The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2016
Filed:
Jul. 31, 2015
Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;
Satoko Tanaka, Toyokawa, JP;
Masahiko Tanaka, Toyokawa, JP;
KONICA MINOLTA, INC., Chiyoda-Ku, Tokyo, JP;
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.