Abstract

Hafnia is the high index material of choice for ultra violet optical coatings. However, not all UV devices need the full window of transparency of hafnia and could benefit from the availability of higher index materials, particularly in the area of high performance filters. One example is the demanding requirement for bandpass filters operating in the solar blind region of the UV , where devices with a transmission band of 260-300 nm coupled with rejection levels to greater than OD10 are needed.

© 1998 Optical Society of America