JPH02112374A - Picture reader - Google Patents

Abstract

PURPOSE:To obtain the picture of high quality from both a reflected type original and a transmissive original by constituting a picture reader with a reflection illuminating means, a transmissive illuminating means, an optical path changing means, which adjusts the optical path of a transmissive illuminating light and guides it to the optical path of a reflection illuminating light, and a reflection body. CONSTITUTION:A picture reading means 108 is provided to read a reflection illuminating light L2 which is outputted from a reflection illuminating means 130 and reflected in an oblique direction to the reflected type original. Optical path transforming means 102 and 104 are provided to diffract a transmission illuminating light L1, which is outputted from a transmission illuminating means 83 and passed in an almost perpendicular direction to the transmittent type original, and to guide the light into the optical path of the reflection illuminating light L2. Then, a reflection body 106 is provided to make the transmissive illuminating light L1, which is guided from the optical path changing means 102 and 104, incident on a picture reading means 104. Thus, even from either the reflected type original or transmissive original, the picture of the high quality can be obtained without using the picture reading means of the high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an image reading device, and more particularly, it uses reflected illumination light outputted from a reflective illumination means and reflected obliquely to a reflective original. an image reading means for reading; an optical path converting means for refracting the transmitted illumination light outputted from the transmitted illumination means and passing approximately perpendicularly to the transmission type document and guiding it into the optical path of the reflected illumination light; and the optical path changing means A reflector is provided to make the transmitted illumination light derived from the image reading means enter the image reading means, and when reading a reflective type original, it is possible to reproduce an image with high quality and accuracy without surface reflections, pasting marks, etc. The present invention relates to an image reading device that is capable of obtaining a high-quality image by avoiding an increase in the apparent density of a transmissive original when reading a transmissive original.

[Background of the invention] For example, in the field of printing plate making, streamlining of work processes,
2. Description of the Related Art Image scanning, reading and reproducing systems that electrically process image information carried on a document to create a film original are widely used for the purpose of improving image quality.

An image scanning reading and reproducing system basically consists of an image reading device and an image reproducing device. .

In this case, the image reading device illuminates the document being conveyed in the sub-scanning direction in the main scanning direction using illumination means, and the image reading means reads the reflected light or transmitted light and converts it into an electrical signal. On the other hand, the image reproducing device performs arithmetic processing such as gradation correction and edge enhancement according to plate-making conditions on the image information photoelectrically converted by the image reading device, and records and reproduces the image on a record carrier such as film. Note that this recording carrier is developed by a predetermined developing device and used as a film original for printing or the like.

Incidentally, there are two types of image reading apparatus: one type that irradiates illumination light from a light source onto a document being conveyed in the sub-scanning direction and photoelectrically reads the reflected light, and the other type that reads transmitted light.

In general, this type of image reading device is divided into two types: a transmitted light type that reads image information carried on a transparent film, etc., and a reflected light type that reads image information on printed materials, etc., depending on the use and purpose. It is manufactured separately, and the types of documents that can be read are limited by its format. Therefore, it is difficult to universally read many types of documents with one image reading device, and therefore an image reading device that integrates each of the reflected light type and transmitted light type image reading devices has been developed. It is requested. FIG. 1 shows an image reading device that integrates this type of reflected light type and transmitted light type.

That is, in FIG. 1, reference numeral 10 indicates an image reading device, and this image reading device 10 includes a light-transmissive document table 12 made of a glass plate or the like. A light source 14 that outputs transmitted illumination light L2 from an oblique direction is provided below the document table 12, while a light source 16 that outputs reflected illumination light L2 from an oblique direction is provided above the document table 12. in this case,
A mirror 18 is placed on the extension of the transmitted illumination light L+ transmitted through the transmissive original and the reflected illumination light L2 reflected by the reflective original.
is provided, and by this mirror 18 the transmitted illumination light L
1 and reflected illumination light L2 selectively enter the CCD camera 20.

Therefore, when reading a reflective original, the reflective original is placed on the original table 12, and the original table 12 is conveyed in the direction of the arrow. During this time, the reflective type original is illuminated with reflected illumination light L2 from the light source 16, and the reflected illumination light L2 is applied to the mirror 1.
8 to the CCD camera 20. Then, this CCD camera 20 converts it into an electrical signal and reads the image information of the reflective original.

When reading a transmissive original, the transmissive original is placed on the original table 12, and the original table 12 is conveyed in the direction of the arrow. During this time, transmitted illumination light is output from light #14 and transmitted through the transmission type original, and then enters the CCD camera 20 via the mirror 18 and is converted into an electrical signal. In this way, the image information of the transmissive original is read. Note that the arrangement of the light sources 14, 16, mirror 18, and CCD camera 20 as described above is
The D camera is configured to be able to read image information from either a reflective original or a transmissive original.

However, as shown in FIG. 2, when reading a transmissive original C, for boat fishing, the transmissive original C has an image forming layer C+ (for example, a thin film containing a pigment) that depicts image information on its surface. layers) exist in a stacked state. Therefore, since the transmitted illumination light L1 illuminates the transmitted type original C at an angle of a predetermined angle θ with respect to the imaginary perpendicular line 22 perpendicular to the original 12,
For example, along the imaginary perpendicular 22 or this imaginary perpendicular 2
2, the distance through which the transmitted illumination light L3 passes through the image forming layer C0 of the transmitted original C becomes longer. Therefore, the apparent upper image density of the transmissive original C changes as the direction of the transmitted illumination light L1 to L3 passing through the transmissive original C changes.

Therefore, the density of the transmissive original C when the transmitted illumination light L3 is output in a direction substantially parallel to the virtual perpendicular 22, that is, the vertical direction, is D, and the transmitted illumination light L1 is output in a direction tilted by a predetermined angle θ. Let D' be the density of the transmission type original Cty). In addition, the density per unit area of the image forming layer C3 is Δ
D, the distance in the vertical direction of the image forming layer C6 is β, and the distance in the direction tilted at a predetermined angle θ is 1'. In this case, the density is expressed as D=1·ΔD, and the density D' is D
' = β' ·ΔD.

At this time, since it is possible to express it as ρ, the concentration D' becomes as shown in the following equation.

cos v cos.

Therefore, the density D' of the transmissive original C when the transmitted illumination light L1 is outputted from a direction tilted by a predetermined angle θ is substantially l when compared with the density when the transmitted illumination light L3 is outputted from the vertical direction. /cosθ, and the amount of transmitted illumination light passing through the transmission type original C is 10i1t1/
cos θ). As a result, the CCD camera 2
The amount of light incident on the CCD camera 20 also decreases, and the transmitted illumination light L1 appears to be incident on the CCD camera 20 with an increased image density. On the other hand, in order to make the image density as accurate as possible, a high-precision CCD camera must be used, but this type of CCD camera is extremely expensive. However, the disadvantage that the image reading device 10 equipped with the commonly used CCD camera 20 cannot accurately read the transparent original C has been exposed.

[Object of the Invention] The present invention has been made to overcome the above-mentioned disadvantages, and includes an image reading means for reading the reflected illumination light outputted from the reflective illumination means and reflected obliquely with respect to the reflective original; an optical path converting means for refracting the transmitted illumination light outputted from the transmitted illumination means and passed in a direction substantially perpendicular to the transmissive type document and guiding it into the optical path of the reflected illumination light;
It is an object of the present invention to provide an image reading device including a reflector that causes transmitted illumination light derived from the optical path converting means to enter the image reading means. As a result, when reading a reflective type original, by using the image reading means to read the reflected illumination light reflected in an oblique direction, it is possible to reproduce an image with high quality accuracy without surface reflections or pasting marks. When reading a document, the transmitted illumination light is passed in a direction substantially perpendicular to the transmission type document and is incident on the image reading means via the optical path converting means and the reflector. Since the light passes through the shortest distance of the original, the desired amount of light can be incident on the image reading means without increasing the apparent density. Therefore, it is possible to accurately read transmission type originals, and as a result, it is inexpensive. This makes it possible to obtain high-quality images with a suitable device.

[Means for Achieving the Object] In order to achieve the above-mentioned object, 1. the present invention provides an image reading device capable of reading image information of a reflective original and a transmissive original; a reflective illumination unit that outputs reflected illumination light from a direction tilted at a predetermined angle with respect to the reflective illumination unit; and an image reading unit that reads the reflected illumination light that is output from the reflective illumination unit and reflected in a direction that tilts the reflective original at a predetermined angle. Transmitted illumination means outputs transmitted illumination light from a direction substantially perpendicular to the document surface; and an optical path of the transmitted illumination light outputted from the transmitted illumination means and passed through the transmission type original is adjusted to the optical path of reflected illumination light. and a reflector that is disposed in the optical path of the reflected illumination light so as to be movable forward and backward, and allows the transmitted illumination light derived from the optical path conversion means to enter the image reading means. [Embodiments] Next, preferred embodiments of the image reading device according to the present invention will be listed, and will be described in detail below with reference to the accompanying drawings.
Ru.

In FIG. 3, reference numeral 30 indicates an image reading device according to this embodiment. This image reading device 30 includes a document table 32 on which a document is set, a conveyance mechanism section 34 that conveys the document table 32 in the direction of arrow A7i, and an image that scans the document conveyed in the sub-scanning direction by the conveyance mechanism section 34. In this case, the transport mechanism section 34 is arranged on the first casing 38, and the image reading section 36 is placed on the first casing 38. It is provided inside the second casing 4G. Note that an opening 42 is defined on one side of the second housing 40 to allow the document table 32 to pass therethrough.

First, the transport mechanism section 34 will be explained. Horizontal and parallel guide bars 443 and 44b are disposed on the upper surface of the first housing 38, and these guide bars 44
Both ends of a and 44b are supported by support stands 46 and 48 on the first housing 38. Moreover, the guide bar 44a
, 44b, a ball screw 50 connects the supports 46 and 4.
8. In this case, the ball screw 50 is rotationally driven by a drive motor 52 provided within the first housing 38.

A document table 32 holding a transmissive document S1 or a reflective document S2 carrying image information is movably supported by the guide bars 44a and 44b. That is, as shown in FIG.
1 or a reflective type document S2, and a holding lid 58. Here, the transmission type document S1 is composed of a film base 51 made of resin or the like and an image forming layer 53 carrying image information (see FIG. 5). On the other hand, for example, a photograph 55 is attached to the reflective original S2 (
(See Figure 6).

A hollow portion 60 into which a prismatic body described later is inserted into the base 54.
is defined, and an opening 61 for guiding transmitted illumination light, which will be described later, to the transmission type document S1 via the base glass 56.
is defined. Further, the presser cover 5 is provided on the side surface of the base 54.
Support members 66a and 66b are attached to support 8 to open and close in directions of arrows B, , and B2, and on the opposite side there is a lock member 68 having a lever 67 for engaging the presser lid 58 and the base 54. is attached. On the other hand, the presser lid 58 has a frame 77 having a substantially U-shaped cross section and a presser glass 78 held between the frame 77, and a gripping portion 82 having a lock hole 80 is attached to the frame 77. Ru.

The transmitted illumination means 83 is surrounded by a hollow prismatic body 85 whose both ends are supported on the first housing 38 by support stands 84a and 84b. The prismatic body 85 defines an opening 86 for guiding transmitted illumination light, which will be described later. The transmitted illumination means 83 is housed in the prismatic body 85,
This transmitted illumination means 83 is constructed by bundling together a light source 88 which is made of a halogen lamp, a xenon lamp, etc. and outputs transmitted illumination light L1, and a large number of optical fibers 90 whose both ends are held by light-guiding holding members 89a and 89b. and an optical fiber bundle 92. In addition, the prismatic body 85
A cylindrical rod lens 94 is disposed therein to condense the transmitted illumination light L1 guided by the optical fiber bundle 92 into a line. The transmitted illumination light collected by the rod lens 94 is guided to the transmission type document S1 via a hairline mirror 96. In this case, the hairline mirror 96 is set so that the transmitted illumination light L1 is approximately perpendicularly incident on the transmission type document S1.

On the other hand, inside the second casing 40 are a first mirror 102 serving as an optical path converting means for horizontally reflecting the transmitted illumination light L1 that has passed through the transmission type document S1 substantially vertically, and the first mirror 1
A second mirror 104 is provided to reflect the transmitted illumination light 1-1 reflected in the horizontal direction by the mirror 102 vertically upward.

Then, on the extension of the transmitted illumination light L+ reflected vertically upward, there is a reflector 106 that is displaced in the directions of arrows R1 and R2.
will be placed. At this time, the reflector 106 is provided so as to be able to move forward and backward within the optical path of reflected illumination light, which will be described later. The reflector 10
6, the transmitted illumination light L1 is transmitted through this reflector 106.
A CCD camera 108 is provided as an image reading means for reading. Note that the first mirror 102 and the second mirror 10
4 is transmitted illumination light from the document surface to the CCD camera 108; The optical path length of the reflected illumination light (described later) is set to be equal to the optical path length of the reflected illumination light (described later). Here, the reflector 106 can be moved by arrows R, , , using a 111 driving force source, for example.
, R2 direction.The reflection mechanism 110 constituting the reflector 106 includes side plates 112a and 112b, as shown in FIG. , a rotational drive #114 such as a motor is provided. , the rotary drive shaft 114 is provided with a rotating shaft 11j1 that rotates in the directions of arrows R1 and R2 so as to pass through the side plates 112a and 112tl, and a reflector 106 is integrally attached to this rotating shaft 115. Mounted for displacement.

The reflector 106 is composed of a mirror holder 116 and a mirror 11.8 disposed on the reflective side of the second mirror holder 116. Further, a plate member 120 having an abbreviated shape is provided at the lower part of the side plate 112a, and a stopper 122 is attached to the tip of the plate member 120 to prevent the rotation of the anti-911 body 106 by the necessary 1λL.

- On the other hand, in the second housing 40, a reflective illumination means 130 is provided that irradiates the reflective original S2 with reflected illumination light, which will be described later. In this case, the reflected illumination means 130 includes a light source 132 that outputs the reflected illumination light L2, and a holding member 13 whose both ends are light guiding.
A number of optical fibers 1 held by 4a, 134b
By bundling 36.

and a cylindrical rod lens 140 that condenses the reflected illumination light 1-52 guided by the optical fiber bundle 138 in a line shape. At this time, reflected illumination light 1. emitted from the holding member 134b. ,．． 2. ! : The position of the holding member 134b is selected so that the illumination angle α formed with the virtual perpendicular line 117 perpendicular to the document table 32 is approximately 15°. reflected illumination light that is more focused on the rod lens 140;
2 reflects the reversible type 1 original S2, and then enters the CCD camera 108 via the mirror 142. At this time, C.C.
The D camera 108 is disposed at a position where it can read the reflected illumination light L2 reflected at a reading angle β of about 30° with respect to the virtual perpendicular 117 via the mirror 142.

The image reading device according to this embodiment is basically configured as described above, and its operation and effects will be explained next.

First, when reading the transmissive original SI, the lever 67 constituting the locking member 68 of the original platen 32 is pressed with a finger or the like to release the lock, and the presser cover 5 is opened via the grip part 82.
8 in the direction of arrow B1. Next, in this state, after placing the transmission original S on the base glass 56, the presser lid 58 is pressed against the transmission original S1. That is,
By displacing the presser cover 58 in the direction of arrow B2 and engaging the tip of the lever 67 with the lock hole 80 of the grip portion 82, the transmission original S1 is held between the base glass 56 and the presser glass 78. Next, under the action of the drive motor 52, the document table 3
2 is conveyed in the six directions of the arrow and moved to a predetermined part of the image reading section 36.

The document table 32 holding the transparent document SI is connected to the image reading unit 36.
When reaching a predetermined portion, an operation of reading the image information carried on the image forming layer 53 of the transmissive original Sl is started. That is, after the transmitted illumination light L1 outputted from the light source 88 passes through the optical fiber bundle 92, it passes through the rod lens 9.
4, the light is reflected vertically upward by a hairline mirror 96, and guided to the document table 32 through the opening 86.

Then, the transmitted illumination light irradiates the transmission type original SI through the base glass 56 in the direction of the arrow shown in FIG. 4, that is, in the main scanning direction. In this case, the transmitted illumination light L1 first passes through the film base 51 of the transmission type original S,
Next, the image information is extracted as an optical signal by passing through an image forming layer 53 that carries image information. After the image information as an optical signal passes through the holding glass 78, it is reflected in the horizontal direction by the first mirror 102, and then reflected vertically upward by the second mirror 104, and is reflected by the reflector 10.
6.

At this time, the reflector 106 is displaced in the direction of arrow R2. That is, the rotating shaft 115 of the rotational drive source 114 is rotated in the direction of arrow R2. Along with this rotation, the reflector 106 also rotates in the direction of arrow R2, and stops its rotating operation when it comes into contact with the stopper 122. And the second mirror 10
The transmitted illumination light Ll containing image information guided from the CCD camera 108 is reflected in the specular direction via the reflector 106, enters the CCD camera 108, and is converted into an electrical signal within the CCD camera 108. During this time, the document is being transported to the document table 32 in the sub-scanning direction (in the direction of the six arrows) under the action of the drive motor 52. Therefore, the transmission type original S1 is illuminated two-dimensionally by the transmission illumination light, and its image information is extracted. After the reading operation is completed, the drive motor 52 is rotated in the opposite direction to move the document table 32 to a predetermined position.

Next, when reading the reflective original S2 to which the photograph 55 is attached, the reflector 106 is first displaced in the direction of the arrow R1 to the position indicated by the two-dot chain line in FIG. That is, when the rotary shaft 115 of the rotary drive source 114 is rotated in the direction of arrow R+, the reflector 106 also rotates with this rotation and stops its rotation at the position shown by the two-dot chain line.

Furthermore, the lever 67 of the original platen 32 is pressed with a finger or the like to release the lock, and the presser cover 58 is moved by the arrow B1 through the grip part 82.
lift in the direction. Next, in this state, the transmissive original S1 is taken out and placed on the table glass 56 with the reflective original S2 facing upward. Then, the presser lid 58 is displaced in the direction of arrow B2, and the tip of the lever 67 is engaged with the lock hole 80. and,.

Under the action of the drive motor 52, the document table 32 is conveyed in the six directions of the arrows and moved to a predetermined portion of the image reading section 36.

When the document table 32 reaches a predetermined part of the image reading section 36,
The reading operation of the reflective original S2 is started.

That is, the reflected illumination light L2 outputted from light #132 passes through the optical fiber bundle 138, is condensed by the rod lens 140, and is guided to the document table 32. Then, the reflected illumination light L2 irradiates the reflective original S2 in the main scanning direction through the presser glass 78, and image information is extracted as an optical signal.

This image information as an optical signal is reflected diagonally off the presser glass 78 and then transmitted to the CCD camera 1 via the mirror 142.
08 and converted into an electrical signal.

During this time, the document table 32 is being transported in the sub-scanning direction under the action of the drive motor 52, so the reflective document S2 is two-dimensionally scanned by the reflected illumination light L2, and its image information is extracted. Become.

In this case, according to the present embodiment, the light source 88 outputs the transmitted illumination light L1 when reading the transmitted original document S1. This transmitted illumination light L1 passes through an optical fiber bundle 92 and a rod lens 94, and then is reflected vertically upward by a hairline mirror 96 to illuminate the transmitted original document S1. Then, the transmitted illumination light L1 containing image information is transmitted to the first mirror 1.
02, after being guided upward via the second mirror 104,
The light is guided to a CCD camera 108 by a reflector 106.

At this time, since the transmitted illumination light L1 passes through the shortest distance between the film base 51 and the image forming layer 53 formed on the transmission type original SI (see FIG. 5), the apparent increase in the upper density appears as in the conventional case. It does not cause As a result, the desired amount of transmitted illumination light L1 can be made incident on the CCD camera 108 without reducing the amount of transmitted illumination light L1. As a result, there is no need for the CCD camera 108 to be a highly accurate CCD camera that can accurately detect image information even with a small amount of illumination light. That is, it becomes possible to obtain high quality images using a normal CCD camera.

On the other hand, when reading the reflective original S2, the reflective original S2 with the photo 55 pasted has a predetermined thickness, and the sixth
As shown in the figure, the illumination angle α is set by the reflected illumination light L2.
When the reflective original S2 is illuminated at an angle of about 15°, a shadow portion 144 is generated at the peripheral edge of the reflective original S2. Therefore, in this embodiment, the reading angle β is set to a larger angle (approximately 30°) than the illumination angle α.

Therefore, the CCD camera 108 does not read the shadow portion 144 caused by the reflected illumination light L2. That is, it is possible to reproduce an image with high quality and accuracy that is substantially free of paste marks and the like.

Furthermore, if the reflective original S2 itself has surface reflections such as grained photographic paper, this surface reflection will reflect within a range of approximately ±40° with respect to the specular reflection direction of the opposite illumination light L2 (known force). Even in this case, the surface reflected light is not made incident on the CCD camera 108 in this embodiment.

Therefore, it is possible to guide only the reflected illumination light L2 necessary for reading the reflective original S2 to the CCD camera 108, thereby making it possible to obtain a high-quality reproduced image.

In this embodiment, the reflector 06 is displaced using the rotary drive source 114, but a cam means may also be used. A reflection mechanism 110a according to this second embodiment is shown in FIG. Here, the same reference numerals are given to the same components as in the first embodiment, and detailed explanation thereof will be omitted.

That is, in FIG. 8, the reflection mechanism 110a is connected to the side plate 1.
50a and 150b, a rotary drive #1114 is disposed on the side plate 150a, and this rotary drive source i14 has a rotating shaft 152 that rotates in the directions of arrows El and E2.
A cam member 154 having a substantially elliptical shape is fixed to the rotary shaft 152 so as to pass through the rotary shaft 152 . and,
A sliding member 156 that slides on the circumferential surface of this cam member 154
is provided on the side plate 150a.

The same sliding member 156 is also provided on the side plate 150b. A reflector 106 is fixed at a predetermined angle between the respective sliding members 156 and 156. The sliding member 1
A guide bar 158.1.58 is attached to the upper part of 56.156, and this guide bar 158.15B is connected to the elongated hole 160.160 defined in each side plate 150a, 150b.
It is fitted in such a way that it can be raised and lowered freely. Furthermore, the sliding member 156.
A coil spring 164.164 is interposed between the support 156 and the support 162.162.

In such a mechanism, when the reflector 106 is moved downward to guide the transmitted illumination light L1 to the CCD camera 108, the rotation shaft 152 is rotated in the direction of the arrow E2 via the rotation drive #114. With this rotation, the cam member 154
The distal end portion also rotates in the direction of arrow E2. This causes the sliding member 156.156 to move to the coil spring 164.164.
Since the reflector 106 is displaced downward against zero repulsion force, the reflector 106 also moves downward. At this time, the respective guide bars 158, 158 of the sliding members 156, 156 will be displaced downward through the elongated holes 160, 160. Therefore, if the transmitted illumination light L1 is outputted from the light source 88 in this state, the transmitted illumination light L1 will be incident on the CCD camera 108 via the reflector 106.

[Effects of the Invention] As described above, according to the present invention, the image reading means reads the reflected illumination light outputted from the reflected illumination means and reflected obliquely with respect to the reflective original; an optical path converting means for refracting the transmitted illumination light that has passed through the transmission type original in a direction substantially perpendicular to the transmission type document and guiding the transmitted illumination light into the optical path of the reflected illumination light; A reflector is provided to allow the light to enter the image reading means.

Therefore, when reading a reflective type original, by using an image reading means to read the reflected illumination light reflected in an oblique direction, it is possible to reproduce an image with high quality and accuracy without surface reflections, pasting marks, etc. In addition, when reading a transmissive original, the transmitted illumination light is passed in a direction approximately perpendicular to the transmissive original.
The light is made incident on the image reading means via the optical path changing means and the reflector. As a result, since the transmitted illumination light passes through the shortest distance of the transmission type document, desired light repellency can be made incident on the image reading means without increasing the apparent density. Therefore, it is possible to accurately read a transparent original without using a highly accurate image reading means, and as a result, it is possible to obtain a high quality image.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments.
Of course, various improvements and changes in design are possible without departing from the gist of the invention.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an image reading device according to the prior art. FIG. 2 is an explanatory enlarged cross-sectional view of main parts of an image reading device according to the prior art. FIG. 3 is a schematic cross-sectional view of an image reading device according to the present invention. , FIG. 4 is a perspective explanatory view of the document table in FIG. 3, FIGS. 5 and 6 are explanatory diagrams showing the traveling direction of light with respect to a reflective original and a transmissive original in the image reading device according to the present invention, Figure 7 shows the reflection mechanism in Figure 3 and (1) a perspective explanatory view of a CD camera, and Figure 8 shows another embodiment of the reflection mechanism in Figure 3 and CC
A perspective explanatory view of the D camera. FIG. 9 is a front view of the reflection mechanism in FIG. 8. 30... Image reading device 32... Removal table 34
... Transport mechanism section 38.40 ... Housing 52
... Drive motor 83 ... Transmitted illumination means 8
5...Prismatic body 102.104...Mirror 106...Reflector 108...CC
D camera 1.10...reflection mechanism 117...
・Virtual perpendicular line 130...Reflected illumination means 142...
・Mirror L...Transmitted illumination light SI...Transmissive type original L2...Reflected illumination light S2...Reflected type original Δ

Claims (3)

[Claims] (1) An image reading device capable of reading image information of reflective originals and transmissive originals, which includes a reflective illumination means that outputs reflected illumination light from a direction inclined at a predetermined angle with respect to the normal to the original surface. , an image reading means for reading reflected illumination light outputted from the reflective illumination means and reflected in a direction that tilts the reflective original at a predetermined angle; and a transmitted illumination means for outputting transmitted illumination light from a direction substantially perpendicular to the surface of the original. an optical path converting means that adjusts the optical path of the transmitted illumination light outputted from the transmitted illumination means and passed through the transmission type document and guides it to the optical path of the reflected illumination light; An image reading device comprising: a reflector which is freely disposed and causes transmitted illumination light derived from the optical path converting means to enter the image reading means. (2) The image reading device according to claim 1, wherein the reflector is movable forward and backward within the optical path of the reflected illumination light via a rotational drive source. (3) The image reading device according to claim 1, wherein the reflector is movable forward and backward within the optical path of the reflected illumination light via a cam means.