CN1101564C - Method for controlling multi-lens shift mechanism - Google Patents
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- CN1101564C CN1101564C CN 98123486 CN98123486A CN1101564C CN 1101564 C CN1101564 C CN 1101564C CN 98123486 CN98123486 CN 98123486 CN 98123486 A CN98123486 A CN 98123486A CN 1101564 C CN1101564 C CN 1101564C
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- 238000000034 method Methods 0.000 title claims abstract description 58
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- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 3
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Abstract
The present invention relates to a control method of a multi-lens shift mechanism. During the switching and shifting period of lenses, a photoelectric conversion element continuously reads an image corresponding to the linear scanning range of a manuscript. A sign is made in an image reading zone, and the sign forms an image at the pixel position of the photoelectric conversion element by a lens. Whether the lens is positioned at the correct position is judged by a setting rule. The position of the lens is fed back by a signal to control the movement of the lens all the time, and the movement of the lens is not stopped until the lens is at the correct position. The present invention can accurately control the positioning of the lens and ensures the correct scanning range of a multi-lens scanner by a closed loop control method. Even if the lens move many times, the scanning range can not be influenced by the precision variation of the mechanism. The present invention has high reliability.
Description
The present invention relates to a kind of position control method of multi-lens shift mechanism of scanner, be particularly related to a kind of control method that adopts the closed loop, when making the camera lens switching of different enlargement ratios, can be positioned at correct position whereby, so that the focal imaging that image can be correct.
In the design of current scanline device, except single-lens (lens) design that generally can read the certain size file, the many lens design that to read the different size file have been developed, as No. the 232398th, 235112,280480,296092, Taiwan patent gazette notification number etc., disclosed the invention of many relevant multi-lens optical devices aspect all.Yet, no matter above-mentioned what person, all be that the travel mechanism to camera lens or catoptron improves when switching at many camera lenses, its objective is and desire to make the different optical imagery input of size can cooperate camera lens or the catoptron that is positioned at the tram, drop on photo-electric conversion element more accurately, as charge coupled cell (Charge Couple Device, CCD) on, to obtain really and the scanning result of better quality.
For example, with reference to Fig. 1, it is " many camera lenses switching mechanism " of No. the 232398th, notification number, mainly is to utilize motor 12 transmission train of reduction gears 14, to drive the lens group 18 on the tooth bar 16, makes and switches different camera lenses, so different optical imagery resolution can be provided.Refer again to Fig. 2, it is the diagram of " the multi-lens optical scanner " of No. the 235112nd, notification number, mainly is to utilize a driving mechanism 22 to drive lens mounts 24 to move on slide rail 26, to switch different camera lenses, changes different optical imagery resolution.Or " optical devices of many camera lenses " of No. the 296092nd, notification number as shown in Figure 3, mainly be to utilize moving of catoptron 32, make the optical imagery of different files 34,36, can arrive CCD with different optical paths via camera lenses different in the lens group 38.
In sum, known control method to multi-lens shift mechanism is more an introduction, the person of emphasizing be that many camera lenses move or the improvement of switching mechanism.Develop the multi-lens optical device that at present, its control method generally is to adopt the mode of mechanical positioning, produces some anchor points in the mechanism that many camera lenses move, when many camera lenses utilize these anchor points that camera lens is placed the tram when switching is mobile.The mode of known a kind of anchor point includes a block or a location aware device, and after many camera lenses were subjected to a control signal to order about it produce to move, camera lens only just can stop running into block, and the position that stops promptly to be considered as the tram of camera lens.Yet this kind opened the control mode in loop, and can't learn whether camera lens is positioned at correct position as expection, must process and assembling by the machine-building of precision, otherwise just may produce inaccurate situation when camera lens running fix.But because of adopting the circuit controls method of opening of mechanical positioning, best position location still can be caused uncertain fundamentally.
Given this, the objective of the invention is the control method that many camera lenses that desire adopts a kind of closed loop move, can be positioned correct position more accurately when allowing camera lens move.
Purpose according to the invention described above, a kind of control method of multi-lens shift mechanism is provided, its conception mainly be by camera lens during moving, continue to read image with CCD corresponding to the linear sweep scope of original copy, for example originate as image with cylinder scale (calibration paper), and in image reads the district, make mark, when utilizing CCD to sense mark, judge with the location camera lens according to the certain rule that sets.The rule of judging is in respect of following three kinds:
One, absolute position method: the mark on a cylinder scale of scanner, obtaining also, record mark is a benchmark pixel position through a camera lens in the position that its correct image space images in photo-electric conversion element; Afterwards, camera lens moves to the direction of correct image space, and continues to obtain camera lens images in photo-electric conversion element in the shift position tense marker an instant location of pixels; At last, judging whether instant location of pixels is identical with the benchmark pixel position, if not, then gets back to the step that aforementioned camera lens moves, if then camera lens stops to move, and is to be positioned at correct image space.
Two, relative position method: two marks that in a cylinder scale of scanner, form corresponding two reference point, and obtain and write down two marks and image in location of pixels on the photo-electric conversion element and the difference between the location of pixels of two reference point in its correct image space through a camera lens; Afterwards, camera lens moves to the direction of correct image space, and continues to read to such an extent that two marks image in the location of pixels of photo-electric conversion element and the difference between the location of pixels of two reference point during in the shift position through camera lens; Whether at last, judge between difference identically, if not, then get back to the step that aforementioned camera lens moves, if then camera lens stops to move, and be to be positioned at correct image space.
Three, area method: in a cylinder scale of scanner, form two at a distance of being the mark of L, and to obtain and write down two marks be N through a camera lens in the position pixel difference that its correct image space images on the photo-electric conversion element
lAfterwards, camera lens moves to the direction of correct image space, and to continue to read two marks pixel difference through between the location of pixels at place after the lens focus be n
lAt last, judge N
lWhether be same as n
l, if not, then get back to the step that aforementioned camera lens moves, if then camera lens stops to move, and be to be positioned at correct image space.
In sum, the camera lens position is to return with signal to be subjected to allow camera lens move to the position of being wanted whereby with the moving of controls lens always, to guarantee that sweep limit is correct, even and the mobile number of times of camera lens is frequent, also can be not influenced because of the mechanism precision variation, so the reliability height.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with institute's accompanying drawing, be described in detail below.
Fig. 1 represents the diagram of known a kind of " many camera lenses switching mechanism ";
Fig. 2 represents the diagram of known another kind " multi-lens optical scanner ";
Fig. 3 represents the diagram of known another " optical devices of many camera lenses ";
Fig. 4 represents the control method of a kind of multi-lens shift mechanism in the absolute position mode of the present invention, shows on the cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element;
Fig. 5 represents the operation workflow figure with the control method of the multi-lens shift mechanism of absolute position mode;
Fig. 6 represents the control method of a kind of multi-lens shift mechanism in the relative position mode of the present invention, shows on the cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element;
Fig. 7 represents the operation workflow figure with the control method of the multi-lens shift mechanism of relative position mode;
Fig. 8 represents the control method of a kind of multi-lens shift mechanism in the area method mode of the present invention, shows on the cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element; And
Fig. 9 represents the operation workflow figure with the control method of the multi-lens shift mechanism of area method mode.
According to the closed loop control method of multi-lens shift mechanism of the present invention, can reach by following three kinds of modes: one, absolute position method:
With reference to Fig. 4, it shows on cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element.
Rule with its location of many lens control methods of the manner below will be described.
At first, the mark 44 that making one indicates on cylinder scale 42 for example is to form a full block of deceiving on complete white cylinder scale 42, is labeled as the color that has contrast with ambient color, also can be other marking mode certainly, as long as can using as difference.Owing to camera lens opens mobile direction of beginning is that decide the position when switching according to camera lens, suppose that camera lens is the right that is arranged in as the correct image space of figure, in the time of must the direction of arrow moves in figure, after if camera lens 46 moves to the tram of solid line among the figure, after will focusing on via camera lens 46, mark 44 falls within pixel (pixel) position of a certain correspondence on the photo-electric conversion element 48, photo-electric conversion element 48 has read mark 44 thus, will produce a for example high waveform that rises.Therefore, if can confirm that mark 44 is printed in the position on the cylinder scale 42,, corresponds to photo-electric conversion element 48 and images in N in correct position through camera lens in advance via editing
iOn the individual pixel, and note this N
iIndividual pixel is a benchmark pixel position, and as camera lens usefulness in the contrast of shift position when switching, whether the pixel of the camera lens imaging of judge mark through being positioned at the shift position is N
iIndividual pixel can determine whether camera lens has been positioned at correct position.So when camera lens is when being arranged in the shift position of figure dotted line, mark 44 is at n after camera lens 46 ' focusing of this moment
iProduce on the individual pixel as the high waveform that rises, after the control module contrast, judge n
i＞N
i, then camera lens 46 ' just can continue is driven that the direction (left) of arrow moves in the figure.On the contrary, when camera lens is the left side that is arranged in the correct image space of figure, when must be in figure moving with the arrow reverse direction, control module will be judged n
i＜N
iThe result, move toward the direction (to the right) opposite so just continue to drive camera lens with arrow.Yet, only judge at control module | n
i-N
i|＜n
ε(n
εBe a margin tolerance that allows) time, camera lens does not just remake any moving, and this moment, the position at camera lens place was correct position.
Refer again to Fig. 5, it is that this method comprises the following steps: according to the operation workflow figure of the control method of above-mentioned judgement multi-lens shift mechanism of the present invention that rule is summarized
A. in a linear sweep scope corresponding to original copy, a mark is set, for example in a complete white cylinder scale zone of A4 original copy, on a certain position, forms a complete black mark as middle position;
B. obtain the lens imaging of mark by being positioned at a tram in the location of pixels of a photo-electric conversion element, for example the position on CCD is N
iIndividual pixel;
C. the recording pixel position is a benchmark pixel position;
D. camera lens moves to the tram direction between mark and photo-electric conversion element;
E. obtain the lens imaging of mark by being positioned at a shift position in an instant location of pixels of photo-electric conversion element, for example the position on CCD is n
iIndividual pixel;
F. judge that whether instant location of pixels is same as the benchmark pixel position, for example judges whether | ni-N
i|＜n
ε, if not, then skip to steps d, if then carry out next step;
G. stop moving lens, and be to be positioned on the correct position.Two, relative position method:
With reference to Fig. 6, it shows on cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element.
Rule with its location of many lens control methods of the manner below will be described.
At first, equally for example on cylinder scale 42, make two marks 44,45 that indicate.Camera lens opens the direction of beginning when beginning towards switching and moves, suppose that camera lens is arranged in the right as the correct image space of figure equally, must move along the direction of arrow among the figure, after if camera lens 46 moves to the tram of solid line among the figure, fall within photo-electric conversion element 48 (as CCD) after mark 44,45 focuses on via camera lens 46 respectively and go up corresponding N
i, N
jIndividual location of pixels, photo-electric conversion element 48 has read mark 44,45 by this, has produced for example high waveform, and this N
i, N
jIndividual location of pixels is gone up selected corresponding pixel points with prior CCD, for example chooses CCD respectively and goes up first pixel and last location of pixels as correspondence, therebetween N
iAnd the pixel difference N between first pixel
fAnd N
jAnd the pixel difference N between last pixel
ROne specific relation is arranged, the mark 44,45 that is for example indicated on cylinder scale 42 respectively the distance apart from both sides be all L, so the N after the lens focus of correct image space
f=N
RAbove-mentioned data logging is got up, so when camera lens is when being arranged in the shift position of figure dotted line, mark 44 is at n after camera lens 46 ' focusing of this moment
iProduce on the individual pixel as the high waveform that rises, mark 44 is at n after camera lens 46 ' focusing of this moment
jProduce as the high waveform that rises n on the individual pixel
iDifference between pixel and first location of pixels is n
f, n
jDifference between pixel and last location of pixels is n
R, after contrast, judge n
f＞n
r, it is mobile that then camera lens 46 ' just can be continued to drive in the figure direction (left) of arrow.On the contrary, when camera lens is the left side that is arranged in the correct image space of figure, when must be in figure moving, will judge n with the arrow reverse direction
f＜n
rThe result, move toward the direction (to the right) opposite so just continue to drive camera lens with arrow.Yet, only judging | n
f-n
r|＜n
ε(n
εBe a margin tolerance that allows) time, camera lens does not just remake any moving, and this moment, the position at camera lens place was correct position.
Refer again to Fig. 7, it is that this method comprises the following steps: according to the operation workflow figure of the control method of above-mentioned judgement multi-lens shift mechanism of the present invention that rule is summarized
A. one corresponding to the linear sweep scope of original copy in corresponding one first reference point one first mark is set one second mark is set with corresponding one second reference point, for example in a complete white cylinder scale zone of A4 original copy with the cylinder scale two-end-point at a distance of for respectively forming a mark of deceiving entirely on the position of L;
B. obtain first, second mark and first, second reference point and divide other location of pixels by a lens imaging that is positioned at a tram in a photo-electric conversion element, for example the position on the CCD is respectively N
iWith N
jIndividual pixel;
C. the difference that writes down between first mark and the first reference point location of pixels is one first benchmark pixel, and the difference that writes down between second mark and the second reference point location of pixels is one second benchmark pixel, and for example first benchmark pixel is Nf, and second benchmark pixel is N
R, and N
f=N
R
D. camera lens moves to the tram direction between first, second mark and photo-electric conversion element;
E. obtain the lens imaging of first, second mark by being positioned at a shift position in photo-electric conversion element, one first of difference instant pixel and one second instant pixel between location of pixels respectively and between first, second reference point, for example the first instant pixel is n
f, the second instant pixel is n
R
F. judge that whether the first instant pixel and the second instant pixel are same as first benchmark pixel and second benchmark pixel respectively, for example judge whether | n
f-n
R|＜| N
f-N
R+ n
ε|, if not, then skip to steps d, if then carry out next step;
G. stop moving lens, and be to be positioned at correct position.Three, area method:
With reference to Fig. 8, it shows on cylinder scale that one is marked at when camera lens moves and the relation of waveform on the photo-electric conversion element.
Rule with its location of many lens control methods of the manner below will be described.
At first, equally for example on cylinder scale 42, make two marks 44,45 that indicate, and two indicate between marks at a distance of being L.Camera lens opens the direction of beginning when switching and moves, suppose that camera lens is arranged in the right as the correct image space of figure equally, must move along the direction of arrow among the figure, after if camera lens 46 moves to the tram of solid line among the figure, fall within photo-electric conversion element 48 (as CCD) after mark 44,45 focuses on via camera lens 46 respectively and go up corresponding N
i, N
jIndividual location of pixels, photo-electric conversion element 48 has read mark 44,45 thus, and produces for example high waveform and this N
i, N
jDifference between individual pixel is N
l, above-mentioned data logging is got up, so when camera lens is when being arranged in the shift position of figure dotted line, mark 44,45 is respectively at n after camera lens 46 ' focusing of this moment
i, n
jProduce on the individual pixel as the high waveform that rises, n at this moment
i, n
jDifference between individual pixel is n
l, after contrast, judge N
l＞n
l, it is mobile that then camera lens 46 ' just can be continued to drive in the figure direction (left) of arrow.On the contrary, when camera lens is the left side that is arranged in the correct image space of figure, when must be in figure moving, will judge N with the arrow reverse direction
l＞n
lThe result, move toward the direction (to the right) opposite so just continue to drive camera lens with arrow.Yet, only judging | N
l-n
l|＜n
ε(n
εBe a margin tolerance that allows) time, camera lens does not just remake any moving, and this moment, the position at camera lens place was the correct positioning position.
Refer again to Fig. 9, it is that this method comprises the following steps: according to the operation workflow figure of the control method of above-mentioned judgement multi-lens shift mechanism of the present invention that rule is summarized
A. in a linear sweep scope corresponding to original copy, one first mark and one second mark are set, for example in a complete white cylinder scale zone of A4 original copy certain two at a distance of for respectively forming a complete black mark on the position of L;
B. obtain first, second mark and divide other location of pixels by a lens imaging that is positioned at a tram in a photo-electric conversion element, for example the location of pixels on CCD is respectively N
iWith N
jIndividual pixel;
C. the difference that writes down location of pixels between first, second mark is a benchmark pixel, for example is N
l
D. camera lens moves to the tram direction between first, second mark and photo-electric conversion element;
E. obtaining an instant pixel of lens imaging difference between the pixel of photo-electric conversion element of first, second mark by being positioned at a shift position, for example is n
l
F. judge that whether instant pixel is same as benchmark pixel, for example judges whether | n
l-N
l|＜n
ε, if not, then skip to steps d, if then carry out next step;
G. stop to move this camera lens, and be to be positioned at correct position.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to qualification the present invention, those skilled in the art, without departing from the spirit and scope of the present invention; can do a little change and retouching, so protection scope of the present invention is as the criterion with the scope that claim was defined.
Claims (22)
1. the control method of a multi-lens shift mechanism comprises the following steps:
A. in a linear sweep scope corresponding to original copy, a mark is set;
B. obtain the lens imaging of this mark by being positioned at a tram in the location of pixels of a photo-electric conversion element;
C. writing down this location of pixels is a benchmark pixel position;
This camera lens is moved to this tram direction between this mark and this photo-electric conversion element;
E. obtain this mark this lens imaging by being positioned at a shift position in an instant location of pixels of this photo-electric conversion element;
F. judge whether this instant location of pixels is same as this benchmark pixel position, if not, then skips to steps d, if then carry out next step;
G. stop to move this camera lens.
2. the control method of multi-lens shift mechanism as claimed in claim 1, this benchmark pixel position is N among the wherein said step c
iIndividual pixel, this instant location of pixels is n among the described step e
iIndividual pixel, the judgement described in the then described step f should bases | n
i-N
i|＜n
εCarry out n
εIt is a tolerance value.
3. the control method of multi-lens shift mechanism as claimed in claim 1, wherein said mark is to place in the cylinder scale of this linear sweep scope.
4. the control method of multi-lens shift mechanism as claimed in claim 3, the mark described in the wherein said step a is the middle position that is positioned at this cylinder scale.
5. the control method of multi-lens shift mechanism as claimed in claim 3, the wherein said color that has contrast with ambient color that is labeled as.
6. the control method of multi-lens shift mechanism as claimed in claim 5, the wherein said full black area piece that in complete white this cylinder scale district, forms that is labeled as.
7. the control method of multi-lens shift mechanism as claimed in claim 1, wherein this photo-electric conversion element is a charge coupled cell (CCD).
8. the control method of a multi-lens shift mechanism comprises the following steps:
A. one corresponding to the linear sweep scope of original copy in corresponding one first reference point one first mark is set one second mark is set with corresponding one second reference point place;
B. obtain this first, second mark and this first, second reference point is divided other location of pixels by a lens imaging that is positioned at a tram in a photo-electric conversion element;
C. the difference that writes down between this first mark and this first reference point location of pixels is one first benchmark pixel, and the difference that writes down between this second mark and this second reference point location of pixels is second benchmark pixel;
This camera lens is moved to this tram direction between this first, second mark and this photo-electric conversion element;
E. obtain this first, second mark and be positioned at this photo-electric conversion element, one first of difference instant pixel and one second instant pixel between location of pixels respectively and between this first, second reference point by this lens imaging that is positioned at a shift position;
F. judge that whether this first instant pixel and this second instant pixel are same as this first benchmark pixel and this second benchmark pixel respectively, if not, then skip to steps d, if then carry out next step;
G. stop to move this camera lens.
9. the control method of multi-lens shift mechanism as claimed in claim 8, this first, second benchmark pixel is respectively N among the wherein said step c
f, N
R, this first, second instant pixel is respectively n among the described step e
f, n
R, basis for estimation is described in the then described step f | n
f-n
R|＜| N
f-N
R|+n
ε, n
εIt is a tolerance value.
10. the control method of multi-lens shift mechanism as claimed in claim 9, wherein N
f=N
R
11. the control method of multi-lens shift mechanism as claimed in claim 8, wherein this first, second mark is to place in the cylinder scale of this linear sweep scope.
12. the control method of multi-lens shift mechanism as claimed in claim 11, wherein this first, second reference point is respectively the two-end-point of this cylinder scale.
13. the control method of multi-lens shift mechanism as claimed in claim 11, wherein this is labeled as the color that has contrast with ambient color.
14. the control method of multi-lens shift mechanism as claimed in claim 13, wherein this first, second be labeled as a full black area piece that in complete white this cylinder scale district, forms.
15. the control method of multi-lens shift mechanism as claimed in claim 8, wherein this photo-electric conversion element is a charge coupled cell (CCD).
16. the control method of a multi-lens shift mechanism comprises the following steps:
A. in a linear sweep scope corresponding to original copy, one first mark and one second mark are set;
B. obtain this first, second mark and divide other location of pixels in a photo-electric conversion element by a lens imaging that is positioned at a tram;
C. the difference that writes down location of pixels between this first mark and this second mark is a benchmark pixel;
D. this camera lens moves to this tram direction between this first, second mark and this photo-electric conversion element;
E. obtain an instant pixel of this lens imaging difference between the pixel of this photo-electric conversion element of this first, second mark by being positioned at a shift position;
F. judge that whether this first instant pixel is same as this benchmark pixel, if not, then skips to steps d, if then carry out next step;
G. stop to move this camera lens.
17. the control method of multi-lens shift mechanism as claimed in claim 16, benchmark pixel is N among the wherein said step c
l, this instant pixel is respectively n among the step e
l, basis for estimation is described in the then described step f | n
l-N
l|＜n
ε, n
εIt is a tolerance value.
18. the control method of multi-lens shift mechanism as claimed in claim 16, wherein this first, second mark is to place in the cylinder scale of this linear sweep scope.
19. the control method of multi-lens shift mechanism as claimed in claim 18, wherein this first, second reference point is respectively the two-end-point of this cylinder scale.
20. the control method of multi-lens shift mechanism as claimed in claim 18, wherein this is labeled as the color that has contrast with ambient color.
21. the control method of multi-lens shift mechanism as claimed in claim 20, wherein this first, second be labeled as a full black area piece that in complete white this cylinder scale district, forms.
22. the control method of multi-lens shift mechanism as claimed in claim 16, wherein this photo-electric conversion element is a charge coupled cell (CCD).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98123486 CN1101564C (en) | 1998-10-29 | 1998-10-29 | Method for controlling multi-lens shift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98123486 CN1101564C (en) | 1998-10-29 | 1998-10-29 | Method for controlling multi-lens shift mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN1253317A CN1253317A (en) | 2000-05-17 |
| CN1101564C true CN1101564C (en) | 2003-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98123486 Expired - Fee Related CN1101564C (en) | 1998-10-29 | 1998-10-29 | Method for controlling multi-lens shift mechanism |
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|---|---|
| CN (1) | CN1101564C (en) |
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| CN1253317A (en) | 2000-05-17 |
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