UNCOOLED LWIR LENSES CAN BE FUN FOR ANYONE

In the look approach, on The idea of aspheric technique, the aspheric area was provided more levels for being further optimized being freeform surface lens. Even though the method shed rotational symmetry, the aircraft symmetry is managed.This technique includes four lenses. Just one diffractive lens on L1 and a single conical area on L2 are accust