JP2011139201A5

JP2011139201A5 -

Info

Publication number: JP2011139201A5
Application number: JP2009296770A
Authority: JP
Filing date: 2009-12-28
Publication date: 2012-02-09
Anticipated expiration: 2029-12-28

Description

請求項１記載のライン状照明装置は、基板と、前記基板上に直線状に配置された複数の光源と、反射鏡と、直線状に配置された複数の前記光源に沿って配置された導光体であって、前記光源からの光が入光する、前記光源の照射面に対して平行に設けられた第１の平面部と、前記第１の平面部に対して傾いて設けられた第２の平面部と、を有する入光面と、前記第１の平面部に対して傾いて設けられた反射面と、を有し、前記第１の平面部を透過した光の一部である第１の光束を前記反射鏡に向けて出射し、前記第２の平面部を透過した光と、前記第１の平面部を透過して前記反射面で反射した光とを合わせた第２の光束を原稿に向けて出射する出射面と、を有する前記導光体と、を有し、前記光源を前記基板上に配置した状態において、前記反射面と前記出射面との交線は、前記第１の平面部と前記第２の平面部との交線よりも低くし、かつ、前記反射鏡は前記第１の光束を前記第２の光束と交差する方向に向けて反射するように構成していることを特徴とする。
The linear illumination device according to claim 1 is a substrate, a plurality of light sources arranged linearly on the substrate, a reflecting mirror, and a light guide arranged along the plurality of light sources arranged linearly. A first planar portion provided in parallel to an irradiation surface of the light source, on which light from the light source is incident, and an inclined body with respect to the first planar portion. A light incident surface having a second planar portion, and a reflection surface provided to be inclined with respect to the first planar portion, and a part of the light transmitted through the first planar portion. A second light beam that is emitted from a first light beam toward the reflecting mirror and is transmitted through the second plane part and light that is transmitted through the first plane part and reflected by the reflecting surface. of a an exit surface for emitting toward the light beam on the document, said light guide having a, in a state where the light source was disposed on the substrate, before Line of intersection between the reflecting surface and the exit surface, the first as the plane portion lower than the intersection line between the second flat portion, and said reflector of the first light flux and the second It is configured to reflect in a direction intersecting with the light beam.

請求項３記載の画像読取装置は、原稿からの反射光を読み取る画像読取装置であって、基板と、前記基板上に直線状に配置された複数の光源と、反射鏡と、直線状に配置された複数の前記光源に沿って配置された導光体であって、前記光源からの光が入光する、前記光源の照射面に対して平行に設けられた第１の平面部と、前記第１の平面部に対して傾いて設けられた第２の平面部と、を有する入光面と、前記第１の平面部に対して傾いて設けられた反射面と、を有し、前記第１の平面部を透過した光の一部である第１の光束を前記反射鏡に向けて出射し、前記第２の平面部を透過した光と、前記第１の平面部を透過して前記反射面で反射した光とを合わせた第２の光束を原稿に向けて出射する出射面と、を有する前記導光体と、を有し、前記光源を前記基板上に配置した状態において、前記反射面と前記出射面との交線は、前記第１の平面部と前記第２の平面部との交線よりも低くし、かつ、前記反射鏡は前記第１の光束を前記第２の光束と交差する方向に向けて反射するように構成しているライン状照明装置と、前記ライン状照明装置からの光を受光素子上に結像する結像レンズと、前記受光素子によって受光した反射光を信号に変換して画像信号として出力する画像読取部と、を備えたことを特徴とする。 4. The image reading apparatus according to claim 3, wherein the image reading apparatus reads reflected light from a document, and the substrate, a plurality of light sources arranged linearly on the substrate, a reflecting mirror, and linearly arranged. A light guide disposed along the plurality of light sources, wherein the light from the light source is incident on the first planar portion provided in parallel to the irradiation surface of the light source; and A light incident surface having a second plane portion provided to be inclined with respect to the first plane portion, and a reflection surface provided to be inclined with respect to the first plane portion, A first light beam, which is a part of the light transmitted through the first plane part, is emitted toward the reflecting mirror, and the light transmitted through the second plane part and the first plane part are transmitted. anda light guide body having a emission surface that emits toward the second beam obtained by combining the light reflected by the reflection surface on the document, before In a state where the light source was disposed on the substrate, line of intersection between the reflecting surface and the exit surface is to be lower than the intersection line between said first planar portion and the second flat portion, and the reflection The mirror is configured to reflect the first light flux in a direction intersecting the second light flux, and forms an image of light from the line illumination device on a light receiving element. An imaging lens and an image reading unit that converts reflected light received by the light receiving element into a signal and outputs the signal as an image signal are provided.

Claims

A substrate,
A plurality of light sources arranged linearly on the substrate;
・ Reflector,
A light guide disposed along a plurality of the light sources arranged in a straight line, the first light guide being provided parallel to the irradiation surface of the light source into which light from the light source enters. A light incident surface having a plane portion and a second plane portion provided to be inclined with respect to the first plane portion; a reflection surface provided to be inclined with respect to the first plane portion; A first light beam that is a part of the light transmitted through the first flat surface portion is emitted toward the reflecting mirror, the light transmitted through the second flat surface portion, and the first flat surface. An exit surface that emits a second light flux that is combined with the light transmitted through the portion and reflected by the reflection surface toward the document, and
Have
-In a state where the light source is arranged on the substrate, an intersection line between the reflection surface and the emission surface is lower than an intersection line between the first plane portion and the second plane portion , and The line illuminating device according to claim 1, wherein the reflecting mirror is configured to reflect the first light beam toward a direction intersecting the second light beam.

The reflective surface has a light incident surface side reflective surface provided on the light incident surface side, and an output surface side reflective surface provided on the output surface side,
The intersection line of the said output surface side reflective surface and the said output surface is the same height as the intersection line of the said light-incidence surface side reflective surface and the said output surface side reflective surface. Line lighting equipment.

An image reading device for reading reflected light from a document,
(A) a substrate;
A plurality of light sources arranged linearly on the substrate;
・ Reflector,
A light guide disposed along a plurality of the light sources arranged in a straight line, the first light guide being provided parallel to the irradiation surface of the light source into which light from the light source enters. A light incident surface having a plane portion and a second plane portion provided to be inclined with respect to the first plane portion; a reflection surface provided to be inclined with respect to the first plane portion; A first light beam that is a part of the light transmitted through the first flat surface portion is emitted toward the reflecting mirror, the light transmitted through the second flat surface portion, and the first flat surface. An exit surface that emits a second light flux that is combined with the light transmitted through the portion and reflected by the reflection surface toward the document, and
Have
-In a state where the light source is arranged on the substrate, an intersection line between the reflection surface and the emission surface is lower than an intersection line between the first plane portion and the second plane portion , and A line illuminating device configured to reflect the first light beam in a direction intersecting the second light beam;
(B) an imaging lens for imaging the reflected light from the document on a light receiving element;
(C) an image reading unit that converts the reflected light received by the light receiving element into a signal and outputs the signal as an image signal;
An image reading apparatus comprising:

The reflective surface of the linear illumination device has a light incident surface side reflective surface provided on the light incident surface side and an output surface side reflective surface provided on the output surface side,
The intersection line of the said output surface side reflective surface and the said output surface is the same height as the intersection line of the said light-incidence surface side reflective surface and the said output surface side reflective surface. Image reading apparatus.