公开(公告)号：EP2813341A4

公开(公告)日：2015-10-28

申请号：EP13746350

申请日：2013-01-23

申请人： KONICA MINOLTA INC

发明人： NAITO ATSUSHI ,  TAKAGI HOROSHI ,  HARA SHINICHIRO ,  MAJIMA TOSHIYUKI ,  KANEKO NAOKI ,  ARAKAWA TAKAO

IPC分类号： G02B3/06 ,  B29C45/27 ,  B29L11/00 ,  G02B7/02

CPC分类号： G02B26/125 ,  B29C45/0025 ,  B29C45/2708 ,  B29C45/7207 ,  B29D11/00432 ,  B29K2995/0029 ,  B29L2011/0016 ,  B29L2031/764 ,  G02B1/041 ,  G02B3/06 ,  G02B26/123

摘要： The optical element is a long optical element obtained by detaching a long main body part connected to a runner part via a gate part including an optical part from the gate part and chipping the detached main body, the optical part including at least a first optical surface to allow light to pass therethrough or to reflect light. The first optical surface has a curved surface that is curved on the short direction at least at the longitudinal end, while the first edge of the first optical surface side on the end surface of gate part side in the main body part is curved according to the curved surface example of the first optical surface. The boundary surface between the main body part and the gate part is formed so as to be narrower than the end surface of the gate part side of the main body part. At least the distance between the site corresponding to the effective region on the first optical surface at the first edge and the site corresponding to the effective region on the first optical surface at the second edge of the first optical surface side on the boundary surface is uniformly formed.