Optical viewports from novotek
Magnesium fluoride, germanium, EUV fused silica, KF and ISO-K
Where light or laser radiation has to enter or leave the vacuum chamber, the spectral range determines the window material. novotek, based in Magstadt near Stuttgart, manufactures optical viewports made of fused silica, sapphire, calcium fluoride, magnesium fluoride, zinc selenide and germanium.
This page lists the versions you will not find among the other viewports: magnesium fluoride for vacuum UV, germanium for infrared, EUV-grade fused silica and optical windows with KF or ISO-K flanges.
Materials
7 optical glasses
Flanges
CF, KF, ISO-K
Nominal diameters
NW16 to 250
Anti-reflection coating
Single-band or broadband
Features
- Magnesium fluoride with CF and KF flange, for applications down to vacuum UV
- Germanium with CF flange for infrared, such as thermal imaging and CO₂ lasers
- EUV-grade fused silica with CF or ISO-K flange
- optical windows with KF flange made of fused silica, sapphire, calcium fluoride, magnesium fluoride and zinc selenide
- optical windows with ISO-K flange up to NW250, made of fused silica in UV, DUV and EUV grade
- CF flanges made of stainless steel 1.4301, some versions also in 1.4429
- all windows with single-band or broadband anti-reflection coating, on request with a coating to your specifications
Materials and nominal diameters
| Material | Spectral range | CF | KF | ISO-K |
|---|---|---|---|---|
| Magnesium fluoride | Vacuum UV to infrared | NW16, 40, 63 | NW40, 50 | – |
| Germanium | Infrared (thermal imaging, CO₂ laser) | NW40, 63 | – | – |
| Fused silica, EUV grade | UV to near infrared | NW16 to 160 | – | NW63 to 160 |
| Fused silica, UV and DUV grade | UV to near infrared | NW16 to 200 | NW25 to 50 | NW63 to 250 |
| Calcium fluoride | UV to infrared | NW16, 40, 63 | NW40, 50 | – |
| Zinc selenide | Infrared | NW16 | NW40, 50 | – |
| Sapphire, UV grade | UV to mid-infrared | NW16 to 100 | NW25 to 50 | – |
Standard borosilicate viewports and windows made of sapphire, calcium fluoride, zinc selenide and crystal quartz with CF flanges can be found under Viewports.
Which window fits?
Wavelength, flange, nominal diameter and coating determine the version. We clarify this with you and novotek and also source special versions.