noun
mirror surface; lens surface
Refers to the reflective surface of a mirror or the polished surface of a lens. Often used in technical descriptions or when emphasizing a flawless, reflective finish.
鏡面のような湖に山が映っている。
The mountains are reflected in the mirror-like surface of the lake.
このレンズの鏡面は傷つきやすいので注意が必要だ。
The lens surface of this lens is easily scratched, so care is needed.