CN110913090A - Image scanning device - Google Patents
Image scanning device Download PDFInfo
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- CN110913090A CN110913090A CN201911204649.4A CN201911204649A CN110913090A CN 110913090 A CN110913090 A CN 110913090A CN 201911204649 A CN201911204649 A CN 201911204649A CN 110913090 A CN110913090 A CN 110913090A
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- scanning device
- image scanning
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- photoelectric conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Heads (AREA)
Abstract
The application provides an image scanning device, which includes: the lens assembly comprises a plurality of lenses which are sequentially arranged along a scanning direction, and the scanning direction is the length direction of the target object; compared with a plurality of area array cameras in the prior art, the distance between the photoelectric conversion chip and the lens in the first preset direction can be smaller, so that the reduction multiple of the scanned image does not need to be increased, the connection between any two adjacent imaging areas can also be ensured, namely the device ensures that the resolution of the scanned image is higher while realizing seamless scanning.
Description
Technical Field
The present invention relates to a sensor technology, and more particularly, to an image scanning apparatus.
Background
The conventional area array image scanning device scans an image in a size smaller than that of an original document. The scanning device can realize long-scale scanning by arranging the cameras side by side. However, the existing cameras have too large volume, and the distance between two or more cameras is too far, so that the reduction times of objects become very large to ensure seamless scanning, and high-resolution scanning cannot be realized. The cameras are close to each other, and although the reduction multiple of the object is small, the object can be scanned at high resolution, but because of the volume limit of the cameras, the cameras cannot be infinitely close to each other, and seamless scanning cannot be achieved. Therefore, a high resolution seamless scanning device is needed.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The main objective of the present application is to provide an image scanning device to solve the problem that the image scanning device in the prior art is difficult to realize seamless scanning on the basis of ensuring the resolution.
In order to achieve the above object, according to one aspect of the present application, there is provided an image scanning apparatus comprising: the lens assembly comprises a plurality of lenses which are sequentially arranged along a scanning direction, wherein the scanning direction is the length direction of the target object; the photoelectric conversion chip and the lens component are arranged at intervals in a first preset direction, a plurality of imaging areas of the image scanning device in the scanning direction are arranged, the number of the imaging areas is the same as that of the lenses, any two adjacent imaging areas are at least connected, and the first preset direction is the extending direction of the optical axes of the lenses.
Further, a projection of the photoelectric conversion chip on a predetermined plane is inside a projection of the lens assembly on the predetermined plane, the predetermined plane being perpendicular to the first predetermined direction and parallel to the scanning direction.
Further, the distances between any two lenses and the photoelectric conversion chip are equal.
Further, any two of the lenses are the same lens.
Further, the image scanning device further includes a light source, the light source is located on a side of the lens away from the photoelectric conversion chip, and in a second predetermined direction, the light source is located on a side of the lens assembly, and the second predetermined direction is perpendicular to the first predetermined direction and the scanning direction, respectively.
Further, there are two of the light sources, and in the second predetermined direction, one of the light sources is located on one side of the lens assembly, and the other light source is located on the other side of the lens assembly.
Further, a length of the light source in the scanning direction is greater than a length of the lens assembly in the scanning direction.
Furthermore, the image scanning device further comprises a frame body, the frame body is provided with an accommodating cavity, and the plurality of lenses, the photoelectric conversion chip and the light source are all located in the accommodating cavity.
Furthermore, the image scanning device also comprises a circuit board, the circuit board is positioned in the accommodating cavity, and the photoelectric conversion chip is arranged on the surface of the circuit board and positioned between the circuit board and the lens.
Further, the image scanning device further comprises a socket, and the socket is electrically connected with the light source and the circuit board respectively.
By applying the technical scheme of the application, the image scanning device comprises the lens component and the photoelectric conversion chip, a plurality of imaging areas of the image scanning device in the scanning direction are provided, the number of the imaging areas is the same as that of the lenses, and parts of any two adjacent imaging areas are connected, so that the image scanning device realizes seamless scanning. In addition, in the image scanning device, the distance between any two adjacent lenses is not limited, that is, the two lenses can be infinitely close to each other in the scanning direction, even contact or partially overlap each other, compared with a plurality of area-array cameras in the prior art, the distance between the photoelectric conversion chip and the lens in the first predetermined direction can be smaller, so that the reduction multiple of the scanned image does not need to be increased, and at least connection between any two adjacent imaging areas can be ensured, that is, the device ensures higher resolution of the scanned image while realizing seamless scanning.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a side view of an image scanning device according to an embodiment of the invention; and
fig. 2 shows a front view of an image scanning apparatus according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a frame body; 20. a lens assembly; 21. a first lens; 22. a second lens; 23. a third lens; 24. a fourth lens; 30. a circuit board; 40. a photoelectric conversion chip; 50. a light source; 60. a socket; 70. a target object; 71. a first imaging region; 72. a second imaging region; 73. a third imaging region; 74. a fourth imaging region; 712. a first overlap region; 723. a second overlapping area; 734. a third overlapping area.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background, it is difficult for the image scanning apparatus in the prior art to achieve seamless scanning while ensuring the resolution, and in order to solve the above technical problem, the present application proposes an image scanning apparatus.
Fig. 1 and 2 are schematic structural views of an image scanning apparatus according to an embodiment of the present invention, the image scanning apparatus including:
a lens unit 20 including a plurality of lenses arranged in sequence along a scanning direction, the scanning direction being a longitudinal direction of the target object 70;
and a photoelectric conversion chip 40 disposed opposite to the lens assembly 20 at a distance in a first predetermined direction, wherein the image scanning device has a plurality of imaging regions in the scanning direction, the number of the imaging regions is equal to the number of the lenses, and portions of two adjacent imaging regions are connected, and the first predetermined direction is an extending direction of optical axes of the plurality of lenses.
The image scanning device comprises a lens assembly and a photoelectric conversion chip, wherein a plurality of imaging areas are arranged on the image scanning device in the scanning direction, the number of the imaging areas is the same as that of the lenses, and parts of any two adjacent imaging areas are connected, so that the image scanning device realizes seamless scanning. In addition, in the image scanning device, the distance between any two adjacent lenses is not limited, that is, the two lenses can be infinitely close to each other in the scanning direction, even contact or partially overlap each other, compared with a plurality of area-array cameras in the prior art, the distance between the photoelectric conversion chip and the lens in the first predetermined direction can be smaller, so that the reduction multiple of the scanned image does not need to be increased, and at least connection between any two adjacent imaging areas can be ensured, that is, the device ensures higher resolution of the scanned image while realizing seamless scanning.
It should be noted that, at least two cases are included in the connection of any two adjacent imaging regions, in the first case, any two adjacent imaging regions are partially overlapped, and in the second case, any two adjacent imaging regions are connected, and in both cases, there is no gap between any two adjacent imaging regions.
In a specific embodiment of the present application, as shown in fig. 1, the lens assembly 20 includes a first lens 21, a second lens 22, a third lens 23, and a fourth lens 24, the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24 are sequentially arranged in a scanning direction, the lenses correspond to imaging regions one by one, imaging regions corresponding to any adjacent lenses are partially overlapped, an imaging region corresponding to the first lens 21 is a first imaging region 71, an imaging region corresponding to the second lens 22 is a second imaging region 72, an imaging region corresponding to the third lens 23 is a third imaging region 73, an imaging region corresponding to the fourth lens 24 is a fourth imaging region 74, an overlapping region between the first imaging region 71 and the second imaging region 72 is a first overlapping region 712, an overlapping region between the second imaging region 72 and the third imaging region 73 is a second overlapping region 723, the overlapping area of the third imaging area 73 and the fourth imaging area 74 is a third overlapping area 734.
In an embodiment of the present application, as shown in fig. 2, a projection of the photoelectric conversion chip 40 on a predetermined plane is inside a projection of the lens assembly 20 on the predetermined plane, and the predetermined plane is perpendicular to the predetermined direction and parallel to the scanning direction. The structure can ensure that the photoelectric conversion chip receives the reflected light of the target object through the corresponding lens, and further ensure that any two adjacent imaging areas are at least connected, thereby realizing seamless scanning.
In an embodiment of the present application, as shown in fig. 1, distances between any two of the lenses and the photoelectric conversion chip 40 are equal, for example, a distance between the first lens 21 and the photoelectric conversion chip 40 is equal to a distance between the second lens 22 and the photoelectric conversion chip 40, so that reduction multiples of the scanned images corresponding to the lenses are the same, and the scanned images corresponding to the lenses are conveniently integrated into a complete image.
In an embodiment of the present application, as shown in fig. 1, a connection line of optical centers of any two adjacent lenses is parallel to the predetermined plane, so as to simplify an arrangement manner of the lenses, so that the image scanning apparatus has a simple structure and is convenient to maintain and replace.
In an embodiment of the present application, any two of the lenses are the same lens, i.e. the size, shape and material parameters are the same. And the same lens is adopted for image scanning, so that the resolution of the scanned image corresponding to each lens is the same, and the subsequent image processing is facilitated.
In this case, a person skilled in the art adjusts the distance between the lens and the photoelectric conversion chip according to actual conditions so that the resolution of image scanning of each photoelectric conversion chip is the same.
In an embodiment of the present application, as shown in fig. 1 and fig. 2, the image scanning apparatus further includes a light source 50, light emitted by the light source 50 is irradiated on a target object 70, reflected light of the target object 70 is received by the photoelectric conversion chip 40 after passing through the lens assembly 20, the light source 50 is located on a side of the lens away from the photoelectric conversion chip 40, and the light source 50 is located on a side of the lens assembly 20 in a second predetermined direction, the second predetermined direction is perpendicular to the first predetermined direction and the scanning direction, respectively, so as to prevent the light source 50 from blocking the reflected light of the target object 70, so that the reflected light of the target object 70 can be irradiated on the photoelectric conversion chip 40 through the lens assembly 20 without obstruction, and thus accuracy of a scanning result can be further ensured.
In one embodiment of the present application, as shown in fig. 2, there are two light sources 50, and in the second predetermined direction, one light source 50 is located on one side of the lens assembly 20, and the other light source 50 is located on the other side of the lens assembly 20, so that the light emitted from the plurality of light sources 50 is uniformly irradiated on the target object 70, thereby ensuring that the brightness of each part of the scanned image is the same.
In an embodiment of the present application, as shown in fig. 1 and fig. 2, a length of the light source 50 in the scanning direction is greater than a length of the lens assembly 20 in the scanning direction, so as to avoid that light emitted by the light source cannot irradiate an imaging area corresponding to an edge lens, which results in that the edge lens cannot scan to obtain a corresponding scanned image, and further ensure that seamless scanning is achieved.
In an embodiment of the present application, as shown in fig. 1 and 2, the image scanning apparatus further includes a frame 10, the frame 10 has an accommodating cavity, and the plurality of lenses, the photoelectric conversion chip 40, and the light source 50 are all located in the accommodating cavity. Compared with the prior art that one camera corresponds to one frame body, the camera has the advantages that the distance limit among the lenses is broken, and seamless scanning is further realized on the basis of ensuring the resolution.
In an embodiment of the present application, as shown in fig. 1 and 2, the image scanning apparatus further includes a circuit board 30, the circuit board 30 is located in the accommodating cavity, and the photoelectric conversion chip 40 is disposed on a surface of the circuit board 30 and between the circuit board 30 and the lens. In the structure, the photoelectric conversion chip is integrated on the circuit board, so that uniform power supply is facilitated, and the structure of the image scanning device is simplified.
In order to control the operations of the photoelectric conversion chip and the light source, in an embodiment of the present application, as shown in fig. 1 and 2, the image scanning apparatus further includes a socket 60, and the socket 60 is electrically connected to the light source 50 and the circuit board 30 and is used for supplying power to the photoelectric conversion chip 40 and the light source 50.
Specifically, the socket is powered on, so that the photoelectric conversion chip and the light source start to operate, that is, the image scanning device starts image scanning, light emitted by the light source uniformly irradiates on a target object, the photoelectric conversion chip receives reflected light of the target object through a lens and converts an optical signal into an electrical signal, and the electrical signal is processed to obtain a scanned image of the target object.
In an embodiment of the present application, the image scanning apparatus further includes a signal processor electrically connected to the photoelectric converter, for constructing a scanned image of the target object according to the electrical signal output by the photoelectric converter. Specifically, the photoelectric converter is connected to the signal processor through a socket, converts the received reflected light signal of the target object into an electrical signal, and transmits the electrical signal to the signal processor through a cable via the socket, and the signal processor constructs a scanned image of the target object according to the electrical signal.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
the image scanning device comprises a lens assembly and a photoelectric conversion chip, wherein a plurality of imaging areas are arranged on the image scanning device in the scanning direction, the number of the imaging areas is the same as that of the lenses, and parts of any two adjacent imaging areas are connected, so that the image scanning device realizes seamless scanning. In addition, in the image scanning device, the distance between any two adjacent lenses is not limited, that is, the two lenses can be infinitely close to each other in the scanning direction, even contact or partially overlap each other, compared with a plurality of area-array cameras in the prior art, the distance between the photoelectric conversion chip and the lens in the first predetermined direction can be smaller, so that the reduction multiple of the scanned image does not need to be increased, and at least connection between any two adjacent imaging areas can be ensured, that is, the device ensures higher resolution of the scanned image while realizing seamless scanning.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An image scanning device, characterized by comprising:
the lens assembly comprises a plurality of lenses which are sequentially arranged along a scanning direction, wherein the scanning direction is the length direction of the target object;
the photoelectric conversion chip and the lens component are arranged at intervals in a first preset direction, a plurality of imaging areas of the image scanning device in the scanning direction are arranged, the number of the imaging areas is the same as that of the lenses, any two adjacent imaging areas are at least connected, and the first preset direction is the extending direction of the optical axes of the lenses.
2. The image scanning device according to claim 1, wherein a projection of the photoelectric conversion chip on a predetermined plane is inside a projection of the lens assembly on the predetermined plane, the predetermined plane being perpendicular to the first predetermined direction and parallel to the scanning direction.
3. The image scanning device according to claim 2, wherein the distances between any two of the lenses and the photoelectric conversion chips are equal.
4. An image scanning device according to claim 3, wherein any two of said lenses are the same lens.
5. The image scanning device according to claim 2, further comprising a light source located on a side of the lens away from the photoelectric conversion chip and located on a side of the lens assembly in a second predetermined direction, the second predetermined direction being perpendicular to the first predetermined direction and the scanning direction, respectively.
6. An image scanning device according to claim 5, wherein there are two of said light sources, one of said light sources being located on one side of said lens assembly and the other of said light sources being located on the other side of said lens assembly in said second predetermined orientation.
7. An image scanning device according to claim 5, wherein the length of the light source in the scanning direction is greater than the length of the lens assembly in the scanning direction.
8. The image scanning device according to claim 7, further comprising a frame body having an accommodating chamber, wherein the plurality of lenses, the photoelectric conversion chip, and the light source are located in the accommodating chamber.
9. The image scanning device according to claim 8, further comprising a wiring board located in the accommodation chamber, the photoelectric conversion chip being disposed on a surface of the wiring board between the wiring board and the lens.
10. The image scanning device of claim 9, further comprising a socket electrically connected to the light source and the wiring board, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204649.4A CN110913090A (en) | 2019-11-29 | 2019-11-29 | Image scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204649.4A CN110913090A (en) | 2019-11-29 | 2019-11-29 | Image scanning device |
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| Publication Number | Publication Date |
|---|---|
| CN110913090A true CN110913090A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911204649.4A Pending CN110913090A (en) | 2019-11-29 | 2019-11-29 | Image scanning device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103427A1 (en) * | 2019-11-29 | 2021-06-03 | 威海华菱光电股份有限公司 | Image scanning system |
| CN115629076A (en) * | 2022-09-27 | 2023-01-20 | 威海华菱光电股份有限公司 | Array type image detection device |
-
2019
- 2019-11-29 CN CN201911204649.4A patent/CN110913090A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103427A1 (en) * | 2019-11-29 | 2021-06-03 | 威海华菱光电股份有限公司 | Image scanning system |
| CN115629076A (en) * | 2022-09-27 | 2023-01-20 | 威海华菱光电股份有限公司 | Array type image detection device |
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