Light guide, illumination device, sensor unit, reading apparatus, image forming apparatus, and paper sheet distinguishing apparatus
AssigneeCanon Components, Inc.
InventorsYoshihiko Tsumekawa, Hidehisa Takahashi
Life of this patent
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Abstract
A first reflection light guide includes an axial part as an end part, and a main body part, has a linear rod-like shape including the end part and the main body part, and allows light from a first reflection light source to enter the end part and to be emitted from the main body part. The end part of the first reflection light guide is narrower than the main body part, and includes a contact surface in contact with a cap. The cap includes a light source side opening. A first reflection light source is arranged at the light source side opening. The first reflection light source faces the end part.
Claims21
A light guide that comprises an end part and a main body part, has a linear rod-like shape including the end part and the main body part, and allows light from a light source to enter the end part and to be emitted from the main body part,
- wherein the end part is narrower than the main body part,
- the end part has an end surface,
- a part of the end surface is a contact surface that is in contact with a positioning member,
- another part of the end surface is an incident surface which faces the light source, and
- the positioning member has an opening in which the light source is disposed.
Dependencies are inferred from the claim text.