Fresnel lens | เลนส์เฟรสเนล [พลังงาน ๒๖ ม.ค. ๒๕๔๕] |
fresnel lens | (n) lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length |
Fresnel lens | [ See Fresnel lamp. ] (Optics) See under Lens. [ 1913 Webster ] |