Vacuum Optics ❯ Viewports ❯ Sapphire Zero Length Viewports
Sapphire Zero Length Viewports
200 °C sapphire viewport
Seal Type: Braze
Maximum Temperature: CF version: 200 °C, KF & ISO versions: 150 °C
Minimum Temperature: -20 °C
Maximum Rate of Temperature Change: 3 °C per minute
Leak Rate: <1×10 -10 mbar L/s (He)
Pressure Range:
1 bar to 1×10-11 mbar
Surface Quality: 60/40 scratch/dig
Parallelism: < 3 arc minutes
Flange Material:
CF Version: 304L, 316LN
KF & ISO versions: 304L
300 °C sapphire viewport
(DN16CF and DN40CF flange only)
Seal Type: Braze
Maximum Temperature: 300 °C
Minimum Temperature: -20 °C
Maximum Rate of Temperature Change: 3 °C per minute
Leak Rate: <1×10 -10 mbar L/s (He)
Pressure Range: 1 bar to 1×10-11 mbar
Surface Quality: 60/40 scratch/dig
Parallelism: < 3 arc minutes
Flange Material: 304L, 316LN
Torr Scientific offers a wide range of sapphire vacuum viewports in the Conflat® (CF), ISO or KF flange styles. These viewports are manufactured from a sapphire optic and they are sealed by a brazing procedure
Sapphire viewports are regularly requested for their ability to endure repeated bakeouts at high temperatures to achieve ultra-high vacuum (UHV). They are widely utilised for a range of applications due to their excellent qualities such as clarity, hardness and excellent broadband optical transmission from ultraviolet (UV) to near infrared (IR).
Our sapphire viewports are helium leak tested, cleaned, and packed to UHV standards on site at Torr Scientific.
What are the properties of sapphire?
- Excellent optical, physical and chemical properties
- Low fluorescence
- Good resistance to thermal shock and scratching
- Works well at high temperatures
- Transparent with high optical clarity
What are the uses of sapphire viewports?
Observations into the chambers:
- Laser applications between ultraviolet (UV) to near infrared (IR)
- Spectroscopy at high temperatures and high vacuum levels
- Observations into the chamber
- E.g., measurements and photography
| 300 °C (brazed) | 200 °C (brazed) | 200 °C (brazed) | 200 °C (brazed) | |
|---|---|---|---|---|
| Flange style | CF | CF | KF | ISO |
| Non-magnetic | ☑ | ☐ | ☐ | ☐ |
| Large area (LA) | ☑ | ☑ | ☐ | ☐ |
| Anti-reflective coating | ☑ | ☑ | ☑ | ☑ |
| Our flanges may have a different name for you: | |||
|---|---|---|---|
| CF | DN | ICF | |
| KF | ISO-KF | NW | QF |
| ISO | LF | LFB | MF |
Sapphire transmission curve
Sapphire 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.
What AR coatings are available for sapphire viewports?
Anti-reflective (AR)
- Sapphire viewports are suitable for AR, VAR, WAR or BBAR coatings
- Coatings help to increase the transmission at customer specified wavelengths and reduce reflection
- Transmission range of sapphire: ultraviolet (UV) to near infrared (IR)
Please enquire with our sales team and request a wavelength range to receive a computer-generated coating transmission curve.
Compare the popular vacuum optics materials and their transmission
Downloadable PDF posters
Sapphire is not for you?
Please see our other viewports, such as fused silica, Kodial borosilicate glass,
magnesium fluoride (MgF2), 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| VPZ16S | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 304L | Kovar | 8λ | 300°C | Drawing coming soon | VPZ16S Coming soon |
| VPZ16S-LN | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 316LN | Kovar | 8λ | 300°C | Drawing coming soon | VPZ16S-LN Coming soon |
| VPZ16S-NM | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ16S-NM Coming soon |
| VPZ16S-200 | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ16S-200 Coming soon |
| VPZ16S-LN-200 | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ16S-LN-200 Coming soon |
| VPZ16S-NM-200 | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ16S-NM-200 Coming soon |
| VPZ38S-LN | NW35CF | 70 mm 2.75" | 32 mm 1.30" | 1.5 mm 0.06" | 316LN | Kovar | 8λ | 300°C | Drawing coming soon | VPZ38S-LN Coming soon |
| VPZ38S-NM | NW35CF | 70 mm 2.75" | 32 mm 1.30" | 1.5 mm 0.06" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ38S-NM Coming soon |
| VPZ38LAS | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | 8λ | 300°C | Drawing coming soon | VPZ38LAS Coming soon |
| VPZ38LAS-LN | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 3.5 mm 0.14" | 316LN | Kovar | 8λ | 300°C | Drawing coming soon | VPZ38LAS-LN Coming soon |
| VPZ38S-200 | NW35CF | 70 mm 2.75" | 32 mm 1.30" | 1.5 mm 0.06" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ38S-200 Coming soon |
| VPZ38LAS-200 | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ38LAS-200 Coming soon |
| VPZ38S-LN-200 | NW35CF | 70 mm 2.75" | 32 mm 1.30" | 1.5 mm 0.06" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ38S-LN-200 Coming soon |
| VPZ38LAS-LN-200 | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 3.5 mm 0.14" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ38LAS-LN-200 Coming soon |
| VPZ38S-NM-200 | NW35CF | 70 mm 2.75" | 32 mm 1.30" | 1.5 mm 0.06" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ38S-NM-200 Coming soon |
| VPZ64S-200 | NW63CF | 114 mm 4.5" | 63 mm 2.50" | 2.0 mm 0.08" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ64S-200 Coming soon |
| VPZ64S-LN-200 | NW63CF | 114 mm 4.5" | 63 mm 2.50" | 2.0 mm 0.08" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ64S-LN-200 Coming soon |
| VPZ64S-NM-200 | NW63CF | 114 mm 4.5" | 63 mm 2.50" | 2.0 mm 0.08" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ64S-NM-200 Coming soon |
| VPZ100S-200 | NW100CF | 152 mm 6.0" | 89 mm 3.60" | 2.5 mm 0.10" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ100S-200 Coming soon |
| VPZ100S-LN-200 | NW100CF | 152 mm 6.0" | 89 mm 3.60" | 2.5 mm 0.10" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ100S-LN-200 Coming soon |
| VPZ100S-NM-200 | NW100CF | 152 mm 6.0" | 89 mm 3.60" | 2.5 mm 0.10" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ100S-NM-200 Coming soon |
| VPZ150S-200 | NW150CF | 203 mm 8.0" | 136 mm 5.40" | 4.0 mm 0.15" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ150S-200 Coming soon |
| VPZ150S-LN-200 | NW150CF | 203 mm 8.0" | 136 mm 5.40" | 4.0 mm 0.15" | 316LN | Kovar | 8λ | 200°C | Drawing coming soon | VPZ150S-LN-200 Coming soon |
| VPZ150S-NM-200 | NW150CF | 203 mm 8.0" | 136 mm 5.40" | 4.0 mm 0.15" | 316LN | Non-magnetic | 8λ | 200°C | Drawing coming soon | VPZ150S-NM-200 Coming soon |
| VPZ200S-200 | NW200CF | 254 mm 10.0" | 136 mm 5.40" | 9.5 mm 0.37" | 304L | Kovar | 8λ | 200°C | Drawing coming soon | VPZ200S-200 Coming soon |
(*) – Note flatness of optic given before brazing.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| KVPZ16S-200 | KF16 | 30 mm 1.2" | 15 mm 0.60" | 1.5 mm 0.06" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | KVPZ16S-200 Coming soon |
| KVPZ25S-200 | KF25 | 40 mm 1.60" | 15.5 mm 0.62" | 1.5 mm 0.06" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | KVPZ25S-200 Coming soon |
| KVPZ40-32S-200 | KF40 | 55 mm 2.20" | 32 mm 1.26" | 3 mm 0.12" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | KVPZ40/32S-200 Coming soon |
| KVPZ40S-200 | KF40 | 55 mm 2.20" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | KVPZ40S-200 Coming soon |
| KVPZ50S-200 | KF50 | 75 mm 3.00" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | KVPZ50S-200 Coming soon |
(*) – Note flatness of optic given before brazing.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ISO63SVPZ-200 | ISO63 | 95 mm 3.80" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | ISO63SVPZ-200 Coming soon |
| ISO100SVPZ-200 | ISO100 | 130 mm 5.20" | 63 mm 2.49" | 4.5 mm 0.18" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | ISO100SVPZ-200 Coming soon |
| ISO160SVPZ-200 | ISO160 | 180 mm 7.10" | 89 mm 3.51" | 6 mm 0.24" | 304L | Kovar | 8λ | 150°C | Drawing coming soon | ISO160SVPZ-200 Coming soon |
(*) – Note flatness of optic given before brazing.
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