THz Lenses & Windows
Microtech offers a variety of lenses and windows for THz applications including:
• Polished Tsurupica Windows
• Polished Tsurupica Lenses
•
Polyethylene Lenses
Download THz Lenses & Windows Datasheet (PDF, 185 KB)
Polished Tsurupica Windows
Apart from high transparency in THz and visible spectral ranges, Tsurupica is also very strong mechanically. Thin Tsurupica windows can be used in cryostats, gas cells or any other systems operating at high pressure.
Ordering Information
| PTW-1" -3mm |
1" (25.4 mm) / 3 mm |
| PTW-1.5"-4mm |
1.5" (38.1 mm) / 4 mm |
| PTW-2"-4mm |
2" (50 mm) / 4 mm |
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Polished Tsurupica Lenses focus THz and visible light
Unique properties of Tsurupica make this possible:
- Tsurupica is highly transparent in THz and visible spectral ranges (see transmission spectra below).
- Refractive index of Tsurupica is the same for THz and visible light (n=1.52).
- It withstands optical polishing.
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Ordering Information
| PTL-1.5"-50mm-AS |
Plano-convex, aspheric |
1.5" / 30 mm |
50 mm |
| PTL-1.5"-100mm-AS |
Plano-convex, aspheric |
1.5" / 30 mm |
100 mm |
| PTL-2" -50mm-BC |
Bi-convex, spherical |
2" / 45 mm |
50 mm |
| PTL-2"-100mm-BC |
Bi-convex, spherical |
2" / 45 mm |
100 mm |
| PTL-2"-180mm |
Plano-convex, spherical |
2" / 45 mm |
180 mm |
| PTL-1.5"-XXXmm |
Plano-convex, spherical |
1.5" / 30 mm |
Any > 30 mm |
| PTL-2"-XXXmm |
Plano-convex, spherical |
2" / 45 mm |
Any > 50 mm |
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Polyethylene Lenses
- The lenses are manufactured from a purified high-density polyethylene
- Offer the best performance at frequencies below 1 THz and above 7 THz (see transmission spectra below)
- Polyethylene is not transparent in visible and near-IR spectral ranges, so that the lenses can be used to block light.
- Polyethylene Lenses are sold mounted in a metal holder, as shown in the photo to the right.
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Ordering Information
| PL-60 |
Bi-convex, spherical |
2.75" / 2" |
60 mm |
| PL-100 |
Bi-convex, spherical |
2.75" / 2" |
100 mm |
Transmission Spectra of Tsurupica and Polyethylene
The transmission spectra were measured for 2 mm thick slabs which corresponds to an average thickness of a lens (50 mm diameter, 100 mm focal length)
Pricing information is available on request at sales@mtinstruments.com
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