Kodial Zero Length Viewports With X-Ray Protection Lead Glass

VacTechniche Vacuum Optics – Viewports

Kodial Zero Length Viewports With X-Ray Protection Lead Glass

VacTechniche CF kodial viewports are offered including an additional 6mm thick lead glass disc clipped in to the atmosphere side of the kodial window for X-Ray protection. The viewports comprise a borosilicate glass optic which is sealed to a kovar weld ring using an induction heater process.

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Description

The optic assemblies are TIG welded into the anges and are helium leak tested and cleaned for ultra high vacuum (UHV) conditions. The CF versions are offered using 304L or 316LN stainless steel anges. The rugged construction of the Kodial viewports allows repeated bake-out with UHV performance. The kodial/lead glass window assembly provides visible. Transmission as shown in the graph below.

Transmission Curve – Kodial

Specifications

Seal Type of the glass viewport only Induction (note, the lead glass is an additional disc clipped in to the viewport)
Maximum Temperature 350°C
Minimum Temperature minus 20°C
Maximum Rate of Temperature Change 3°C per minute
Leak Rate <1×10-10 atm-cc/sec (He)
Pressure range 1 bar to 1×10-11 mbar

Cross Sections / Diagrams

Parts & Variations

Part Number Flange Type OD mm View Diameter mm Optic Thickness mm Lead Glass Thickness mm Flange Material Weld Ring Material
VPZ16LG NW16CF 34 15 1 6 304L Kovar
VPZ16LG-LN NW16CF 34 15 1 6 316LN Kovar
VPZ38LG NW35CF 70 32 2.5 6 304L Kovar
VPZ38LG-LN NW35CF 70 32 2.5 6 316LN Kovar
VPZ64LG NW63CF 114 63 3 6 304L Kovar
VPZ64LG-LN NW63CF 114 63 3 6 316LN Kovar
VPZ100LG NW100CF 152 89 4 6 304L Kovar
VPZ100LG-LN NW100CF 152 89 4 6 316LN Kovar
VPZ150LG NW150CF 203 136 6.5 6 304L Kovar
VPZ150LG-LN NW150CF 203 136 6.5 6 316LN Kovar