CN1410939A - Automatic paper delivery device and its focus depth adjusting method - Google Patents
Automatic paper delivery device and its focus depth adjusting method Download PDFInfo
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- CN1410939A CN1410939A CN 01131361 CN01131361A CN1410939A CN 1410939 A CN1410939 A CN 1410939A CN 01131361 CN01131361 CN 01131361 CN 01131361 A CN01131361 A CN 01131361A CN 1410939 A CN1410939 A CN 1410939A
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- document feeder
- automatic document
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Abstract
The equipment consists of the guide slot for feeding the file to be scanned, the scan window for the image-picking unit to pick up the image of the object to be scanned and the unit for adjusting the depth of field. The method includes following steps. (1) The auto-feeding unit with the adjustable depressive device is provided. (2) Feeding the pre-scanning object located between the adjustable depressive device and the scan window. (3) The depth of field is adjusted by use of the adjustable depressive device. (4) The pre-scanning object is scanned and its image is stored by use of the image-picking unit. (5) The image of the pre-scanning object is compared with the pre-stored image so as to determine the optimized height of the depth of field.
Description
(1) technical field:
The relevant a kind of automatic document feeder of the present invention is meant a kind of automatic document feeder and focus depth adjusting method thereof that is used for scanner especially.
(2) background technology:
Advance by leaps and bounds along with high-tech, microelectric technique also develops rapidly, so computing machine has penetrated with in each family and the enterprise, become indispensable electronic product in the modern life, because computer media is in vogue, need more peripheral product as input, output unit, this also is associated with optoelectronic semiconductor technology, particularly scanner has now become essential product in the computer peripheral apparatus.
Scanner mainly is to utilize a light supply apparatus to provide light source to shine a scanning object, utilize optical path device to receive the image of the scanning object that light supply apparatus reflected again when scanning, pick up the image of scanning object with charge coupled cell, conversion through photosignal, form digital signal, be sent at last and carry out the signal of video signal processing in the computing machine.
See also shown in Figure 1A and Figure 1B, it is the synoptic diagram of existing platform-type scanner.It mainly is that shell 11 upper surfaces at an optical scanner 1 are provided with an original copy bearing glass 12, to bear a scanning object 80, be provided with a power source group 13 in the shell 11, it connects a gearing 14, make the power of power source group 13 outputs to drive an image pickup unit 15 through gearing 14, make image pickup unit 15 in hollow shell 11, carry out linear movement, to pick up the signal of video signal of the scanning object 80 on the original copy bearing glass 12 along guide rod 16 directions.Image pickup unit 15 has 151, one light sources 152 of a hollow housing, and it is positioned an appropriate location, several reflecting optics 153 of housing 151 upper surfaces, a lens group 154 and a charge coupled cell 155; Send the light of directive scanning object 80 by light source 152, after reflection ray enters housing 151, by several reflecting optics 153 its reflection ray is reflected, after increasing optical path length to a suitable length, focus on and image on the charge coupled cell 155 through lens group 154, and the scan-image data are converted to electric signal.
See also shown in Fig. 2 A and Fig. 2 B scanister synoptic diagram of the automatic document feeder of the existing platform-type scanner of its expression.When platform-type scanner carries out paper feed type scanning, on platform-type scanner 1, carry an automatic document feeder 2, after image pickup unit 15 being moved to the scanning section of automatic document feeder 2, stabilized image pickup unit 15, automatic document feeder 2 is provided with a guide groove 21, the appropriate position of guide groove 21 offers a scanning form 22, the signal of video signal that scanning form 22 picks up by the scanning object 80 of guide groove 21 for image pickup unit 15, signal of video signal utilize light source 152 to produce after scanning object 80 reflections or transmission; Wherein, after reflection ray enters the housing 151 of image pickup unit 15, by several reflecting optics 153 with its reflection after, focus on through lens group 154, and image on the charge coupled cell 155, and the scan-image data are converted to electric signal.
See also shown in Fig. 3 A and Fig. 3 B, it is for inserting the side view of scanning object in the existing automatic document feeder, because automatic document feeder 2 is provided with guide groove 21, it has a suitable accommodation space, passes through for the scanning object 80 of various different-thickness.When with the thin scanning object 80a of feed-in roller 23 feed-ins when scanning form 22, when the depth of field height h ' of the scanning object 80b that thin scanning object 80a is thicker than feed-in with scanning the form 22 high h of a depth of field degree apart is long, can cause image pickup unit 15 (not shown) to pick up the error on the light path in the process of scanning object 80, and make that the image that images in the scanning object 80 on the charge coupled cell (not shown) is clear inadequately sometimes.
(3) summary of the invention:
Fundamental purpose of the present invention is to provide a kind of automatic document feeder of depth of field height-adjustable.
Another object of the present invention is to provide a kind of focus depth adjusting method that adapts to the automatic document feeder of different paperys.
For achieving the above object, the present invention takes following technical measures:
A kind of automatic document feeder of the present invention, it is provided with a guide groove that is used for feed-in file to be scanned, and the certain position of guide groove offers a scanning form that picks up the scanning object image for the image pickup unit; Also comprise a depth of field adjusting gear;
Depth of field adjusting gear comprises:
An adjustable pressure setting that is used to adjust depth of field height, it is arranged on the certain position of the corresponding scanning form of guide groove.
The focus depth adjusting method of a kind of automatic document feeder of the present invention comprises the following steps:
(a) provide a kind of automatic document feeder with adjustable pressure setting, this automatic document feeder has a guide groove putting scanning object, and this guide groove offers a scanning form, and adjustable pressure setting is positioned at the position of corresponding scanning form on the guide groove;
(b) prescan thing of feed-in is between described adjustable pressure setting and scanning form;
(c) adjust depth of field height with described adjustable pressure setting;
(d) utilize the image pickup unit that the prescan thing is scanned and store its signal of video signal;
(e) prescan thing image and is prestored image relatively, and determine a best depth of field height;
(f) the stationary adjustable pressure setting is to best depth of field height and position.
Compared with prior art, the present invention has following effect:
Said apparatus of the present invention and method can be adjusted the depth of field of automatic document feeder, being suitable for various different paperys, and can provide scan-image more clearly.
(4) description of drawings:
Figure 1A: the schematic perspective view of existing platform-type scanner.
Figure 1B: the side cutaway view of existing platform-type scanner.
Fig. 2 A: existing platform-type scanner is in conjunction with the schematic perspective view of the scanister of automatic document feeder.
Fig. 2 B: the side-looking diagrammatic cross-section of the scanister of existing platform-type scanner collocation automatic document feeder.
Fig. 3 A: existing automatic document feeder feed-in is the side cutaway view of thin scanning object.
Fig. 3 B: the side cutaway view of the scanning object that existing automatic document feeder feed-in is thicker.
Fig. 4 A, 4B: the embodiment synoptic diagram of the platform-type scanner configurations automatic document feeder of the present invention.
Fig. 5 A: the schematic side view of depth of field adjusting gear first embodiment in the automatic document feeder of the present invention.
Fig. 5 B: the schematic side view of depth of field adjusting gear second embodiment in the automatic document feeder of the present invention.
Fig. 5 C: the schematic side view of depth of field adjusting gear the 3rd embodiment in the automatic document feeder of the present invention.
Fig. 5 D: the schematic side view of depth of field adjusting gear the 4th embodiment in the automatic document feeder of the present invention.
Fig. 6: the embodiment synoptic diagram of the scanning object among the present invention.
Fig. 7: the process flow diagram of the focus depth adjusting method embodiment of automatic document feeder of the present invention.
(5) embodiment
Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present invention:
The present invention is characterized in, depth of field adjusting gear in this automatic document feeder is provided with an adjustable pressure setting of the appropriate location of corresponding scanning form with a guide groove, adjusts the depth of field height of scanning object by the scanning form to utilize adjustable pressure setting.
See also shown in Fig. 4 A and Fig. 4 B, it is the synoptic diagram of automatic document feeder embodiment of the present invention.Wherein, automatic document feeder 2 of the present invention is arranged on the platform-type scanner, automatic document feeder 2 is provided with a guide groove 21, the appropriate position of guide groove 21 offers a scanning form 22, and the appropriate position of guide groove 21 corresponding scanning forms 2 is provided with an adjustable pressure setting 3, when inserting a scanning object 80, guide groove 21 provides a feed-in roller 23 that scanning object 80 is screwed in, scanning object 80 is shifted along guide groove 21 when scanning form 22 places, utilize the adjustable pressure setting 3 light scanning objects 80 of pressing, make it when scanning form 22, depth of field height remains unchanged, during scanning, an image pickup unit 15 of scanner moved to the scanning section of automatic document feeder 2 after, stabilized image pickup unit 15.Image pickup unit 15 provides light source 152, and irradiation scanning object 80, after reflection or transmission, produce signal of video signal, after its reflection ray enters the housing 151 of image pickup unit 15, its reflection is folded to by several reflecting optics 53, behind lengthening optical path length to a suitable length, focus on and image on the charge coupled cell 155 through lens group 154, and the data of scan-image are converted to electric signal, feed out roller 24 with one again, scanning object 80 is screwed out, and release from guide groove 21.
Shown in Fig. 5 A to Fig. 5 D, it is the side view of the depth of field adjusting gear embodiment in the automatic document feeder of the present invention, and wherein, adjustable pressure setting 3 includes: power source 31, a gear unit 32 and an adjustment unit 33.Among the embodiment of Fig. 5 A and Fig. 5 B, power source 31 comprises a motor 311, it is for outputting power, and motor 311 can provide the power that feeds out roller 24 simultaneously, so gear unit 32 is that interlock is in feeding out roller 24, and gear unit 32 comprises a driving belt 321, so that power is suitably transmitted, adjustment unit 33 cooperates driving belt 321, can be a cam 331 or an eccentric wheel 332, the power of driving belt 321 transferring power sources, 31 outputs, can drive cam 331 or eccentric wheel 332 generation rotations, form the angle position of various corresponding different lengths, to change depth of field height h, therefore, the depth of field height h in the time of can adjusting scanning object 80 by scanning form 22.
Another embodiment of the present invention, shown in Fig. 5 C, power source 31 is for providing a motor 311a of power separately, and positive and negative two-way rotation can be provided, and in the foregoing description is to utilize to feed out roller 24 interlocks and be different from, and in the present embodiment, gear unit 32 includes a gear set 322, and adjustment unit 33 mate gear groups 322 become a tooth bar 333, the power of gear set 322 transferring power sources, 31 outputs, can drive tooth bar 333 and produce linear displacement, to change depth of field height h.An embodiment more of the present invention, shown in Fig. 5 D, wherein, gear unit 32 includes a connection rod set 323, adjustment unit 33 coupler link groups 323 are designed to a slide block 334, the power of connection rod set 323 transferring power sources 31 output is converted to the linear displacement of slide block 334 with swing offset, to change depth of field height h.Certainly, above adjustment unit 33 all can be changed mutually with gear unit 32, and the distortion of this type of device can be understood conversion enforcement by above-mentioned explanation, so do not add to give unnecessary details at this.
When scanning, to be scanned 80 thickness of feed-in can influence depth of field height h, cause image pickup unit 15 to pick up path-length error in the process of scanning object 80, therefore, before scanning, can insert a prescan thing 81 with scanning object 80 same thickness earlier,, carry out scanning again scanning object 80 with position adjustable according to prescan thing 81 stationary adjustable pressure settings 3.
As shown in Figure 6, it is the synoptic diagram that is used for prescan thing 81 of the present invention.Wherein, prescan thing 81 is one and proofreaies and correct original text, this correction original text is provided with to provide and picks up a pattern 82 judging signal, pattern 82 can be chequered with black and white candy strip, it can be designed to and the be parallel to each other candy strip of (or vertical) of a feed-in direction 83, and certainly, pattern 82 can be located at the feed-in front end central part of prescan thing 81, also can be located at other positions, as long as when 81 feed-ins of prescan thing, can pick up the image of pattern 82 for image pickup unit (not shown).
See also shown in Figure 7ly, it is the process flow diagram of the focus depth adjusting method embodiment of automatic document feeder of the present invention.The focus depth adjusting method of automatic document feeder of the present invention comprises the following steps:
Step 51: the automatic document feeder that is provided with an adjustable pressure setting is provided, this automatic document feeder is provided with a guide groove, the one scan form that provides an image pickup unit to carry out image pickup is provided this guide groove, and adjustable pressure setting is positioned on the guide groove of corresponding scanning form.
Step 52: because will scan the time, need the prescan thing of one of first feed-in and scanning object same thickness, make the prescan thing can scan between form and the adjustable pressure setting along its guide groove feed-in, wherein, the prescan thing is a correction original text, and this correction original text is provided with the pattern that the chequered with black and white candy strip that picks up judgement can be provided.
Step 53: the depth of field height h when changing the prescan thing by the scanning form with adjustable pressure setting adjustment.
Step 54: utilize the image pickup unit to pick up the image of this prescan thing, the image pickup unit is the pattern image that picks up on the prescan thing, afterwards, is stored after will being converted to electric signal through the data of the scanning prescan thing image of image pickup cell processing again.
Step 55: the image and the image that prestores of prescan thing are compared, can compare out and the most approximate prescan thing image data of image that prestores, to determine a best depth of field height.
Step 56: adjust adjustable pressure setting and be positioned at the best depth of field height of prescan thing by the scanning form, stationary adjustable pressure setting.If when being judged as non-best depth of field height and position, then repeat this step 53 to step 55.
Step 57: will scan the thing back-out to feed out roller again, and release from this guide groove, and, afterwards, can carry out the scanning of the scanning object of same thickness to feed out the prescan thing.
Foregoing is to utilize embodiment that technical characterictic of the present invention is described, is not to be used to limit protection scope of the present invention, even there is the people to change slightly on the basis of the present invention's design, must belong in protection scope of the present invention.
Claims (8)
1, a kind of automatic document feeder, it is provided with a guide groove that is used for feed-in file to be scanned, and the certain position of guide groove offers a scanning form that picks up the scanning object image for the image pickup unit; It is characterized in that, also comprise a depth of field adjusting gear;
Depth of field adjusting gear comprises:
An adjustable pressure setting that is used to adjust depth of field height, it is arranged on the certain position of the corresponding scanning form of guide groove.
According to the described automatic document feeder of claim 1, it is characterized in that 2, described adjustable pressure setting comprises:
One can be for the power source of outputting power;
But the gear unit of a transfer motion power, it is connected with power source;
An adjustment unit, it is connected with gear unit, adjusts described depth of field height with the displacement that utilizes this adjustment unit.
3, according to the described automatic document feeder of claim 2, it is characterized in that:
Described power source is a motor;
Described gear unit is a driving belt;
Described adjustment unit is an eccentric wheel that is driven by driving belt.
4, a kind of focus depth adjusting method that is suitable for the automatic document feeder of claim 1～3 comprises the following steps:
(a) provide a kind of automatic document feeder with adjustable pressure setting, this automatic document feeder has a guide groove putting scanning object, and this guide groove offers a scanning form, and adjustable pressure setting is positioned at the position of corresponding scanning form on the guide groove;
(b) prescan thing identical with scanning object thickness of feed-in places between described adjustable pressure setting and the scanning form;
(c) adjust depth of field height with adjustable pressure setting;
(d) utilize the image pickup unit that the prescan thing is scanned and store its signal of video signal;
(e) prescan thing image and is prestored image relatively, and determine a best depth of field height;
(f) the stationary adjustable pressure setting is to best depth of field height and position.
5, the focus depth adjusting method of automatic document feeder according to claim 4 is characterized in that, described prescan thing is a correction original text, and this correction original text is provided with can be for picking up the pattern of judgement.
6, the focus depth adjusting method of automatic document feeder according to claim 5 is characterized in that, described pattern is chequered with black and white candy strip.
7, the focus depth adjusting method of automatic document feeder according to claim 5 is characterized in that, in the described step (d), the signal of video signal that the image pickup unit picks up and stores is the pattern image on the described prescan thing.
According to the focus depth adjusting method of the described automatic document feeder of claim 4, it is characterized in that 8, described step (f) also comprises the steps: afterwards
(g) feed out this prescan thing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131361 CN1410939A (en) | 2001-09-28 | 2001-09-28 | Automatic paper delivery device and its focus depth adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131361 CN1410939A (en) | 2001-09-28 | 2001-09-28 | Automatic paper delivery device and its focus depth adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN1410939A true CN1410939A (en) | 2003-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01131361 Pending CN1410939A (en) | 2001-09-28 | 2001-09-28 | Automatic paper delivery device and its focus depth adjusting method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413304C (en) * | 2005-05-09 | 2008-08-20 | 光宝科技股份有限公司 | Adjustable scanning device and regulating method thereof |
| CN101316308B (en) * | 2007-05-31 | 2010-04-21 | 虹光精密工业（苏州）有限公司 | Scanning device with file pressing component |
| CN104359409B (en) * | 2014-11-27 | 2017-02-22 | 上海电力学院 | Optics-based high-precision displacement sensor |
-
2001
- 2001-09-28 CN CN 01131361 patent/CN1410939A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413304C (en) * | 2005-05-09 | 2008-08-20 | 光宝科技股份有限公司 | Adjustable scanning device and regulating method thereof |
| CN101316308B (en) * | 2007-05-31 | 2010-04-21 | 虹光精密工业（苏州）有限公司 | Scanning device with file pressing component |
| CN104359409B (en) * | 2014-11-27 | 2017-02-22 | 上海电力学院 | Optics-based high-precision displacement sensor |
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