UV radiation protection for space telescope FPA using cerium

We have designed and developed the UV radiation protection methodology for space optics by using Cerium absorption property and visible spectrum transmission improvement by multi-layer anti-reflection coating effect. The effect of thin film on the surface property of substrate is measured through wavefront error map and surface roughness. The wavefront error and surface roughness changes from 0.0124 λ to 0.0138 λ and RMS 0.8587 nm to RMS 0.8619 nm respectively, which shows no effect of the thin film coating on the substrate.