公开(公告)号：US20160057308A1

公开(公告)日：2016-02-25

申请号：US14814667

申请日：2015-07-31

Applicant: KONICA MINOLTA, INC.

Inventor： Satoko TANAKA ,  Masahiko TANAKA

IPC: H04N1/028 ,  F21V8/00

CPC classification number: H04N1/02835 ,  G02B6/001 ,  G02B6/0018 ,  G02B6/0031 ,  G02B6/0038 ,  G02B6/0078 ,  H04N2201/0081 ,  H04N2201/02462

Abstract: A light guide has a guide portion extending in a first direction. Light entering the guide portion through a first end is guided to a reading position. The guide portion has prisms provided on a bottom surface to be arranged in the first direction, and a turn-back member configured to turn light coming to a second end of the guide portion back toward the first end. Each of the prisms includes a first total-reflecting surface facing to the first end and a second total-reflecting surface facing to the second end. With respect to at least one of the prisms located within an area extending parallel to the first direction from the second end toward the first end by a predetermined distance, the angle of the first total-reflecting surface to the bottom surface is greater than the angle of the second total-reflecting surface to the bottom surface.

Abstract translation: 光导具有沿第一方向延伸的引导部分。 通过第一端进入引导部分的光被引导到读取位置。 引导部分具有设置在沿第一方向布置的底表面上的棱镜，以及折回构件，其构造成将朝向第一端的导向部分的第二端的光转动。 每个棱镜包括面向第一端的第一全反射表面和面向第二端的第二全反射表面。 对于位于从第二端朝向第一端延伸预定距离的平行于第一方向延伸的区域内的至少一个棱镜，第一全反射面与底面的角度大于角度 的第二全反射面到底面。

公开(公告)号：US20150181070A1

公开(公告)日：2015-06-25

申请号：US14573318

申请日：2014-12-17

Applicant: Konica Minolta, Inc.

Inventor： Satoko TANAKA ,  Masahiko TANAKA

IPC: H04N1/028 ,  F21V8/00

CPC classification number: H04N1/02835 ,  G02B6/001

Abstract: A light guide for use in an image reading apparatus. The light guide extends in a predetermined direction and includes: a reflecting surface being parallel to the predetermined direction; an emitting surface; and a prism configured to reflect light to the emitting surface. The prism includes a plurality of asperities formed on the reflecting surface. When viewed from a first direction orthogonal to the reflecting surface, at least one of the plurality of asperities includes a portion parallel to a predetermined curve or a predetermined straight line inclined from a second direction orthogonal to the predetermined direction.

Abstract translation: 用于图像读取装置的光导。 导光体沿预定方向延伸，包括：平行于预定方向的反射表面; 发射面; 以及被配置为将光反射到所述发射表面的棱镜。 棱镜包括形成在反射表面上的多个凹凸。 当从与反射表面正交的第一方向观察时，多个凹凸中的至少一个包括平行于预定曲线的部分或从与预定方向正交的第二方向倾斜的预定直线。