The lenses are manufactured from a purified high-density polyethylene
Offer the best performance at frequencies below 1 THz and above 7 THz
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 this photo
|Model||Lens Type||Holder Diameter/
|PL-60||Bi-convex, spherical||2.75″ / 2″||60 mm|
|PL-100||Bi-convex, spherical||2.75″ / 2″||100 mm|
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).