JPH06253097A - Scanner - Google Patents

Abstract

PURPOSE:To eliminate the deviation of read positions on a front and a back and to miniaturize a scanner part by symmetrically positioning light emitting bodies and CCD image sensors on the both surfaces of a paper in the case of simultaneously reading the both surfaces of the paper. CONSTITUTION:This scanner is constituted of the light emitting body 12 for a front surface and the CCD image sensor 13 for the front surface for reading the front surface of an original 11, the light emitting body 15 for a back surface and the CCD image sensor 16 for the back surface for reading the back surface of the original and a polarizing plate 14 for the front surface and the polarizing plate 17 for the back surface for passing light through provided with the planes of polarization in different directions respectively for the front surface and the back surface. The light emitting body for the front surface, the CCD image sensor for the front surface, the light emitting body for the back surface and the CCD image sensor for the back surface are arranged so as to face each other. Since the light emitting bodies and the CCD image sensors are arranged symmetrically at the front and the back, the scanner part can be miniaturized and the deviation of the read positions at the front and the back can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanner device for simultaneously reading both sides of a large number of double-side printed originals and pages of a book automatically.

[0002]

2. Description of the Related Art A CCD image sensor or the like is used as an input device in a device for storing information on paper in a magnetic medium or an optical medium. Conventionally, when a document printed on both sides is filed, one side is read manually or by using a reversing device, so it takes time and it is very difficult to read a large amount of information.

As a means for solving this problem, there has been proposed a scanner device in which a reading device is provided on each of the front surface and the back surface so that both sides of a document can be read simultaneously. FIG. 5 shows the configuration of the scanner device. Reference numeral 51 is a document having information to be read on both sides, 52 is a surface light emitter for reading the front surface of the document 51, and 53 is a surface light emitter 52. A front surface CCD image sensor that reads information on the front surface of the original 51 by light, 54 is a light emitter for the back surface for reading the back surface of the original 51, and 55 is light emitted by the light emitter 54 for the back surface of the original document 51.
CCD image sensor for back side, which reads information on the back side of
Reference numeral 56 is a black-colored front surface contact member, and 57 is a black-colored rear surface contact member.

The surface light emitter 52 and the surface CCD image sensor 53 are adjacent to each other, and the surface light emitter 52 and the surface C
The CD image sensor 53 faces the front cover member 56, the rear surface light emitter 54 and the rear surface CCD image sensor 55 are adjacent to each other, and the rear surface light emitter 54 and the rear surface CCD image sensor 55 include the rear surface contact member 57. It is placed facing each other. The position where the front surface CCD image sensor 53 reads the information on the front surface of the document 51 and the position where the back surface CCD image sensor 55 reads the information on the back surface of the document 51 are different as shown by 58 in the figure. With the above configuration, the CC for the surface
D image sensor 53 and backside CCD image sensor 55
Shows the influence of the leaked light transmitted through the original from the light emitter 54 for the back surface and the light emitter 52 for the front surface, respectively.
Both sides can be read at a time without receiving by 57.

[0005]

However, in the scanner device for reading both sides at once as shown in FIG. 5, it is necessary to arrange the reading positions 58 so as to be different from each other, so that the scanner device should be miniaturized. I couldn't. Further, if the medium to be read is not on both sides of a sheet of paper but in the shape of a book or the like, there is a problem in that the front and back are misaligned, and the front and back can be read but the back and back cannot be read.

The present invention is intended to solve the above-mentioned problems, and by eliminating the read position of the front and back sides by making the read position of the front CCD image sensor and the read position of the back CCD image sensor the same. ,
The purpose is to reduce the size of the scanner device main body for reading both sides.

[0007]

According to the present invention, in order to reduce the size of a scanner device, the same position on both sides of a document is read at the same time without shifting the positions of the front surface light emitter and the back surface light emitter. Configuration and 1. A polarizing plate that polarizes the light emitted from the front surface light emitter and the front surface CCD image sensor and the document, and a back surface between the rear surface light emitter and the back surface CCD image sensor and the original document. A polarizing plate that polarizes the light emitted by the light emitting body is disposed so as to intersect with the polarization plane of the light emitted by the surface light emitting body in a direction perpendicular to each other.

2. Light emitters that emit light of different wavelengths are arranged on the front and back sides, so that the CCD image sensor for the front side of the document only shows the wavelength of the light emitted by the light source for the front side and the CCD image sensor for the back side of the document is for the back side. Read only the wavelength of the light emitted by the light emitter.

3. Surface illuminant and surface CCD
Image sensor, light emitter for back side and CC for back side
D image sensor operating time (ON), non-operating time (OF
The timing of F) is shifted so that the front side and the back side are alternately read line by line.

[0010]

According to the present invention, since the light emitter and the CCD image sensor are arranged symmetrically on the front and back sides, the scanner portion can be downsized and the deviation of the front and back reading positions can be eliminated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a scanner device according to a first embodiment of the present invention. As shown in FIG. 1, 11 is a document on which information to be read is printed on both sides, and 12 is a document. Surface illuminator to read the information of 11 surfaces,
13 is a surface CCD for reading the light emitted from the surface light emitter 12.
An image sensor, 14 is a front surface polarizing plate for polarizing the light emitted from the front surface light-emitting body 12 and causing the front surface CCD image sensor 13 to read the light having the polarization plane, and 15 is for reading the information on the back surface of the original 11. The light source for the back surface to allow the light to be emitted, 16 is a CCD image sensor for the back surface that reads the light emitted by the light emitter for the back surface 15, and 17 is the light for the light emitted by the light emitter for the back surface 15 and is C for the back surface.
This is a back-side polarizing plate for causing the CD image sensor 16 to read light having the polarization plane. The front-side polarizing plate 14 and the back-side polarizing plate 17 are arranged so that their polarization planes intersect each other perpendicularly. Therefore, both CCD image sensors 13 and 16 are affected by the light emitted from the other and transmitted through the document. Never receive.

Front surface light emitter 12 and front surface CCD image sensor 13, back surface light emitter 15 and rear surface CC
The D image sensors 16 are adjacent to each other, and the front surface light-emitting body 12 and the front surface CCD image sensor 13 and the front surface polarizing plate 14 are arranged between the original 11, and the back surface light emitting body 15 and the back surface CCD image sensor 16 are arranged. Polarizing plate for the back side between the
17 are arranged, and they are arranged symmetrically with respect to the front and back of the original 11.

Next, the operation will be described. When the original 11 is inserted into the scanner section from the direction of arrow a, the front surface light-emitting body 12 and the back surface light-emitting body 15 emit light at the same time, and the front surface polarization plate 14 and the back surface polarization plate. The respective polarized lights that have passed through 17 are reflected and transmitted on the front surface and the back surface of the original 11, respectively, and are reflected by the front surface polarization plate 14 and the back surface polarization plate 17 and are reflected by the front surface light emitter 12 and the back surface light emitter, respectively.
The reflected light of 15 passes and is read by the front CCD image sensor 13 and the back CCD image sensor 16, respectively. The polarized light emitted from the rear surface light-emitting body 15 or the front surface light-emitting body 12 and transmitted through the original 11 cannot pass through because it has a different polarization plane from the front surface polarization plate 14 or the back surface polarization plate 17, and thus the CCD.
It does not affect the image sensor.

FIG. 2 is a block diagram of a scanner device according to the second embodiment of the present invention, which is a case where light emitters having different wavelengths are used.

As shown in FIG. 2, reference numeral 21 is a manuscript on which information to be read is printed on both sides, 22 is a front surface light emitter for reading the front surface of the manuscript 21, and 23 is a front surface light emitter 22. The CCD image sensor for the front surface that reads the light of the same wavelength as the light emitted by, 24 is a light emitter for the back surface for reading the back surface of the document 21, and emits light of a wavelength different from that of the light emitter 22 for the front surface. Reference numeral 25 is a backside CCD image sensor for reading the light of the same wavelength as the wavelength of the light emitted from the backside light emitter 24.

Front surface light emitter 22 and front surface CCD image sensor 23, rear surface light emitter 24 and rear surface CCD image sensor
25 are adjacent to each other, and the illuminants on the front and back sides and C
The CD image sensors are arranged facing each other.

The operation will now be described. When the document 21 is inserted into the scanner section from the direction of arrow a, the front surface light-emitting body 22 and the back surface light-emitting body 24 emit light at the same time, and the front surface CCD image sensor 23 and the back surface CCD respectively. The image sensor 25 reads the front surface and the back surface of the document 21. Of the light emitted from the front surface light-emitting body 22 or the back surface light-emitting body 24, the light transmitted through the original 21 is the back surface CCD image sensor 25 or the front surface CC, respectively.
Although it reaches the D image sensor 23, the wavelength of the light read by the back-side CCD image sensor 25 or the front-side CCD image sensor 23 is different, so the light of the front-side light emitter 22 reaches the back-side CCD image sensor 25, or The light from the light emitter 24 for the back surface does not affect the CCD image sensor 23 for the front surface, and both sides can be read simultaneously.

FIG. 3 is a block diagram of a scanner device according to a third embodiment of the present invention, in which the front and back light emitters and the CCD image sensor are alternately operated repeatedly (ON-OFF). Is.

As shown in FIG. 3, reference numeral 31 is a manuscript on which information to be read is printed on both sides, 32 is a surface light emitter for reading the information on the front surface of the manuscript 31, and 33 is a surface light emission. A front surface CCD image sensor for reading the light emitted from the body 32, a rear surface light emitter for reading information on the rear surface of the original 31, and a back surface CCD image sensor for reading the light light from the rear surface light emitter 34. , 36, the front surface light emitter 32 and the front surface CCD image sensor 33, and the back surface light emitter 34 and the rear surface CCD image sensor 35 are alternately turned on alternately.
This is an operation control device that is turned off.

The front surface light emitter 32 and the front surface CCD image sensor 33, and the back surface light emitter 34 and the back surface CCD image sensor 35 are arranged adjacent to each other.
The D image sensors are arranged to face each other.

Next, the operation will be described with reference to the operation timing chart of FIG. 4. (1) shows the surface light emitter 32 and the surface CC.
D image sensors 33 and (2) show the respective operating states of the rear surface light emitter 34 and the rear surface CCD image sensor 35. When the scanner device starts to operate (43 in FIG. 4) and the original 31 is inserted into the scanner portion from the direction of arrow a, either of the light emitters and the CCD image sensor first operate, so that the front surface light emitter 32 is used as an example. Then, the surface CCD image sensor 33 operates first (ON: operating state 41), and this state is shown in FIG. 4 (1). The operation control device 36 first operates the front surface light emitter 32 and the front surface CCD image sensor 33 to operate the front surface 1 of the original 31.
Read line information. In the meantime, as shown in FIG. 4 (2), the rear surface light emitter 34 and the rear surface CCD image sensor 35 are not operated (OFF: inactive state 42). C for surface
When the CD image sensor 33 finishes reading the information of one line of the original 31, the operation control device 36 causes the front surface light emitter 32 and the front surface C
The operation of the CD image sensor 33 is stopped (OFF), the light emitter 34 for the back surface and the CCD image sensor 35 for the back surface are operated (ON), and the information directly behind the one line read by the front CCD image sensor 33 is displayed. Read. When the back side CCD image sensor 35 finishes reading the information of one line on the back side of the original 31, the operation control device 36 causes the back side light emitter 34 and the back side C
The operation of the CD image sensor 35 is stopped, the original 31 is conveyed by one line, and the front surface light emitter 32 and the front surface CCD image sensor 33 are operated. The above operation is repeated until the manuscript 31 is completely read.

[0022]

As described above, the scanner device of the present invention has the structure in which the light emitter and the CCD image sensor are arranged symmetrically on the front and back sides. The size is smaller than before, and it is possible to eliminate the deviation of the reading positions on the front and back.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a scanner device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a scanner device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a scanner device according to a third embodiment of the present invention.

FIG. 4 is a diagram showing the operation timing of FIG. 3;

FIG. 5 is a configuration diagram of a conventional scanner device.

[Explanation of symbols]

11, 21, 31, 51 ... Originals that are scanned on both sides, 12, 22,
32,52 ... Surface light emitter, 13, 23, 33, 53 ... Surface CCD
Image sensor, 14 ... Surface polarizing plate, 15, 24, 34,
54 ... Light emitter for back surface, 16, 25, 35, 55 ... CCD image sensor for back surface, 17 ... Polarizing plate for back surface, 36 ... Operation control device for controlling operation timing of front surface and back surface, 41 ... Operating state, 42 ... Inactive state, 43 ... Point at which scanner device starts to operate, 56 ... Surface contact member,
57 ... Backing member, 58 ... Reading position that indicates the difference between the point where the front CCD image sensor reads and the point where the back CCD image sensor reads.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Shiramizu 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A front surface light emitter and a front surface CCD image sensor for reading the front surface and the back surface of a document simultaneously, and a back surface light emitter and a back surface CCD image sensor for reading the back surface of the document. An image sensor, a front-side polarizing plate that allows light having polarization planes in different directions on the front and back sides to pass therethrough, and a back-side polarizing plate. The front and back light emitters and the CCD image sensor face each other. A scanner device, which is arranged so as to be aligned with each other, and is arranged such that respective polarization planes of the front and back polarizing plates intersect each other vertically, and the same position on the front surface and the back surface of the original is read at the same time. 2. A light-emitting body in which the wavelengths of light emitted from the front and back sides are different so that the front and back sides of a document can be read simultaneously.
CCD image sensors for reading only light of the same wavelength as the light emitted from the light emitters on the same side with respect to the original are provided on the front surface and the back surface, respectively.
A scanner device in which CD image sensors are arranged to face each other to read the same position on the front and back sides of a document at the same time. 3. A front side and a back side each have a light emitter and a CCD image sensor for reading the front side and the back side of a document at the same time. A scanner device characterized in that a certain illuminant and a CCD image sensor and an illuminant and a CCD image sensor on the back side of an original read alternately both sides of the original while alternately operating and non-operating repeatedly.