Yeah, laser safe with optics is a real concern. Again IR might be useful here, for some frequencies only exotic materials are transparent like quartz, salt, tra

Yeah, laser safe with optics is a real concern. Again IR might be useful here, for some frequencies only exotic materials are transparent like quartz, salt, transparent aluminum. Using the lasers you could measure insect wing beat frequency to avoid killing non target insects. I believe I read that in an older paper about insect laser fences, maybe these authors ignored it because it's patented