Illumination device and image scanning device

A lighting device, rod-shaped technology, applied in the direction of image communication, electrical components, etc., can solve the problems of long length, can not be used as a light source, etc., to achieve the effect of reducing interference

Inactive Publication Date: 2006-07-12
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, even if it is monochromatic, if the light intensity is insufficient, this part becomes a redundant area that cannot be used as a light source
[0013] In the prior art, the above-mentioned redundant area is very long, and as a lighting device, the length of the invalid part is very long
In addition, the structures disclosed in Patent Document 2 and Patent Document 3 cannot solve the above problems

Method used

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  • Illumination device and image scanning device
  • Illumination device and image scanning device
  • Illumination device and image scanning device

Examples

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Embodiment Construction

[0041] Embodiments of the present invention will be described below with reference to the accompanying drawings. figure 1 It is a cross-sectional view of an image reading device equipped with an illumination device of the present invention, figure 2 is an oblique view of the main part of the lighting device, image 3 It is an exploded oblique view of the main parts of the lighting device.

[0042]The image reading device has a recessed portion 1a and a recessed portion 1b formed in a frame (frame) 1, the upper surface of the recessed portion 1a is closed with a transparent top plate 2 on which a document is placed, and a rod-shaped light guide 3 is housed in a case 4. Line lighting The device 5 is obliquely fixed in the recess 1a, and the substrate 8 including the linear image sensor (photoelectric conversion element) 6 and its driving circuit 7 is installed in the recess 1b below, and further, the same magnification imaging is maintained in the frame body 1. Use a lens ar...

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PUM

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Abstract

To provide an illumination device with a short redundant area and to provide an image reading device incorporated with the illumination device. In light directly introduced into a bar-shaped light guide 3 from an end face of the light guide similarly in the conventional manner among light emitted from a blue element 10a located farthest from the bottom 3b of the light guide 3 in a light emitting element of a light emitting unit 10, a redundant area becomes ling as shown in ,(a). However, light transmitting a gap 13 among the light emitted from the blue element 10a is reflected on a rear face of a shielding section 14 to be introduced into the light guide 3 from the surface of a notch 12 as shown in (b). Since reflected light form the shielding section 14 is almost perpendicular, the redundant area becomes very short.

Description

technical field [0001] The present invention relates to an illumination device for illuminating a document, and an image reading device (image sensor) equipped with the illumination device. Background technique [0002] In facsimile machines, copiers, scanners, etc., an image reading device is installed, and the image reading device includes: an illuminating device incorporating a rod-shaped light guide that irradiates a linear light on an original; Lens array on a linear image sensor. [0003] Such as patent document 1 and Figure 12 As shown, the general structure of the above-mentioned illuminating device is that a rod-shaped light guide 101 is embedded in a U-shaped housing 100 in cross section, and the light from the light-emitting unit 102 installed at the end of the housing is guided from the end surface of the rod-shaped light guide 101 to the In the rod-shaped light guide, it is totally reflected in the rod-shaped light guide and emitted from the above-mentioned ex...

Claims

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Application Information

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IPC IPC(8): H04N1/028H04N1/04
Inventor 池田诚根本浩之岸本隆石丸刚志岩濑世彥竹内秀光齐藤富久
Owner NIPPON SHEET GLASS CO LTD
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