X-ray irradiation response of antireflection coatings

In the domain of imaging in harsh environments, adding antireflection coatings on lenses increases the flux on the sensor and minimizes the ghost images. However, the radiation can influence the performances of these coatings. In this paper, we studied such effects on commercially available antireflection coatings, up to the total ionizing dose of 1 MGy(SiO2). Online radiation-induced attenuation measurements highlight slight differences between uncoated and coated samples that are not clearly observable in post-mortem transmission and reflection spectra. We also report photoluminescence spectra.