I just posted a whitepaper containing complete construction details for two DIY imagers for the shortwave ultraviolet band. These UV converters can be used for RUVIS and Solar-Blind imaging applications.
The blog post is at: http://uvirimaging.com/2016/07/03/diy-shortwave-uv-image-converters-for-solar-blind-and-ruvis-imaging/
and the whitepaper (a clean version of the post with high-res pictures) at: http://uvirimaging.com/wp-content/uploads/2016/07/Prutchi-diy-Shortwave-UV-Converters-and-cameras.pdf
For more diy UV photography and imaging projects, check out my new book: