CN101986352B - Contact image sensor - Google Patents
Contact image sensor Download PDFInfo
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- CN101986352B CN101986352B CN201010567779.7A CN201010567779A CN101986352B CN 101986352 B CN101986352 B CN 101986352B CN 201010567779 A CN201010567779 A CN 201010567779A CN 101986352 B CN101986352 B CN 101986352B
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Abstract
The invention relates to a contact image sensor (CIS), belonging to the technical field of image readout devices. The invention is used for identifying the color-changing ink anti-counterfeiting label on the surface of the paper money. The CIS is characterized in that light sources different in light-emitting angles are respectively arranged at the two sides of a lens; and a non-reflecting film is adhered to the inner surface of a transparent board. As the color-changing ink anti-counterfeiting label on the surface of the genuine paper money changes in different colors from different angles, that is, the light irradiates the color-changing ink anti-counterfeiting label on the surface of the genuine paper money in different angles and the reflected light is different, but the counterfeit paper money does not have the characteristic, the light emitted by the two light sources of the CIS respectively irradiates the color-changing ink anti-counterfeiting label on the surface of the paper money in different angles, the reflected light is respectively received by the CIS, the CIS analyzes, processes and compares the two kinds of light received by the CIS and the obtained information is compared with the relevant information of the genuine paper money so as to achieve the aim of identifying authenticity of the paper money.
Description
Technical field
The present invention relates to a kind of image read-out, particularly a kind of contact-type image sensor of the color shifting ink anti-false sign for identifying note surface.
Background technology
Fig. 1 is the sectional drawing of existing contact-type image sensor, in figure, 2 is lens, 4 and 5 is two light sources with identical lighting angle, 7 is photoelectric conversion chip (light sensitive integrated devices) of receiver lens 2 converged light, 6 is the wiring boards carrying the light sensitive integrated devices 7 be arranged in a straight line, 1 is the framework holding light source 4 and light source 5, lens 2, wiring board 6, and 3 is light-passing boards of the lift-launch original copy be arranged on framework 1.
Existing contact-type image sensor light source be provided with two kinds, one is light-strip formula light source, and another kind is LED array light source, the light that two kinds of light sources send all with 45° angle through light-passing board, with identical angular illumination on original copy.
Following problem is there is: along with improving constantly of anti-counterfeiting technology in above-mentioned contact-type image sensor, present bank note has used multiple anti-counterfeiting technology, what have adds color shifting ink anti-counterfeiting mark in note surface, this anti-counterfeiting mark can present different colors from different angle viewings, namely light is with the color shifting ink anti-counterfeiting mark on different angular illumination genuine notes surfaces, light after reflection is different, and counterfeit money does not have this characteristic.The lighting angle of the light source of traditional contact-type image sensor lens both sides is identical, also with regard to the color shifting ink anti-counterfeiting mark of None-identified note surface, and therefore can not the true and false of identification note effectively.
Summary of the invention
Technical problem to be solved by this invention is: due to the color shifting ink anti-counterfeiting mark of existing contact-type image sensor None-identified note surface, a kind of contact-type image sensor being provided with two different light sources of lighting angle in lens both sides is proposed, this contact-type image sensor may be used for the color shifting ink anti-counterfeiting mark identifying note surface, reaches the object of effective identification note true and false.
The present invention can be reached by following measure.
A kind of contact-type image sensor, comprise wiring board, wiring board carries the photoelectric conversion chip be arranged in a straight line, above photoelectric conversion chip, lens are installed, the both sides of lens are respectively equipped with light source, and can hold the framework of above-mentioned wiring board, lens, light source, and the top of framework is provided with the light-passing board carrying original copy, it is characterized in that the light source luminescent angle that lens both sides are provided with is different, light-passing board inner surface attaches non reflecting film.
Contact-type image sensor reasonable in design of the present invention, be provided with the light source of two kinds of different lighting angles simultaneously, this just makes contact-type image sensor volume of the present invention little, easy to use and flexible, and this design is significant for realizing whole set equipment miniaturization.During contact-type image sensor work of the present invention, can realize two kinds of light sources and control respectively, two kinds of light source control are easy, do not need the parts of extra control light source, decrease the trouble in the manufacturing simultaneously, greatly reduce cost, be suitable for producing in enormous quantities.
Two light sources of contact-type image sensor of the present invention can adopt light-guiding strip structure or LED array formula structure.Owing to needing the kind of the bank note differentiated a lot, the color shifting ink anti-counterfeiting mark of note surface also can be diversified, according to actual conditions, the size of the lighting angle of contact-type image sensor lens two side light source can adjust, it is the angle of 20 ° or 30 ° that the lighting angle of one of them light source can adopt relative to lens axis, and it is the angle of 60 ° to 80 ° that the lighting angle of another light source can adopt relative to lens axis.Simultaneously according to the difference of color shifting ink anti-counterfeiting mark, the light of multiple different colours can be adopted to identify it, and therefore contact-type image sensor of the present invention can adopt the light source of the multiple different colours of ruddiness, green glow, blue light, white light, infrared light, ultraviolet light etc.
Contact-type image sensor of the present invention may be used for the color shifting ink anti-false sign identifying note surface, carrys out the true and false of identification note with this.Because the color shifting ink anti-counterfeiting mark on genuine notes surface can present different colors from different angle viewings, namely light is with the color shifting ink anti-counterfeiting mark on different angular illumination genuine notes surfaces, and the light after reflection is different, and counterfeit money does not have this characteristic.So use two of this contact-type image sensor light that light source is launched, respectively with different angular illumination to the color shifting ink anti-counterfeiting mark on bank note, light after reflection is received by this contact-type image sensor respectively, contact-type image sensor is analyzed the two kinds of light received again, process, relatively, the relevant information comparison of the information obtained and genuine notes, to reach the object of the identification note true and false.The light launched due to the light source of contact-type image sensor lens both sides is when arriving the inner surface of light-passing board, some light directly can be touched through lens by reflection the photoelectric conversion chip of formula imageing sensor receive, this part light does not comprise the information of note surface color shifting ink anti-counterfeiting mark, interference can be caused to result, in order to eliminate this interference, non reflecting film is attached at the inner surface of light-passing board, the light that the light source of contact-type image sensor lens both sides is launched is when arriving the inner surface of light-passing board, can not be reflected, all be irradiated on the color shifting ink anti-counterfeiting mark of note surface through light-passing board.
Accompanying drawing explanation.
Fig. 1 is the structural representation of existing contact-type image sensor.
Fig. 2 is the structural representation of operation principle of the present invention.
Fig. 3 is the structural representation of the embodiment of the present invention 1.
Fig. 4 is the structural representation of the embodiment of the present invention 2.
Fig. 5 is the structural representation of the embodiment of the present invention 3.
Embodiment.
Below in conjunction with accompanying drawing, the invention will be further described with enforcement.
Fig. 2 is the operation principle structural representation of contact-type image sensor of the present invention, in figure, 1 is framework, 2 is lens, 7 is photoelectric conversion chip of receiver lens 2 converged light, i.e. light sensitive integrated devices, 6 is the wiring boards carrying the photoelectric conversion chip be arranged in a straight line, 3 is light-passing boards of the lift-launch original copy being arranged on framework 1 top, 4 and 5 is be arranged on two different light sources of lens both sides lighting angle, 8 is original copys, i.e. bank note, 9 is regions that note surface is printed on color shifting ink anti-counterfeiting mark, and 10 is the non reflecting films being attached to light-passing board 3 inner surface.Because the color shifting ink anti-counterfeiting mark on genuine notes surface can present different colors from different angle viewings, namely light is with the color shifting ink anti-counterfeiting mark on different angular illumination genuine notes surfaces, and the light after reflection is different, and counterfeit money does not have this characteristic.During work, the light that two light sources of this contact-type image sensor are launched, respectively with different angular illumination to the color shifting ink anti-counterfeiting mark on bank note, light after reflection is received by this contact-type image sensor respectively, contact-type image sensor is analyzed the two kinds of light received again, and process, compares, the relevant information comparison of the information obtained and genuine notes, to reach the object of the identification note true and false.The light launched due to the light source of contact-type image sensor lens both sides is when arriving the inner surface of light-passing board, some light directly can be touched through lens by reflection the photoelectric conversion chip of formula imageing sensor receive, this part light does not comprise the information of note surface color shifting ink anti-counterfeiting mark, interference can be caused to result, in order to eliminate this interference, non reflecting film is attached at the inner surface of light-passing board, the light that the light source of contact-type image sensor lens both sides is launched is when arriving the inner surface of light-passing board, can not be reflected, all be irradiated on the color shifting ink anti-counterfeiting mark of note surface through light-passing board.
Embodiment 1: as shown in Figure 3, marking frame 1 in figure, lens 2, light-passing board 3, light-guiding strip structure light source 4, LED array structure light source 5, hold photoelectric conversion chip wiring board 6, photoelectric conversion chip 7, non reflecting film 8, the light source of the present embodiment lens both sides is respectively light-guiding strip structure and LED array structure, two light sources have different lighting angles, the lighting angle of two kinds of light sources can adjust as required, it is the angle of 20 ° or 30 ° that the lighting angle of one of them light source can adopt relative to lens axis, it is the angle of 60 ° to 80 ° that the lighting angle of another light source can adopt relative to lens axis.
Embodiment 2: as shown in Figure 4, marking frame 1 in figure, lens 2, light-passing board 3, light-guiding strip structure light source 4, light-guiding strip structure light source 5, hold photoelectric conversion chip wiring board 6, photoelectric conversion chip 7, non reflecting film 8, the light source of the present embodiment lens both sides all adopts light-guiding strip structure, two light sources have different lighting angles, the lighting angle of two kinds of light sources can adjust as required, it is the angle of 20 ° or 30 ° that the lighting angle of one of them light source can adopt relative to lens axis, it is the angle of 60 ° to 80 ° that the lighting angle of another light source can adopt relative to lens axis.
Embodiment 3: as shown in Figure 5, marking frame 1 in figure, lens 2, light-passing board 3, LED array structure light source 4, LED array structure light source 5, hold the wiring board 6 of photoelectric conversion chip, photoelectric conversion chip 7, non reflecting film 8, the light source of the present embodiment lens both sides all adopts LED array structure, two light sources have different lighting angles, the lighting angle of two kinds of light sources can adjust as required, it is the angle of 20 ° or 30 ° that the lighting angle of one of them light source can adopt relative to lens axis, it is the angle of 60 ° to 80 ° that the lighting angle of another light source can adopt relative to lens axis.
Claims (5)
1. a contact-type image sensor, comprise wiring board, wiring board carries the photoelectric conversion chip be arranged in a straight line, the top of photoelectric conversion chip is provided with lens, the both sides of lens are provided with light source, and can hold the framework of above-mentioned wiring board, lens, light source, and the top of framework is provided with the light-passing board carrying original copy, it is characterized in that the both sides of lens are respectively equipped with the different light source of lighting angle, light-passing board inner surface attaches non reflecting film.
2., according to the contact-type image sensor described in claim 1, it is characterized in that two light sources that the lighting angle of lens both sides is different, one is the light source of light-guiding strip structure, and another is the light source of LED array structure.
3., according to the contact-type image sensor described in claim 1, it is characterized in that different two light sources of the lighting angle of lens both sides are light-guiding strip structure.
4., according to the contact-type image sensor described in claim 1, it is characterized in that different two light sources of the lighting angle of lens both sides are LED array structure.
5., according to the contact-type image sensor described in claim 1, it is characterized in that the lighting angle of lens two side light source can adjust as required.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010567779.7A CN101986352B (en) | 2010-12-01 | 2010-12-01 | Contact image sensor |
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| CN201010567779.7A CN101986352B (en) | 2010-12-01 | 2010-12-01 | Contact image sensor |
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| CN101986352A CN101986352A (en) | 2011-03-16 |
| CN101986352B true CN101986352B (en) | 2015-04-29 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801890A (en) * | 2012-09-03 | 2012-11-28 | 威海华菱光电股份有限公司 | Contact-type image sensor |
| CN102903173A (en) * | 2012-09-29 | 2013-01-30 | 我查查信息技术(上海)有限公司 | Ticket authentication method and device based on image identification, and mobile equipment |
| CN103002192B (en) * | 2012-12-10 | 2015-05-20 | 威海华菱光电股份有限公司 | Image recognition device and image reading device |
| DE102013103527A1 (en) * | 2013-04-09 | 2014-10-09 | Bundesdruckerei Gmbh | Image recording system for image acquisition of features of an identification document |
| DE102013103522A1 (en) * | 2013-04-09 | 2014-10-09 | Bundesdruckerei Gmbh | Image recording system for image acquisition of a feature of an identification document |
| CN104063939A (en) * | 2014-06-20 | 2014-09-24 | 威海华菱光电股份有限公司 | Target object authenticity verifying method and device |
| CN104464075B (en) * | 2014-10-23 | 2018-03-16 | 深圳聚融科技股份有限公司 | A kind of detection method and its detection means of anti-adulterant |
| CN104376634B (en) * | 2014-10-23 | 2018-04-17 | 深圳聚融科技股份有限公司 | The detection method and its detection device of a kind of printed matter |
| CN107704901A (en) * | 2017-09-26 | 2018-02-16 | 厦门集信实科技有限公司 | Wiring board production coding and identifying system and method |
| CN112687710A (en) * | 2020-12-18 | 2021-04-20 | 敦南科技（无锡）有限公司 | Single linear image sensor |
| CN113658940A (en) * | 2021-09-09 | 2021-11-16 | 奥斯特原点(广东)科技有限公司 | Stacked anti-counterfeiting chip |
| CN115083066B (en) * | 2022-07-20 | 2022-12-06 | 恒银金融科技股份有限公司 | Method and device for detecting whether paper currency is old or new based on digital image |
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| CN101986352A (en) | 2011-03-16 |
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Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Applicant after: Weihai Hualing Opto-electronics Co.,Ltd. Address before: 264209 Torch Road, Weihai hi tech Industrial Development Zone, Shandong, Weihai 159, China Applicant before: Weihai Hualing Optoelectronic Co., Ltd. |
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