VIEWPORTS
Magnesium Fluoride Viewports
Zero Length
VacTechniche fused silica viewports are offered in CF, ISO and KF flange styles. The viewports comprise a high purity laser quality fused silica optic with precise flatness, parallelism, scratch and dig specifications.
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 welds. The non-magnetic viewports use a non-magnetic weld ring instead of the regular kovar weld ring. Flanges in 316L stainless steel are used for the high vacuum KF and ISO viewports.
Description
Specifications
Cross Sections / Diagrams
PARTS & VARIATIONS
Description
Description
The rugged, bonded construction of the magnesium fluoride viewports allows bake-out to a maximum of 120°C with ultra high vacuum (UHV) performance whilst the window offers extended broadband optical transmission from deep UV to the infrared. Specially coated optics optimised to minimise reflectance at customer specified wavelength can be quoted on request.
Non-standard viewports can be manufactured on request, including reflentrant style microscope/camera viewports. Annealed copper gaskets and other component accessories are also supplied by VacTechniche.
Transmission Curve – Magnesium Fluoride
Specifications
Specifications
Seal Type | Bond |
Maximum Temperature | 120°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 1×10-9 mbar |
Surface quality | 60 /40 scratch/dig |
Flatness (prior to bonding) | λ/4 |
Cross Sections / Diagrams
Cross Sections / Diagrams
PARTS & VARIATIONS
PARTS & VARIATIONS
Part Number | Flange Type | OD mm | View Diameter mm | Optic Thickness mm | Flange Thickness mm | Flange Material | Weld Ring Material | Non-Magnetic |
BVPZ16MgF2 | NW16CF | 34 | 15 | 2.5 | 12.7 | 304L | 316L | |
BVPZ16MgF2-NM | NW16CF | 34 | 15 | 2.5 | 12.7 | 316LN | 316L Annealed | Yes |
BVPZ38MgF2 | NW35CF | 70 | 32 | 3 | 12.7 | 304L | 316L | |
BVPZ38LAMgF2 | NW35CF | 70 | 38 | 4 | 12.7 | 304L | 316L | |
BVPZ38MgF2-NM | NW35CF | 70 | 32 | 3 | 12.7 | 316LN | 316L Annealed | Yes |
BVPZ64MgF2 | NW63CF | 114 | 63 | 5 | 17.4 | 304L | 316L | |
BVPZ64MgF2-NM | NW63CF | 114 | 63 | 5 | 17.4 | 316LN | 316L Annealed | Yes |