Kodial Zero Length Viewports

VacTechniche Vacuum Optics – Viewports

Kodial Zero Length Viewports

VacTechniche Kodial viewports are offered in CF, ISO and KF flange styles. The viewports comprise a borosilicate glass optic which is sealed to a Kovar weld ring using an induction heater process.

The optic assemblies are TIG welded in to 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. Flanges in 316L stainless steel are used for the high vacuum KF and ISO viewports.

Category:

Description

The rugged construction of the Kodial viewports allows repeated bake-out with UHV performance, whilst the window offers broadband optical transmission from the visible to near infrared. Anti- e ective coatings to match customer re ectance requirements are also processed at VacTechniche. Please advise the wavelength or wavelength ranges of your application and a re ectance curve will be prepared. Non-standard viewports can be manufactured on request, including re-entrant style microscope/camera viewports. Annealed copper gaskets and other component accessories are also supplied by VacTechniche.

Transmission Curve – Kodial

Specifications

Seal Type Induction
Maximum Temperature 350°C (KF versions 150°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 Flange Thickness mm Flange Material Weld Ring Material
VPZ16 NW16CF 34 15 1 12.7 304L Kovar
VPZ16-LN NW16CF 34 15 1 12.7 316LN Kovar
VPZ38 NW35CF 70 32 3 12.7 304L Kovar
VPZ38LA NW35CF 70 38 3 12.7 304L Kovar
VPZ38-LN NW35CF 70 32 3 12.7 316LN Kovar
VPZ38LA-LN NW35CF 70 38 3 12.7 316LN Kovar
VPZ64 NW63CF 114 63 3 17.4 304L Kovar
VPZ64LA NW63CF 114 65 3.5 17.4 304L Kovar
VPZ64-LN NW63CF 114 63 3 17.4 316LN Kovar
VPZ100 NW100CF 152 89 4 19.9 304L Kovar
VPZ100-LN NW100CF 152 89 4 19.9 316LN Kovar
VPZ150 NW150CF 203 136 6.5 22.3 304L Kovar
VPZ150-LN NW150CF 203 136 6.5 22.3 316LN Kovar