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Kodial Re-Entrant
Kodial re-entrant viewports are typically used for inserting microscopes or cameras into UHV/Vacuum systems. The re-entrant viewports are offered in CF flanges as standard, but custom-designed viewports can be manufactured using ISO and KF flange styles on request.
- Description
- Specifications
- Transmission Curve - Kodial
- Additional Details
- Options
Description
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 into the tube assembly and are helium leak tested and cleaned for ultra-high vacuum (UHV) conditions. The CF versions are offered using 304L stainless steel flanges, but 316LN flanges can be offered on request.
The rugged construction of the Kodial viewports allows repeated bake-out with UHV performance, while the window offers broadband optical transmission from the visible to near infra-red. Anti-reflective coatings to match customer reflectance requirements are also processed at TSL. Please advise the wavelength or wavelength ranges of your application, and a reflectance curve will be prepared. Annealed copper gaskets and other component accessories are also supplied by TSL. Please contact Torr Scientific if you require a quotation for a re-entrant viewport with a different length or different dimensions.
| Seal Type | Induction |
|---|---|
| Maximum Temperature | 350 °C |
| Minimum Temperature | -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 |
