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Zinc Selenide Zero Length
Selenide viewports are offered in CF, ISO, and KF flange styles. The viewports comprise a laser quality zinc selenide optic with precise flatness, parallelism, scratch and dig specifications.
- Description
- Specifications
- Transmission Curve - Zinc Selenide
- Additional Details
- Options
Description
The ultra high vacuum (UHV) CF versions are offered using high grade 304L or 316LN stainless steel flanges. Non-magnetic viewports are offered for low energy applications or surface science applications needing low magnetic fields. The non-magnetic viewports use a non-magnetic weld ring instead of the regular kovar weld ring.
Flanges in 304L stainless steel are used for the high vacuum KF and ISO viewports. TSL viewports are manufactured in cleanroom conditions and helium leak tested, cleaned and packed to UHV standards. The rugged construction of the zinc selenide viewports allows bake-out to a maximum of 120 °C with UHV performance, whilst the window offers broadband optical transmission to extreme infra-red.
Options with anti-reflective coatings are also offered. 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 TSL.
| Seal Type | Bond |
| Maximum Temperature | 120 °C |
| Minimum Temperature | -45 °C |
| Maximum Rate of Temperature Change | 3 °C per minute |
| Leak Rate | <1×10-10 atm-cc/sec (He) |
| Pressure Range | 1 bar to 1×10-9 mbar |
| Surface Quality | 60/40 scratch/dig |
| Flatness | <2λ |
