Vacuum Optics ❯ Viewports ❯ Magnesium fluoride (MgF2) zero-length viewports
Magnesium fluoride (MgF2) zero-length viewports
Seal Type: Bonded
Maximum Temperature: 120 °C
Minimum Temperature: -45 °C
Maximum Rate of Temperature Change: 3 °C per minute
Leak Rate: <1×10 -10 mbar L/s (He)
Pressure Range: 1 bar to 1×10-9 mbar
Surface Quality: 60/40 scratch/dig
Parallelism: < 3 arc minutes
Flange Material: CF version: 304L, 316LN
KF & ISO versions: 304L
Torr Scientific offers a wide range of magnesium fluoride (MgF2) vacuum viewports in the Conflat® (CF), ISO or KF flange styles. These viewports are manufactured from a magnesium fluoride optic and they are sealed by a bonding process.
Magnesium fluoride viewports are widely utilised for a range of applications due to their hardness and excellent broadband optical transmission. Ranging from vacuum ultraviolet (VUV) to near infrared (IR).
This optic is C-cut to minimise the slight levels of birefringence displayed by magnesium fluoride.
Our magnesium fluoride viewports are helium leak tested, cleaned and packed to UHV standards on site at Torr Scientific.
What are the properties of magnesium fluoride?
- Transmission into VUV (vacuum ultraviolet)
- Rugged material, resistant to thermal shock
- Able to be polished to high flatness
- Transparent with high optical clarity
What are the uses of magnesium fluoride viewports?
- Excimer laser applications
- UV optics
- UV spectroscopy
| CF (bonded) | CF (bonded) | KF (bonded) | ISO (bonded) | |
|---|---|---|---|---|
| Non-magnetic | ☐ | ☑ | ☐ | ☐ |
| Large area (LA) | ☑ | ☐ | ☐ | ☐ |
| 304L stainless steel flange | ☑ | ☐ | ☑ | ☑ |
| 316LN stainless steel flange | ☐ | ☑ | ☐ | ☐ |
| Our flanges may have a different name for you: | |||
|---|---|---|---|
| CF | DN | ICF | |
| KF | ISO-KF | NW | QF |
| ISO | LF | LFB | MF |
Magnesium fluoride transmission curve
Magnesium fluoride viewports: what are the further possibilities?
- Large area (LA) gives a wider view diameter.
- Non-standard options – standard products can be altered to customer requirements – contact sales to find out more.
Torr also offers accessories for viewports, such as annealed copper gaskets, viewport safety covers and bolts or clamps for KF or ISO flanges.
Compare the popular vacuum optics materials and their transmission
Downloadable PDF posters
Magnesium fluoride is not for you?
Please see our other viewports, such as fused silica, Kodial borosilicate glass, sapphire,
calcium fluoride (CaF2), barium fluoride (BaF2), zinc selenide (ZnSe),
CVD diamond or natural z‑cut quartz and more.
CF Viewports
| Part Number | Flange Type | Flange OD | View Diameter | Optic Thickness | Flange Material | Weld Ring Material | Flatness @ 632.8nm | Max Temp | Download 2D | Download STEP File |
|---|---|---|---|---|---|---|---|---|---|---|
| BVPZ16MGF2 | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 2.5 mm 0.10" | 304L | 316L | λ/4 | 120°C | Drawing coming soon | BVPZ16MGF2 Coming soon |
| BVPZ16MGF2-NM | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 2.5 mm 0.10" | 316LN | 316L | λ/4 | 120°C | Drawing coming soon | BVPZ16MGF2-NM Coming soon |
| BVPZ38MGF2 | NW35CF | 70 mm 2.75" | 32 mm 1.26" | 3 mm 0.12" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ38MGF2 Coming soon |
| BVPZ38MGF2-NM | NW35CF | 70 mm 2.75" | 32 mm 1.26" | 3 mm 0.12" | 316LN | 316L | 4λ | 120°C | Drawing coming soon | BVPZ38MGF2-NM Coming soon |
| BVPZ38LAMGF2 | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 4 mm 0.16" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ38LAMGF2 Coming soon |
| BVPZ64MGF2 | NW63CF | 114 mm 4.5" | 63 mm 2.49" | 5 mm 0.20" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ64MGF2 Coming soon |
| BVPZ64MGF2-NM | NW63CF | 114 mm 4.5" | 63 mm 2.49" | 5 mm 0.20" | 316LN | 316L | 4λ | 120°C | Drawing coming soon | BVPZ64MGF2-NM Coming soon |
| BVPZ100MGF2 | NW100CF | 152 mm 6.0" | 89 mm 3.51" | 6.5 mm 0.26" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ100MGF2 Coming soon |
| BVPZ100MGF2-NM | NW100CF | 152 mm 6.0" | 89 mm 3.51" | 6.5 mm 0.26" | 316LN | 316L | 4λ | 120°C | Drawing coming soon | BVPZ100MGF2-NM Coming soon |
| BVPZ150MGF2 | NW150CF | 203 mm 8.0" | 136 mm 5.36" | 9.5 mm 0.38" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ150MGF2 Coming soon |
| BVPZ150MGF2-NM | NW150CF | 203 mm 8.0" | 136 mm 5.36" | 9.5 mm 0.38" | 316LN | 316L | 4λ | 120°C | Drawing coming soon | BVPZ150MGF2-NM Coming soon |
| BVPZ200MGF2 | NW200CF | 254 mm 10.0" | 136 mm 5.36" | 9.5 mm 0.38" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BVPZ200MGF2 Coming soon |
KF Viewports
| Part Number | Flange Type | Flange OD | View Diameter | Optic Thickness | Flange Material | Weld Ring Material | Flatness @ 632.8nm | Max Temp | Download 2D | Download STEP File |
|---|---|---|---|---|---|---|---|---|---|---|
| BKVPZ16MGF2 | KF16 | 30 mm 1.2" | 15 mm 0.60" | 2.5 mm 0.10" | 304L | 316L | λ/4 | 120°C | Drawing coming soon | BKVPZ16MGF2 Coming soon |
| BKVPZ25MGF2-16LA | KF25 | 40 mm 1.60" | 15.5 mm 0.62" | 2.5 mm 0.10" | 304L | 316L | λ/4 | 120°C | Drawing coming soon | BKVPZ25MGF2-16LA Coming soon |
| BKVPZ40-32MGF2 | KF40 | 55 mm 2.20" | 32 mm 1.26" | 3 mm 0.12" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BKVPZ40/32MGF2 Coming soon |
| BKVPZ40MGF2 | KF40 | 55 mm 2.20" | 38 mm 1.50" | 4 mm 0.16" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BKVPZ40MGF2 Coming soon |
| BKVPZ50MGF2 | KF50 | 75 mm 3.00" | 38 mm 1.50" | 4 mm 0.16" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BKVPZ50MGF2 Coming soon |
ISO Viewports
| Part Number | Flange Type | Flange OD | View Diameter | Optic Thickness | Flange Material | Weld Ring Material | Flatness @ 632.8nm | Max Temp | Download 2D | Download STEP File |
|---|---|---|---|---|---|---|---|---|---|---|
| BISO63VPZMGF2 | ISO63 | 95 mm 3.80" | 38 mm 1.50" | 4 mm 0.16" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BISO63VPZMGF2 Coming soon |
| BISO100VPZMGF2 | ISO100 | 130 mm 5.20" | 63 mm 2.49" | 5 mm 0.20" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BISO100VPZMGF2 Coming soon |
| BISO160VPZMGF2 | ISO160 | 180 mm 7.10" | 89 mm 3.51" | 6.5 mm 0.26" | 304L | 316L | 4λ | 120°C | Drawing coming soon | BISO160VPZMGF2 Coming soon |
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