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:
Jan. 14, 2020
Filed:
Jan. 17, 2018
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Taku Matsuzawa, Chiyoda-ku, JP;
Toru Shiraki, Chiyoda-ku, JP;
Hideki Kunishio, Chiyoda-ku, JP;
Daisuke Ohama, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Abstract
An objective of the present disclosure is to obtain a light guide and an image reading apparatus capable of efficiently irradiating an object to be irradiated (). The light guide and the image reading apparatus include a rod-shaped light guide main body () extending in the longitudinal direction, a first end face () that is an end face of the light guide main body () along the transverse direction, a light scattering pattern () that scatters light that enters from the first end face () and is guided inside the light guide main body (), and a light emission surface portion () formed on the light guide main body along a longitudinal direction, the light emission surface portion () being a surface from which the light scattered at the light scattering pattern () is emitted to outside the light guide main body () after being reflected on a wall surface of the light guide main body (). The light emission surface portion () includes a first light emission surface () that is disposed near the first end face () in the longitudinal direction and a second light emission surface () that is contiguous with the first light emission surface () in the longitudinal direction. A width of the first light emission surface () in the transverse direction is shorter than a width of the second light emission surface () in the transverse direction.