" View Dia, 6.00” Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$1,950.00
  View details
Part //: A6667-3-CF
 
VIEWPORT, FUSED SILICA, UV, RE-ENTRANT, 1.4 VIEW, 450CF
  VIEWPORT, FUSED SILICA, UV, RE-ENTRANT, 1.4 VIEW, 450CF
UV Grade Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 1.40" View Dia, 4.50" Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$700.00
  View details
Part //: A6665-1-CF
 
VIEWPORT, FUSED SILICA, UV, RE-ENTRANT, 2.7 VIEW, 600CF
  VIEWPORT, FUSED SILICA, UV, RE-ENTRANT, 2.7 VIEW, 600CF
UV Grade Fused Silica Viewport, Re-entrant Design, 3.50" In-Vacuum Length, 2.69" View Dia, 6.00” Conflat Flange
Author Download PDF Drawing Publisher Download 3d step file
$1,150.00
  View details
Part //: A6667-1-CF
 
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