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.
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 |
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