fully reflecting mirror
/ˈfʊli ɹɪflˈɛktɪŋ ˈmɪɹə/
n
English · fully reflecting mirror中文 · 全反射镜Español · espejo de reflexión totalFrançais · miroir à réflexion totale
意味：Reflects all the light energy toward the partially reflecting mirror. The reflection between the mirrors intensifies the light to form a highly concentrated beam.