CN110138998A - Image scan method and imaging sensor - Google Patents
Image scan method and imaging sensor Download PDFInfo
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- CN110138998A CN110138998A CN201910399466.6A CN201910399466A CN110138998A CN 110138998 A CN110138998 A CN 110138998A CN 201910399466 A CN201910399466 A CN 201910399466A CN 110138998 A CN110138998 A CN 110138998A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000003287 optical effect Effects 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 238000005286 illumination Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003086 colorant Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000003760 hair shine Effects 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000005055 memory storage Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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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
-
- 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
- H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
- H04N1/0282—Using a single or a few point light sources, e.g. a laser diode
-
- 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
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Heads (AREA)
Abstract
The present invention provides a kind of image scan method and imaging sensors.Wherein, image scan method includes: when being scanned using imaging sensor to original copy, the first light source transmitting UV light of imaging sensor simultaneously irradiates original copy, while can emit the switching luminescent color of the second light source selectivity of visible light and be irradiated to original copy.The present invention solves the problems, such as that the phosphor pattern information collection time of UV light irradiation excitation in the prior art is long and imaging effect is poor.
Description
Technical field
The present invention relates to field of image detection, in particular to a kind of image scan method and imaging sensor.
Background technique
With the development of information technology, in financial field, the anti-fake means such as bank note, bill are more and more diversified, in addition to glimmering
Outside the counterfeit protection measures such as optical information, phosphorescence information is also applied to the anti-fake of financial field.Due to the phosphorescence information on bank note, bill
It is weaker, need stronger UV light irradiation excitation and UV light to need to be radiated at a certain angle above imaging sensor optical lens
Phosphorescence information area can just read phosphor pattern information, currently limited by UV light luminous intensity, even if UV light is with certain
When phosphorescence information area imaging sensor of the angular illumination above imaging sensor optical lens reads phosphorescence information line by line
Image cannot be clearly read, needs UV light fluorescent lifetime to be lengthened, with enhancing using the main scanning direction line-scanning period is extended
The time of irradiation excitation phosphorescence information reads phosphor pattern.By extending the UV fluorescent lifetime of every row scanning, make image sensing
The sweep time of the every row of device main scanning direction is elongated, and scanning speed is slack-off.Make the scanning of imaging sensor sub-scanning direction simultaneously
It slows, makes the reduction of image sub-scanning direction resolution ratio.
It can be seen from the above, the phosphor pattern information collection time that the irradiation excitation of UV light exists in the prior art is long and imaging is imitated
The problem of fruit difference.
Summary of the invention
The main purpose of the present invention is to provide a kind of image scan method and imaging sensors, to solve in the prior art
The phosphor pattern information collection time length of UV light irradiation excitation and the problem of imaging effect difference.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of image scan method, image scanning
Method includes: when being scanned using imaging sensor to original copy, and the first light source of imaging sensor emits UV light and to original
Original text irradiation, while the switching luminescent color of the second light source selectivity of visible light can be emitted and original copy is irradiated.
Further, image scan method further include: within a line-scanning period of imaging sensor, second light source is only
The light for emitting a kind of color is scanned original copy；After imaging sensor completes a line-scanning period, switch second light source
The color of transmitting, and the content of scanning of the upper line-scanning period was scanned again again, until second light source completes institute
After the switching of coloured light, the scan position of original copy is converted, until all closing first light source after the completion of scanning.
Further, image scan method further include: second light source can issue the light of N kind color, according in original copy
Hold, the practical switching of second light source is irradiated original copy using the light of n kind color, and n is less than or equal to N, and n is in same a line
Hold the number for the line-scanning period being scanned.
Further, second light source emits at least one of feux rouges, green light, blue light, infrared light respectively, with to original copy into
Row irradiation.
Further, image scan method further include: imaging sensor can store the figure of each line-scanning period scanning
As information, and the image information obtained to original copy with the optical scanning of the different colours of a line does subtraction process, to obtain UV light
Image information and visible light image information.
Further, subtraction process include: the UV light that will be only irradiated with first light source image information and each row
The image information obtained in scan period makes the difference, to obtain the image information of visible light in each line-scanning period.
According to another aspect of the present invention, a kind of imaging sensor is provided, comprising: cabinet, cabinet have detection faces；Light
Source, for the direction of illumination of light source towards detection faces, light source includes first light source and second light source, and first light source is UV light source, and second
Light source includes the LED light source of at least one transmitting visible light, and when imaging sensor is scanned original copy, first light source is to original
Original text irradiation, and the switching luminescent color of second light source selectivity and original copy is irradiated；Photoelectric conversion chip, photoelectric conversion core
Piece setting is in box house, and photoelectric conversion chip has photosensitive form；Optical lens, optical lens are arranged in box house,
And one end of optical lens is towards detection faces, the other end of optical lens is towards photosensitive form.
Further, second light source includes changeable red-light source, green-light source, the blue light source used.
Further, second light source keeps a kind of color of visible light not within a line-scanning period of imaging sensor
Become, and when entering next line-scanning period, switches the luminescent color of second light source.
Further, first light source is located at the outside of cabinet；Second light source is located at the inside of cabinet.
Further, first light source and second light source are located at the two sides of optical lens；Or first light source and the second light
Source is located at the same side of optical lens.
Further, imaging sensor further include: wiring board, wiring board are arranged in box house, and photoelectric conversion chip
Box house is fixed on by wiring board；And/or transparent panel, transparent panel are located in detection faces；And/or image processing unit,
Image processing unit receives and processes the electric signal of photoelectric conversion chip output.
Further, imaging sensor further includes image processing unit, and image processing unit receives and processes photoelectric conversion
The electric signal of chip output, image processing unit include: memory, the telecommunications that memory storage photoelectric conversion chip exports every time
Number；Amplifier, the electric signal that amplifier exports photoelectric conversion chip amplify；Processing center, processing center receive and locate
The amplified electric signal of amplifier is managed, and processing center can export image information outward；Display, display are received and are shown
Show the image information of processing center output.
It applies the technical scheme of the present invention, the image scan method in the application includes: in use imaging sensor to original
When original text is scanned, the first light source of imaging sensor transmitting UV light simultaneously irradiates original copy, while can emit the of visible light
The switching luminescent color of two light sources selectivity is simultaneously irradiated original copy.
Using above-mentioned image surface sweeping method, when imaging sensor is scanned original copy using the visible light of different colours
When, while opening UV light source and excitation is irradiated to original copy.Imaging sensor completes different color light to the image of original copy in this way
After scanning, UV light persistently irradiates certain time to original copy at this time, therefore, when the image for needing to acquire original copy the irradiation of UV light
When information, image scanning acquisition can be directly carried out, without extending irradiation time during acquisition, is effectively shortened
The duration of Image Acquisition, while can also improve the quality of Image Acquisition information.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of imaging sensor in embodiment one；
Fig. 2 shows the structural schematic diagrams of imaging sensor in embodiment two；
Fig. 3 shows the structural schematic diagram of imaging sensor in embodiment three；
Fig. 4 shows the structural schematic diagram of imaging sensor in example IV；
Fig. 5 shows control output schematic diagram when first light source scanning is used alone；
Control when Fig. 6 shows first light source and second light source while opening exports schematic diagram；
Fig. 7 shows the image information subtraction process schematic diagram of imaging sensor.
Wherein, the above drawings include the following reference numerals:
10, first light source；20, second light source；30, cabinet；40, photoelectric conversion chip；50, optical lens；60, transparent
Plate.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have and the application
The normally understood identical meanings of person of an ordinary skill in the technical field.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is usually needle
For direction shown in the drawings, or for component itself is on vertical, vertical or gravity direction；Equally
Ground for ease of understanding and describes, and " inside and outside " refers to the inside and outside of the profile relative to each component itself, but the above-mentioned noun of locality is not
For limiting the present invention.
The phosphor pattern information collection time in order to solve the irradiation excitation of UV light in the prior art is long and imaging effect difference
Problem, this application provides a kind of image scan method and imaging sensors.
Wherein, the imaging sensor in the application can be applied to the image scan method in the application.
It applies the technical scheme of the present invention, the image scan method in the application includes: in use imaging sensor to original
When original text is scanned, the first light source 10 of imaging sensor emits UV light and irradiates to original copy, while can emit visible light
The switching luminescent color of 20 selectivity of second light source is simultaneously irradiated original copy.The UV that the first light source 10 of imaging sensor emits
The light circulation of the second light source 20 of light and transmitting visible light, which shines, irradiates original copy, while second light source 20 switches luminescent color
Selectivity allows first light source 10 to emit UV light.
Using above-mentioned image surface sweeping method, when imaging sensor is scanned original copy using the visible light of different colours
When, while opening UV light source and excitation is irradiated to original copy.Imaging sensor completes different color light to the image of original copy in this way
After scanning, UV light persistently irradiates certain time to original copy at this time, therefore, when the image for needing to acquire original copy the irradiation of UV light
When information, image scanning acquisition can be directly carried out, without extending irradiation time during acquisition, is effectively shortened
The duration of Image Acquisition, while can also improve the quality of Image Acquisition information.
It should be noted that in this application, when being scanned using imaging sensor to original copy, first light source 10 is issued
UV light is irradiated original copy, and original copy can generate phosphorescence information, and imaging sensor does not stop to move, and is scanned to original copy
And record phosphorescence information.
Specifically, image scan method further include: within a line-scanning period of imaging sensor, second light source 20 is only
The light for emitting a kind of color is scanned original copy；After imaging sensor completes a line-scanning period, switch second light source
The color of 20 transmittings, and the content of scanning of the upper line-scanning period was scanned again again, until second light source 20 is complete
After switching at the light of all colours, the scan position of original copy is converted, until all closing first light source 10 after the completion of scanning.?
When being irradiated using the light of different colours in second light source 20 to the same position of original copy, a kind of radiation of visible light of color
Duration is a scan period, opens first light source 10 within each scan period of second light source 20 and shines original copy
It penetrates, in this way in completing second light source 20 after the acquisition of the image scanning information of the light of different colours, first light source 10 is right
The same position of original copy completes Multiple-Scan, therefore on the basis of not extending scanning duration, effectively increases UV light to original
The irradiation time of original text.
Optionally, image scan method further include: second light source 20 can issue the light of N kind color, according in original copy
Hold, the practical switching of second light source 20 is irradiated original copy using the light of n kind color, and n is less than or equal to N, and n is to same a line
The number for the line-scanning period that content is scanned.Since second light source 20 can issue the visible light of multiple color, and right
When a certain specific picture original is scanned, it may not be necessary to be scanned using the visible light of whole colors, therefore n is less than
Equal to N.
As shown in figure 5, keeping image sensor line to sweep when imaging sensor progressively scans the original copy of phosphorous light image information
Retouch that the period is constant, the scanning of first light source 10 is read different according to the power of phosphorescence information before phosphorescence information, is further added by row several times and is swept
10 scanning times of first light source in the period are retouched, SIG phosphorescence is reading preceding phosphorescence information by first light source 10 by imaging sensor
Excitation has been irradiated repeatedly, phosphorescent signal enhanced strength after phosphorescence information is repeatedly irradiated on original copy, when image sensor scan phosphorus
When optical information region, imaging sensor, which can be scanned clearly, reads phosphorescence information.
As shown in fig. 6, when scanning the original copy of image information for also needing to scan other coloured light outside phosphorescence information image.Figure
As the every row of sensor progressive scan, the light that second light source 20 emits different colours respectively is irradiated (led1, led2, led3 points
The light of different colours is not represented), meanwhile, first light source 10 is persistently irradiated to original copy or the first light source 10 of imaging sensor
The light circulation of the second light source 20 of the UV light and transmitting visible light of transmitting, which shines, irradiates original copy, and second light source 20 switches the face that shines
Selectivity allows the transmitting UV light of first light source 10 that first light source 10 is made to light phosphorescence information quilt before reading phosphorescence information while color
The multiple excitation of first light source 10 irradiation, so that phosphorescence information obtains accumulation enhancing, imaging sensor can clearly read phosphorescence
Image.
The relationship between sweep time and signal output is shown in fig. 5 and fig..Specifically, leduv ON is to open
First light source 10, horizontal-scanning interval line1, horizontal-scanning interval line2, line3 ... horizontal-scanning interval, lineN horizontal-scanning interval
With first line-scanning period of a line, second line-scanning period, third line-scanning period ... .. N respectively on original copy
A line-scanning period.Same led1ON, led2ON, led3ON respectively indicate the light for opening different colours in second light source 20.Letter
SIG represents visible light signal in number output, and SIG phosphorescence be that the signal generated when the irradiation of first light source 10 is used alone.
Optionally, second light source 20 emits at least one of feux rouges, green light, blue light, infrared light respectively, with to original copy into
Row irradiation.Certainly, the type of the second light source 20 in the application is not limited to above-mentioned four kinds, can also be added according to actual demand
Add the type of the color of visible light.
Specifically, image scan method further include: imaging sensor can store the image of each line-scanning period scanning
Information, and the image information obtained to original copy with the optical scanning of the different colours of a line does subtraction process, to obtain UV light
The image information of image information and visible light.Due to using second light source 20 to original copy carry out image scanning acquisition when, first
Light source 10 persistently carries out the UV light of the transmitting of first light source 10 of the irradiation of UV light or imaging sensor to original copy and emits visible light
The light circulation of second light source 20, which shines, irradiates original copy, and selectivity allows the first light while second light source 20 switches luminescent color
Source 10 emits UV light, and therefore, acquired image data are not the scan data of solid color light, wherein further comprising UV light
The image scan data of irradiation.So to obtain a certain monochromatic image scanning information needing that a certain monochrome will be being used
The scan data that light obtains subtracts the image scan data of UV light.
Specifically, subtraction process includes: by the image information for only irradiating obtained UV light with first light source 10 and each row
The image information obtained in scan period makes the difference, to obtain the image information of visible light in each line-scanning period.
As shown in fig. 7, the image information subtraction process schematic diagram of as imaging sensor.Led1 optical information, led2 light letter
Breath, led3 optical information are respectively the information obtained using the radiation of visible light of different colours in second light source 20, and phosphorescence information is
The information obtained to use first light source 10 to irradiate.Specifically, original copy is irradiated using first light source 10 and second light source 20 together,
And first light source 10 irradiate during, switch second light source 20 three kinds of colors, respectively obtain led1 information+phosphorescence information,
Led2 information+phosphorescence information, led3 optical information+phosphorescence information, and phosphorescence information is obtained in the case where closing second light source 20, and
It is made respectively with phosphorescence information of led1 information+phosphorescence information, led2 information+phosphorescence information, led3 optical information+phosphorescence information again afterwards
Difference to obtain led1 optical information, led2 optical information, led3 optical information, and above-mentioned optical information is exported.
According to another aspect of the present invention, a kind of imaging sensor, including cabinet 30, light source and optical lens are provided
50.Cabinet 30 has detection faces；For the direction of illumination of light source towards detection faces, light source includes first light source 10 and second light source 20,
First light source 10 is UV light source, and second light source 20 includes the LED light source of at least one transmitting visible light, in imaging sensor to original
First light source 10 irradiates original copy when original text is scanned, and the switching luminescent color of the selectivity of second light source 20 and carries out to original copy
Irradiation；Photoelectric conversion chip 40, photoelectric conversion chip 40 are arranged inside cabinet 30, and photoelectric conversion chip 40 has photosensitive view
Window；Optical lens 50 is arranged inside cabinet 30, and one end of optical lens 50 is towards detection faces, the other end of optical lens 50
Towards photosensitive form.When being scanned using imaging sensor to original copy, original copy part to be scanned can be directed at cabinet 30
Detection faces, in this way be arranged after, can allow second light source 20 only to alignment detection faces part original copy be irradiated, thus
It ensure that the accuracy of image sensor scan.
Optionally, second light source 20 includes changeable red-light source, green-light source, the blue light source used.In this way,
The scanning information of other color visibles can be synthesized by the scanning information of red-light source, green-light source and blue light source.
It is of course also possible to according to the actual situation, second light source 20 be allow to issue the visible light of other colors.That is second light source
The type of the color of 20 visible lights that can be issued does not include above-mentioned three kinds.
Specifically, second light source 20 keeps a kind of color of visible light not within a line-scanning period of imaging sensor
Become, and when entering next line-scanning period, switches the luminescent color of second light source 20.That is, to the same of original copy
When one position is scanned, a kind of scanning duration of the light of color of second light source 20 is a scan period.From another party
Face is seen, when being scanned using second light source 20 to original copy, a kind of every light using color is scanned original copy, Bian Huizeng
The UV light i.e. first light source 10 of a cycle is added to irradiate duration.
Specifically, imaging sensor further include: wiring board, transparent panel 60 and image processing unit.Wiring board is arranged in case
Inside body 30, and photoelectric conversion chip 40 is fixed on inside cabinet 30 by wiring board；Transparent panel 60 is located in detection faces；Figure
As processing unit receives and processes the electric signal of the output of photoelectric conversion chip 40.Wiring board is arranged can be to the electricity inside cabinet 30
Line is arranged, and be arranged image processing unit can the scanning result to imaging sensor carry out processing analysis.
Optionally, imaging sensor further includes image processing unit, memory, amplifier, processing center and display.Figure
As processing unit receive and process photoelectric conversion chip 40 output electric signal, image processing unit include: memory storage light
The electric signal that electric conversion chip 40 exports every time；The electric signal that amplifier exports photoelectric conversion chip 40 amplifies；Processing
Center receives and processes the amplified electric signal of amplifier, and processing center can export image information outward；Display connects
Receive and show the image information of processing center output.
Optionally, first light source 10 is located at the outside of cabinet 30；Second light source 20 is located at the inside of cabinet 30.Further
Ground, first light source 10 and second light source 20 are located at the two sides of optical lens 50；Or first light source 10 and second light source 20
In the same side of optical lens 50.It is of course also possible to which first light source 10 is similarly disposed at 30 inside of cabinet.It can be according to practical feelings
Condition selects the arrangement of first light source 10 and second light source 20.
Embodiment one
As shown in Figure 1, first light source 10 and second light source 20 are respectively positioned on inside cabinet 30, and first light source 10 and second
The light that light source 20 issues can be irradiated the scan position of original copy through the transparent panel 60 that detection faces are arranged in.
It should be noted that needing to consider the refraction action of transparent panel 60 to guarantee to scan effect.
And by setting transparent panel 60, dust can be prevented to fall into cabinet by detection faces when imaging sensor does not work
Inside 30, to guarantee the scanning effect of imaging sensor.
Embodiment two
As shown in Fig. 2, the setting of first light source 10 is in 30 outside of cabinet, the setting of second light source 20 is in 30 inside of cabinet.And
First light source 10 and second light source 20 are located at the two sides of optical lens 50.
It is arranged in this way, first light source 10 and second light source 20 can be made to be shone respectively with different angles original copy
It penetrates.
Embodiment three
As shown in figure 3, the setting of first light source 10 is in 30 outside of cabinet, the setting of second light source 20 is in 30 inside of cabinet.And
First light source 10 is two, and is separately positioned on the two sides of optical lens 50.
And it is possible to according to the actual situation, can choose two first light sources 10 and meanwhile open or individually open into
Row scanning.When two first light sources 10 are all turned on, it can effectively enhance the exposure intensity of UV light.
Example IV
As shown in figure 4, the setting of first light source 10 is in 30 outside of cabinet, the setting of second light source 20 is in 30 inside of cabinet.And
When being scanned to original copy, first light source 10 and second light source 20 are located at the two sides of original copy, i.e., first light source 10 is by original copy
The back side original copy is irradiated, second light source 20 is just irradiated in face of original copy by original copy.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
1, the horizontal-scanning interval of extension imaging sensor is not needed；
2, the clarity for the scan image that imaging sensor obtains is improved；
3, scanning information is accurate.
Obviously, above-mentioned the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments should fall within the scope of the present invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, work, device, component and/or their combination.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein can be in addition to illustrating herein
Or the sequence other than those of description is implemented.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of image scan method, which is characterized in that described image scan method includes:
When being scanned using imaging sensor to original copy, first light source (10) the transmitting UV light of described image sensor is simultaneously right
Original copy irradiation, while the switching luminescent color of second light source (20) selectivity of visible light can be emitted and to the original copy
It is irradiated.
2. image scan method according to claim 1, which is characterized in that described image scan method further include:
Within a line-scanning period of described image sensor, the second light source (20) only emits a kind of light of color to institute
Original copy is stated to be scanned；
After described image sensor completes a line-scanning period, switch the color of the second light source (20) transmitting,
And the content of the upper one line-scanning period scanning is scanned again again, until the second light source (20) complete institute
After the switching of coloured light, the scan position of the original copy is converted, until all closing the first light source after the completion of scanning
(10)。
3. image scan method according to claim 1, which is characterized in that described image scan method further include:
The second light source (20) can issue the light of N kind color, and according to the content of the original copy, the second light source (20) is real
Border switching is irradiated the original copy using the light of n kind color, and n is less than or equal to N, and n is to sweep to same a line content
The number for the line-scanning period retouched.
4. image scan method according to claim 1, which is characterized in that the second light source (20) emits red respectively
At least one of light, green light, blue light, infrared light, to be irradiated to the original copy.
5. image scan method according to claim 1, which is characterized in that described image scan method further include:
Described image sensor can store the image information of each line-scanning period scanning, and to the original copy with a line not
The image information obtained with the optical scanning of color does subtraction process, thus obtain the UV light image information and the visible light
Image information.
6. image scan method according to claim 5, which is characterized in that the subtraction process includes:
In the image information and each line-scanning period of the UV light that will be only obtained with the first light source (10) irradiation
Obtained image information makes the difference, to obtain the image information of the visible light in each line-scanning period.
7. a kind of imaging sensor characterized by comprising
Cabinet (30), the cabinet (30) have detection faces；
Light source, for the direction of illumination of the light source towards the detection faces, the light source includes first light source (10) and second light source
(20), the first light source (10) is UV light source, and the second light source (20) includes the LED light of at least one transmitting visible light
Source, when described image sensor is scanned original copy, the first light source (10) irradiates the original copy, and described second
The switching luminescent color of light source (20) selectivity is simultaneously irradiated the original copy；
Photoelectric conversion chip (40), photoelectric conversion chip (40) setting is internal in the cabinet (30), and the photoelectricity turns
Chip (40) are changed with photosensitive form；
Optical lens (50), optical lens (50) setting is internal in the cabinet (30), and the optical lens (50)
One end is towards the detection faces, and the other end of the optical lens (50) is towards the photosensitive form.
8. imaging sensor according to claim 7, which is characterized in that the second light source (20) includes changeable uses
Red-light source, green-light source, blue light source.
9. imaging sensor according to claim 7, which is characterized in that scan week in a row of described image sensor
The second light source (20) keeps a kind of color of visible light constant in phase, and when entering next line-scanning period, switching
The luminescent color of the second light source (20).
10. imaging sensor according to any one of claims 7 to 9, which is characterized in that
The first light source (10) is located at the outside of the cabinet (30)；The second light source (20) is located at the cabinet (30)
Inside.
11. imaging sensor according to claim 10, which is characterized in that
The first light source (10) and the second light source (20) are located at the two sides of the optical lens (50)；Or
The first light source (10) and the second light source (20) are located at the same side of the optical lens (50).
12. imaging sensor according to any one of claims 7 to 9, which is characterized in that described image sensor is also wrapped
It includes:
Wiring board, the wiring board setting is internal in the cabinet (30), and the photoelectric conversion chip (40) passes through the line
It is internal that road plate is fixed on the cabinet (30)；And/or
Transparent panel (60), the transparent panel (60) are located in the detection faces；And/or
Image processing unit, described image processing unit receive and process the electric signal of the photoelectric conversion chip (40) output.
13. imaging sensor according to any one of claims 7 to 9, which is characterized in that described image sensor is also wrapped
Image processing unit is included, described image processing unit receives and processes the electric signal of the photoelectric conversion chip (40) output, figure
As processing unit includes:
Memory, the memory store the electric signal that the photoelectric conversion chip (40) exports every time；
Amplifier, the electric signal that the amplifier exports the photoelectric conversion chip (40) amplify；
Processing center, the processing center receive and process the amplified electric signal of the amplifier, and the processing center
Image information can be exported outward；
Display, the display receive and show the image information of the processing center output.
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