公开(公告)号：EP3215309A4

公开(公告)日：2018-07-04

申请号：EP14905348

申请日：2014-11-04

申请人： INASCO ASBESTOS CONVERTING AB

发明人： HÖGBERG KNYAZ RIKARD EMANUEL ,  STOLYAROV YURI VIKTOROVICH

IPC分类号： B23K26/064 ,  G02B9/12 ,  G02B13/18 ,  G02B19/00

CPC分类号： B23K26/064 ,  G02B9/12 ,  G02B13/18 ,  G02B19/0014 ,  G02B19/0047

摘要： A system for focusing of a high energy laser at an extended distance. Particularly, an optical system that includes a first lens element that has a first surface and a second surface, where the first surface is concave and the second surface is convex, a second lens element that has a first surface and a second surface, where the first surface is flat and the second surface is concave, a third lens element that has a first surface and a second surface, where the first surface is flat and the second surface is convex and where the distance between the second lens element and the third lens element is larger than the distance between the first lens element and the second lens element.