Polished Tsurupica Lenses

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.

Ordering Information:

Model Lens Type External Diameter/
Clear Aperture
Focal Length
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

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).

Polarization Rotator

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