CN202631917U - Imaging lighting device and optical identification device - Google Patents
Imaging lighting device and optical identification device Download PDFInfo
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- CN202631917U CN202631917U CN201220126288.3U CN201220126288U CN202631917U CN 202631917 U CN202631917 U CN 202631917U CN 201220126288 U CN201220126288 U CN 201220126288U CN 202631917 U CN202631917 U CN 202631917U
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Abstract
The utility model relates to an imaging lighting device, comprises a light source (4), a uniform light plate (2), and a light pipe (3). A lamp holder of the light source (4) is embedded into the uniform light plate (2). The light pipe (3) is disposed on a side of the uniform light plate (2). The uniform light plate (2) is used to homogenize light given out by the light source (4). The light pipe (3) is used to guide the uniform light to an imaging surface (6). The utility model also relates to an optical identification device, comprises a housing (5), an imaging module (1) disposed in the housing (5), and the imaging lighting device disposed in the housing. The imaging module (1) is used to obtain an optical image of the imaging surface (6) from a landscape window. The light pipe (3) of the imaging lighting device is facing the landscape window, and provides lighting of the imaging surface (6) for the imaging module (1). The utility model can realize uniform illumination on an object plane with a relatively large area and prevent a highlight part of a high reflectance surface from forming hot spots and solar flares in an imaging process.
Description
Technical field
The utility model relates to lighting engineering, relates in particular to a kind of imaging lighting device and optical identification equipment.
Background technology
Along with science and technology development; Can realize that data recorded information on the various media is carried out digitized data to be read; These data messages are set at dielectric surface with the form of optical imagery usually, and the user need carry out reading of optical image information through the optical identification equipment of special use.
Electronic pen is a kind of common optical identification equipment with less viewfinder range, and as shown in Figure 1, this electronic pen has the shell 2a of interior section hollow; Shell 2a separated into two parts; A part is held camera head 7a, and this camera head 7a comprises camera lens 6a and image sensor 8a, and another part is tapered; In the cavity 3a of this tapering part, accommodate viewfinder window 1a; Taper also be provided with light source 4a on the top, the light 5a that this light source 4a launches can form illumination to dielectric surface, carry out reading of optical image information to make things convenient for camera head 7a.This tapering part by under the center also be provided with the cylindrical chambers of the heart, can play the light that light source 4a is sent and carry out the effect of diffusion homogenising.
For the employing of medium, can use common paper usually, but some more senior papers also occur; For example art paper, gold and silver paperboard, aluminium-foil paper, viscose paper etc. equally also can be provided with data, but for the electronic pen that Fig. 1 introduced, its viewfinder range is smaller; The image information that reads is more limited, can only realize even than the illumination of small size, and if simply enlarge viewfinder window; Then be difficult to realize that larger area illumination is even; The paper that has the high reflectance surface so then may produce speck and solar flare owing to the uneven irradiation of light source, have influence on normally reading of optical image information, and then cause the deviation of data parsing.
The utility model content
The purpose of the utility model is to propose a kind of imaging lighting device and optical identification equipment, can realize that larger area object plane illumination is even, avoids the high light part on high reflectance surface in imaging process, to form speck and solar flare.
For realizing above-mentioned purpose; The utility model provides a kind of imaging lighting device; Comprise: light source (4), even tabula rasa (2) and light pipe (3), at least one lamp holder of said light source (4) embeds said even tabula rasa (2), and said light pipe (3) is arranged on a side of said even tabula rasa (2); Said even tabula rasa (2) is used for light uniformization that said light source (4) is sent, and said light pipe (3) is used for the light of said even tabula rasa (2) homogenising is directed to imaging surface (6).
Further; Said even tabula rasa (2) comprises reflector plate (205), LGP (206) and diffusion sheet (207); The lamp holder of said light source (4) is embedded in the said LGP (206); With respect to said LGP (206); Said reflector plate (205) is close to setting with said LGP (206) on away from the direction of said imaging surface (6), be used for the light of said LGP (206) diffusion is reflexed in the said LGP (206) again, and said diffusion sheet (207) is close to setting with said LGP (206) on the direction of closing on said imaging surface (6); And said diffusion sheet (207) and said light pipe (3) adjacency are used for the light scattering that said LGP (206) is interior and are transmitted to said light pipe (3).
Further, the edge of said LGP (206) is provided with at least one outshot, and this outshot is provided with light source mounting hole (201), is used to embed the lamp holder of said light source (4).
Further, the one side at least of said LGP (206) is provided with and is a plurality of scattering points (202) that optical pattern is arranged.
Further, the side at said LGP (206) is provided with encapsulation reflectance coating (204).
Further, also be provided with imaging hole (203) on the said LGP (206).
Further, said light pipe (3) is the tubular light gatherer, and the shape of said light pipe (3) one ends is consistent with the shape of the even tabula rasa (2) that closes on, and the shape of said light pipe (4) other end is consistent with the shape of viewfinder window.
Further, the inwall (302) of said light pipe (3) is provided with mirror face reflection coating or diffuse reflection coating.
In technique scheme; Light source is not directly imaging surface to be shone; But be embedded in the even tabula rasa through the lamp holder with light source, the light uniformization that utilizes even tabula rasa that light source is sent utilizes light pipe that the light of homogenising is directed to imaging surface again; Accomplish the even illumination of imaging surface, can avoid the generation of speck and solar flare for the imaging surface that reflectivity is high, area is big.
In the utility model embodiment; Said even tabula rasa (2) comprises reflector plate (205), LGP (206) and diffusion sheet (207); The lamp holder of said light source (4) is embedded in the said LGP (206); With respect to said LGP (206); Said reflector plate (205) is close to setting with said LGP (206) on away from the direction of said imaging surface (6), be used for the light of said LGP (206) diffusion is reflexed in the said LGP (206) again, and said diffusion sheet (207) is close to setting with said LGP (206) on the direction of closing on said imaging surface (6); And said diffusion sheet (207) and said light pipe (3) adjacency are used for the light scattering that said LGP (206) is interior and are transmitted to said light pipe (3).
By reflector plate, LGP, diffusion sheet is range upon range of and in the even tabula rasa that forms; Light source is launched light through the lamp holder that embeds in the LGP; This light can spread in LGP; Utilize diffusion sheet that the light in the LGP is carried out scattering and is transmitted to imaging surface, reflector plate then can make light import LGP, improves the utilization factor of light.
In the utility model embodiment, the edge of said LGP (206) is provided with at least one outshot, and this outshot is provided with light source mounting hole (201), is used to embed the lamp holder of said light source (4).Outshot at the edge of LGP embeds lamp holder, can avoid forming at imaging surface the reflection image of the hot spot of light source, also is convenient to the installation of light source in addition.
In the utility model embodiment, the one side at least of said LGP (206) is provided with and is a plurality of scattering points (202) that optical pattern is arranged.The scattering point that is the optical pattern layout is set on LGP can the light that be mapped to scattering point be diffuseed to form scattered light to all angles.
In the utility model embodiment, be provided with encapsulation reflectance coating (204) at the side of said LGP (206).The encapsulation reflectance coating can make the light in the LGP can not overflow from side, improves the light utilization efficiency of light source.
In the utility model embodiment, also be provided with imaging hole (203) on the said LGP (206).By the separated situation of LGP, can make imaging modules can get access to the optical imagery of imaging surface for imaging modules and imaging surface through imaging hole is set on LGP.
In the utility model embodiment, said light pipe (3) is the tubular light gatherer, and the shape of said light pipe (3) one ends is consistent with the shape of the even tabula rasa (2) that closes on, and the shape of said light pipe (4) other end is consistent with the shape of viewfinder window.Light pipe can be collected viewfinder window with the light of sparing the tabula rasa homogenising; Avoid the light of even tabula rasa institute outgoing to be diffused into the loss that light is caused in other places; And LGP has certain arrangement effect to the distribution of light; Form the hot spot of the shape that is fit to viewfinder window, the hollow structure of light pipe can also be guaranteed the uniform light of imaging surface reflected back smoothly through light pipe, and the camera lens of entering imaging modules is carried out to picture.
In the utility model embodiment, the inwall (302) of said light pipe (3) is provided with mirror face reflection coating or diffuse reflection coating.Adopt mirror face reflection coating or diffuse reflection coating further to make and enter into the interior light of light pipe, make the light that shines viewfinder window more even by repeatedly reflection.
For realizing above-mentioned purpose, the utility model provides a kind of optical identification equipment, comprising:
Shell (5) with viewfinder window,
Be arranged on the imaging modules (1) in the shell (5), be used for obtaining the optical imagery of imaging surface (6) from said viewfinder window;
Be arranged on the aforementioned arbitrary imaging lighting device in the shell (5), the light pipe of said imaging lighting device (3) is relative with said viewfinder window, and for said imaging modules (1) illumination of said imaging surface (6) is provided.
Further, also be provided with imaging hole (203) on the LGP of said imaging lighting device (206), the center of said imaging hole (203) is consistent with the entrance pupil center (102) of the camera lens (103) of said imaging modules (1).
Based on technique scheme; The utility model imaging lighting device can be arranged on the inside of optical identification equipment; Light pipe is directed to viewfinder window with the light of homogenising, and imaging surface is thrown light on, and imaging modules can be obtained the optical imagery of imaging surface; Utilize the illumination of the light of homogenising can realize that larger area object plane illumination is even, avoid the high light part on high reflectance surface in imaging process, to form speck and solar flare.
In the utility model embodiment, through imaging hole is set, and consistent mode is arranged to the entrance pupil center of camera lens in the center of imaging hole, make camera lens can better receive the uniform light of object plane reflected back.
Above-mentioned each embodiment of the utility model imaging lighting device can be widely used in all kinds of optical identification equipment.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the inner structure synoptic diagram of electronic pen in the prior art.
Fig. 2 is the structural representation of an embodiment of the utility model optical identification equipment.
Fig. 3 a-3b is the front view and the upward view of the concrete structure of imaging modules among Fig. 2 embodiment.
Fig. 4 a-4c is front view, vertical view and the left view of even tabula rasa among the utility model imaging lighting device embodiment.
Fig. 5 a-5b is the front view and the vertical view of light pipe among the utility model imaging lighting device embodiment.
Description of reference numerals: 1, imaging modules; 2, even tabula rasa; 3, light pipe; 4, light source; 5, shell; 6, imaging surface; 101, printed circuit board (PCB) (pcb board); 102, the entrance pupil center of camera lens; 103, camera lens; 104, camera lens base; 105, light source solder joint; 106, imageing sensor (for example CMOS chip, CCD chip etc.); 201, light source mounting hole; 202, scattering point; 203, imaging hole; 204, encapsulation reflectance coating; 205, reflector plate; 206, LGP; 207, diffusion sheet; 301, receiving plane; 302, the inwall of light pipe; 303, exit facet.
Embodiment
Through accompanying drawing and embodiment, the technical scheme of the utility model is done further detailed description below.
For optical identification equipment; On height reflection object plane, to obtain the larger area illumination; Need be in the expansion of carrying out on the structure of optical identification equipment on horizontal and vertical, but after the enlarged areas, then bring the problem of speck and solar flare easily because of the unevenness of illumination; Based on such technical matters, the utility model describes through the embodiment that Fig. 2 has provided a kind of optical identification equipment.
In the embodiment of Fig. 2, optical identification equipment comprises at least: shell 5, imaging modules 1 and imaging lighting device.Have viewfinder window on the shell 5, conveniently be arranged on shell 5 interior imaging modules 1 are obtained imaging surface 6 from viewfinder window optical imagery.The imaging lighting device is set in the shell 5, is provided as the illumination of image surface 6 for imaging modules 1.
The concrete structure of imaging modules is referring to Fig. 3 a-3b, and imaging modules comprises printed circuit board (PCB) 101 (pcb board), camera lens base 104, camera lens 103 and imageing sensor 106 (for example CMOS chip or CCD chip) at least.Printed circuit board (PCB) 101 is stuck on the inwall of shell 5; On printed circuit board (PCB) 101, also be fixed with camera lens base 104; On camera lens base 104, be provided with camera lens 103, on printed circuit board (PCB) 101, also be provided with at least one light source solder joint 105, this solder joint is realized being electrically connected between power supply and the light source 4.The center of camera lens 3 is the entrance pupil center 102 of camera lens 3 in Fig. 3 b.Imageing sensor 106 is the image inductor chips that are used for carrying out opto-electronic conversion.
Imaging modules is not defined as structure shown in Fig. 3 a-3b and corresponding assembly, and other imaging modules of the prior art are applicable to the optical identification equipment of the utility model too, for example adopt the imaging modules of CCD chip etc.
In the utility model embodiment; The imaging lighting device constitutes (referring to Fig. 2) by light source 4, even tabula rasa 2 and LGP 3 at least; Wherein at least one lamp holder of light source 4 embeds even tabula rasa 2; Light pipe 3 is arranged on a side of even tabula rasa 2, and even tabula rasa 2 is used for light uniformization that light source 4 is sent, and light pipe 3 is used for the light of even tabula rasa 2 homogenising is directed to imaging surface 6.Light source 4 can adopt various visible light sources (for example red light source etc.) or non-visible light source (for example infrared light supply etc.).According to the difference of the lamp holder of light source 4, light source 4 can be point-like, wire or block light source.
Be different from the mode that light source 4 of the prior art directly throws light on to imaging plane; The utility model imaging lighting device embodiment is embedded in the even tabula rasa through the lamp holder with light source; The light uniformization that utilizes even tabula rasa that light source is sent; Utilize light pipe that the light of homogenising is directed to imaging surface again, accomplished the even illumination of imaging surface, can avoid the generation of speck and solar flare for the imaging surface that reflectivity is high, area is big.
Shown in Fig. 4 a-4c, be front view, vertical view and the left view of even tabula rasa among the utility model imaging lighting device embodiment.Even tabula rasa 2 comprises reflector plate 205, LGP 206 and diffusion sheet 207, and the lamp holder of light source 4 is embedded in the LGP 206.Preferably; At the edge of LGP 206 at least one outshot is set; Be two outshots among Fig. 4 b, be provided with light source mounting hole 201, be used to embed the lamp holder of light source 4 at outshot; This embedded mode and structure can avoid forming at imaging surface the reflection image of the hot spot of light source, and be also more convenient installing of light source in addition.
LGP 206 is plates that the inner height of a smooth surface passes through; Light through the time can reduce the loss of light; In order to realize better light diffusion effect, can be arranged to a plurality of scattering points 202 that optical pattern is arranged in the one side (preferably closing on the one side of reflector plate 205) at least of LGP 206.Can diffuse to form scattered light to all angles when these scattering points are mapped to by light, handle thereby light is further carried out homogenising.The size of scattering point 202, density can be different and different apart from the distance of light source according to its position.Diffusion sheet is the lamellar body of a transmit light, its inside particle that some can scattered beam that can mix so that with the light scatter of transmission to all angles.
The light that light source is launched can repeatedly scattering between reflector plate and diffusion sheet, reflection realizes the homogenising of light, and the horizontal area of LGP corresponding size can be set according to the area needs of viewfinder window, obtains hoping the uniform light spots of the size that obtains.
At the side of LGP 206 encapsulation reflectance coating 204 can also be set, overflow from the side of LGP 206, thereby further improve the utilization factor of light to prevent light.
In various optical identification apparatus embodiments; Some imaging modules and viewfinder window are at the homonymy of even tabula rasa; And some imaging modules and viewfinder window like this for the imaging needs of imaging modules, can be offered imaging hole 203 respectively in the both sides of even tabula rasa on LGP 206.The camera lens front end of imaging modules is placed imaging hole 203 places, the center of imaging hole 203 is arranged to consistent, so just can better receive the light of object plane institute reflected back with the entrance pupil center 102 of the camera lens 103 of imaging modules.The pore size of imaging hole 203 can be according to the decision of factors such as the focal length of imaging demand and camera lens, visual angle.
Shown in Fig. 5 a-5b, be the front view and the vertical view of light pipe among the utility model imaging lighting device embodiment.Light pipe 3 can have hollow structure for the tubular light gatherer, and the shape of light pipe 3 one ends (being receiving plane 301) is consistent with the shape of the even tabula rasa 2 that closes on, and the shape of light pipe 3 other ends (being exit facet 303) is consistent with the shape of viewfinder window.Light pipe 3 has the collecting action of light, and the light of sparing tabula rasa 2 outgoing is brought to viewfinder window, and does not terminate in the loss that is diffused into other places and causes light.The distribution of 3 pairs of light of light pipe also has certain arrangement effect, can therefore can adjust the light spot shape in the viewfinder window through the shape and size that change exit facet 303 according to demand according to the shape and size of the shape adjustments hot spot of exit facet 303.For example foursquare hot spot just can obtain through foursquare exit facet 303 is set.
The hollow structure of light pipe can also be guaranteed the uniform light of imaging surface reflected back smoothly through light pipe, and the camera lens of entering imaging modules is carried out to picture.
In addition, also be provided with mirror face reflection coating or diffuse reflection coating on the inwall 302 of light pipe 3.Adopt mirror face reflection coating or diffuse reflection coating further to make and enter into the interior light of light pipe, make the light that shines viewfinder window more even by repeatedly reflection.
The embodiment of the above-mentioned imaging lighting device of the utility model introduction can be widely used in various optical identification equipment, especially for large-scale optical identification equipment good imaging lighting environment is provided.
Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to preferred embodiment the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can make amendment to the embodiment of the utility model perhaps is equal to replacement to the part technical characterictic; And not breaking away from the spirit of the utility model technical scheme, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (10)
1. imaging lighting device; It is characterized in that; Comprise: light source (4), even tabula rasa (2) and light pipe (3), at least one lamp holder of said light source (4) embeds said even tabula rasa (2), and said light pipe (3) is arranged on a side of said even tabula rasa (2); Said even tabula rasa (2) is used for light uniformization that said light source (4) is sent, and said light pipe (3) is used for the light of said even tabula rasa (2) homogenising is directed to imaging surface (6).
2. imaging lighting device according to claim 1; It is characterized in that; Said even tabula rasa (2) comprises reflector plate (205), LGP (206) and diffusion sheet (207); The lamp holder of said light source (4) is embedded in the said LGP (206), and with respect to said LGP (206), said reflector plate (205) is close to setting with said LGP (206) on away from the direction of said imaging surface (6); Be used for the light of said LGP (206) diffusion is reflexed in the said LGP (206) again; Said diffusion sheet (207) is close to setting with said LGP (206) on the direction of closing on said imaging surface (6), and said diffusion sheet (207) and said light pipe (3) adjacency, is used for the light scattering that said LGP (206) is interior and is transmitted to said light pipe (3).
3. imaging lighting device according to claim 2 is characterized in that, the edge of said LGP (206) is provided with at least one outshot, and this outshot is provided with light source mounting hole (201), is used to embed the lamp holder of said light source (4).
4. imaging lighting device according to claim 2 is characterized in that, the one side at least of said LGP (206) is provided with and is a plurality of scattering points (202) that optical pattern is arranged.
5. imaging lighting device according to claim 2 is characterized in that, is provided with encapsulation reflectance coating (204) at the side of said LGP (206).
6. imaging lighting device according to claim 2 is characterized in that, also is provided with imaging hole (203) on the said LGP (206).
7. imaging lighting device according to claim 1 and 2; It is characterized in that; Said light pipe (3) is the tubular light gatherer, and the shape of said light pipe (3) one ends is consistent with the shape of the even tabula rasa (2) that closes on, and the shape of said light pipe (4) other end is consistent with the shape of viewfinder window.
8. imaging lighting device according to claim 7 is characterized in that, the inwall (302) of said light pipe (3) is provided with mirror face reflection coating or diffuse reflection coating.
9. an optical identification equipment is characterized in that, comprising:
Shell (5) with viewfinder window,
Be arranged on the imaging modules (1) in the shell (5), be used for obtaining the optical imagery of imaging surface (6) from said viewfinder window;
Be arranged on the arbitrary described imaging lighting device of claim 1～8 in the shell (5), the light pipe of said imaging lighting device (3) is relative with said viewfinder window, and for said imaging modules (1) illumination of said imaging surface (6) is provided.
10. optical identification equipment according to claim 9; It is characterized in that; Also be provided with imaging hole (203) on the LGP of said imaging lighting device (206), the center of said imaging hole (203) is consistent with the entrance pupil center (102) of the camera lens (103) of said imaging modules (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220126288.3U CN202631917U (en) | 2012-03-29 | 2012-03-29 | Imaging lighting device and optical identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220126288.3U CN202631917U (en) | 2012-03-29 | 2012-03-29 | Imaging lighting device and optical identification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202631917U true CN202631917U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220126288.3U Expired - Lifetime CN202631917U (en) | 2012-03-29 | 2012-03-29 | Imaging lighting device and optical identification device |
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| CN (1) | CN202631917U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621775A (en) * | 2012-03-29 | 2012-08-01 | 李卫伟 | Imaging and lighting device and optical identifying equipment |
| CN104320614A (en) * | 2014-10-14 | 2015-01-28 | 中国西电电气股份有限公司 | Interior video monitoring system and method of GIS (Geographic Information System) device |
| CN106324819A (en) * | 2015-07-09 | 2017-01-11 | 承奕科技股份有限公司 | Anti-glare uniform-light light source and image capture device with same |
-
2012
- 2012-03-29 CN CN201220126288.3U patent/CN202631917U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621775A (en) * | 2012-03-29 | 2012-08-01 | 李卫伟 | Imaging and lighting device and optical identifying equipment |
| CN102621775B (en) * | 2012-03-29 | 2014-04-16 | 北京慧眼智行科技有限公司 | Imaging and lighting device and optical identifying equipment |
| CN104320614A (en) * | 2014-10-14 | 2015-01-28 | 中国西电电气股份有限公司 | Interior video monitoring system and method of GIS (Geographic Information System) device |
| CN104320614B (en) * | 2014-10-14 | 2018-10-02 | 中国西电电气股份有限公司 | A kind of GIS device interior video monitoring system and method |
| US10666907B2 (en) | 2014-10-14 | 2020-05-26 | China Xd Electric Co., Ltd. | Internal video monitoring system and method for GIS device |
| CN106324819A (en) * | 2015-07-09 | 2017-01-11 | 承奕科技股份有限公司 | Anti-glare uniform-light light source and image capture device with same |
| WO2017005153A1 (en) * | 2015-07-09 | 2017-01-12 | 承奕科技股份有限公司 | Anti-glare light-equalizing light source and image capturing device having same |
| CN106324819B (en) * | 2015-07-09 | 2019-02-01 | 承奕科技股份有限公司 | The even radiant of anti-glare and the image capture unit for having the light source |
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