To provide a lighting system which has less reflected light even under a very high intensity illumination system such as surgical operation or dental treatmentA transparent facial protection optical element having a lightweight and anti-fog performance is provided.SOLUTION: The face protecting optical element 1 has, on both surfaces of a flexible transparent base material (substrate 11)And has a plurality of structures 12 at a pitch equal to or less than the wavelength of visible light. The structure 12 has a hydrophilic functional groupAnd is formed of a cured resin material.BACKGROUND OF THE INVENTION【課題】外科手術時や歯科治療時等の非常に強度の高い照明システム下でも反射光が少なく、かつ防曇性能を持つ透明な顔面保護用光学素子を提供する。【解決手段】顔面保護用光学素子1は、可撓性を有する透明基材(基体11)の両面に、可視光の波長以下のピッチで複数の構造体12を有する。構造体12は、親水性官能基を有する樹脂硬化物で形成されている。【選択図】図1
