Natural z-cut quartz 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: 20/10 scratch/dig
Parallelism: < 3 arc minutes
Flange Material: CF version: 304L, 316LN
KF & ISO versions: 304L
Torr Scientific offers a wide range of natural z-cut quartz vacuum viewports in the Conflat® (CF), ISO or KF flange styles. These viewports are manufactured from a natural z-cut quartz optic and they are sealed by a bonding process.
Natural z-cut quartz viewports are widely utilised for a range of applications due to their excellent broadband optical transmission. Z-cut natural quartz is one of the best materials for transmission over 50 µm and due to its birefringence has transmission across both UV and IR within the ranges: 250nm to 3µm and from 50µm to 1000µm+.
Quartz is naturally birefringent, however there is a specific direction where light is not impacted by this characteristic. This direction is called the optic axis.
The optic axis is also known as the z axis, which is the reason for this viewport being referred to as “z-cut”. This manufacturing technique means that birefringence can be utilised when it is necessary, but at a normal incidence, beams of light will not be impacted by the birefringence.
Our natural z-cut quartz viewports are helium leak tested, cleaned and packed to UHV standards on site at Torr Scientific.
What are the properties of natural z-cut quartz?
- Naturally birefringent
- Optically transparent
- High resistance to laser damage
What are the uses of natural z-cut quartz viewports?
- Applications with an HeNe lasers
- Ultraviolet (UV) spectroscopy
- UV lithography
- THz windows
- Infrared (IR) spectroscopy
| CF (bonded) | KF (bonded) | ISO (bonded) | |
|---|---|---|---|
| Non-magnetic | ☑ | ☐ | ☐ |
| Large area (LA) | ☑ | ☐ | ☐ |
| Anti-reflective coating | ☑ | ☑ | ☑ |
| 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 |
Natural z-cut quartz transmission curve
Natural z-cut quartz 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.
*Note: This optic is only available bonded as it cannot withstand the temperatures required for brazing.
What AR coatings are available for natural z-cut quartz viewports?
- Z-cut natural quartz viewports are suitable for AR, VAR, WAR or BBAR coatings
- Coatings help to increase the transmission at specific wavelengths and reduce the reflections
- Transmission range of z-cut natural quartz: between 250nm to 3µm and 50µm to 1000µm+
Please enquire with our sales team and request a wavelength range to receive computer-generated AR transmission curve.
Compare the popular vacuum optics materials and their transmission
Downloadable PDF posters
Natural z-cut quartz is not for you?
Please see our other viewports, such as fused silica, Kodial borosilicate glass, sapphire,
magnesium fluoride (MgF2), calcium fluoride (CaF2), barium fluoride (BaF2),
zinc selenide (ZnSe), CVD diamond 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BVPZ16NQZ | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 304L | Kovar | λ/2 | 200°C | Drawing coming soon | BVPZ16NQZ Coming soon |
| BVPZ16NQZ-NM | NW16CF | 34 mm 1.33" | 15 mm 0.60" | 1.5 mm 0.06" | 316LN | Non-Magnetic | λ/2 | 200°C | Drawing coming soon | BVPZ16NQZ-NM Coming soon |
| BVPZ38NQZ | NW35CF | 70 mm 2.75" | 32 mm 1.26" | 3 mm 0.12" | 304L | Kovar | λ/2 | 200°C | Drawing coming soon | BVPZ38NQZ Coming soon |
| BVPZ38NQZ-NM | NW35CF | 70 mm 2.75" | 32 mm 1.26" | 3 mm 0.12" | 316LN | Non-Magnetic | λ/2 | 200°C | Drawing coming soon | BVPZ38NQZ-NM Coming soon |
| BVPZ38LANQZ | NW35CF | 70 mm 2.75" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | λ/2 | 200°C | Drawing coming soon | BVPZ38LANQZ Coming soon |
| BVPZ64NQZ | NW63CF | 114 mm 4.5" | 63 mm 2.49" | 4.5 mm 0.18" | 304L | Kovar | λ/2 | 200°C | Drawing coming soon | BVPZ64NQZ Coming soon |
| BVPZ64NQZ-NM | NW63CF | 114 mm 4.5" | 63 mm 2.49" | 4.5 mm 0.18" | 316LN | Non-Magnetic | λ/2 | 200°C | Drawing coming soon | BVPZ64NQZ-NM Coming soon |
| BVPZ100NQZ | NW100CF | 152 mm 6.0" | 89 mm 3.51" | 6 mm 0.24" | 304L | Kovar | λ/2 | 200°C | Drawing coming soon | BVPZ100NQZ Coming soon |
| BVPZ100NQZ-NM | NW100CF | 152 mm 6.0" | 89 mm 3.51" | 6 mm 0.24" | 316LN | Non-Magnetic | λ/2 | 200°C | Drawing coming soon | BVPZ100NQZ-NM 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BKVPZ16NQZ | KF16 | 30 mm 1.2" | 15 mm 0.60" | 1.5 mm 0.06" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BKVPZ16NQZ Coming soon |
| BKVPZ25NQZ-16LA | KF25 | 40 mm 1.60" | 15.5 mm 0.62" | 1.5 mm 0.06" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BKVPZ25NQZ-16LA Coming soon |
| BKVPZ40-32NQZ | KF40 | 55 mm 2.20" | 32 mm 1.26" | 3 mm 0.12" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BKVPZ40/32NQZ Coming soon |
| BKVPZ40NQZ | KF40 | 55 mm 2.20" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BKVPZ40NQZ Coming soon |
| BKVPZ50NQZ | KF50 | 75 mm 3.00" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BKVPZ50NQZ 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BISO63VPZNQZ | ISO63 | 95 mm 3.80" | 38 mm 1.50" | 3.5 mm 0.14" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BISO63VPZNQZ Coming soon |
| BISO100VPZNQZ | ISO100 | 130 mm 5.20" | 63 mm 2.49" | 4.5 mm 0.18" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BISO100VPZNQZ Coming soon |
| BISO160VPZNQZ | ISO160 | 180 mm 7.10" | 89 mm 3.51" | 6 mm 0.24" | 304L | Kovar | λ/2 | 150°C | Drawing coming soon | BISO160VPZNQZ Coming soon |
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