THz Lens

The materials with better terahertz transmittance are mainly polymer materials and high-resistance silicon, of which high-resistance silicon has a high refractive index and is more suitable for lens materials. Among the polymer materials, TPX has the best performance in terahertz transmission, but the optical grade TPX material is expensive due to the high shrinkage ratio during pressure injection molding and the low yield of the profile. At present, terahertz window materials are generally selected from polytetrafluoroethylene, high-density polyethylene, TPX, and high-resistance silicon, which are also the main materials for THz Lens.

There are many types of THz Lenses, the main common ones are plano-convex aspherical lenses (most of the lenses in Menlo are of this kind at present), conical lenses (used to produce Bessel beams), spiral phase plates, column lenses, multi-hemisphere lenses, Fresnel lenses in order to reduce the thickness, etc. The role of terahertz lenses in terahertz spectrometers and imagers is generally a quasi-direct focusing role or reverse trial.

THz lens are available in apertures from 25-50 and focal lengths from 10-200mm, with standard parts in stock. TPX lenses can be customized with other parameters.

Features of THz lens:

– TPX, HDPE, HRSi materials available

– Different standard sizes 1inch, 1.5 inch, 2 inch

– Various focal lengths available for customer selection

– High transmittance, high flatness

– Customized service available

Standard product of THz lens：