公开(公告)号：EP1561132A1

公开(公告)日：2005-08-10

申请号：EP03769728.1

申请日：2003-11-03

申请人： Koninklijke Philips Electronics N.V. ,  Nalux Co. Ltd.

发明人： HATADE, Kouei ,  JUTTE, Petrus, T. ,  VAN DEN EERENBEEMD, Jacobus, M., A.

IPC分类号： G02B3/02 ,  G02B27/09 ,  G11B7/125

CPC分类号： G02B27/09 ,  G02B19/0014 ,  G02B19/0052 ,  G02B27/0955 ,  G02B27/0972 ,  G11B7/1376 ,  G11B7/1398

摘要： A beam-shaping optical element employing an aspherical profileis presented to minimize aberration. A beam-shaping optical element according to the present invention includes an entrance surface and the exit surface, both having a non-circular cross-section in any plane comprising the optical axis. A beam-shaping optical element according to one embodiment of the present invention, has the optical axis coinciding with the Z-axis of a three-axis rectangular XYZ system of coordinates, and the entrance surface and/or the exit surface represented by a mathematical equation comprising a term representing a non-rotationally symmetric aspherical profile, at least one correction term comprising a function of variable X alone and at least one correction term comprising a function of variable Y alone.

公开(公告)号：EP3460316A1

公开(公告)日：2019-03-27

申请号：EP17799265.8

申请日：2017-05-11

申请人： Stanley Electric Co., Ltd. ,  Nalux Co., Ltd.

发明人： KUROSU, Hiroaki ,  KINOSHITA, Kayuri ,  HATADE, Kouei ,  SAKAGAMI, Norihisa

IPC分类号： F21S8/12 ,  F21V5/04 ,  G02B13/00 ,  F21Y115/10

摘要： The present invention reduces colors that appear near light/dark boundaries without increasing the light intensity above a cut-off line. The projector-type headlamp comprises a projection lens and a light source unit. The projection lens includes two lenses. A diffraction grating is provided to at least part of the light source-side lens surface S3, which faces away from the light source. The light source-side surface S4, which faces the light source, has a positive power. The diffraction grating is designed to eliminate chromatic aberration. Where the intersection of the optical axis and a plane perpendicular to the optical axis is the point of origin, the direction horizontal to the plane is the x-axis, the direction vertical to the plane is the y-axis, R1 is the maximum y coordinate on the surface S3, and A is a constant greater than or equal to 0 and less than 1, an area of the surface S3 in which y