JPH08167979A - Image input device - Google Patents

Abstract

PURPOSE: To allow the image input device to read two originals with a different size at a proper magnification. CONSTITUTION: The device is provided with an original holder 21, a lighting means 41, an optical path branch means 80 branching a reflected light/ transmission light made incident via an original 20 lighted by the lighting means 41 in two directions of a 1st optical path 90 and a 2nd optical path 100, 1st and 2nd image means 92, 102 arranged in the 1st and 2nd optical paths 90, 100 branched by the optical path branch means 80 with different magnification and forming the image of the reflected light/transmission light, and 1st and 2nd optical systems 91, 101 having 1st and 2nd sensors 93, 103 reading the image formed by the 1st and 2nd image forming means 92, 102.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for reading originals such as transparent originals and non-transparent originals, and more particularly to two originals having two optical systems, the two optical systems having different sizes. Is read at different magnifications.

[0002]

2. Description of the Related Art Conventionally, as an example of this type of image input apparatus, a scanner for a so-called 35 mm size slide film is shown in FIGS. FIG. 15 is a schematic horizontal sectional view of a conventional image input device, and FIG. 16 is an external perspective view of the conventional image input device.

In FIGS. 15 and 16, reference numeral 200 denotes a conventional image input device, and this image input device 200 has a slide holder 211 for holding a slide film 210 at its center, as shown in FIG. And slide holder 2
11, the light source for illuminating the slide film 210 held by the slide holder 211 is on the right side in FIG.
220 are arranged. Illumination light from the light source 220 including the concave mirror 220a is applied to the slide film 210 via the filter group 221 and the lens group 222.

A reflection mirror 223 is arranged on the left side of the slide holder 211 in FIG. The transmitted light that has passed through the slide film 210 has its optical axis bent at a right angle through the reflection mirror 223,
A line-type image sensor C is formed by the imaging lens 224.
It is imaged on CD225. In this way, the image on the slide film 210 is read by the CCD 225, and the photoelectrically converted image signal is output from the image input device 200 to an image processing unit (not shown) such as an external computer.

As shown in FIG. 15, the slide holder 211 has two guide rails 213 via a stage 212.
It is slidably held by the film scanning mechanism 230 and moved in the sub-scanning direction. The film scanning mechanism 230
The stage motor 23 is roughly classified as shown in FIG.
1 and the scanning lead screw 23 rotated by this motor 231
It consists of 2 and.

The scanning lead screw 232 is screwed into the screw cylinder 214 of the stage 212, as shown in FIG. Therefore, as the stage motor 231 rotates, the stage 212 slides along the guide rail 213, and the slide holder 211 moves in the sub-scanning direction.

Further, as shown in FIG. 15, the image forming lens 224 and the CCD 225 are held at a constant interval by an optical system supporting member 226. Then, the optical system support member 22
As shown in FIG. 15, 6 moves in the optical axis direction by the focusing mechanism 240. The focusing mechanism 240 is shown in FIG.
As shown in FIG.
And a focus adjusting lead screw 242 which is rotated by.

Then, the focus adjusting lead screw 242 is used.
Is a screw tube 2 of the optical system support member 226, as shown in FIG.
Threaded into 27. Therefore, the focus adjustment motor 24
When 1 rotates, the optical system support member 226 moves in parallel to the optical axis, and changes the distance between the imaging lens 224 and the slide film 210 held by the slide holder 211.

An image processing unit (not shown) such as a computer connected to the image input device 200 drives the focusing mechanism 240 in addition to image input processing, and based on the input image signal. The image contrast is calculated and the focusing operation is performed automatically. FIG.
In FIG. 6, reference numeral 250 denotes a case, and a recess 251 is formed in the center of the case 250, and the recess 251 constitutes a moving space for the slide holder 211. Further, as shown in FIGS. 15 and 16, an air intake hole 252 is provided on the side surface of the case 250, and an exhaust fan 253 is provided inside the case 250, so that the light source 220 in the case 250 and The heat generated from the power supply 254 and the like is exhausted to the outside of the case 250.

[0010]

However, in the above-mentioned conventional image input apparatus 200, since the magnification of the imaging lens 224 is fixed for a so-called 35 mm size slide film, if the size of the film original differs, The first problem is that it cannot be used. Eg 4
When used for inch x 5 inch film originals,
Only part of it can be read.

On the contrary, if the magnification of the imaging lens 224 is fixed according to the film original of 4 inch × 5 inch size, conversely, when it is used for the film original of so-called 35 mm size, of all the pixels of the CCD 225. Since only some of them are used, sufficient image quality cannot be obtained. Therefore, a plurality of image input devices 200 are required according to the size of the film original.

On the other hand, the magnification of the image forming lens 224 may be variable, but if so, the image forming lenses 224 and C
The distance to CD225 must also change. For this reason, if the magnification of the imaging lens 224 is configured to be variable, the focusing and the magnification adjustment have to be performed individually, which complicates the mechanism and increases the size of the apparatus. May occur.

Therefore, the invention of claim 1 has been made in view of the first and second problems of the above-mentioned conventional technique, and the purpose thereof is that the size is different.
An image input device is provided in which two optical systems having different magnifications are prepared in accordance with one original and both optical systems are switched so that two originals having different sizes can be read at appropriate magnifications. Is.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the object of the invention described above, an object of the present invention is to provide an image input device capable of facilitating branching of an optical path and focusing by arranging two optical systems in parallel. According to a third aspect of the invention, in addition to the object of the second aspect of the invention, the optical path splitting means is composed of two reflecting mirrors, so that the structure of the optical path splitting means can be simplified and downsized. It is intended to provide an image input device.

The invention according to claim 4 is the above-mentioned claim 2.
In addition to the object of the invention described above, by constructing the optical path branching means from a single reflecting mirror, the structure of the optical path branching means can be further simplified and further miniaturized as compared with the invention according to claim 3. It is intended to provide a possible image input device. According to a fifth aspect of the present invention, in addition to the object of the first aspect of the invention, an image input device capable of facilitating branching of an optical path and focusing by arranging two optical systems on a straight line is provided. It is the one we are trying to provide.

The invention according to claim 6 is the above-mentioned claim 5.
In addition to the object of the invention described above, it is an object of the present invention to provide an image input device capable of simplifying the structure of the optical path branching means and downsizing it by configuring the optical path branching means with one reflecting mirror. According to the invention described in claim 7, in addition to the object of the invention described in claim 1, by arranging two optical systems with a predetermined angle, branching of an optical path and facilitation of focusing are possible. It is intended to provide an image input device.

The invention according to claim 8 is the above-mentioned claim 7.
In addition to the object of the invention described above, it is an object of the present invention to provide an image input device capable of simplifying the structure of the optical path branching means and downsizing it by configuring the optical path branching means with one reflecting mirror. According to a ninth aspect of the invention, in addition to the object of the seventh aspect of the invention, the image input is such that the total number of parts of both optical systems can be reduced by using two optical system sensors in common. It is intended to provide a device.

According to a tenth aspect of the present invention, in addition to the above-mentioned object of the first aspect of the invention, an object is to provide an image input device capable of focusing.

[0019]

The present invention is to achieve the above-mentioned object, and the contents thereof will be described below with reference to the embodiments shown in the drawings. The invention according to claim 1 is characterized by comprising the following five configurations as shown in FIGS. 1 to 7, for example.

The first is a document holder (21), which holds a document (for example, a film document 20) as shown in FIG. 1, for example. Second
Is an illuminating means (for example, a light source 41), and the illuminating means (for example, a light source 41) is for illuminating the original document (for example, the film original document 20) held by the original document holder (21) as shown in FIG. It illuminates an image.

Third, there is an optical path branching means (80). This optical path branching means (80) is, for example, as shown in FIGS. 3 and 5, the original document (eg, film) illuminated by illumination means (eg, light source 41). The reflected light / transmitted light incident via the original 20) is branched into two directions of a first optical path 90 and a second optical path 100. The fourth is the first optical system (91), which is the first
The optical system (91), as shown in FIG.
The first image forming means (for example, the first image forming means) which is disposed in the first optical path (90) branched by the optical axis 0) forms an image of the reflected light / transmitted light.
It has an image forming lens 92) and a first sensor (93) for reading an image formed by the first image forming means (for example, the first image forming lens 92).

The fifth is a second optical system (101), and the second optical system (101), as shown in FIG. 5, is the second optical path branched by the optical path branching means (80). Second image forming means (for example, second image forming lens 102) which is arranged in (100) and forms the reflected light / transmitted light at a magnification different from that of the first image forming means (for example, first image forming lens 92). ), And a second sensor (103) for reading the image formed by the second image forming means (for example, the second image forming lens 102).

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the first optical system (91) and the second optical system (101) are two directions orthogonal to the optical axis of the reflected light / transmitted light, as shown in FIGS. Are arranged parallel to each other on one side.

The invention according to claim 3 is the above-mentioned claim 2.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the optical path branching means (80)
Is, for example, as shown in FIGS. 3, 8 and 9, a first reflection mirror (81) for reflecting the reflected light / transmitted light toward a first image forming means (for example, a first image forming lens 92); At a position where the reflected light / transmitted light appears in the optical path between the first reflection mirror (81) and the document holder (21) and appears in the optical path, the reflected light / transmitted light is formed into a second image forming unit (for example, a second image forming unit). It is composed of a second reflecting mirror (82) for reflecting toward the image lens 102).

The invention according to claim 4 is the above-mentioned claim 2.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the optical path branching means (80)
For example, as shown in FIG. 10, it is composed of one reflection mirror (160) that moves in parallel along the optical axis of the reflected light / transmitted light.

The invention according to claim 5 is the above-mentioned claim 1.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the first optical system (91) and the second optical system (101) are, for example, as shown in FIGS. 11 and 12, on both sides in two directions orthogonal to the optical axis of the reflected light / transmitted light. Are arranged side by side on a straight line.

The invention according to claim 6 is the above-mentioned claim 5.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the optical path branching means (80)
For example, as shown in FIGS. 11 and 12, the first reflection surface (171, 181) for reflecting the reflected light / transmitted light toward the first image forming means (for example, the first image forming lens 92) and the reflected light /
A second reflecting surface (172, 182) for reflecting the transmitted light toward the second image forming means (for example, the second image forming lens 102), and the first and second reflecting surfaces (171, 172, 181, 182)
One reflecting mirror that selectively appears in the optical path of transmitted light
It is composed of (170,180).

The invention according to claim 7 is the above-mentioned claim 1.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the first optical system (91) and the second optical system (101) are arranged at different angles with respect to the optical axes of the reflected light / transmitted light as shown in FIGS. Has been done.

The invention according to claim 8 is the above-mentioned claim 7.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the optical path branching means (80)
Is, for example, as shown in FIG. 13, one reflection mirror (190) capable of changing the angle of the reflected light / transmitted light with respect to the optical axis.
It consists of

The invention according to claim 9 is the above-mentioned claim 7.
In addition to the configuration of the described invention, it is characterized by having the following configuration. That is, the first sensor of the first optical system (91) and the second sensor of the second optical system (101) are composed of one common sensor (200) as shown in FIG. 14, for example. Then, on the one common sensor (200), the first image forming means (for example, the first image forming lens 92) of the first optical system (91) and the first image forming unit of the second optical system (101) are formed. Two
The reflected light / transmitted light is imaged by an image forming means (for example, the second image forming lens 102).

The invention described in claim 10 is characterized in that it has the following structure in addition to the structure of the invention described in claim 1. That is, the invention according to claim 10 detects the image forming state of the image in the first and second sensors (93, 103), as shown in, for example, FIGS. , And focusing means (110) for performing focusing by changing the relative position with respect to the second optical system (for example, the first imaging lenses 92, 102).

[0032]

Therefore, the invention according to claim 1 has the following effects. That is, the first and second optical systems (91,10
By selecting an appropriate optical system as shown in, for example, FIGS. 3, 5, 8, 11, and 13 in 1), it is possible to read originals of different sizes at appropriate magnifications.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the functions of the described invention, the following effects are achieved. That is, as shown in FIGS. 3, 5, 8 and 9, for example, the reflected light / transmitted light is branched in two parallel directions toward one side in two directions orthogonal to the optical axis, whereby the first , Second
It can be made incident on the optical system (91, 101).

The invention according to claim 3 is the above-mentioned claim 2.
In addition to the functions of the described invention, the following effects are achieved. That is, at a position where the second reflecting mirror (82) is out of the optical path between the first reflecting mirror (81) and the document holder (21), as shown in FIGS. Reflective mirror
The reflected light / transmitted light is reflected by the first image forming means (eg
It can be reflected toward the imaging lens 92).

On the other hand, the second reflecting mirror is provided in the optical path.
At the position of appearing at (82), as shown in, for example, FIGS. 102). The invention according to claim 4 is
In addition to the action of the invention described in claim 2, the following action is exhibited.

That is, by moving one reflecting mirror (160) in parallel along the optical axis of the reflected light / transmitted light as shown in FIG. It can be reflected by the optical system (91, 101). According to the invention of claim 5, in addition to the operation of the invention of claim 1 described above,
It has the following effects.

That is, the reflected light / transmitted light is converted into, for example, FIG.
As shown by 1 and 12, by branching in two directions orthogonal to the optical axis, the light can be made incident on the first and second optical systems (91, 101). The invention described in claim 6 has the following operation in addition to the operation of the invention described in claim 5.

That is, by the first reflecting surface (171, 181) of one reflecting mirror (170, 180), for example, as shown by the solid line in FIGS. It can be reflected towards the image lens 92). The second reflecting surface (17) of one reflecting mirror (170, 180)
2, 182), the reflected light / transmitted light can be reflected toward the second image forming means (for example, the second image forming lens 102) as shown by the dotted lines in FIGS.

The invention according to claim 7 is the above-mentioned claim 2.
In addition to the functions of the described invention, the following effects are achieved. That is, as shown in FIGS. 13 and 14, for example, reflected light / transmitted light is incident on the first and second optical systems (91, 101) by branching in two directions while maintaining different angles with respect to the optical axis. Can be made.

The invention according to claim 8 is the above-mentioned claim 7.
In addition to the functions of the described invention, the following effects are achieved. That is, by changing the angle of one reflection mirror (190) with respect to the optical axis of the reflected light / transmitted light as shown in FIG. 13, for example, the reflected light / transmitted light is reflected by the first and second optical systems (91, 101). )
Can be reflected toward.

The invention according to claim 9 is the above-mentioned claim 7.
In addition to the functions of the described invention, the following effects are achieved. That is, the first and second optical paths (90, 100) branched in two directions by the optical path branching means (80) are, for example, as shown in FIG.
The first image forming means (for example, the first image forming lens 92) of the first optical system (91), and the second image forming means (for example, the second image forming lens 102) of the second optical system (101). Thereby, it is possible to form an image on one common sensor (200).

The invention described in claim 10 has the following operation in addition to the operation of the invention described in claim 1.
That is, the focusing means (110) detects the image formation state of the image at the first and second sensors (93, 103). Based on the detected image formation state, for example, as shown in FIGS. 3 and 5, the relative position between the document holder (21) and the first and second optical systems (for example, the first image formation lenses 92 and 102) is changed. Focus on.

[0043]

1 to 7 show a first embodiment of the present invention. FIG. 1 is a schematic vertical sectional view of an image input device, FIG. 2 is an external perspective view of the image input device, and FIG. 4 is an enlarged vertical sectional view of the system holder, FIG. 4 is a schematic horizontal sectional view, FIG. 5 corresponds to FIG. 3, an enlarged vertical sectional view of the optical system holder showing the switching state of the reflection mirror, and FIG. 6 corresponds to FIG. FIG. 7 is an enlarged vertical sectional view of the optical system holder during transportation, and FIG. 7 is a partial schematic horizontal sectional view of the optical system holder during transportation, corresponding to FIG.

In FIG. 2, reference numeral 10 denotes an image input device. The image input device 10 reads an image of, for example, a film original 20 as an original, and an image processing unit (not shown) such as an external computer. ) Is used as a scanner for outputting an image signal. As the film original 20, two types having different sizes, for example, so-called 35 mm size and 4 inch × 5 inch size are selected.

The size of the film original 20 is not limited to the so-called 35 mm size and 4 inch × 5 inch size, but other sizes such as 6 cm × 6 cm, 6 cm × 7 cm, 6 cm × 9 cm may be used. Further, the original may be, for example, a transparent original such as a film original 20 or a negative film, or a non-transparent original such as a printed print, poster, book, or magazine.

As shown in FIG. 2, the film original 20 is held in the original holder 21 in this embodiment, and is horizontally centered at the height of the front of the case 30 of the image input apparatus 10. It is inserted horizontally from 31. As shown in FIG. 2, the original document holder 21 is, for example, in the form of a frame and holds the non-image surface around the image surface of the film original document 20, and has an opening on the front and back surfaces facing the image surface of the film original document 20. 22 are formed.

The document holder 21 may be replaced with a so-called slide mount, or may be one capable of holding the unmounted film document 20. Further, the document holder 21 may be prepared in two kinds of sizes, that is, a so-called 35 mm size and a 4 inch × 5 inch size, or, for example, a larger 4 inch × 5 inch size film original 20. The opening 22 may be masked when a small size, that is, a so-called 35 mm size is used. Further, the film original 20 may be a series of images of a plurality of frames, or may be cut for each frame.

As shown in FIG. 1, the inside of the case 30 is divided into three layers in the vertical direction centering on the insertion port 31. First, in the upper layer of the case 30, as shown in FIG.
A document illumination unit 40 that illuminates the film document 20 is arranged. Next, in the intermediate layer in the case 30, that is, below the document illumination section 40, a document scanning section for scanning the film document 20 is provided.
50 are arranged. Further, a document reading unit 60 that reads an image of the film document 20 is arranged in a lower layer of the case 30, that is, below the document scanning unit 50. The document reading unit 60 is arranged in the front half of the front side of the case 30 having the insertion port 31, and the power supply unit 70 is arranged in the latter half.

First, the document illumination section 40 will be described with reference to FIG. As shown in FIG. 1, the original illuminating section 40 is a light source 41 as an illuminating means for illuminating the film original 20.
And various filters 42 to 44 arranged in the space between the light source 41 and the film original 20, illumination lenses 45 and 46, and illumination mirrors 47 to 49. The light source 41 is shown in FIG.
As shown in, it is composed of, for example, a halogen lamp having a concave mirror 41a.

As shown in FIG. 1, the filters 42 to 44 include a heat ray absorbing filter 42 and a diffusion plate 43 from the light source 41 side.
And a color filter 44 is arranged. The heat ray absorption filter 42 absorbs heat ray components from the halogen lamp. The diffusion plate 43 forms a uniform light source surface without unevenness. As the color filter 44, three color filters of red, green and blue are used, and the same image is read alternately for each color,
Color images can be input.

The number of filters 42 to 44 is not limited to three. For example, in the case of monochrome, the color filter 44 can be omitted, or more than three filters may be arranged. As shown in FIG. 1, the lenses 45 and 46 are composed of a first illumination lens 45 and a second illumination lens 46 from the light source 41 side. A Fresnel lens, for example, is used as the first illumination lens 45.

As the second illuminating lens 46, as shown in FIG. 1, a plurality of, for example, two Fresnel lenses are used. The illumination light emitted from the light source 41 is condensed behind the film original 20 by the first and second illumination lenses 45 and 46. Although Fresnel lenses are used as the illumination lenses 45 and 46, they are not limited to Fresnel lenses and ordinary lenses may be used. Further, the first and second illumination lenses 45 and 46 are used as the illumination lenses 45 and 46, but the number of the illumination lenses 45 and 46 is not limited to two, and one set or three or more sets are arranged. You may. Further, one lens for the first illumination lens 45 and the second illumination lens 46
Although two lenses are used for the above, the number of lenses is not limited to that of the embodiment.

As shown in FIG. 1, the illuminating mirrors 47 to 49 are arranged between the first illuminating lens 45 and the second illuminating lens 46, for example, three first to first illuminating lenses. It is composed of three illumination mirrors 47 to 49. As shown in FIG. 1, each of the first to third illumination mirrors 47 to 49 bends the optical axis of the illumination light emitted from the light source 41 in a direction perpendicular to each other.

That is, the light source 41, as shown in FIG.
A light source 41 arranged on the back side of the case 30 and provided with a concave mirror 41a
The illuminating light emitted from the light travels horizontally toward the front of the case 30. The illumination light traveling in the horizontal direction is the first illumination mirror.
Reflected by 47, its optical axis is bent vertically downward. Thereafter, the illumination light reflected by the first illuminating mirror 47 is horizontally folded toward the back of the case 30 by the second illuminating mirror 48, and further vertically downward by the third illuminating mirror 49. It is incident vertically on the horizontal film surface of the document 20.

As described above, since the optical path of the illumination light is folded by the three illuminating mirrors 47 to 49, and the optical path is arranged parallel to the film surface of the film original 20, the original illuminating section 40 is vertically moved. There is an advantage that the thickness in the direction can be reduced. The number of illumination mirrors 47 to 49 is not limited to three,
More may be provided.

Next, the document scanning section 50 will be described with reference to FIG. As shown in FIG. 1, the document scanning unit 50 includes a document holder 21 inserted from an insertion port 31 of a case 30.
The stage 51 for holding the film original 20 parallel to the image surface of the film original 20, that is, horizontally.
It is composed of a document scanning unit 52 which slides in parallel to the image plane of 20, that is, in the horizontal direction.

As shown in FIG. 1, the document scanning means 52 includes a stage motor 53 fixed in the case 30 and a scanning lead screw 54 rotated by the stage motor 53.
And this scanning lead screw 54 is screwed in, the stage
It is composed of a screw cylinder 55 provided on the 51 and a guide member (not shown) passed over the front and back. Therefore, when the stage motor 53 is driven, the scanning lead screw 54 rotates, and since the scanning lead screw 54 is screwed into the screw cylinder 55 of the stage 51, the stage 51 moves horizontally.

The rotational force of the stage motor 53 is converted into a linear motion by the scanning lead screw 54 and the screw cylinder 55 into which the scanning lead screw 54 is screwed, but other link mechanism or cam mechanism is used. You may. Next, the document reading section
The 60 will be described mainly with reference to FIGS. The document reading unit 60 is housed in an optical system holder 61 fixed in the case 30, as shown in FIG.

As shown in FIGS. 1 and 3, the optical system holder 61 forms a so-called dark box by forming a hollow box, and the transmitted light after passing through the film original 20 is incident on the upper surface thereof. A window 62 is formed. As shown in FIGS. 3 and 4, in the optical system holder 61, when roughly classified, the optical axes of the transmitted light vertically incident from above through the incident window 62 are bent in two horizontal directions, and the first optical path 90 ( (See FIG. 3) and the second optical path 100
(See FIG. 5), the optical path branching means 80 for switching to
First and second optical systems 91 and 101, which are respectively arranged in the second optical paths 90 and 100 and which have upper and lower stages of different magnifications, are provided.
The focusing means 110 for focusing 01, the optical path branching means 80, and the focusing means 110 are driven 1
And a step motor 120 as one driving means.

As shown in FIGS. 3 and 5, the optical path branching means 80 is composed of two first and second reflecting mirrors 81 and 82. The first reflection mirror 81, as shown in FIG.
The optical axis of the transmitted light, which is fixed to the lower side of the optical system holder 61 and vertically incident from above through the entrance window 62, is bent at a right angle direction and further toward the front direction where the insertion port 31 of the case 30 is located.

As shown in FIGS. 3 and 5, the second reflecting mirror 82 is arranged between the entrance window 62 and the first reflecting mirror 81, and is rotatable with respect to the optical system holder 61 via a mirror frame 83. As the mirror frame 83 is pivotally supported and swivels, the mirror frame 83 appears and disappears in the optical path of the transmitted light entering from the entrance window 62. The mirror frame 83 is
As shown in FIGS. 3 and 4, a U-shaped cross section is formed, and both ends of the U-shaped section are bent inward. Further, inside the mirror frame 83, a mirror fixing plate 84 to which the second reflecting mirror 82 is fixed is held movably in the thickness direction of the mirror frame 83.

Then, as shown in FIGS. 3 and 4, one end of the mirror frame 83 has an optical system holder via a fixed shaft 85.
It is pivotally supported by 61. A compression spring 86 is provided between the mirror frame 83 and the mirror fixing plate 84 at the other free end of the mirror frame 83.
The spring force of the compression spring 86 causes the mirror fixing plate 84 to elastically contact the inner surface of the bent end portion 87 of the mirror frame 83. As shown in FIG. 4, a torsion spring 88 is provided on the fixed shaft 85 of the mirror frame 83, and the spring force of the torsion spring 88 causes the second reflecting mirror 82 to normally move as shown in FIG. It rotates in a direction away from the optical path of the transmitted light entering from the entrance window 62.

Within the rotation range of the mirror frame 83, as shown in FIGS. 3 to 5, a pair of left and right angle limiting members 89, 89 are provided, and both angle limiting members 89 are mirrors of the second reflecting mirror 82. At the position where the fixed plate 84 abuts, the second reflection mirror 82 projects into the optical path of the transmitted light entering from the entrance window 62. And
As shown in FIG. 5, the transmitted light is reflected by the second reflecting mirror 82, and its optical axis is bent in a direction perpendicular to the front direction in which the insertion port 31 of the case 30 is located.

The first optical system 91, as shown in FIG.
A first image forming lens 92 as a first image forming means for forming an image of the transmitted light reflected by the first reflecting mirror 81, and an image reading means for reading the image formed by the first image forming lens 92 are configured. The first sensor 93 is provided. As shown in FIG. 5, the second optical system 101 forms an image of the transmitted light reflected by the second reflecting mirror 82 and has a magnification larger than that of the first image forming lens 92 and serves as a second image forming means. A second image forming lens 102 and a second sensor 103 which constitutes an image reading means for reading an image formed by the second image forming lens 102 are provided.

For the first and second sensors 93 and 103, for example, C
A CD type line sensor is used. Therefore, the first optical system 91 is used for the film original 20 having a size of 4 inches × 5 inches because the magnification of the first imaging lens 92 is smaller than that of the second imaging lens 102. On the other hand, the second optical system 101 is used for a so-called 35 mm size film original 20 because the magnification of the second imaging lens 102 is larger than that of the first imaging lens 92.

As shown in FIGS. 3 and 4, the focusing means 110 is fixed in the optical system holder 61 and has a pair of left and right guide rails 111 and 111 extending in the front-rear direction of the case 30.
A moving base for focusing on which the first and second optical systems 91 and 101 are fixed while sliding along both guide rails 111.
It is composed of 112 and. The moving table for focusing 112
As shown in FIG. 3, it has first and second surfaces 113 and 114 which are vertically opposed to each other. Then, although not shown, on the first surface 113 side facing downward of the focusing base 112,
For example, it has a rolling bearing such as a linear ball bearing, and slides on the guide rail 111 via this bearing.

As shown in FIG. 3, the first image-forming lens 9 is formed on the first surface 113 of the focusing movable table 112 facing downward.
The distance between the first sensor 93 and the second sensor 93 is fixed and fixed. Further, the second surface 114 facing upward is fixed while keeping the distance between the second imaging lens 102 and the second sensor 103 constant. Therefore, the first and second imaging lenses
Since the distances between 92 and 102 and the first and second sensors 93 and 103 are fixed, the magnifications of the first and second optical systems 91 and 101 are also fixed.

Further, by moving the focusing base 112 along the left and right guide rails 111, both the first and second guide rails 111 are moved.
The optical systems 91 and 101 can be moved at the same time. Therefore, the movement of the focusing movable base 112 enables the focusing of both the first and second optical systems 91 and 101. That is,
By moving the focusing movable table 112, the distance between the film original 20 held by the original holder 21 and the first and second imaging lenses 92, 102 is changed, respectively, and both the first and second optical systems 91, 101 are changed. Is focusing on.

In particular, when the slide mount is used as it is as the original holder 21, the thickness of the original may vary, and the position of the image surface of the film original 20 may move in the optical axis direction. For this reason, the deviation of the focus due to the variation in the thickness of the slide mount causes
The distances from the 20 image planes to the first and second imaging lenses 92 and 102 are respectively changed to correct and focus.

As shown in FIGS. 3 and 4, the step motor 120 is fixed in the optical system holder 61, and is connected to the focus moving base 112 by a transmission lead screw as a driving force transmission means. 121 is provided. Although the step motor 120 is used as the driving means, other DC / AC motors may be used. Lead screw 121 for transmission
Are arranged in the left and right centers of the focusing base 112 as shown in FIGS.
A transmission gear 123 meshing with 22 is fixed.

A nut 124 is screwed into the transmission lead screw 121 as shown in FIGS.
As shown in FIGS. 3 and 4, the nut 124 is in contact with the rear end surface of the focusing movable base 112, and its rotation is restricted by the rotation limiting member 125 (FIG. 4) protruding from the focusing movable base 112. ing.

The focusing movable table 112 is shown in FIG.
As shown in FIG. 4, the gap adjusting member 126 is fixed at the contact position with the nut 124. By changing the thickness of the space adjusting member 126, the contact position between the focusing movable base 112 and the nut 124 can be adjusted. This is to correct variations due to processing / assembly accuracy of lenses and mechanical parts. Further, as shown in FIG. 4, tension springs 127 and 127 as a pair of biasing means which are symmetrically arranged so as to sandwich the transmission lead screw 121 are mounted on the left and right sides of the focusing base 112. ing.

As shown in FIG. 4, one end of each of the left and right tension springs 127 is fixed to the left and right of the focusing movable base 112, and each of the other ends is fixed to the optical system holder 61.
It is fixed to each. For this reason, the moving table for focusing
The space adjusting member 126 of 112 is urged by the spring restoring force of the left and right tension springs 127 so as to always contact the nut 124. Then, when the transmission lead screw 121 is rotated via the step motor 120, the position of the nut 124 moves in the front-rear direction, so that the focusing movable base 112 slides following the nut 124.

Although the rotational force of the step motor 120 is converted into linear motion by the transmission lead screw 121 and the nut 124, other link mechanism or cam mechanism may be used.
Also, the tension spring 127 was used as the biasing means,
Other compression coil springs or leaf springs may be used. on the other hand,
As shown in FIG. 4, the optical system holder 61 is fixed with a stopper 128 for restricting the rearmost retreat position of the focusing movable base 112, and the rear end surface of the focusing movable base 112 contacts the stopper 128. Thus, the rearmost retracted position of the focusing movable base 112 is restricted.

Therefore, when the transmission lead screw 121 is further rotated at the position where the focusing movable base 112 abuts on the stopper 128, the nut 124 moves the focusing movable base 112 as shown in FIGS. Away from the space adjusting member 126. At this time, the transmission of the driving force between the step motor 120 and the focusing base 112 is interrupted. Further, as shown in FIG. 4, a position sensor 129 such as a limit sensor is arranged at the most retracted position of the nut 124.
The origin position of the step motor 120 is determined by the detection signal from the.

On the other hand, between the focusing movable base 112 and the second reflecting mirror 82, as shown in FIGS. 3 and 4, the motive force of the focusing movable base 112 is transmitted to the second reflecting mirror 82. A pair of left and right connecting members 130 as connecting means are provided. As shown in FIGS. 3 and 4, the left and right connecting members 130 each have a connecting pin 131 at one end and a moving shaft 1 at the other end.
32 are provided respectively.

Each connecting pin 131 of the above left and right connecting members 130
As shown in FIGS. 3 and 4, the pair of left and right support members 115, 115 projecting in a tongue shape from the second surface 114 of the focusing movable base 112 facing upward are pivotally supported. That is,
As shown in FIGS. 3 and 4, the left and right support members 115 are each provided with elongated holes 116 extending in the horizontal direction. And
The respective connecting pins 131 of the left and right connecting members 130 are respectively passed through the respective elongated holes 116 so that they can move along the respective elongated holes 116.

Further, each moving shaft 1 of the left and right connecting members 130
As shown in FIGS. 3 and 4, 32 are axially supported by the mirror frame 83 of the second reflecting mirror 82. For this reason, as shown in FIGS. 3 and 4, when the connecting pins 131 of the left and right connecting members 130 are positioned at the center of the left and right oblong holes 116 of the focusing base 112 in the longitudinal direction, the focusing is performed. Even if the movable table 112 slightly slides in the front-rear direction, the connecting pin 131 only moves in the elongated hole 116, and the left and right connecting members 130 do not move.

The above moving range is the focusing moving range of the first optical system 91. At this time, the second reflection mirror
82 is separated from the optical path of the transmitted light entering from the entrance window 62 by the spring force of the torsion spring 88, and the optical path thereof is the first optical system 91.
Has been switched to. On the other hand, the connecting pin 131 has a long hole 1
When the moving base 112 for focusing further retracts with the rear end of the dead end 16 abutting, as shown in FIG.
The left and right connecting members 130 are also retracted by being pushed by the rear end of 16.

Therefore, the moving shafts 132 of the left and right connecting members 130 are
As shown in FIG. 5, the mirror frame 83, which is pivotally supported by, rotates counterclockwise about the fixed shaft 85 against the spring force of the torsion spring 88. Thus, at the position where the mirror frame 83 swivels and the mirror fixing plate 84 contacts the angle limiting member 89, the second reflecting mirror 82 projects into the optical path of the transmitted light entering from the entrance window 62, and the optical path becomes the second path. Switch to the optical system 101.

This retracted position is the movement range for switching the optical path of the second reflecting mirror 82. When the moving base 112 for focusing further retracts, the connecting pin 131 is pushed against the rear end of the long hole 116 and is pushed by the rear end of the long hole 116, so that the left and right connecting members 1
The 30 will move back further. At this time, as the left and right connecting members 130 move backward, the moving shafts 132 also move backward, so that the mirror frame 8
Although 3 further rotates in the clockwise direction, since the mirror fixing plate 84 is in contact with the angle limiting member 89, the compression spring 86 elastically contracts to absorb the amount of movement of each moving shaft 132.

Therefore, the mirror fixing plate 84 is the angle limiting member.
Since it is in contact with 89, the angle of the second reflecting mirror 82 does not change, and only the focusing movable base 112 retracts.
The moving range is the focusing moving range of the second optical system 101. Further, when the moving table 112 for focusing moves backward, the compression spring 86 further elastically contracts, but at this time, as shown in FIG. 7, the rear end surface of the moving table 112 for focusing contacts the stopper 128.

When the lead screw 121 for transmission is still rotated, the nut 124 is separated from the gap adjusting member 126 of the moving base 112 for focusing as shown in FIGS. 6 and 7, and transmission of the driving force is cut off. The rearmost retracted position of the focusing movable base 112 is the transportation movable range. As described above, the focusing base 112 has four moving ranges, that is, the first optical system 9
It has a focusing movement range 1, an optical path switching movement range, a focusing movement range of the second optical system 101, and a transportation movement range.

That is, as shown in FIG. 7, the position where the nut 124 hits the position sensor 129 is the origin position. Then, at the origin position, the nut 124 is in the movement range for transportation away from the distance adjusting member 126 of the focusing movable base 112, and the forward movement of the nut 124 causes the second optical system 101 to move.
Focusing movement range, optical path switching movement range, first
Move to the focusing movement range of the optical system 91.

In this way, the transport moving range is specifically excluded from the both focusing moving ranges in order to maintain the moving accuracy of the focusing moving base 112 in the focus adjusting range. Further, in the transportation range, the transmission of the driving force from the step motor 120 to the focusing base 112 is cut off, so that the load on the step motor 120 due to vibration during transportation can be reduced.

Further, in the moving range for transportation, the compression spring 86 is elastically contracted, so that the mirror fixing plate 84 of the second reflecting mirror 82 is strongly pressed against the angle limiting member 89. It is possible to prevent rattling during transportation of 82. Although the second reflecting mirror 82 is swung via the left and right connecting members 130, the second reflecting mirror 82 may be swung using another different link mechanism or cam mechanism.

Next, the tension spring 127 and the torsion spring 8
8. The force relationship between the three types of springs, the compression spring 86, will be described. Including the transmission efficiencies of components other than the three types of springs, for example, the force of the tension spring 127 is F1, the force of the torsion spring 88 is F2, and the force of the tension spring 88 is F2. If the force of the compression spring 86 is F3,
The following relational expression is satisfied. At this time, the mirror fixing plate 84
Is assumed to be in contact with the angle limiting member 89.

[0088]

[Formula 1] F1> F2 + F3 Relational expression (1) Next, focusing on the force applied to the mirror fixing plate 84, the following relational expression is satisfied. At this time, it is assumed that the mirror fixing plate 84 is in contact with the angle limiting member 89.

[0089]

[Formula 2] F3> F2 Relational expression (2) Here, “F1” on the left side of the relational expression (1) is the force for retracting the focusing movable base 112 and “F2 + F3” on the right side.
On the contrary, each means a force for moving the focusing movable base 112 forward.

Further, "F3" on the left side of the relational expression (2) is
The force for turning the mirror fixing plate 84 clockwise about the fixing shaft 85, and "F2" on the right side, on the contrary, means the force for turning the mirror fixing plate 84 counterclockwise. Therefore, according to the relational expression (1), the mirror fixing plate 84 is the angle limiting member.
It can be seen that, since the force of the tension spring 127 is superior even after the contact with the 89, the state where the distance adjusting member 126 of the focusing movable base 112 contacts the nut 124 can be maintained.
When driving the nut 124, the step motor 120
Is a difference obtained by subtracting “F2 + F3” from “F1”, and the focusing movable base 112 can be moved. Also, the mirror fixing plate 8
Since "F3" has not occurred before 4 contacts the angle limiting member 89, the step motor 120 can move the focusing movable base 112 by the difference obtained by subtracting "F2" from "F1". .

From the relational expression (2), the mirror fixing plate 84
It is possible to prevent the compression spring 86 from being elastically contracted when it comes into contact with the angle limiting member 89. On the other hand, a pair of left and right air intake holes 32, 32 are provided on the left and right side surfaces of the case 30, as shown in FIG. Further, an exhaust fan 33 is provided inside the case 30 on the back side of the light source 41, and heat generated from the light source 41 in the case 30, the power supply unit 70, etc. is exhausted to the outside of the case 30.

Next, a procedure for using the image input device 10 having the above-described configuration will be described. For example, 4 inches x
In the case of a 5-inch size film original 20, as shown in FIG. 3, the optical path branching means 80 switches to the first optical path 90. As shown in FIG. 3, the transmitted light of the film original 20 is reflected by the first reflecting mirror 81 and then imaged on the first sensor 93 via the first imaging lens 92 to form an image of one line. The reading is done.

Then, while moving the focusing moving table 112 within the focusing moving range of the first optical system 91, the difference in the contrast of the read image is used to adjust the focusing position to the optimum focusing position. The moving table 112 is stopped.
After focusing, the film original 20 is moved in the sub-scanning direction via the original scanning means 52, so that the image of the film original 20 is two-dimensionally read.

On the other hand, in the case of a so-called 35 mm size, as shown in FIG. 5, the focus moving base 112 is moved to the optical path switching movement range, and the optical path branching means 80 switches to the second optical path 100. Therefore, as shown in FIG. 5, the transmitted light of the film original 20 is reflected by the second reflecting mirror 82 and then is imaged on the second sensor 103 via the second imaging lens 102 to form one line. The image is read.

Then, while moving the focusing moving base 112 within the focusing moving range of the second optical system 101, the contrast difference of the read image is utilized to
The focus moving base 112 is stopped at the optimum focus position. On the other hand, at the time of transportation, as shown in FIGS. 6 and 7, the focusing base 112 is moved to the transportation range.

FIG. 8 shows a second embodiment of the present invention, which is a conceptual explanatory view of the optical path branching means of the first and second optical systems. The second embodiment is generally the same as that of the first embodiment described above with reference to FIGS. The difference is that the connecting member 140 is pivotally supported at the rear end portion of the movable table 112 to which the first and second optical systems 91 and 101 are fixed, that is, the right end portion in FIG. 8, and the second reflection mirror is provided at the tip portion thereof. It is at the point where the 82 is pivotally supported.

In the description of the second embodiment, the same components as those in the first embodiment described above will be designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 8, the position of the moving base 112 before the movement is shown by a solid line, and the position after the movement is shown by a dotted line. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the second embodiment, like the first embodiment, the focus of the first and second optical systems 91 and 101 can be adjusted by moving the movable table 112. Also, the moving table 112
However, at the position indicated by the solid line in FIG. 8, the second reflecting mirror 82 pivotally supported by the connecting member 140 is separated from the optical path of the transmitted light that has passed through the film original 20, and the transmitted light is the first reflective mirror. It is reflected by 81 and travels along the first optical path 90.

On the other hand, when the movable table 112 retracts to the position shown by the dotted line in FIG. 8, the second reflecting mirror 82 pivotally supported by the connecting member 140 causes the optical path of the transmitted light transmitted through the film original 20. Projecting inward, the transmitted light is reflected by the second reflecting mirror 82 and switched to the second optical path 100. In addition, in the second embodiment, the movement of the movable table 112 causes the first and second movements.
Although the focus adjustment of the optical systems 91 and 101 and the branching of the first and second optical paths 90 and 100 have been performed, the focus of the first and second optical systems 91 and 101 can be obtained by driving the connecting member 140 by a drive source separate from the moving base 112. The adjustment and the switching of the first and second optical paths 90 and 100 may be performed independently.

FIG. 9 shows a third embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the first and second optical systems. The feature of the fifth embodiment is that
The second reflecting mirror of the second embodiment described above with reference to FIG.
As shown in FIG. 9, 82 is adapted to be movable in parallel with the movable table 112.

That is, as shown in FIG. 9, the first and second
The mirror fixing portion 150 of the second reflecting mirror 82 is provided at the rear end of the movable table 112 to which the optical systems 91 and 101 are fixed, that is, at the right end in FIG. Then, on the mirror fixing unit 150,
The second reflecting mirror 82 is fixed so as to maintain an angle of 45 degrees with respect to the optical axis of the transmitted light that has passed through the film original 20.

In the description of the third embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 9, the position of the movable table 112 before the movement is shown by a solid line, and the position after the movement is shown by a dotted line. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the third embodiment, the focus adjustment of the first and second optical systems 91 and 101 is possible by moving the movable table 112, as in the second embodiment. Also, the moving table 112
However, at the position indicated by the solid line in FIG.
The second reflection mirror 82 fixed at 0 is separated from the optical path of the transmitted light that has passed through the film original 20, and the transmitted light is reflected by the first reflective mirror 81 and travels along the first optical path 90.

On the other hand, when the movable table 112 retracts to the position shown by the dotted line in FIG. 9, the second reflecting mirror 82 fixed to the mirror fixing portion 150 causes the optical path of the transmitted light transmitted through the film original 20. A second reflection mirror that projects inward and transmits the transmitted light.
It is reflected by 82 and switches to the second optical path 100. According to the third embodiment, unlike the second embodiment, the rotation angle of the second reflecting mirror 82 does not have to be changed, and the connecting member 140 pivotally supported by the moving table 112 is unnecessary. Therefore, there is an advantage that the number of parts can be reduced and the structure of the optical path branching unit 80 can be simplified.

FIG. 10 shows a fourth embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the first and second optical systems. The feature of the fourth embodiment is that the two first and second reflecting mirrors 81 and 82 of the second and third embodiments described above with reference to FIGS. The point is that it is composed of two reflection mirrors 160.

That is, the image input device 10 according to the fourth embodiment, as shown in FIG.
Optical path switching rack 161 with 0 fixed, and first and second optical systems
A focus adjustment rack 162 integrally fixed to a movable table 112 having 91, 101 and both racks 161, 162 are engaged,
The driving gear 163 is rotated by a stepping motor as a driving means (not shown).

As shown in FIG. 10, the optical path switching rack 161 moves up and down in parallel with the optical axis of the transmitted light that has passed through the film original 20. Then, the optical path switching rack 16
At the upper end of 1, the reflection mirror 160 is provided so as to maintain an angle of 45 degrees with respect to the optical axis of the transmitted light passing through the film original 20.
Has been fixed. The lower end of the optical path switching rack 161 is engaged with the small diameter gear 164 of the drive gear 163.

The rear end portion of the optical path switching rack 161 of the focus adjusting rack 162, that is, the right end portion in FIG. 10, crosses the optical path switching rack 161 in a cross shape, and the focus gear rack 163 of the drive gear 163. It meshes with the large diameter gear 165. In addition,
In the description of the fourth embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and description thereof will be omitted. Further, in FIG. 10, an optical path switching rack 161 is shown.
The positions of the focus adjustment rack 162 and the focus adjustment rack before the movement are shown by solid lines, and the positions after the movement are shown by dotted lines. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the fourth embodiment, when the drive gear 163 rotates, the focus adjusting rack 162 that meshes with the large diameter gear 165 moves, so that the focus adjustment of the first and second optical systems 91 and 101 is performed. Be seen. At the same time, the small diameter gear 164 of the drive gear 163 rotates, so that the rack for optical path switching 161 that meshes with the small gear 164 rotates.
Moves up and down.

First, when the optical path switching rack 161 is at the position shown by the solid line in FIG. 10, the transmitted light that has passed through the film original 20 is reflected by the reflection mirror 160 and travels along the first optical path 90. On the other hand, the optical path switching rack 161 is shown in FIG.
When it reaches the position of the dotted line shown in 0, the film original 20
The transmitted light that has passed through is reflected by the reflection mirror 160, and the optical path is switched to the second optical path 100.

According to the fourth embodiment, as compared with the second and third embodiments described above with reference to FIGS. 8 and 9, only one reflecting mirror 160 is required, and the number of parts is reduced. There is an advantage that the number can be reduced and the structure of the optical path branching unit 80 can be further simplified.
The small-diameter gear 164 and the large-diameter gear 165 are integrally rotated. However, by selectively rotating both gears 164 and 165 with a clutch, the focus adjustment of the first and second optical systems 91 and 101 and the first optical system 91 and 101 are performed. ,
The switching of the second optical paths 90 and 100 may be performed independently.

FIGS. 11 and 12 show fifth and sixth embodiments of the present invention, and FIG. 11 shows a fifth embodiment of the present invention, and first and second optical systems corresponding to FIG. 12 is a conceptual explanatory view of the optical path branching means of FIG. 12, and FIG. 12 is a conceptual explanatory view of the optical path branching means of the first and second optical systems corresponding to FIG. The fifth and sixth embodiments are different from the first to fourth embodiments described above in the following points.

That is, in the first to fourth examples described above, the first and second optical systems 91 and 101 are arranged in parallel in the vertical direction. On the other hand, in the fifth and sixth embodiments, as shown in FIG.
As shown in FIG. 12, the first and second optical systems 91 and 101 are arranged in a straight line in the front-rear direction, that is, in the left-right direction in FIGS.

Next, the difference between the fifth and sixth embodiments is that
The next point. That is, in the fifth embodiment, as shown in FIG. 11, one reflecting mirror 170 having reflecting surfaces on the front and back sides is used as the optical path branching means, and the reflecting mirror 170 is rotated about the rotation axis 171. Then, the first and second optical paths 90,
Switching 100. On the other hand, the sixth embodiment is common in that it uses one reflecting mirror 180 as an optical path branching means, as shown in FIG.
The reflecting mirror 180 of the embodiment has a reflecting surface on the front and rear, that is, a slope inclined to the left and right in FIG. 12, and the first and second optical paths 90 and 100 are switched by sliding the reflecting mirror 180.

First, the fifth embodiment will be described with reference to FIG. The first and second optical systems 91 and 101 are symmetrically arranged on the front and rear sides of the movable table 112 that slides back and forth, that is, on the left and right sides in FIG. The above moving table 112
11 slides in a direction orthogonal to the optical axis of the transmitted light that has passed through the film original 20, as shown in FIG.

As shown in FIG. 11, the reflection mirror 170 has first and second reflection surfaces 171 and 172 on its front and back surfaces, and a rotary shaft 173 at the lower end thereof is located substantially at the center in the longitudinal direction of the movable table 112. Support. The reflecting mirror 170 is moved along with the slide of the moving table 112, as shown by the solid line and the dotted line in FIG.
It revolves around the support shaft 174. In the description of the fifth embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and description thereof will be omitted. Further, in FIG. 11, the position of the movable table 112 before movement is indicated by a solid line,
The position after movement is indicated by a dotted line. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the fifth embodiment, the slide of the movable table 112 causes the first and second optical systems 9 to move as shown in FIG.
Focus adjustment of 1,101 is possible. Further, when the movable table 112 is at the position shown by the solid line in FIG. 11, the transmitted light that has passed through the film original 20 is reflected by the first reflecting surface 171 of the reflecting mirror 170 and travels along the first optical path 90.

On the other hand, when the movable table 112 retreats to the position indicated by the dotted line in FIG. 11, the reflection mirror 170 pivots around its rotation axis 173, so that the transmitted light transmitted through the film original 20 becomes Second reflecting surface 1 opposite to the reflecting mirror 170
It is reflected by 72 and the optical path is switched to the second optical path 100. According to the fifth embodiment, as with the fourth embodiment described above with reference to FIG. 10, since only one reflecting mirror 170 is required, the number of parts can be reduced and the structure of the optical path branching means 80 can be reduced. There is an advantage that it can be further simplified.

Next, the sixth embodiment will be described with reference to FIG. The reflection mirror 170 of the sixth embodiment is shown in FIG.
As shown in FIG. 2, the roof shape is formed, and the first and second reflecting surfaces 181, 182 are provided on the front and rear surfaces thereof, that is, on the inclined surfaces that are inclined to the left and right in FIG. Then, the bottom portion of the reflection mirror 170 is fixed to the movable table 112 substantially at the center in the longitudinal direction. The first and second inclined surfaces 181 and 182 are held so as to maintain an angle of 45 degrees with respect to the optical axis of the transmitted light that has passed through the film original 20.

In the description of the sixth embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 12, the position of the moving base 112 before the movement is shown by a solid line, and the position after the movement is shown by a dotted line. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the sixth embodiment, by sliding the movable table 112, as shown in FIG. 12, the first and second optical systems 9 are
Focus adjustment of 1,101 is possible. Further, when the movable table 112 is at the position shown by the solid line in FIG. 12, the transmitted light transmitted through the film original 20 is reflected by the first reflection surface 181 of the reflection mirror 180 and travels along the first optical path 90.

On the other hand, when the movable table 112 retreats to the position of the dotted line shown in FIG. 12, the second reflecting surface 182 on the opposite side of the reflecting mirror 180 enters the optical path of the transmitted light which has passed through the film original 20. Appearing, the transmitted light is reflected by the second reflecting surface 182 on the opposite side of the reflecting mirror 180, and the optical path is switched to the second optical path 100. According to the sixth embodiment, as compared with the fifth embodiment described above with reference to FIG. 11, the reflection mirror 18
Since it is only necessary to fix 0, the number of parts can be reduced, and there is an advantage that the structure of the optical path branching unit 80 can be further simplified.

13 and 14 show the seventh and eighth embodiments of the present invention, and FIG. 13 shows the seventh embodiment of the present invention, and the first and second optical systems corresponding to FIG. 14 is a conceptual explanatory view of the optical path branching means of FIG. 14, and FIG. 14 is a conceptual explanatory view of the optical path branching means of the first and second optical systems corresponding to FIG. The seventh and eighth embodiments differ from the first to sixth embodiments described above in the following points.

That is, in both the seventh and eighth embodiments, FIG.
As shown in FIGS. 3 and 14, the first and second optical systems 91 and 101 are
The film originals 20 are arranged at different angles with respect to the optical axis of the transmitted light. Next, different points between the seventh and eighth embodiments are as follows. That is, in the seventh embodiment, as shown in FIG. 13, one reflecting mirror 190 as an optical path branching unit is turned around its supporting shaft 193 to switch between the first and second optical paths 90 and 100. There is.

On the other hand, in the eighth embodiment, as shown in FIG. 14, the optical axes of the first and second optical paths 90 and 100 are intersected with each other, and the intersection is common to the first and second optical systems 91 and 101. One common sensor 200 is arranged. Using FIG. 13, the seventh
Examples will be described first. First, on the moving table 112,
As shown in FIG. 13, only the first optical system 91 is fixed. The second optical system 101 is fixed to a fixed base 192 which is fixed at a predetermined angle with respect to the movable base 112.

Then, one reflecting mirror 190 is pivotally supported with a rotary shaft 191 at the rear end of the movable table 112, that is, the left end in FIG. Then, as shown by the solid line and the dotted line in FIG. 13, the reflection mirror 190 rotates around the support shaft 193 as the movable table 112 slides. In the description of the seventh embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and description thereof will be omitted. In addition, in FIG.
The position before the movement is indicated by a solid line, and the position after the movement is indicated by a dotted line. Furthermore, the first optical path 90 before movement is indicated by a two-dot chain line,
The second optical path 100 after the movement is illustrated by a three-dot chain line.

According to the seventh embodiment, the focus of the first optical system 91 can be adjusted by sliding the movable table 112, as shown in FIG. Further, as the movable table 112 slides, the reflection mirror 190 and the second imaging lens 10 of the second optical system 101 are moved.
The focus of the second optical system 101 can be adjusted by changing the distance between the second optical system 101 and the second optical system 101. The fixed base 192 itself for fixing the second optical system 101 may be slid to adjust the focus of the second optical system 101.

Further, when the movable table 112 is at the position shown by the solid line in FIG. 13, the transmitted light which has passed through the film original 20 is reflected by the reflection mirror 190 and travels along the first optical path 90.
On the other hand, when the movable table 112 slides a little, as shown in FIG.
As indicated by the dotted line in FIG.
By turning around, the transmitted light that has passed through the film original 20 is reflected by the turning reflection mirror 190, and the optical path is switched to the second optical path 100.

According to the seventh embodiment, first, referring to FIGS.
Similar to the fourth to sixth embodiments described using, the number of parts can be reduced because only one reflecting mirror 190 is required.
There is an advantage that the structure of the optical path branching means 80 can be further simplified. Next, the eighth embodiment will be described with reference to FIG. First, as shown in FIG. 14, on the movable table 112, the first imaging lens 92 of the first optical system 91 and the first and second optical systems 9 are provided.
One common sensor 200 common to 1,101 is fixed.
In addition, the second imaging lens 102 of the second optical system 101 includes the movable table 11
It is fixed to a fixed base 201 which is fixed at a predetermined angle with respect to 2.

As shown in FIG. 14, the common sensor 200 is fixed to the front end portion of the movable table 112, that is, the left end portion in FIG. In addition, the rear end of the movable table 112, that is, FIG.
A mirror fixing portion 203, which is bent upward in an L-shape toward the upper side toward 4, and has a second reflection mirror 82 fixed thereto, is provided at an upper end portion thereof. Then, the mirror fixing unit 203
In addition, the second reflecting mirror 82 is fixed so as to maintain an angle of 45 degrees with respect to the optical axis of the transmitted light which has passed through the film original 20.

In the description of the eighth embodiment, the same components as those of the first embodiment described above will be designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 14, the position of the moving base 112 before the movement is shown by a solid line, and the position after the movement is shown by a dotted line. Further, the first optical path 90 before the movement is shown by a chain double-dashed line, and the second optical path 100 after the movement is shown by a three-dot chain line.

According to the eighth embodiment, the focus of the first optical system 91 can be adjusted by sliding the movable table 112, as shown in FIG. Further, when the movable table 112 is at the position shown by the solid line in FIG. 14, the transmitted light transmitted through the film original 20 is reflected by the first reflecting mirror 81 and travels along the first optical path 90. Therefore, the reflected light is imaged on the common sensor 200 by the first imaging lens 92 of the first optical system 91.

On the other hand, when the movable table 112 slides, it moves forward to the position shown by the dotted line in FIG. 13, and the second reflecting mirror 82 fixed to the mirror fixing portion 203 thereof transmits the light transmitted through the film original 20. Of the transmitted light is reflected by the second reflection mirror 82 and switched to the second optical path 100. The reflected light is imaged on the common sensor 200 by the first imaging lens 102 of the second optical system 101.

According to the eighth embodiment, the first and second optical systems are
Since only one sensor 91, 101 is required, there is an advantage that the number of parts can be reduced and the structures of the first and second optical systems 91, 101 can be simplified.

[0135]

Since the present invention is constituted as described above, it has the following effects. Claim 1
According to the invention, two optical systems having different magnifications are prepared according to two originals having different sizes, and both optical systems are switched so that two originals having different sizes can be read at appropriate magnifications. It is possible to provide the image input device.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, by arranging the two optical systems in parallel, the branching of the optical path and the easy focusing can be achieved. An image input device can be provided. According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the optical path branching means is composed of two reflecting mirrors, so that the structure of the optical path branching means can be simplified and downsized. A possible image input device can be provided.

According to the invention described in claim 4, in addition to the effect of the invention described in claim 2, the optical path branching means is composed of one reflecting mirror, so that it is compared with the invention described in claim 3. It is possible to provide an image input device capable of further simplifying the structure of the optical path branching unit and further reducing the size thereof. According to the invention of claim 5, the above-mentioned claim 1
In addition to the effects of the invention described above, by arranging the two optical systems on a straight line, it is possible to provide an image input device capable of branching the optical path and facilitating focusing.

According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the optical path branching means is composed of one reflecting mirror, thereby simplifying the structure of the optical path branching means, and An image input device that can be downsized can be provided. According to the invention described in claim 7, in addition to the effect of the invention described in claim 1, by arranging the two optical systems with a predetermined angle, branching of the optical path and facilitation of focusing can be facilitated. A possible image input device can be provided.

According to the invention described in claim 8, in addition to the effect of the invention described in claim 7, by constructing the optical path branching means from one reflecting mirror, the structure of the optical path branching means is simplified, and An image input device that can be downsized can be provided. According to the invention of claim 9, in addition to the effect of the invention of claim 7, the two optical systems have a common sensor, so that the total number of parts of both optical systems can be reduced. An image input device can be provided.

According to the invention described in Item 10, in addition to the effect of the invention described in Item 1, it is possible to provide an image input apparatus capable of focusing.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an image input device.

FIG. 2 is an external perspective view of an image input device.

FIG. 3 is an enlarged vertical sectional view of an optical system holder.

FIG. 4 is a schematic horizontal sectional view of the image input device.

FIG. 5 is an enlarged vertical sectional view of the optical system holder, which corresponds to FIG. 3 and shows a switching state of the reflection mirror.

FIG. 6 is an enlarged vertical sectional view of the optical system holder during transportation, which corresponds to FIG.

FIG. 7 is a partial schematic horizontal cross-sectional view of the optical system holder during transportation, which corresponds to FIG.

FIG. 8 shows a second embodiment of the present invention and is a conceptual explanatory view of an optical path branching means of the second optical system.

9 shows a third embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 10 shows a fourth embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 11 shows a fifth embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 12 shows a sixth embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 13 shows a seventh embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 14 shows an eighth embodiment of the present invention, which corresponds to FIG. 8 and is a conceptual explanatory view of the optical path branching means of the second optical system.

FIG. 15 is a schematic horizontal sectional view of a conventional image input device.

FIG. 16 is an external perspective view of a conventional image input device.

[Explanation of symbols]

10 Image input device 20 Slide film (original) 21 Document holder 30 Case 31 Insert port 32 Air intake hole 33 Exhaust fan 40 Original illumination unit 41 Light source (illumination means) 41a Concave mirror 42 Heat ray absorption filter 43 Diffuser 44 Color filter 45 First illumination lens 46 Second illumination lens 47 First illumination mirror 48 Second illumination mirror 49 Third illumination mirror 50 Original scanning unit 51 Stage 52 Original scanning means 53 Stage motor 54 Scanning lead screw 55 Screw cylinder 60 Original reading section 61 Optical system holder 62 Entrance window 70 Power supply section 80 Optical path branching means 81 First reflection mirror 82 Second reflection mirror 83 Mirror frame 84 Mirror fixing plate 85 Fixed shaft 86 Compression spring 87 Bending end 88 Torsion spring 89 Angle Limiting member 90 First optical path 91 First optical system 92 First imaging lens (first imaging means constituting imaging means) 93 First sensor 100 Second optical path 101 Second optical system 102 Second imaging lens ( Imaging Second image forming means forming a step) 103 Second sensor 110 Focusing means 111 Guide rail 112 Moving base 113 First surface 114 Second surface 115 Support member 116 Slot 120 Step motor (driving means) 121 Transmission lead screw (Transmission means) 122 Drive gear 123 Transmission gear 124 Nut 125 Rotation limiting member 126 Spacing adjustment member 127 Extension spring (biasing means) 128 Stopper 129 Position sensor 130 Connection member (connection means) 131 Connection pin 132 Moving shaft 140 Connection member 150 Mirror fixed part 160 Reflection mirror 161 Rack for optical path branch 162 Focusing rack 163 Drive gear 164 Small gear 165 Large gear 170 Reflection mirror 171 1st reflection surface 172 2nd reflection surface 173 Rotation axis 174 Spindle 180 Reflection mirror 181 1st 1 Reflection surface 182 2nd reflection surface 190 Reflection mirror 191 Rotation axis 192 Fixed stand 193 Spindle 200 Common sensor 201 Fixed stand 202 Sensor support stand 203 Mirror fixed part 210 Slide film 211 Slide holder 212 Stage 213 Guide rail 214 Screw cylinder 220 Light source 220a Concave mirror 221 Color filter group 222 Lens group 223 Reflective mirror 224 Imaging lens 225 CCD 226 Optical system support member 227 Screw cylinder 230 Film scanning mechanism 231 Stage motor 232 Scanning lead Screw 240 Focusing mechanism 241 Focus adjustment motor 242 Focus adjustment lead screw 250 Case 251 Recess 252 Air intake hole 253 Exhaust fan 254 Power supply

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Claims (10)

[Claims] 1. A document holder for holding a document, illumination means for illuminating an image of the document held by the document holder, and reflected light / transmitted light incident through the document illuminated by the illumination means. Is arranged in the first optical path branched by the optical path branching means, and an optical path branching means for branching the light into two directions of a first optical path and a second optical path is formed. Imaging means,
And a first optical system having a first sensor for reading an image formed by the first image forming means, and a first image forming means arranged in the second optical path branched by the optical path branching means. The reflected light at different magnification /
An image input device comprising: a second image forming means for forming an image of transmitted light; and a second optical system having a second sensor for reading an image formed by the second image forming means. 2. The first optical system and the second optical system,
The image input device according to claim 1, wherein the image input devices are arranged parallel to each other on one side in two directions orthogonal to the optical axis of the reflected light / transmitted light. 3. The optical path branching means is provided in a light path between the first reflecting mirror that reflects the reflected light / transmitted light toward the first image forming means, and the first reflecting mirror and the document holder. At the position where the light appears and disappears and appears in the optical path, the second reflected light / transmitted light is reflected toward the second image forming unit.
The image input device according to claim 2, wherein the image input device comprises a reflection mirror. 4. The image input device according to claim 2, wherein the optical path branching unit is composed of one reflecting mirror that moves in parallel along the optical axis of the reflected light / transmitted light. 5. The first optical system and the second optical system,
2. The image input device according to claim 1, wherein the image input devices are arranged in a straight line on both sides in two directions orthogonal to the optical axis of the reflected light / transmitted light. 6. The optical path branching means, a first reflecting surface for reflecting the reflected light / transmitted light toward the first image forming means,
A second reflecting surface for reflecting the reflected light / transmitted light toward the second image forming means, and the first and second reflecting surfaces appear alternatively in the optical path of the reflected light / transmitted light. The image input device according to claim 5, wherein the image input device comprises one reflecting mirror. 7. The first optical system and the second optical system,
The image input device according to claim 1, wherein the image input device is arranged at different angles with respect to the optical axes of the reflected light and the transmitted light. 8. The image input device according to claim 7, wherein the optical path branching unit is composed of one reflecting mirror capable of changing an angle of the reflected light / transmitted light with respect to an optical axis. 9. The first sensor of the first optical system and the second sensor of the second optical system are configured by one common sensor, and the first optical system is provided on the one common sensor. Of the first image forming means and the second optical system of the second optical system.
The image input device according to claim 7, wherein the reflected light / transmitted light is imaged by an image forming means. 10. The image forming state of an image in the first and second sensors is detected, and the original holder and the first and second sensors are detected.
The image input device according to claim 1, further comprising a focusing unit that performs focusing by changing a relative position with respect to the optical system.