With the exception of fused silica or quartz all standard ‘lower cost’ UV-visible glasses react to gamma, neutron and x-ray radiation by turning dark. This means that if you are using a standard lens in areas where there is radiation in just weeks or a few months you will lose your image.

Considerations When Selecting Optics for Environments Subject to Radiation

Read Case Study: www.resolveoptics.com/selecting-a-lens/