JPH07123223A - Original reader and information processor using same - Google Patents

Abstract

PURPOSE:To simplify the assembly process by adhering or vapor-depositting a filter having a desired spectral transmission characteristic to a light transmissive member in the original reader having a casing supporting integrally a light transmission member and an optical system. CONSTITUTION:The same components are employed for the reader except an infrared-ray cut filter glass 222 and a casing 200'. Then a light in an undesired wavelength region of a light source 210 is eliminated by the filter glass 222 and only the light in the desired wavelength region is made incident into a pixel aperture (not shown) of a sensor 1 via an optical system (short focus image forming element array) 209. In place of a conventional transparent glass plate on which an original is placed, the infrared-ray cut filter glass 222 is used, then, it is eliminated to provide a specific process without increasing the number of components. Further, a filter having a objective and desired spectral transmission characteristic to eliminate the light of other wavelength is fitted to the reader, then the similar effect is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus used for reading a document such as a facsimile or a copying machine, and an information processing apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, as a document reading apparatus, a contact type multi-chip image sensor using, for example, a short-focus image forming element array is known.

5 to 7 show an example of such a document reading device. FIG. 5 is a schematic sectional view of a conventional document reading device, FIG. 6 is an external perspective view of the document reading device, and FIG. 7 is a sensor substrate. It is a top view which shows the structure of.

As shown in FIG. 5, a transparent glass plate 201 which is in contact with the original surface is attached to the upper surface of a casing 200, and the emitted light 212 of a light source 210 provided in the housing 200 is the upper surface of the transparent glass plate 201. The optical system 209 that reflects the original surface in contact with the transparent glass plate 201 and transmits the reflected light 213 of the transparent glass plate 201, the infrared cut filter 211, and a plurality of line sensors 1 provided on the substrate 19 corresponding to the optical system 209. Within 200.

The optical system 209 has, for example,
The above-mentioned short-focus imaging element array represented by the product name "SELHOC LENS ARRAY" (manufactured by Nippon Sheet Glass Co., Ltd.) is used.

The line sensor 1 is covered with a protective film 206 on the substrate 19, and the substrate 19 is a housing 200.
Is supported by the bottom plate 205 engaged with the elastic body 221.

Further, as shown in FIGS. 6 and 7, the substrate 19 is a flexible substrate 20 via flexible wiring 208.
3 is connected to the light source 210 on the flexible substrate 203.
A variable resistor 204 for dimming, a connector 202 for inputting / outputting a power supply, a control signal, etc. are provided, and are attached to a bottom plate 205 by screws 207.

When the light emitted from the light source 210 contains, for example, infrared rays, the sensor 1 usually has sensitivity in the infrared region. Therefore, an infrared cut filter 211 is provided below the optical system 209 of the housing 200. The infrared light was removed.

[0009]

However, in the above-mentioned conventional example, since the infrared cut filter is incorporated, it is necessary to make a structure for holding it in the housing as shown in FIG. 5, and the housing has a filter shape. There is a problem in that cost increases due to an increase in the number of parts because it is different from the unnecessary one.

Further, there is a problem that the process is complicated and the cost is increased because a process for mounting the filter and a process for manufacturing the housing for mounting the filter are required.

(Object of the Invention) An object of the present invention is to realize an original reading apparatus and an information processing apparatus which suppress an increase in the steps of assembling an infrared cut filter and do not change the shape of the housing, thereby reducing the cost. To do.

[0012]

Means for Solving the Problems The present invention is, as a means for solving the above-mentioned problems, a translucent member which is in contact with a document surface and transmits reflected light from the document surface, and the reflected light on a sensor. In an original reading device configured to have an optical system for forming an image on a sheet, and a casing that integrally supports the transparent member and the optical system, as the transparent member in contact with the original surface,
Provided is a document reading device using a filter having a desired spectral transmission characteristic.

Further, a translucent member which is in contact with the document surface and transmits the reflected light from the document surface, an optical system for forming an image of the reflected light on a sensor, and the translucent member and the optical system are integrated. In a document reading device configured to have a housing for supporting the document reading device, a document reading device formed by attaching or vapor-depositing a filter having a desired spectral transmission characteristic to the translucent member. Is the means.

The filter may be attached or vapor-deposited only on the surface of the light-transmitting portion of the light-transmissive member, or may be attached or vapor-deposited on the short-focus image forming element array of the optical system. Good.

[0015]

According to the present invention, a filter glass is used instead of the transparent glass plate in contact with the original surface, or a filter is adhered or vapor-deposited on the transparent glass or the optical system without changing the housing shape. The number of parts is reduced and the assembly is easier.

[0016]

(Embodiment 1) FIG. 1 is a schematic sectional view showing the internal structure of a document reading apparatus according to a first embodiment of the present invention.

In the figure, 222 is an infrared cut filter glass, 200 'is a housing, and other parts are the same as those of the conventional example.

The light in the unnecessary wavelength region of the light source 210 is removed by the filter glass 222, and only the light in the desired wavelength region is passed through the optical system (short focus imaging element array) 209.
The light enters the pixel opening (not shown) of the sensor 1.

In this embodiment, an infrared cut filter glass 222 is used instead of the conventional transparent glass plate with which the original is in contact.
Since, the number of parts is not increased and no special process is required.

Further, not limited to the infrared cut filter,
The same effect can be obtained by attaching a filter having a desired spectral transmission characteristic for the purpose of removing other wavelengths as in this embodiment.

(Embodiment 2) FIG. 2 is a schematic sectional view showing the internal structure of a document reading apparatus according to Embodiment 2 of the present invention.

In the figure, 223 is a transparent glass plate, 2
Reference numeral 24 is an infrared cut filter, and the other parts are the same as in the first embodiment.

In the present embodiment, in consideration of the strength of the surface in contact with the original, the transparent glass plate 223 is used in the upper part, and the infrared light is removed by using the filter 224 in the lower part on the side not in contact with the original. .

As described above, by using the filter glass attached to the transparent glass plate 223, the glass strength on the original surface, the removal of infrared light, and the ease of assembly can be achieved at the same time. Moreover, the shape of the housing is not changed.

Further, instead of adhering the filter glass, titanium, magnesium fluoride or the like may be vapor-deposited to form a filter having desired characteristics at a desired position. (Third Embodiment) FIG. 3 is a schematic sectional view showing the internal structure of a document reading apparatus according to the third embodiment of the present invention.

In the figure, reference numeral 225 denotes a filter, which is a transparent glass corresponding to an area through which incident light at the original reading position, reflected light from the reading position passes, or a readable area of the optical system 209. The filter glass 225 is attached to the transparent glass plate 201 in a limited area of the plate 201.

According to this embodiment, the area of the filter glass, which is higher in cost than the ordinary transparent glass, is minimized because the pasting is limited to the portion where the incident light and the reflected light on the original surface to be read pass. be able to.

Also in this embodiment, a filter having desired characteristics can be formed at the position of this embodiment by depositing titanium, magnesium fluoride or the like instead of attaching the filter glass. (Embodiment 4) FIG. 4 is a schematic sectional view showing the internal structure of a document reading apparatus according to Embodiment 4 of the present invention.

In the figure, 226 is a filter.

In FIG. 4 (A), the filter 226 is attached to the upper part of the optical system 209 (on the side of the original), and in FIG. 4 (B) to the lower part of the optical system 209 (on the sensor side). It is integrated.

In such a structure, the filter glass 2
26 requires only a minimum area, and the optical system 2
The position of 09 may be the same regardless of the presence or absence of the filter glass 226. Therefore, it is easy to assemble and the cost of parts is small.

Also in this embodiment, a filter having desired characteristics can be formed at the position of this embodiment by depositing titanium, magnesium fluoride or the like instead of attaching the filter glass. (Embodiment 5) FIG. 9 is a schematic sectional view of a facsimile apparatus as an information processing apparatus using the document reading apparatus of the present invention.

In the figure, the contact type multi-chip image sensor unit 110 is arranged at a document reading position of a facsimile, for example, through a fixing metal fitting 109. Here, the document insertion opening 103 is provided at the front edge of the facsimile main body 100.
Is provided, and a document is inserted from above the guide stage 104 of the document insertion opening 103. Also,
An operation panel 101 is arranged on the upper surface of the front of the facsimile main body 100, and a document take-out port 102 is provided behind it.

Document 1 inserted from the document insertion port 103
The sheet 18 reaches the feeding roller 108 via the separating piece 117, passes from there between the platen roller 115 and the image sensor 110, and is discharged to the document take-out port 102. A roll-shaped recording paper 114 is stored in the rear part of the facsimile main body 100, and an end of the recording paper 114 is taken out through a platen roller 115. The recording head is located at the position of the platen roller 115. Information is recorded by 111.

In the figure, 112 is a system control board of the facsimile and 113 is a power supply unit.

[0036]

As described above, according to the present invention,
By using a filter glass instead of the transparent glass that comes into contact with the original of the original reading device, it is not necessary to separately prepare a housing for attaching the filter as in the conventional case, and the step of attaching the filter can be omitted, so that the parts can be eliminated. Costs can be reduced by reducing the number of points and steps.

Further, the process of assembling can be simplified by attaching a filter to transparent glass or forming a filter by vapor deposition, or attaching a filter glass to an optical system or forming a filter by vapor deposition. You can

Furthermore, by incorporating the document reading apparatus of the present invention, it is possible to obtain the effect of realizing a cost-reduced information processing apparatus.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an internal structure of a document reading apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing the internal structure of a document reading device according to a second embodiment of the invention.

FIG. 3 is a schematic cross-sectional view showing the internal structure of a document reading device according to a third embodiment of the invention.

FIG. 4 is a schematic cross-sectional view showing the internal structure of a document reading device according to a fourth embodiment of the invention.

FIG. 5 is a schematic cross-sectional view showing the internal structure of a conventional document reading apparatus.

FIG. 6 is an external perspective view of a document reading apparatus of a conventional example.

FIG. 7 is a top view of a conventional sensor substrate.

FIG. 8 is a schematic sectional view showing the structure of a facsimile apparatus as an information processing apparatus using the document reading apparatus of the present invention.

[Explanation of symbols]

 1 line sensor 19 substrate 200, 200 'housing 201,223 transparent glass plate 202 input / output connector 203 flexible substrate 204 variable resistor for dimming 204 205 bottom plate 206 protective film 207 screw 208 flexible wiring 209 optical system (short focus) Imaging element array) 210 Light sources 211, 222 Infrared cut filter glass 212 Emitted light 213 Reflected light 221 Elastic body 224, 225, 226 Infrared cut filter

Claims (8)

[Claims] 1. A translucent member that is in contact with a document surface and transmits the reflected light from the document surface, an optical system that forms an image of the reflected light on a sensor, and the translucent member and the optical system are integrated. A document reading device configured to include a housing supporting the document reading device, wherein a filter having a desired spectral transmission characteristic is used as a translucent member in contact with the document surface. 2. A translucent member which is in contact with a document surface and transmits reflected light from the document surface, an optical system which forms an image of the reflected light on a sensor, and the translucent member and the optical system are integrated. An original reading device configured to have a housing that supports the above, wherein a filter having a desired spectral transmission characteristic is attached to the translucent member. 3. The document reading apparatus according to claim 2, wherein the filter is attached only to the surface of the light transmitting portion of the light transmitting member. 4. The document reading apparatus according to claim 2, wherein the filter is attached to the short-focus image forming element array of the optical system. 5. A translucent member which is in contact with a document surface and transmits the reflected light from the document surface, an optical system which forms an image of the reflected light on a sensor, and the translucent member and the optical system are integrated. A document reading device configured to have a housing for supporting the document reading device, wherein a filter having a desired spectral characteristic is vapor-deposited on the translucent member. 6. The document reading apparatus according to claim 5, wherein the filter is vapor-deposited only on the surface of the light transmitting portion of the light transmitting member. 7. The filter is vapor-deposited on the short-focus image forming element array of the optical system.
The document reading device according to item 1. 8. An information processing apparatus comprising the document reading device according to claim 1, 2, or 5.