CN1395216A - Optical scanning apparatus capable of automatically position-finding and with image fetch device - Google Patents
Optical scanning apparatus capable of automatically position-finding and with image fetch device Download PDFInfo
- Publication number
- CN1395216A CN1395216A CN 01119989 CN01119989A CN1395216A CN 1395216 A CN1395216 A CN 1395216A CN 01119989 CN01119989 CN 01119989 CN 01119989 A CN01119989 A CN 01119989A CN 1395216 A CN1395216 A CN 1395216A
- Authority
- CN
- China
- Prior art keywords
- image
- scanning
- document
- finding
- optical scanner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Image Input (AREA)
Abstract
The invention relates to the optical scanner of the image pick up device capable of automatic positioning. The driver unit is used to drive the first and second shifting units at same time iwht the speed ration 2:1 moving in the direction parallel to the document. There is the first reflector in the first shifting unit. There are the second and the third reflectors inthe second shifting unit. With the document being reflected through the three reflectors, the lens make the image of the document focus on the image scan system. A sensing mark is properly located between the second and the third reflectors. When the driver unit drives the second shifting unit, making the sensing mark enter into the light cone formed between the lens and the document, the image scan system senses the mark and deduces out the position of the position of the image pick up device.
Description
Technical field:
The invention relates to a kind of optical scanner, particularly relevant for a kind of optical scanner that can the automatically position-finding and with image fetch device position.
Background technology:
Optical scanner is a kind of photoelectricity transformation principle that utilizes, and the video conversion of sweep object is become the computer-related products of digital signal.Its scan mode mainly is to utilize scanning light source to be radiated on the scanning document, utilizes image-scanning system (for example CCD) scanning document image again, converts signal of video signal to digital signal by photoelectricity transformation principle more at last and exports computing machine to and handle.
Seeing also Figure 1A, is the synoptic diagram of known technology optical scanner.The manuscript loading plate 10 that comprises a transparent material, its top is to carry scanning document 11, its below then is provided with the image data that an image fetch device is used for reading file 11.
See also Figure 1B, this image fetch device is by a drive unit 12, one first mobile device 13, one second mobile device 14 and an image-scanning system 15 are formed, drive unit 12 is provided with a path of navigation 16 and a power source (not shown), this path of navigation 16 can be two to be parallel to the guide rail of scanning document 11, power source then is that a step motor can drive image fetch device and scans, above-mentioned first, second mobile device 13, the 14th, be located at the path of navigation 16 of drive unit 12 respectively, and the driving by step motor make its can be on path of navigation 16 equidirectional moving back and forth.Wherein first mobile device 13 is provided with one scan light source 17 and one first catoptron 18, second mobile device 14 is provided with second catoptron 19 and the 3rd catoptron 20, this scanning light source 17 can scan the image that places loading plate 10 top files 11, first catoptron 18 then can receive the image that file 11 is reflected, and penetrates towards the direction that is parallel to scanning document 11 (positive directions X); 19 of second catoptrons of second mobile device 14 are to be used for receiving first catoptron, 18 emitted document images also this image to be reflexed to the 3rd catoptron 20, after the 3rd catoptron 20 receives document image, can again this image be penetrated with the direction (negative directions X) that is parallel to scanning document 11, and emitted document image will converge on the image-scanning system 15 (for example CCD) by camera lens 21 at last, the style of writing of going forward side by side the reading of part image data.
For file 11 width that scanner scanned, the A4 width is 210mm, the A3 width is 297mm, but general employed image-scanning system 15 length of scanner usually at 40mm between the 60mm, therefore if the bigger document image of scope can be read fully by the less image-scanning system 15 of scope, the light path AB that it must be provided by above-mentioned three catoptrons 18,19,20 and camera lens 21 can be focused at document image (as shown in Figure 2) on the image-scanning system 15.Because the light path AB of scanner must keep certain, so the translational speed of first mobile device 13 is necessary for two times of second mobile device 14, and first mobile device 13 must be to move to the sweep stopping point position from scanning starting position when scanning, and second mobile device 14 must be to move to the sweep stopping point position from the scanning centre position, thus, first, second mobile device 13,14 just can arrive the sweep stopping point position at one time.
But the image fetch device of scanner is entering before scanning starting position formally scans; usually the action of the advanced line scanning correction of meeting; comprise the position; color saturation; shading value and direction are proofreaied and correct etc.; because these corrective actions must be to finish before image fetch device enters scanning starting position; therefore the scanning starting point of image fetch device must be the suitable distance before scanning starting position; after image fetch device begins to start and proofreaies and correct through the scanning of a segment distance from the position of scanning starting point, will arrive scanning starting position and formally file is scanned.
From the preceding paragraph explanation as can be known, image fetch device is wanted to carry out image scan, must allow the firmware of gated sweep instrument inside sense the position that image fetch device arrives the scanning starting point, can carry out image scan to file.Please consult Figure 1A again, Figure 1B, therefore the scanner of known technology mainly is that portion's front end is installed a sensor 22 near the position of starting point within it, this sensor 22 is made up of a transmitting terminal and a receiving end, first mobile device 13 is being provided with a washer 23 with sensor 22 corresponding positions again, when scanner when carrying out file 11 scanning, be to move to negative directions X by drive unit 12 control image fetch devices earlier, among the washer 23 insertion sensors 22 of first mobile device 13, and after the transmission of the signal between blocking-up transmitting terminal and the receiving end, just move and carry out the scanning corrective action to positive directions X, when first mobile device 13 arrives scanning starting position, just carry out formal file scan by drive unit 12 control image fetch devices.
But because known technology is the position of judging image fetch device with the washer of sensor sensing first mobile device, make the manufacturing cost of scanner improve, not only accuracy is low and judgement speed is slower to utilize sensor to judge image fetch device in addition, therefore how to invent a kind of position that does not need just can directly judge image fetch device by sensor, to reduce the accuracy of scanner manufacturing cost and raising position judgment, for being engaged in primary solving of the task of scanner manufacturing research staff.
Summary of the invention:
But fundamental purpose of the present invention is to provide a kind of optical scanner of automatically position-finding and with image fetch device, can not need just can judge by sensor the position of image fetch device, therefore can reduce the manufacturing cost of scanner.
But secondary objective of the present invention is to provide a kind of optical scanner of automatically position-finding and with image fetch device, can quicker, correctly judge the position of image fetch device, to obtain the higher optical scanner of quality.
But the optical scanner with automatically position-finding and with image fetch device of the present invention, comprise on the transparent carrier plate and can carry scanning document, the below then is provided with a drive unit and can drives image fetch device scanning document image, and this image fetch device comprises one first mobile device, one second mobile device, a camera lens and an image-scanning system.Wherein first mobile device be located at scanning starting position second mobile device then be located at scanning the centre position, and drive unit is to drive first, second mobile device simultaneously with two-to-one speed, with in the same way and the direction that is parallel to file carry out file scan.Be to be provided with first catoptron wherein in the first mobile device inside, in the second mobile device inside is to be provided with second and third catoptron, wherein first catoptron can penetrate document image with the direction that is parallel to scanning document, and through again document image being penetrated with the direction that is parallel to scanning document after second and third mirror reflects, the convergence of the last camera lens of process again images on the image-scanning system document image, to carry out reading of document image.
Wherein document image penetrates the scope that reflection through three catoptrons enters camera lens from file and is called " light cone ", but the translational speed of first mobile device and second mobile device is two-to-one during owing to scanning, therefore the shape of light cone will be kept necessarily, and the distance between first catoptron and lens remains unchanged, but the position of second, third catoptron then can change along with moving of second mobile device.Therefore the present invention mainly utilizes second catoptron (or the 3rd catoptron) in the position of light cone, with second mobile device at the locational mutual corresponding relation of path of navigation, certain position of image fetch device is inferred out.Its embodiment is on second catoptron (or the 3rd catoptron) surface one sensing mark to be set, when sensing mark enters light cone because drive unit drives image fetch device, image-scanning system can sense this sensing mark immediately, and the position correspondence by sensing mark goes out the position of image fetch device in path of navigation again.
Therefore, but the optical scanner of automatically position-finding and with image fetch device of the present invention, do not need to be provided with sensor and just can immediately the position judgment of image fetch device be come out, not only can reduce production costs and can be quicker, mode is judged the physical location of image fetch device more accurately.
Description of drawings:
Further understand and approval for your juror can be had purpose of the present invention, feature and effect, existing conjunction with figs. is described in detail as follows:
Figure 1A, Figure 1B are the synoptic diagram of known optical scanner;
Fig. 2 is the light path path profile of document image in image fetch device inside;
But Fig. 3 A, Fig. 3 B are the optical scanner synoptic diagram of automatically position-finding and with image fetch device of the present invention;
Fig. 4 is the light cone synoptic diagram of image fetch device of the present invention;
Fig. 5 is radiated at the intensity map of scanning document for linear light sorurce;
Fig. 6 A is for being provided with the synoptic diagram of sensing mark in second mirror surface;
Fig. 6 B is the intensity map of second mirror surface;
Fig. 7 is the scan method process flow diagram of optical scanner of the present invention.
Description of reference numerals:
10: loading plate 11: file
12: 13: the first mobile devices of drive unit
16: path of navigation 17: scanning light source
19: the second catoptrons of 18: the first catoptrons
Catoptron 21 in 20: the three: camera lens
22: sensor 23: washer
30: sensing mark
Concrete ten thousand formulas of implementing:
But the present invention is a kind of optical scanner of automatically position-finding and with image fetch device, mainly be the position of catoptron in light cone that utilizes image fetch device inside, judge the physical location of image fetch device in scanning pattern, its embodiment will be illustrated by following article.
See also Fig. 3 A, Fig. 3 B, but be the optical scanner synoptic diagram of automatically position-finding and with image fetch device of the present invention.Form by a manuscript loading plate 10a, a drive unit 12a and an image fetch device.This manuscript loading plate 10a is transparent material (for example glass or an acryl), and the top is provided with scanning document 11, and the below is provided with image fetch device, and carries out file 11 scannings by the driving of drive unit 12a.The path of navigation 16a that this drive unit 12a can provide image fetch device one to be parallel to scanning document 11, this path of navigation 16a comprises two parallel guide rail and step motor (not shown), and step motor is to do power source as drive unit 12a to be used for driving image fetch device and to scan.This image fetch device is to comprise one first mobile device 13a, one second mobile device 14a, a camera lens 21a and an image-scanning system 15a, since its structurally and scanning manner of execution all identical with known technology, therefore no longer this part is described, and adds that at components identical symbol rear " a " is to show difference.Wherein, the difference of maximum between optical scanner of the present invention and known technology is, the present invention does not need to be provided with the position that sensor and washer just can be judged image fetch device, and its embodiment is described as follows.
See also Fig. 4, be the light vertebra synoptic diagram of image fetch device.Earlier " light cone " this noun is defined at this, the light cone of indication refers to document image and is sent by file 11 belows in this article, arrives the distance of camera lens 21a after the reflection through first, second and the 3rd catoptron 18a, 19a, 20a.In the process of whole image scan, no matter the image fetch device shape that moves to any position light cone is kept necessarily all the time, but second, third catoptron 19a, 20a position in light cone but can change along with moving of the second mobile device 14a.With the second catoptron 19a is example, and in scanning process, position and second catoptron 19a in light cone the pairing position of the second mobile device 14a in path of navigation 12a all is unique (being man-to-man correspondence).In addition, also can calculate the position of the first mobile device 13a, so the present invention can come out for the position judgment of image fetch device by the position of the second catoptron 14a in light cone through calculating the back correspondence by the position of the second mobile device 14a.
See also Fig. 5, be the intensity map of linear light sorurce irradiation scanning document.This intensity map is also roughly the same through its shape after the reflection of catoptron.See also Fig. 6 A, at least one side surface (B` place) that the present invention is characterized in the second catoptron 19a is provided with a sensing mark 30, this sensing mark 30 must be in the formed Luminance Distribution of second catoptron 19a district scope, and its color is best (for example black) with non-sensitization color, when moving around among the path of navigation 16a of drive unit 12a driving image fetch device at scanner, the second catoptron 19a of the second mobile device 14a inside also can move around in light cone, when the sensing mark 30 1 of being located at B` enters in the scope of light cone, image-scanning system 15a can produce the brightness that senses this place immediately and produce obvious variation (shown in Fig. 6 B), and calculate the present place, position of the second catoptron 19a, further the position of the second mobile device 14a and the first mobile device 13a is calculated out simultaneously.
Therefore the present invention can calculate scanner needed correction distance before entering scanning starting position, and release the scanning starting point of scanner according to this correction distance, infer the image fetch device second catoptron 19a pairing position in light cone when this position at last again.Just sensing mark 30 can be located at the second catoptron 19a surface this moment and will enter the position of light cone scope just, thus, no matter any position of image fetch device on path of navigation 16a, as long as scanner one starts, drive unit 12a just drives image fetch device and moves to negative directions X (scanning starting point direction), when image-scanning system 15a senses sensing mark 30, represent that then image fetch device arrives the starting point of scanning, just can control image fetch device and turn to the line scanning correction work of going forward side by side this moment, after the scanning correction work is finished, image fetch device also arrives scanning starting position just, and scanner just can formally begin to enter the work that scanning area carries out document image scanning.
See also shown in Figure 7ly, be the scan method process flow diagram of optical scanner of the present invention.Its step comprises: at first drive reading device and move up to image-scanning system to negative directions X and sense sensing mark (71); Driving reading device again and move to the correction position of scanner to positive directions X, is to be provided with chequered with black and white correction plate (72) at this correction position place wherein; Pixel (pixel) gap of record sensing mark and correction position also is stored in (73) in the internal memory; Driving reading device enters scanning area and carries out image scan work (74); The driving reading device resets, and seeks scanning starting point (75) according to the pixel gap of step (73).
In sum, optical scanner of the present invention is owing to itself can pass through the position of sensing second catoptron in light cone, and then infer the position of image fetch device in path of navigation, its position judgment for image fetch device does not need the design by the sensor and the washer of similar known technology, therefore can reduce the manufacturing cost of scanner significantly.In addition, the present invention utilizes the position of sensing second catoptron in light cone, automatically the position of image fetch device is inferred out, and therefore the speed of its judgement and accuracy can improve the quality of scanning of optical scanner all than known technology height.The present invention also can be located at sensing mark on the 3rd catoptron again, and its principle and method all with to be located at second catoptron identical, are therefore no longer described.
Certainly; but above-described only is the embodiment of the optical scanner of automatically position-finding and with image fetch device of the present invention; it is not to be used for limiting practical range of the present invention; any people who is familiar with this technology all should belong to scope of the present invention in the modification of making without prejudice to spirit of the present invention, so protection scope of the present invention is foundation with claims.
Claims (10)
1. but the optical scanner of an automatically position-finding and with image fetch device is characterized by: comprising:
One drive unit is one to be parallel to the path of navigation of scanning document;
One first mobile device is to be located on this path of navigation and to be activated device to drive, and its inside is provided with first catoptron and can penetrates with the document image reflection and with the direction that is parallel to path of navigation;
One second mobile device, be to be located on this path of navigation and to be activated device with in the same way and be lower than first mobile device, one half rate and drive, its inside is provided with second and third catoptron can reflect the document image that first catoptron is transmitted, and once more document image is penetrated towards the direction that is parallel to path of navigation; And
One image-scanning system is to utilize the image that a camera lens is reflected the 3rd catoptron to converge on the image-scanning system to carry out document image scanning;
Wherein image fetch device formed taper sampling scope between camera lens and scanning document is " light cone ", and have at least a mirror surface to be provided with a sensing mark in the second mobile device inside, when sensing mark entered light cone because of moving of drive unit, this image-scanning system can be by the place, position of the sensing of this sensing mark being inferred image fetch device.
2. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1 is characterized by: this image fetch device is located at the below of a transparent manuscript loading plate, and places scanning document above this manuscript loading plate.
3. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1 is characterized by: the guiding device that this drive unit provided is two to be parallel to the guide rail of scanning document.
4. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1 is characterized by: this drive unit is to utilize the power source of a step motor as scanning.
5. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1 is characterized by: the light source when first mobile device also comprises a linear light sorurce as scanning document.
6. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1, it is characterized by: this sensing mark is provided in a side of on second catoptron of second mobile device.
7. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1, it is characterized by: this sensing mark is provided in a side of on the 3rd catoptron of second mobile device.
8. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1, it is characterized by: this image-scanning system is charge coupled cell (CCD).
9. but the optical scanner of automatically position-finding and with image fetch device as claimed in claim 1 is characterized by: this sensing mark moral sense light color.
10. the scan method of an optical scanner, it is characterized by: its step comprises:
A. at first driving reading device moves up to image-scanning system to scanning starting point direction and senses sensing mark;
B. drive reading device moves to correction position from scanner to the direction of scanning;
C. write down pixel (pixel) gap of sensing mark and correction position and be stored in the internal memory;
D. driving reading device again enters scanning area and carries out image scan work;
E. drive reading device and reset, and seek the scanning starting point according to the pixel gap of step (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01119989 CN1395216A (en) | 2001-07-06 | 2001-07-06 | Optical scanning apparatus capable of automatically position-finding and with image fetch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01119989 CN1395216A (en) | 2001-07-06 | 2001-07-06 | Optical scanning apparatus capable of automatically position-finding and with image fetch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1395216A true CN1395216A (en) | 2003-02-05 |
Family
ID=4663847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01119989 Pending CN1395216A (en) | 2001-07-06 | 2001-07-06 | Optical scanning apparatus capable of automatically position-finding and with image fetch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1395216A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324345C (en) * | 2003-03-06 | 2007-07-04 | 宇东科技股份有限公司 | Optical components with movable mirrors |
| CN101115112B (en) * | 2006-07-28 | 2011-06-15 | 佳能株式会社 | Image reading apparatus and method for controlling the same |
-
2001
- 2001-07-06 CN CN 01119989 patent/CN1395216A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324345C (en) * | 2003-03-06 | 2007-07-04 | 宇东科技股份有限公司 | Optical components with movable mirrors |
| CN101115112B (en) * | 2006-07-28 | 2011-06-15 | 佳能株式会社 | Image reading apparatus and method for controlling the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3821860B2 (en) | Image reading device | |
| US7755814B2 (en) | Image reading apparatus | |
| US7672027B2 (en) | Image reading apparatus | |
| US4864415A (en) | Slow scan registration self alignment system for raster input scanners | |
| JP4971598B2 (en) | LIGHTING DEVICE, IMAGE READING DEVICE, AND IMAGE READING METHOD | |
| EP1498840A3 (en) | Light beam control in an image exposure apparatus | |
| US20010030278A1 (en) | Image reading apparatus and illumination apparatus | |
| CN1194529C (en) | Image fetching system | |
| CN1395216A (en) | Optical scanning apparatus capable of automatically position-finding and with image fetch device | |
| CN1135829C (en) | Image scanning unit | |
| JP2004126284A (en) | Image reading unit and image reading device | |
| CN103581488B (en) | Scanning device and method | |
| JP3125522B2 (en) | Image reading device | |
| JPH01300760A (en) | Image reading device | |
| TW552796B (en) | Optical scanner capable of automatically positioning image reading device | |
| JP2000092289A (en) | Image reading apparatus and image reading method | |
| CN1284647A (en) | Scanning device with automatic identification of scanning object range and identification method thereof | |
| CN2701188Y (en) | Scanning module | |
| US8253993B2 (en) | Dual mirror illumination system for book copier | |
| JPH10200724A (en) | Picture reader | |
| JP2532395B2 (en) | Traction position detection device for document reading device | |
| JPH09266528A (en) | Image reader | |
| JP2003322915A (en) | Image reading device | |
| TW577221B (en) | Method for adjusting a reflector to its optimum position | |
| JPS63252063A (en) | Image reader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |