Hello. I want to build camera for ultraviolet photography and reflectography. I plan to use debayer'ed backlit CMOS camera with or without Wood's ZWB3 glass UV filter. But I also need to find infrared cut filter because abudant IR radiation will ruin photos. Problem is that there are plenty of hot mirrors which block not only infrared but also UV. I managed to find only one hot mirror that passes 365nm LED radiation that I scavenged from JVC gz mc100e older but high quality camcorder and it is small. I want to use same camera for infrared photography so putting it inside is not good option besides I'm not sure how far filter passes UV radiation. I know there are specialized only UV pass filters such as U-Venus Baader but they are expensive, rare and not so versatile. I want camera to see into ultraviolet as much as possible although since UV-C is blocked by air alone I'll be good with filter that allows fully UV-A and preferably UV-B spectrum. I'm curious what kind of materials are used to make hot mirrors and in particular those that pass UV radiation?