The best choosing of lens- material that used for medical purpose by U.V ray

This research wark is interested in studying UV-grade synthetic fused silica (UVGSFS)(l )the effeciency of this material in formed the image in deep ultraviolet spectrum by means of evaluated line spread function (LSF) and cumulative line spread function (CLSF) for perfect optical system at wave length 302 nm and 1500 nm becose the first is used for amedical treatment (2) like rickets and second wave length is employed to sterilize the surgical operations room the ultraviolet rays having high energy compared with infrared and visible rays