CN107122695B - Image scanning equipment - Google Patents
Image scanning equipment Download PDFInfo
- Publication number
- CN107122695B CN107122695B CN201710458709.XA CN201710458709A CN107122695B CN 107122695 B CN107122695 B CN 107122695B CN 201710458709 A CN201710458709 A CN 201710458709A CN 107122695 B CN107122695 B CN 107122695B
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- Prior art keywords
- light
- imaging device
- protective lens
- light supplementing
- image scanning
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- 238000003384 imaging method Methods 0.000 claims abstract description 70
- 230000001502 supplementing effect Effects 0.000 claims abstract description 56
- 230000001681 protective effect Effects 0.000 claims abstract description 54
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 230000004907 flux Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K2007/10524—Hand-held scanners
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microscoopes, Condenser (AREA)
Abstract
The embodiment of the invention provides image scanning equipment, which comprises a light supplementing device, an imaging device and a protective lens; the optical axes of the light supplementing device and the imaging device are parallel to each other, and the optical axes of the protective lens and the light supplementing device are oblique and incline towards the imaging device. By applying the technical scheme provided by the embodiment of the invention, the interference of the light beams of the light supplementing device and the imaging device can be reduced, so that the imaging definition of the imaging device can be improved.
Description
Technical Field
The invention relates to the technical field of optics, in particular to image scanning equipment.
Background
Image scanning devices, such as scanning guns, are commonly used to acquire image information such as bar codes on items.
The existing image scanning equipment mainly comprises a shell, a light supplementing device, an imaging device and a protective lens.
Wherein, light filling device and image device set up in the casing, and, light filling device and image device's optical axis are parallel to each other. The shell is provided with a shooting port, the imaging device acquires image information on the object through the shooting port and transmits the image information to background equipment such as a computer, the background equipment is used for processing, and the light supplementing device supplements light for external objects through the shooting port so as to improve the definition of the image information acquired by the imaging device. The protection lens is fixedly connected with the shell and used for shielding the shooting opening, and the protection lens is perpendicular to the optical axes of the light supplementing device and the imaging device.
In practical application, it is found that: after the light emitted by the light supplementing device irradiates the protective lens, a part of the light penetrates through the protective lens to form a light field for supplementing light to the object, a part of the light passes through the protective lens to generate reflected light, and many of the generated reflected light can be emitted into the imaging device to interfere with shooting light beams of the imaging device, so that the image information shot by the image scanning equipment is blurred.
In view of this, those skilled in the art are required to improve the structure of the image scanning apparatus to solve the technical problem that the resolution of the captured image information is poor due to the interference of the light beams of the light supplementing device and the imaging device.
Disclosure of Invention
An object of an embodiment of the present invention is to provide an image scanning apparatus to improve imaging definition. The specific technical scheme is as follows:
an image scanning apparatus provided by an embodiment of the present invention includes: a light supplementing device, an imaging device and a protective lens;
the optical axes of the light supplementing device and the imaging device are parallel to each other, and the protective lens is oblique to the optical axis of the light supplementing device and inclined towards the imaging device.
Optionally, the angle of the oblique intersection of the protective lens and the optical axis of the light supplementing device is 60-90 degrees.
Optionally, the angle of the oblique intersection of the protective lens and the optical axis of the light supplementing device is 70-80 degrees.
Optionally, the image scanning device further comprises an aiming device for forming an aiming light field through the protective lens.
Optionally, the optical axis of the collimation device and the optical axis of the imaging device are parallel.
Optionally, the image scanning device further comprises a housing;
the light supplementing device, the imaging device and the collimating device are positioned in the shell;
the shell is provided with a shooting opening, and the protective lens is fixedly connected with the shell and used for shielding the shooting opening.
The image scanning equipment provided by the embodiment of the invention comprises a light supplementing device, an imaging device and a protective lens; the optical axes of the light supplementing device and the imaging device are parallel to each other, and the optical axes of the protective lens and the light supplementing device are oblique and incline towards the imaging device. When the protective lens is tilted, the incidence angle of the light beam on the side of the optical axis of the light-compensating field close to the imaging device to the protective lens is reduced with respect to the case where the protective lens is perpendicular to the optical axis of the imaging device. Because the protective lens is inclined to the imaging device, the protective lens can reflect light rays with larger luminous flux to one side of the imaging device, which is close to the light supplementing device, and light rays with smaller luminous flux to the imaging device. Overall, the luminous flux of the light entering the imaging device is reduced, that is, the interference of the light beams of the light supplementing device and the imaging device is reduced, so that the imaging definition of the imaging device can be improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a first configuration of an image scanning apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the front view of the embodiment of FIG. 1;
FIG. 3 is a schematic view showing the distribution of reflected light rays when the protective lens is in the first state and the second state;
fig. 4 is a schematic diagram of a second structure of an image scanning apparatus according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to be able to improve the imaging definition of an image scanning apparatus, an embodiment of the present invention provides an image scanning apparatus, and a specific embodiment will be described below with reference to fig. 1.
Referring to fig. 1, fig. 1 is a schematic diagram of a first structure of an image scanning apparatus according to an embodiment of the present invention, including: a light supplementing device 1, an imaging device 2 and a protective lens 3;
wherein, the optical axes of the light supplementing device 1 and the imaging device 2 are parallel to each other, and the protective lens 3 is inclined with the optical axis of the light supplementing device 1 and is inclined towards the imaging device 2.
In a specific application, the light supplementing device 1 may include a light emitting source and a light supplementing optical lens, where the light emitting source forms the light supplementing light field 4 through the light supplementing optical lens, and the shapes of the light emitting source and the light supplementing optical lens are not limited in particular.
As shown in fig. 2, fig. 2 is a schematic diagram of a front view structure of the embodiment shown in fig. 1, in which the optical axis OO' of the light compensating device 1 is the optical axis of the light compensating field 4, and the vector line segment is shown in the figureIs a vertical line segment, vector line segment +.>On the side of the protective lens 3 close to the imaging device 2 along the vector line segment +.>Vector direction, vector line segment->The distance from the point(s) of (3) to the protective lens (3) gradually decreases, e.g. L1>L2>L3。
With the embodiment shown in fig. 1, when the protective lens 3 is tilted, the incidence angle of the light beam on the side of the optical axis of the light supplementing device 1 near the imaging device 2 to the protective lens 3 is reduced with respect to the case where the protective lens 3 is perpendicular to the optical axis of the imaging device 2. Since the protective lens 3 is inclined to the imaging device 2, the protective lens 3 reflects light with larger luminous flux to the side of the imaging device 2 close to the light supplementing device 1, and reflects light with smaller luminous flux to the imaging device 2. The luminous flux of the light entering the imaging device 2 is reduced as a whole, so that interference of the light beams of both the light supplementing device 1 and the imaging device 2 is reduced, and the imaging definition of the imaging device 2 can be improved.
The specific analysis includes: for convenience of analysis, the first state described below is a state in which the protective lens 3 is perpendicular to the optical axis of the imaging device 2, and the second state is a state in which the protective lens 3 is oblique to the optical axis of the imaging device 2 and faces the imaging device 2.
The light beam emitted from the light compensating device 1 may be a parallel light beam, a converging light beam, or a diverging light beam, but in general, in order to make light compensation possible, it is generally used that the light beam emitted from the light compensating device 1 is a diverging light beam. When the outgoing light beam of the light supplementing device 1 employed is a divergent light beam, the light outgoing characteristics of the light supplementing device 1 include: the light-compensating field formed by the light-compensating device 1 irradiates a plane perpendicular to the optical axis, and the light flux decreases as the distance from the central axis in the radial direction increases with respect to the optical axis of the light-compensating device 1 for two irradiation regions of the same size. The reflected light rays entering the imaging device are mainly formed by reflecting light rays, which are close to one side of the imaging device, of the optical axis in the light supplementing field.
Referring to fig. 3, fig. 3 is a schematic view showing the distribution of reflected light in the first state and the second state of the protective lens; in the light beams emitted from the light supplementing device 1, the light between OA and OA 'is irradiated onto the protective lens 3 in the first state, and the light between OA and OB is reflected to the imaging device 2, OA' and OB and is irradiated onto the protective lens 3 in the first state, and the light is reflected to the side of the imaging device 2 away from the light supplementing device 1. The incidence angles of the light rays between OA and OA ' and the light rays between OA ' and OB reaching the protective lens 3 are reduced in the second state relative to the first state, so that in the second state, the light rays between OA and OA ' are irradiated onto the protective lens 3, and the light rays between OA ' and OB are reflected to the side of the imaging device 2 near the light supplementing device 1, and the light rays between OA ' and OB are irradiated onto the protective lens 3, and the light rays are reflected to the imaging device 2.
Further, due to the light emitting characteristic of the light supplementing device 1 and the principle that the light rays propagate along a straight line, the luminous flux of the light rays between OA and OA 'irradiated onto the protective lens 3 is larger than the luminous flux of the light rays between OA' and OB irradiated onto the protective lens 3 under the condition that the irradiation areas are the same in the first state or the second state. In this way, in the second state, the luminous flux of the light finally entering the imaging device 2 is reduced, so that the interference of the light beams of the light supplementing device 1 and the imaging device 2 is reduced, and the imaging definition of the imaging device 2 can be improved.
In one implementation of the embodiment of the present invention, with continued reference to fig. 3, the angle θ at which the protective lens 3 is oblique to the optical axis of the light supplementing device 1 is 60 ° to 90 °. Further, the angle θ at which the protective lens 3 is inclined to the optical axis of the light supplementing device 1 is 70 to 80 °. By the arrangement, not only can the luminous flux of the reflected light generated at the protective lens 3 entering the imaging device 2 be effectively reduced, but also the direction of the light beam of the light supplementing device 1 penetrating the protective lens 3 and the direction of the refracted light of the external object to be shot penetrating the protective lens 3 can be considered, so that the imaging device 2 can image clearly.
Referring to fig. 4, fig. 4 is a schematic diagram of a second structure of an image scanning apparatus according to an embodiment of the present invention, where the image scanning apparatus may further include an collimating device 5, and the collimating device 5 is configured to form a collimating light field 6 through the protective lens 3. The setting of the sighting device 5 enables the shot object to be accurately positioned during shooting, and quick and effective shooting is achieved.
With continued reference to fig. 4, the optical axis of the registration device 5 is parallel to the optical axis of the imaging device 2, and the precision of registration positioning can be improved.
In one implementation of the embodiment of the present invention, the image scanning apparatus may further include a housing; the light supplementing device 1, the imaging device 2 and the collimating device 5 are positioned in the shell; the shell is provided with a shooting opening, and the protective lens 3 is fixedly connected with the shell and is used for shielding the shooting opening. In the embodiment of the invention, the shape and the size of the shell are not particularly limited, the imaging device 2 acquires the image information on the object through the shooting opening, and the light supplementing device 1 supplements light for the external object through the shooting opening so as to improve the definition of the image information acquired by the imaging device 2. The protective lens 3 is fixedly connected with the shell and used for shielding a shooting opening, and the protective lens 3 is perpendicular to the optical axes of the light supplementing device 1 and the imaging device 2.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (4)
1. An image scanning apparatus, comprising: a light supplementing device, an imaging device and a protective lens;
wherein, the optical axes of the light supplementing device and the imaging device are parallel to each other, and the protective lens is oblique to the optical axis of the light supplementing device and is inclined towards the imaging device;
the light supplementing device comprises: the light source and the light supplementing optical lens form a light supplementing light field through the light supplementing optical lens;
the apparatus further comprises an aiming device for forming an aiming light field through the protective lens;
the optical axis of the collimating means is parallel to the optical axis of the imaging means.
2. The image scanning apparatus according to claim 1, wherein the angle of the protective lens oblique to the optical axis of the light supplementing device is 60 to 90 °.
3. The image scanning apparatus according to claim 2, wherein the angle of the protective lens oblique to the optical axis of the light supplementing device is 70-80 °.
4. The image scanning apparatus as claimed in claim 1, further comprising a housing;
the light supplementing device, the imaging device and the collimating device are positioned in the shell;
the shell is provided with a shooting opening, and the protective lens is fixedly connected with the shell and used for shielding the shooting opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458709.XA CN107122695B (en) | 2017-06-16 | 2017-06-16 | Image scanning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458709.XA CN107122695B (en) | 2017-06-16 | 2017-06-16 | Image scanning equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107122695A CN107122695A (en) | 2017-09-01 |
| CN107122695B true CN107122695B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710458709.XA Active CN107122695B (en) | 2017-06-16 | 2017-06-16 | Image scanning equipment |
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