CN104469070A - Contact type image sensor and image scanning device with same - Google Patents
Contact type image sensor and image scanning device with same Download PDFInfo
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- CN104469070A CN104469070A CN201410816688.0A CN201410816688A CN104469070A CN 104469070 A CN104469070 A CN 104469070A CN 201410816688 A CN201410816688 A CN 201410816688A CN 104469070 A CN104469070 A CN 104469070A
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- original copy
- image sensor
- type image
- light
- contact
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
- H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
- H04N1/0314—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors using photodetectors and illumination means mounted in the same plane on a common support or substrate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
- H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
- H04N1/0318—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light-source, a lens array and a photodetector array which are supported by a single-piece frame
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
The invention provides a contact type image sensor and an image scanning device with the contact type image sensor. The contact type image sensor is used for detecting image information of an original pattern and comprises a light emitting portion for emitting probe light to the original pattern and a light receiving portion for gathering the probe light emitted by the original pattern. The projection position of the probe light emitted by the light source emitting portion on the original pattern is located on the upstream position of the intersection point of an optical axis of the light receiving portion and the original pattern. By means of the technical scheme, the problem that in the prior art, the image scanning speed is lower can be solved.
Description
Technical field
The present invention relates to field of image detection, in particular to a kind of contact-type image sensor and the image-scanning device comprising it.
Background technology
In recent years, as paper money counter, cash inspecting machine, the automatic equipment of the process bank note such as automatic teller machine and bill or various marketable securities is widely popularized, and has the true and false image-scanning device differentiated to paper-bill classes such as bank note in such devices.
These image-scanning devices differentiate the true and false of paper-bill by detection of reflected image.The mode of the secondary light by scanning ultraviolet source, infrared light supply equal excitation is such as had to detect the true and false.So-called secondary light, refers to and penetrates because irradiating illumination the fluorescence, phosphorescence luminescence, infraluminescence etc. that ink and paper using be excited and produce.
But the paper-bill anti-counterfeiting technology of world community is various, the various ink on paper-bill have different reactions to different light.
Fig. 1 is the broken section structural representation of the contact-type image sensor of prior art, and as shown in Figure 1, contact-type image sensor also comprises framework 3 ' and light-passing board 7 '.Ultraviolet source sends ultraviolet lighting and is mapped on original copy 5 ', inspire fluorescence and phosphorescence, ultraviolet light through original copy reflection 5 ' is come together on sensor devices 4 ' with the fluorescence and phosphorescence excited by lens 2 ', through the opto-electronic conversion of sensor devices 4 ', light signal becomes the signal of telecommunication and exports, along with walking about of original copy 5 ', the information above it is just gone on record endlessly.As shown in Figure 1, the detection light that the light source emitting part 1 ' of contact-type image sensor sends is irradiated on original copy 5 ' with the incidence angle of 45 °, the focus of detection light on original copy 5 ' that the focus of the detection light sent to make light source emitting part 1 ' on original copy 5 ' and lens 2 receive overlaps, in Fig. 1, light source emitting part 1 ' is ultraviolet source.
Fig. 2 is the sampling schematic diagram of the contact-type image sensor of prior art, can see by Fig. 2, within this cycle of UV-light luminous, the output of contact-type image sensor comprises the ultraviolet light reflected by original copy, the fluorescence of ultraviolet excitation and phosphorescence, due to ultraviolet light, the existence of these light such as fluorescence, have impact on the scanning effect of phosphorescence, in order to improve false distinguishing precision, common way gathers fluorescence in ultraviolet source this cycle luminous or do not implement sampling action in this cycle, phosphorescence is gathered within the next line cycle, this just means that original copy 5 ' will stop one-period in lens 2 ' top, this has higher requirement to the conveyance motor as manuscript handling device, also reduce sweep speed simultaneously.
Summary of the invention
The image-scanning device that main purpose of the present invention is to provide a kind of contact-type image sensor and comprises it, to solve the lower problem of image scanning speed of the prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of contact-type image sensor, for detecting the image information on original copy, contact-type image sensor comprises for the light source emitting part to original copy emission detection light, for converging the light receiver portion of the detection light that original copy sends, the launching position of detection light on original copy that light source emitting part is launched is positioned at the upstream of the optical axis in light receiver portion and the intersection point of original copy.
Further, light source emitting part and light receiver portion are arranged on the same side of original copy.
Further, light source emitting part and the light receiver portion corresponding both sides be oppositely arranged being arranged on original copy respectively.
Further, contact-type image sensor also comprises: at least one framework; At least one light-passing board, light-passing board is connected with framework and forms container cavity.
Further, two light-passing boards that contact-type image sensor also comprises two frameworks and arranges with two framework one_to_one corresponding, light source emitting part and light receiver portion respectively correspondence are arranged in framework.
Further, light receiver portion comprises the sensor devices of the lens of the detection light for converging original copy reflection or transmission and the detection light of induction lens convergence.
Further, light source emitting part is multiple LED of matrix arrangement.
According to a further aspect in the invention, provide a kind of image-scanning device, comprise contact-type image sensor for detecting the image information on original copy and for carrying the manuscript handling device of original copy, contact-type image sensor is aforesaid contact-type image sensor.
Further, manuscript handling device comprises the first transfer roller portion and the second transfer roller portion, first transfer roller portion and the second transfer roller portion are corresponding is respectively arranged on the both sides be oppositely arranged of original copy to carry original copy, wherein, the direction of rotation in the first transfer roller portion and the second transfer roller portion.
Further, manuscript handling device comprises the first transfer roller portion and the second transfer roller portion, and the first transfer roller portion and the second transfer roller portion are all arranged on the same side of original copy, and the first transfer roller portion is identical with the rotation direction in the second transfer roller portion.
Apply technical scheme of the present invention, contact-type image sensor is for detecting the image information on original copy, contact-type image sensor comprises for the light source emitting part to original copy emission detection light, for converging the light receiver portion of the detection light that original copy sends, wherein, interval on the moving direction of original copy, direction of the detection light that the direction of the detection light that light source emitting part is launched and light receiver portion converge is arranged, by above-mentioned setting, along with the movement of original copy, the phosphorescence be only excited could arrive lens along with original copy and phosphorescence information is recorded continuously, improve sweep speed.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the broken section structural representation of the scanning means of prior art;
Fig. 2 shows the sequential chart of the imageing sensor of the scanning means of prior art;
Fig. 3 shows the broken section structural representation of the first embodiment of scanning means of the present invention;
Fig. 4 shows the broken section structural representation of the second embodiment of scanning means of the present invention;
Fig. 5 shows the broken section structural representation of the 3rd embodiment of scanning means of the present invention;
Fig. 6 shows the broken section structural representation of the 4th embodiment of scanning means of the present invention;
Fig. 7 shows the broken section structural representation of the 5th embodiment of scanning means of the present invention; And
Fig. 8 shows the broken section structural representation of the 6th embodiment of scanning means of the present invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
1, light source emitting part; 2, lens; 3, framework; 4, sensor devices; 5, original copy; 6, manuscript handling device; 61, the first transfer roller portion; 62, the second transfer roller portion; 7, light-passing board.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Present inventor is based on discoveries such as various tests, ultraviolet source irradiation can produce fluorescence and phosphorescence on some paper-bill, the luminescence of this phosphorescence can just disappear by last very long, have developed the contact-type image sensor (CIS) with discriminating phosphorescent characteristic according to this feature of phosphorescence.
First embodiment
As shown in Figure 3, the first embodiment of the present invention provides a kind of contact-type image sensor, for detecting the image information on original copy 5, contact-type image sensor comprises for the light source emitting part 1 to original copy 5 emission detection light, for converging the light receiver portion of the detection light that original copy 5 sends.The launching position of detection light on original copy 5 that light source emitting part 1 is launched is positioned at the upstream of the optical axis in light receiver portion and the intersection point of original copy 5.
By above-mentioned setting, interval on the moving direction of original copy 5, direction of the detection light that the direction of the detection light that light source emitting part 1 is launched and light receiver portion converge is arranged, along with the movement of original copy 5, the phosphorescence be only excited could arrive lens 2 along with original copy 5 and phosphorescence information is recorded continuously, improves sweep speed.
Further, when this contact-type image sensor is applied to scanning means, according to the feature of the phosphorescence fluorescent lifetime length that light source activation goes out, light source emitting part 1 adopts the mode of vertical irradiation original copy 5 and light source to excite phosphorescence in advance, phosphorescence is along with the movement of original copy 5, move after a segment distance, arrive before phosphorescence luminescence disappears above lens 2, phosphorescence is come together on sensor devices 4 by lens 2, become the signal of telecommunication through opto-electronic conversion more outwards to export, manuscript handling device 6 just need not stop one-period moving again, can successionally not stop transport dynamic, reduce the requirement of the motor of manuscript handling device, improve scan efficiency simultaneously.
As shown in Figure 3, in this embodiment of the present invention, light source emitting part 1 and light receiver portion are arranged on the same side of original copy 5.
Above-mentionedly arrange, the same side light source emitting part 1 and light receiver portion being arranged on original copy 5 can make the structure of whole contact-type image sensor compacter.
As shown in Figure 3, in embodiments of the invention, contact-type image sensor also comprises at least one framework 3 and at least one light-passing board 7.Light-passing board 7 is connected with framework 3 and forms container cavity.
Light receiver portion comprises the sensor devices 4 for converging the detection light that original copy 5 reflects or the lens 2 of detection light of transmission and induction lens 2 converge.
As shown in Figure 3, particularly, lens 2, sensor devices 4 and light source emitting part 1 are all arranged on the inside of above-mentioned container cavity.Utilize light-passing board 7 can be convenient to the transmission of light, and prevent dust from entering the inside of container cavity.
As shown in Figure 3, the first embodiment of the present invention additionally provides a kind of image-scanning device, comprise contact-type image sensor for detecting the image information on original copy 5 and for carrying the manuscript handling device 6 of original copy 5, contact-type image sensor is aforesaid contact-type image sensor.
Above-mentionedly to arrange, when after UV-irradiation original copy 5, the secondary light such as fluorescence, phosphorescence can be inspired, and fluorescence can disappear immediately after ultraviolet light is closed, along with the movement of original copy 5, the phosphorescence be only excited could arrive lens 2 along with original copy 5, when phosphorescence arrives after above lens 2, phosphorescence is through light-passing board 7, come together on sensor devices 4 by lens 2, then through the opto-electronic conversion of sensor devices 4, become the signal of telecommunication and outwards export, along with the continuous movement of original copy 5, phosphorescence information is recorded endlessly.
By above-mentioned setting, manuscript handling device 6 just need not stop one-period moving again, successionally can not stop transport dynamic, reduces the requirement of the motor of manuscript handling device, improve scan efficiency simultaneously.
In embodiments of the invention one, light source adopts the mode of vertical irradiation original copy 5 and light source to excite phosphorescence in advance, phosphorescence is along with original copy 5 is under the effect of manuscript handling device 6, move after a segment distance, arrive before phosphorescence luminescence disappears above lens 2, phosphorescence is come together on sensor devices 4 by lens 2, then becomes the signal of telecommunication through opto-electronic conversion and outwards export.
As shown in Figure 3, manuscript handling device 6 comprises the first transfer roller portion 61 and the second transfer roller portion 62, first transfer roller portion 61 and the second transfer roller portion 62 are all arranged on the same side of original copy 5, and the first transfer roller portion 61 is identical with the rotation direction in the second transfer roller portion 62.
Above-mentionedly to arrange, utilize the first transfer roller portion 61 and the second transfer roller portion 62 can transmit original copy 5, the same side above-mentioned first transfer roller portion 61 and the second transfer roller portion 62 being all arranged on original copy 5 can make the more compact structure of whole contact-type image sensor.
As shown in Figure 3, the operation principle of the image-scanning device of the embodiment of the present invention is as described below:
As the light transmission light-passing board 7 that the light guide bar type light source of light source emitting part 1 sends, be irradiated on original copy 5, inspire the phosphorescence on original copy 5, original copy 5 continues forward (right side namely shown in Fig. 3) motion under the effect of manuscript handling device 6, after phosphorescence is excited, just can disappear every a period of time, when phosphorescence arrives after above lens 2, phosphorescence is through light-passing board 7, come together on sensor devices 4 by lens 2, again through the opto-electronic conversion of sensor devices 4, become the signal of telecommunication outwards to export, along with the continuous movement of original copy 5, phosphorescence information is recorded endlessly.
Its feature is, when after UV-irradiation original copy 5, the secondary light such as fluorescence, phosphorescence can be inspired, and fluorescence can disappear immediately after ultraviolet light is closed, along with the movement of original copy 5, the phosphorescence be only excited could arrive lens 2 along with original copy, and illuminating source is L from the distance of lens, the movement speed v of original copy 5, L/v is less than the fluorescent lifetime of phosphorescence.Adopt in this way, manuscript handling device just need not stop one-period moving again, successionally can not stop transport dynamic, reduces the requirement of manuscript handling device, improve scan efficiency simultaneously.
Second embodiment
The main distinction point of the second embodiment and the first embodiment is:
As shown in Figure 4, preferably, multiple LED of arranging for matrix of light source emitting part 1.
Adopt light source in this way, effectively raise the luminous intensity of ultraviolet light, the brightness of the secondary light gone out by ultraviolet excitation also increases, and contributes to the quality of scanning improving phosphorescence.
Other structures of second embodiment are identical with the structure of the first embodiment, no longer describe herein.
3rd embodiment
The difference of third embodiment of the invention and the first embodiment is:
As shown in Figure 5, in embodiments of the invention three, two light-passing boards 7 that contact-type image sensor also comprises two frameworks 3 and arranges with two framework 3 one_to_one corresponding, light source emitting part 1 and light receiver portion respectively correspondence are arranged in framework 3.
By above-mentioned setting, light source emitting part 1 and light receiver portion are separately positioned in different frameworks 3, and this mode is conducive to user and installs more flexibly, is conducive to the structural design of contact-type image sensor.
4th embodiment
The distinctive points of fourth embodiment of the invention and the first embodiment is:
On the one hand, contact-type image sensor two light-passing boards 7 also comprising two frameworks 3 and arrange with two framework 3 one_to_one corresponding as shown in Figure 6, light source emitting part 1 and light receiver portion respectively correspondence are arranged in framework 3.
By above-mentioned setting, light source emitting part 1 and light receiver portion are separately positioned in different frameworks 3, and this mode is conducive to user and installs more flexibly, is conducive to the structural design of contact-type image sensor.
On the other hand, as shown in Figure 6, light source emitting part 1 is preferably the multiple LED for matrix arrangement.
Adopt light source in this way, effectively raise the luminous intensity of ultraviolet light, the brightness of the secondary light gone out by ultraviolet excitation also increases, and contributes to the quality of scanning improving phosphorescence.
5th embodiment
The difference of fifth embodiment of the invention and the first embodiment is:
As shown in Figure 7, in the 5th embodiment, light source emitting part 1 and light receiver portion be the corresponding both sides be oppositely arranged being arranged on original copy 5 respectively.
As shown in Figure 7, in the fifth embodiment of the present invention, first transfer roller portion 61 and the second transfer roller portion 62 are corresponding is respectively arranged on the both sides be oppositely arranged of original copy 5 to carry original copy 5, wherein, and the direction of rotation in the first transfer roller portion 61 and the second transfer roller portion 62.
Above-mentionedly to arrange, due to light source emitting part 1 and the light receiver portion corresponding both sides be oppositely arranged being arranged on original copy 5 respectively, the detection light launched for the ease of light source emitting part 1 is as much as possible on full illumination to original copy 5 and be convenient to lens 2 and converge as far as possible and detect light, first transfer roller portion 61 is arranged on the below (namely relative with the side of the original copy 5 at light source emitting part 1 place opposite side) of original copy 5, the second transfer roller portion 62 and light source emitting part 1 is arranged on the same side of original copy 5.
Particularly, original copy 5 has the first side and the second side that are oppositely arranged, and wherein, as shown in Figure 7, light source emitting part 1 and the second transfer roller portion 62 are all positioned at the first side of original copy 5, and light receiver portion and the first transfer roller portion 61 are all positioned at the second side of original copy 5.
6th embodiment
The difference of sixth embodiment of the invention and the 5th embodiment is:
As shown in Figure 8, in the 6th embodiment, light source emitting part 1 is preferably multiple LED of matrix arrangement.
Adopt light source in this way, effectively raise the luminous intensity of ultraviolet light, the brightness of the secondary light gone out by ultraviolet excitation also increases, and contributes to the quality of scanning improving phosphorescence.
Other structures of 6th embodiment are identical with the structure of the 5th embodiment, no longer describe herein.
From above description, can find out, the above embodiments of the present invention achieve following technique effect: contact-type image sensor is for detecting the image information on original copy, contact-type image sensor comprises for the light source emitting part to original copy emission detection light, for converging the light receiver portion of the detection light that original copy sends, the launching position of detection light on original copy that light source emitting part is launched is positioned at the upstream of the optical axis in light receiver portion and the intersection point of original copy, by above-mentioned setting, interval on the moving direction of original copy, direction of the detection light that the direction of the detection light that light source emitting part is launched and light receiver portion converge is arranged, along with the movement of original copy, the phosphorescence be only excited could arrive lens along with original copy and phosphorescence information is recorded continuously, improve sweep speed.
Further, when this contact-type image sensor is applied to scanning means, according to the feature of the phosphorescence fluorescent lifetime length that light source activation goes out, light source emitting part adopts the mode of vertical irradiation original copy and light source to excite phosphorescence in advance, phosphorescence is along with the movement of original copy, move after a segment distance, arrive before phosphorescence luminescence disappears above lens, phosphorescence is come together on sensor devices by lens, become the signal of telecommunication through opto-electronic conversion more outwards to export, manuscript handling device just need not stop one-period moving again, can successionally not stop transport dynamic, reduce the requirement of the motor of manuscript handling device, improve scan efficiency simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a contact-type image sensor, for detecting the image information on original copy (5), described contact-type image sensor comprises for the light source emitting part (1) to described original copy (5) emission detection light, for converging the light receiver portion of the described detection light that described original copy (5) sends, it is characterized in that, the launching position of described detection light on described original copy (5) that described light source emitting part (1) is launched is positioned at the upstream of the optical axis in described light receiver portion and the intersection point of described original copy (5).
2. contact-type image sensor according to claim 1, is characterized in that, described light source emitting part (1) and described light receiver portion are arranged on the same side of described original copy (5).
3. contact-type image sensor according to claim 1, is characterized in that, described light source emitting part (1) and described light receiver portion respectively correspondence are arranged on the both sides be oppositely arranged of described original copy (5).
4. contact-type image sensor according to claim 1, is characterized in that, described contact-type image sensor also comprises:
At least one framework (3);
At least one light-passing board (7), described light-passing board (7) is connected with described framework (3) and forms container cavity.
5. contact-type image sensor according to claim 4, it is characterized in that, two described light-passing boards (7) that described contact-type image sensor also comprises two described frameworks (3) and arranges with two described framework (3) one_to_one corresponding, described light source emitting part (1) and described light receiver portion respectively correspondence are arranged in described framework (3).
6. contact-type image sensor according to any one of claim 1 to 5, it is characterized in that, described light receiver portion comprises the lens (2) of the described detection light for converging described original copy (5) reflection or transmission and responds to the sensor devices (4) of the described detection light that described lens (2) converge.
7. contact-type image sensor according to any one of claim 1 to 5, is characterized in that, multiple LED that described light source emitting part (1) arranges for matrix.
8. an image-scanning device, comprise contact-type image sensor for detecting the image information on described original copy (5) and for carrying the manuscript handling device (6) of described original copy (5), it is characterized in that, described contact-type image sensor is contact-type image sensor according to any one of claim 1 to 7.
9. image-scanning device shown according to Claim 8, it is characterized in that, described manuscript handling device (6) comprises the first transfer roller portion (61) and the second transfer roller portion (62), described first transfer roller portion (61) and described second transfer roller portion (62) respectively correspondence are arranged on the both sides be oppositely arranged of described original copy (5) to carry described original copy (5), wherein, the direction of rotation in described first transfer roller portion (61) and described second transfer roller portion (62).
10. image-scanning device shown according to Claim 8, it is characterized in that, described manuscript handling device (6) comprises the first transfer roller portion (61) and the second transfer roller portion (62), described first transfer roller portion (61) and described second transfer roller portion (62) are all arranged on the same side of described original copy (5), and described first transfer roller portion (61) is identical with the rotation direction in described second transfer roller portion (62).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410816688.0A CN104469070A (en) | 2014-12-24 | 2014-12-24 | Contact type image sensor and image scanning device with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410816688.0A CN104469070A (en) | 2014-12-24 | 2014-12-24 | Contact type image sensor and image scanning device with same |
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| CN104469070A true CN104469070A (en) | 2015-03-25 |
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| CN201410816688.0A Pending CN104469070A (en) | 2014-12-24 | 2014-12-24 | Contact type image sensor and image scanning device with same |
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| CN108022361A (en) * | 2016-10-31 | 2018-05-11 | 威海新北洋荣鑫科技股份有限公司 | Image data acquisition method and device |
| WO2022267862A1 (en) * | 2021-06-25 | 2022-12-29 | 威海华菱光电股份有限公司 | Image sensing apparatus, and image scanning device and scanning method thereof |
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| WO2010040557A1 (en) * | 2008-10-10 | 2010-04-15 | Giesecke & Devrient Gmbh | Method for detecting bank notes and bank note processing device |
| CN102754129A (en) * | 2009-11-23 | 2012-10-24 | 霍尼韦尔国际公司 | Authentication apparatus for moving value documents |
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| WO2022267862A1 (en) * | 2021-06-25 | 2022-12-29 | 威海华菱光电股份有限公司 | Image sensing apparatus, and image scanning device and scanning method thereof |
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Application publication date: 20150325 |
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