Axicon lens element

plano-concaveconicalBK7

Plano-concave axicons are made of a plano surface in combination with a concave conical surface. They are made of optically transparent or filter materials with polished opposite sides, ground edges and chamfers. An axicon made up of conical and flat surface produces a line image along the axis from a point light source. Due to fabrications process, a central hole is needed for concave conical surface. Hole diameter is typically 2 mm. Different coatings can be applied on the polished sides of axicons. The concave conical surface can be used as a mirror axicon. Applications : Axicons are used to transform laser beams into line focus or to focus collimated beam into a ring. The latter can be used for laser material processing.