Stainless steel beam expanders specifically for UV applications

15. January 2018

UV lasers become increasingly popular among various domains in the laser industry.

To support this triumphal procession, Sill Optics is presenting innovations on a regular basis, satisfying wishes and requirements.

Comprehensive analysis with our customers showed that UV lasers admittedly offer many advantages via their short wavelengths and the associated high photon energy, but takes a toll on the optical elements. Besides challenges at glass selection and preferably low absorbing coatings, this statement is also true for the mechanical parts.
A long-term exposure to UV irradiation leads to bleaching of the typically black anodized aluminum housing. The light absorbing effect therefore vanishes. Additionally residues of redundant substances may lower transmission or increase the risk of damage due to deposition on top of lens elements.

For that reason it is possible to order resilient stainless steel versions for both custom orders and catalog products. As an example we present our beam expanders that are often one of the first optical elements after the laser and therefore exposed to higher amounts of scattering irradiation.

The capabilities of Sill Optics regarding material of lens housings does not end at stainless steel. On demand, mountings made of titanium or Invar (64FeNi) are also possible, for example offering advantages in applications with large temperature variations.