FRESNEL LENS


Meaning of FRESNEL LENS in English

noun Etymology: Augustin J. Fresnel Date: 1865 a lens that has a surface consisting of a concentric series of simple lens sections so that a thin lens with a short focal length and large diameter is possible and that is used especially for spotlights

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.