Special Considerations for UV Lenses

Although UV lenses perform in a similar way to other lenses and are used in similar applications, there are some important considerations to keep in mind when working with UV optics. Scattering, dispersion effects, and laser damage and degradation are all important issues to be aware of when designing your UV setup. 

Scattering effects can occur anywhere on the spectrum, but they’re especially pronounced when working in UV. This is directly related to the short wavelengths of UV light, which makes it prone to scatter when meeting any inhomogeneity or scratch on a lens. To avoid scattering effects, you’ll want to make sure any UV lens has small parasitic birefringence, a homogenous refractive index, and the potential to be polished up very smoothly.  

Dispersion effects also depend on the spectral region and many substrates exhibit stronger chromatic dispersion in the UV range as contrasted with Vis and IR. Where this is a problem, achromatic optics can be used. 

Laser damage and degradation can be an issue as the optical damage threshold of substrates is often lower in the UV spectral range than  with longer wavelengths of light. This is because two-photon absorption can be enough to bridge the band gap. To avoid laser damage and degradation, ensure your UV lens is designed to be used with UV light and lasers, and ensure no vapors from lubrication oils get into intense ultraviolet beams.  

Specifications