CN102281380A - Image scanning device with combination light path and speed compensation unit - Google Patents
Image scanning device with combination light path and speed compensation unit Download PDFInfo
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- CN102281380A CN102281380A CN2011102670199A CN201110267019A CN102281380A CN 102281380 A CN102281380 A CN 102281380A CN 2011102670199 A CN2011102670199 A CN 2011102670199A CN 201110267019 A CN201110267019 A CN 201110267019A CN 102281380 A CN102281380 A CN 102281380A
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Abstract
An image scanning device with a combination light path and a speed compensation unit is disclosed. The image scanning device comprises a X-directional main scanning light path, a Y-directional subscanning light path and a speed compensation operation module. Through a group of reflectors, the subscanning light path rotates the 90 DEG of the Y-directional light path to the X direction and makes the Y-directional light path be parallelly output with the X-directional main scanning light path. A distortion image generated in a scanning motion direction is reduced and speed compensation is performed to image data obtained by the main scanning through the subscanning so that a quality of the image can be guaranteed.
Description
Technical field
The present invention relates to a kind of image-scanning device, particularly, anamorphose is compensated by writing scan process medium velocity change curve at the device of the enterprising line distortion compensation of scanning motion direction.
Background technology
Chinese patent CN201491107 " image-scanning device that has speed record and compensating module ", comprise Master Scanner, transmission mechanism, velocity compensation unit, wherein disclose the image-scanning device that the distortion of scanning process is compensated by writing scan speed.
Chinese patent CN201830342 " image-scanning device that has the velocity compensation unit " discloses the sweep speed record that is applicable to flat bed scanner and the design and the structure of compensating unit.
Chinese patent CN2509593 " flat ccd scanner headstock light channel structure " discloses flatbed scanner headstock light channel structure.This shows, the main scanning of flat bed scanner by reflected light path obtain image, because main scanning headstock light channel structure more complicated, therefore on the main scanning support, increase the subscan assembly of the velocity variations image that is used to take scanning process, have certain difficulty and complexity.
Summary of the invention
Purpose of the present invention then is at above-mentioned the deficiencies in the prior art, by the application combination light path, with the view data merging output of main scanning and subscan, by subscan the view data that main scanning obtains is carried out velocity compensation, guarantees the quality of image.
Purpose of the present invention can realize by following measure: in image-scanning device, comprise X to main scanning light path and Y to the subscan light path, X to the main scanning light path be used to receive X to the master copy image of input, Y to the subscan light path be used to receive Y to the sweep speed of input with reference to image.The main scanning light path is exported X by one group of speculum after original image rotates to an angle along directions X; The subscan light path by one group of speculum with Y direction light path revolve turn 90 degrees to directions X and along directions X rotate to an angle back and X to main scanning light path and line output, absorb the directions X master copy image and the scanning shift Y direction and velocity characteristic image simultaneously by one group of lens and photo-electric conversion element at last.
For guaranteeing the precision of imaging, X is to the total optical path L1 of main scanning light path and Y imaging effect the best when the total optical path L2 of subscan light path is identical, if structural design can't satisfy this requirement, the gap that also should guarantee total optical path L2 and total optical path L1 less than total optical path L1 ± 10%, i.e. L1*0.9＜L2＜L1*1.1.
The velocity compensation computing module can adopt single-chip microcomputer, the image that have Y scanning direction movement velocity feature captured according to subscan, the velocity compensation computing module at first calculates the scan speed change parameter curve, and then by this parameter curve the image fault that is produced on the Y direction is reduced.
Beneficial effect of the present invention is:
By combined optical path, can make the shared one group of speculum of main scanning and subscan, lens and photo-electric conversion element 1 imaging, not needing additionally increases independently imaging system to subscan.This project organization compactness, improvement cost are low, easier being integrated among the main scanning headstock.
Description of drawings
Fig. 1 is a scanner main scanning light path schematic diagram.
Fig. 2 is the combined optical path schematic diagram of main scanning+subscan of the present invention.
Among the figure: 1: photo-electric conversion element; 2, with reference to background; DOC, original copy to be scanned;
Main scanning light path speculum: M1, M2, M3;
Subscan light path speculum: My0, My1, M2, M3; Lens M4.
Embodiment
Rely on the basic general knowledge of this area below, in conjunction with the accompanying drawings the present invention be further described:
As shown in Figure 1,3 speculums of scanner main scanning optical routing (M1, M2, M3), lens M4 constitute.3 speculums all distribute along X axis, and 3 speculums are respectively 135 degree, 315 degree, 225 degree with the angle of scan manuscript, and the outbound course Lx4 of main scanning light path is that input direction Lx1 spends with X-axis rotation 270 behind 3 secondary reflections.
The main scanning light path is divided into 4 sections, total optical path L1=Lx1+Lx2+Lx3+Lx4.Wherein the scope of light path Lx2 section is the zone within dotted arrow X1 and the X2; The scope of light path Lx4 section is the zone within dotted arrow X3 and the X4.Final scioptics M4 projects imaging on the photo-electric conversion element 1.
As shown in Figure 2, the image-scanning device that has combined optical path and velocity compensation unit of the present invention, the sweep limits of subscan is the included scope of the dotted arrow of Y direction from Y1 to Y2.
In the shooting area of subscan, can reference background 2 be set at Y along Y direction (being in the Y directional run scope of scanning motion).Have one group of parallel striped on the reference background 2, the direction of these stripeds is parallel with X axis.
In the scanning motion process, the image of reference background 2 in one section zone of Y direction taken in subscan in real time, this shooting area is along with the same moved further of scanning motion, so the image that subscan is obtained is the movable image of striped background with respect to scanning motion, promptly be to contain the displacement of scanning motion and the image of velocity characteristic, finally by monitoring and the reduction of velocity characteristic data realization to distorted image.
Because extracting the scanning shift feature by subscan is to adopt the method that is analyzed with adjacent data, so Y does not need very big to the width of subscan light path.When the subscan width more hour, it is also just more little to the adjustment of scanner structure to increase the subscan light path, so the width D y of subscan light path can be set at 5mm-30mm.
Embodiment:
Present embodiment in conjunction with the accompanying drawings 1 and accompanying drawing 2 illustrates as how main scanning light path goes up for the basis subscan light path is superposeed into, forms combined optical path.
As shown in Figure 2, on maintenance main scanning light path basis of invariable shown in Figure 1, side in the main scanning light path has increased by 2 speculums (My0, Mxy1), and with shared back 2 speculums of main scanning light path (M2, M3), main scanning and subscan image project on the lens M4 in the lump the most at last, again by photo-electric conversion element 1 imaging.Wherein:
1, mirror M y0 along Y-axis to distribute, with the angle of the striated background 2 of Y direction be 135 degree, after mirror M y0 reflection, the image light path of striated background 2 serves as that axle has rotated 90 degree with the Y direction, the light path from the background baffle plate to mirror M y0 is Ly0;
2, mirror M xy1 at first along Y-axis to distribute, with the angle of the reference background 2 of Y direction be 90 degree, and then with Z axle rotation 45 degree, like this by after the mirror M y1 reflection, the image light path of reference background 2 promptly from the Y direction transformation to directions X, consistent with the direction of the LX2 section of main scanning light path, the light path from mirror M y0 to mirror M y1 is Lxy1.
The subscan light path is divided into 5 sections, total optical path L2=Ly0+Lxy1+Lx2+Lx3+Lx4.The effective range of the Ly0 of subscan light path as shown in Figure 2, section is to be zone within dotted arrow Y1 and the Y2.Subscan light path and main scanning light path are converged in the LX2 section and are formed same direction output, and the effective range of wherein subscan light path Lx2 section is to be zone within dotted arrow Xy1 and the Xy2; The effective range of main scanning light path Lx2 section is to be zone within dotted arrow X1 and the X2.After subscan light path and main scanning light path were converged, final scioptics M4 projected imaging on the photo-electric conversion element 1.
Main scanning light path and subscan light path can be opened by lighttight barrier partitions, thereby form two relatively independent light paths, to guarantee to obtain optical effect preferably.The position of plate washer is arranged between dotted line X2 and the Xy2.
Above embodiment is not to concrete restriction of the present invention, is not breaking away from claims restricted portion of the present invention, can make all concrete modifications to this device.
Claims (8)
1. the image-scanning device that has combined optical path and velocity compensation unit, it is characterized in that: this image-scanning device comprises that X is to the main scanning light path, Y is to subscan light path and velocity compensation computing module, wherein subscan light path is revolved Y direction input light path to turn 90 degrees to directions X by one group of speculum and is exported, and with X to main scanning light path and line output, wherein the image that has Y scanning direction movement velocity feature is taken in subscan, the velocity compensation computing module at first calculates the scan speed change parameter curve according to this velocity characteristic image, by this parameter curve the image fault that is produced on the Y direction is reduced then.
2. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1, it is characterized in that: described X can shared one or several speculum to the subscan light path to main scanning light path and Y, and shared one group of lens and photo-electric conversion element (1), the splicing of the image of X and Y direction is merged Polaroid, promptly absorb the directions X master copy image and the scanning shift Y direction and velocity characteristic image simultaneously.
3. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1, it is characterized in that: described X is set at identical or total optical path L2 and total optical path L1 to the total optical path L2 of subscan light path to the total optical path L1 of main scanning light path and Y gap less than total optical path L1 ± 10%, i.e. L1*0.9＜L2＜L1*1.1.
4. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1, it is characterized in that: described Y comprises a steering reflection mirror at least in the subscan light path, this speculum is along Z axle rotation 45 degree, makes the subscan light path revolve to turn 90 degrees, goes to directions X output from the input of Y direction.
5. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1, it is characterized in that: described Y is in the shooting area of subscan, be provided with reference to background (2) along the Y direction, in the scanning motion process, subscan promptly obtains the displacement of scanning motion and the image of velocity characteristic by the variation of taking with reference to background (2).
6. the image-scanning device that has combined optical path and velocity compensation unit according to claim 5 is characterized in that: with reference to background (2) is the striated background that has one group of parallel lines, and the direction of parallel lines is parallel with X axis.
7. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1 is characterized in that: described Y is 5mm-30mm to the width D y of subscan light path.
8. the image-scanning device that has combined optical path and velocity compensation unit according to claim 1 is characterized in that: by lighttight baffle plate main scanning light path and subscan light path are separated, formed two relatively independent light paths.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102670199A CN102281380A (en) | 2011-09-09 | 2011-09-09 | Image scanning device with combination light path and speed compensation unit |
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| CN2011102670199A CN102281380A (en) | 2011-09-09 | 2011-09-09 | Image scanning device with combination light path and speed compensation unit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5539532A (en) * | 1993-08-12 | 1996-07-23 | Nec Corporation | Image reading apparatus with varied subscanning speed |
| CN1244682A (en) * | 1998-08-06 | 2000-02-16 | 鸿友科技股份有限公司 | Closed-loop controller and control method for improving the scanning quality of gimbal scanner |
| CN201491107U (en) * | 2009-07-20 | 2010-05-26 | 吴伟佳 | Image scanning device with speed recording and compensating module |
| US20100157380A1 (en) * | 2008-12-22 | 2010-06-24 | Kyocera Mita Corporation | Image Reader And Method For Adjusting Magnification Accuracy Of Image Reader |
| CN201830342U (en) * | 2010-07-21 | 2011-05-11 | 吴伟佳 | Image scanning device with speed compensating unit |
| CN102170513A (en) * | 2011-03-02 | 2011-08-31 | 吴伟佳 | Image scanning device with speed compensation unit and compensation method thereof |
-
2011
- 2011-09-09 CN CN2011102670199A patent/CN102281380A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5539532A (en) * | 1993-08-12 | 1996-07-23 | Nec Corporation | Image reading apparatus with varied subscanning speed |
| CN1244682A (en) * | 1998-08-06 | 2000-02-16 | 鸿友科技股份有限公司 | Closed-loop controller and control method for improving the scanning quality of gimbal scanner |
| US20100157380A1 (en) * | 2008-12-22 | 2010-06-24 | Kyocera Mita Corporation | Image Reader And Method For Adjusting Magnification Accuracy Of Image Reader |
| CN201491107U (en) * | 2009-07-20 | 2010-05-26 | 吴伟佳 | Image scanning device with speed recording and compensating module |
| CN201830342U (en) * | 2010-07-21 | 2011-05-11 | 吴伟佳 | Image scanning device with speed compensating unit |
| CN102170513A (en) * | 2011-03-02 | 2011-08-31 | 吴伟佳 | Image scanning device with speed compensation unit and compensation method thereof |
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Application publication date: 20111214 |