CN103685833A - Lighting equipment, image sensor unit and paper type recognition equipment - Google Patents
Lighting equipment, image sensor unit and paper type recognition equipment Download PDFInfo
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- CN103685833A CN103685833A CN201310404403.8A CN201310404403A CN103685833A CN 103685833 A CN103685833 A CN 103685833A CN 201310404403 A CN201310404403 A CN 201310404403A CN 103685833 A CN103685833 A CN 103685833A
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Abstract
Lighting equipment, an image sensor unit and paper type recognition equipment are provided; the lighting equipment comprises a light source emitting light in various wavelength and a rod light guide body used for shaping the light emitted by the light source; the light guide body is formed by material having a zone with non-consistent transmitivity for wavelength; the light source is configured on one end of the light guide body in a vertical direction; the light source comprises the wavelength of a zone with non-consistent transmitivity for the light guide body; a reflection surface is formed on the other end of the light guide body in the vertical direction; the reflection surface comprises a reflection part having reflection rate difference to the light of various wavelength.
Description
Related application
The application based on and require the priority of the formerly Japanese patent application No.2012-197563 submitting on September 7th, 2012 and the Japanese patent application No.2013-141003 submitting on July 4th, 2013, its full content is incorporated herein by reference.
Technical field
The present invention relates to lighting apparatus, image sensor cell and paper identification equipment.More particularly, the present invention relates to send such as the lighting apparatus of the multi-wavelength's of visible ray and infrared light etc. light, the paper identification equipment that comprises the image sensor cell of this lighting apparatus and comprise this image sensor cell.
Background technology
Some image sensor cells of reading images comprise the bar-shaped light guide that makes the light shape that sent by the point-source of light such as LED etc.In the structure of light source with the one end that is configured in light conductor longitudinal direction, the illumination intensity of the light sending from light conductor may reduce towards the end of opposition side.Patent documentation 1 and patent documentation 2 disclose the light conductor on the inclined plane that comprises certain angle, and this inclined plane does not allow light transmission, and inclined plane is formed at the end at the opposition side of light source.According to this structure, the light of end that arrives the opposition side of light source is reflected to increase near the illumination intensity of light end.This Illumination Distribution of light that can make to spread all over whole light conductor is even.
The image sensor cell of reading images is also applied to the true and false paper identification equipment of determining bank note etc.True and false in order to determine, bank note is included in regions different with the image obtaining under infrared light under visible ray.Therefore the image sensor cell that, is applied to paper identification equipment can send visible ray and infrared light to read visible images and the infrared light image of bank note to bank note.
Patent documentation 1: TOHKEMY 2006-85975 communique
Patent documentation 2: TOHKEMY 2007-183470 communique
The material using according to light conductor, the spectral-transmission favtor of light conductor can be different.Therefore, if the transmissivity of infrared light is lower than the transmissivity of visible ray, compare with the illumination intensity of visible ray, the illumination intensity of the infrared light sending from light conductor reduces towards the end of opposition side.Therefore the Illumination Distribution that, is mapped to the infrared light of bank note is tending towards inhomogeneous.As a result, may reduce the precision that reads of infrared light image.
Summary of the invention
In view of the foregoing, the object of the invention is to thering is the light of the wavelength of low transmissivity, to provide uniform Illumination Distribution in light conductor.
In order to address this problem, the invention provides a kind of lighting apparatus, it comprises: light source, it comprises a plurality of light-emitting components of the light that sends different wave length; And bar-shaped light guide, it is by the light shape being sent by described light source, wherein, described light source is disposed at one end in a longitudinal direction of described light conductor, described light conductor is made by the inconstant material of optical transmission rate of the different wave length that described light source is sent, and the reflecting surface that is provided with reflecting material is formed at the other end in a longitudinal direction of described light conductor, and described reflecting material has difference in reflectivity to the light of different wave length.
The invention provides a kind of image sensor cell, it comprises: light source, and it comprises a plurality of light-emitting components of the light that sends different wave length; Bar-shaped light guide, it is by the light shape being sent by described light source; Condensing body, it assembles the light from irradiated body; And imageing sensor, the reverberation that its reception is assembled by described condensing body is to convert described reverberation to the signal of telecommunication, wherein, described light source is disposed at one end in a longitudinal direction of described light conductor, described light conductor is made by the inconstant material of optical transmission rate of the different wave length that described light source is sent, and the reflecting surface that is provided with reflecting material is formed at the other end in a longitudinal direction of described light conductor, and described reflecting material has difference in reflectivity to the light of different wave length.
The invention provides a kind of paper identification equipment, it comprises image sensor cell and makes image sensor cell and irradiated body relatively under mobile state, read the light from described irradiated body.
Accompanying drawing explanation
Fig. 1 is the schematic, exploded of the structure of lighting apparatus 1;
Fig. 2 is that the arrow M of II in Fig. 1 part is to view;
Fig. 3 is that the spectral intensity of light source 11 is, the example graph of the relation between the reflectivity of the transmissivity of light conductor 12 and reflecting surface 123;
Fig. 4 is the schematic, exploded of structure that comprises the lighting apparatus 1 of the reflecting member 13 that is independent of light conductor 12;
Fig. 5 is the schematic, exploded of the structure of image sensor cell 3;
Fig. 6 is the schematic sectional view of the internal structure of image sensor cell 3, shows along the cross section of the planar interception vertical with main scanning direction;
Fig. 7 is the schematic sectional view of the structure of paper identification equipment 5, shows along the cross section of the planar interception vertical with main scanning direction;
Fig. 8 is the schematic sectional view of structure that also comprises the paper identification equipment 5 of transmission illumination equipment 52;
Fig. 9 is the schematic sectional view of structure that comprises the paper identification equipment 5 of two groups of image sensor cells 3;
Figure 10 A is the curve chart illustrating according to the Illumination Distribution of the lighting apparatus of comparative example, and this lighting apparatus does not comprise the reflecting surface with wavelength selectivity at the opposition side of the plane of incidence of light conductor;
Figure 10 B is the curve chart illustrating according to the Illumination Distribution of the lighting apparatus of comparative example, and this lighting apparatus comprises the aluminium film as the reflector of reflecting surface;
Figure 10 C illustrates the curve chart of the Illumination Distribution of lighting apparatus 1 according to an embodiment of the invention;
Figure 11 is the curve chart that the spectral-transmission favtor of acrylic resin is shown;
Figure 12 is the partial enlarged drawing that the spectral-transmission favtor of acrylic resin is shown.
Embodiment
Now, describe with reference to the accompanying drawings embodiments of the present invention in detail.Embodiments of the present invention comprise lighting apparatus 1, comprise the image sensor cell 3 of lighting apparatus 1 and the paper identification equipment 5 that comprises image sensor cell 3.In the accompanying drawings, will represent three-dimensional by arrow X, Y and Z.Directions X is the main scanning direction of image sensor cell 3.Y-direction is the sub scanning direction of image sensor cell 3.Z direction is the above-below direction of image sensor cell 3.
In embodiments of the present invention, " light " not only comprises visible ray, is also included in the electromagnetic wave (for example, the wavelength of region of ultra-red and ultraviolet region) of visible ray wavelength in addition.
(lighting apparatus)
The structure of lighting apparatus 1 is described with reference to Fig. 1 and Fig. 2.Fig. 1 is the schematic, exploded of the structure of lighting apparatus 1.Fig. 2 is that the arrow M of II in Fig. 1 part is to view.Illustrate after a while being incorporated into image sensor cell 3() in the situation that, lighting apparatus 1 sends visible ray and infrared light to the bank note P as irradiated body (paper).
As shown in Figure 1, lighting apparatus 1 comprises light source 11 and light conductor 12.
As shown in Figure 1, the end face of light conductor 12 on main scanning direction is the plane of incidence 121, and the light being sent by light source 11 enters from the plane of incidence 121.
As shown in Figure 2, light conductor 12 another end face on main scanning direction is reflecting surface 123, the light that these reflecting surface 123 reflections are sent by light source 11.The reflection of light rate that the reflection of light rate of 123 pairs of specific wavelengths of reflecting surface is compared other wavelength is high.For example, reflecting surface 123 is provided with the film as the reflector 125 of reflection part, and this reflection part is high to the reflectivity of other wavelength to the luminance factor of specific wavelength.
As depicted in figs. 1 and 2, exit facet 122 and diffusing surface 124 are formed at the side of light conductor 12.
According to the size of bank note P, set the size of exit facet 122 on main scanning direction.For example, under the state that image sensor cell 3 relatively moves at the longitudinal direction along bank note P, read, and set the size of exit facet 122 on main scanning direction according to the minor face size of bank note P.
Diffusing surface 124 is to make irreflexive of the light that enter from the plane of incidence 121.Diffusing surface 124 is formed in the face of exit facet 122.For example, a plurality of prism-like diffusion portion is formed at diffusing surface 124 with required interval.The interval of a plurality of diffusion portion (approaches the plane of incidence 121) from one end and diminishes to the other end (approaching reflecting surface 123) on main scanning direction.
Diffusion portion can be such as being by the printed patterns of making by the reflecting coating of the generations such as silk screen printing.In this case, the density of printed patterns reduces along with the reducing of distance apart from the plane of incidence 121, and increases along with the increase of the distance apart from the plane of incidence 121.This structure can prevent or suppress Illumination Distribution inhomogeneous of the light that sends from exit facet 122.Especially, the illumination intensity that this structure could prevent or suppress light reduces along with the increase of the distance apart from the plane of incidence 121, and can prevent or suppress to spread all over Illumination Distribution inhomogeneous of the light of whole light conductor 12.
Other faces of the outer peripheral face of light conductor 12 play the effect for catoptrical reflecting surface.
The feature of reflecting surface 123 is described with reference to Fig. 3.The film of reflector 125 is formed at reflecting surface 123, and the film reverberation of reflector 125.Fig. 3 is that the spectral intensity of light source 11 is, the example graph of the relation between the reflectivity of the reflector 125 of the transmissivity of light conductor 12 and reflecting surface 123.
The spectral-transmission favtor that is coated to the resin material of light conductor 12 changes according to wavelength.More specifically, light conductor 12 is formed by the material that comprises the inconstant wavelength region may of transmissivity.For example, acrylic resin is low to the transmissivity of the transmissivity comparison visible ray (R being sent by light source 11, G and B coloured light) of infrared light.Therefore,, when light source 11 is disposed at one end on main scanning direction of light conductor 12, near the illumination intensity of the infrared light other end of light conductor 12 on main scanning direction is lower than the illumination intensity of visible ray.As a result, the Illumination Distribution that spreads all over whole light conductor 12 of infrared light is inhomogeneous.On the other hand, when the film of reflection of light device 125 of reflection all wavelengths is formed at the reflecting surface 123 of the other end on the longitudinal direction that is configured in light conductor 12, can make the Illumination Distribution of infrared light even, but near the illumination intensity of visible ray reflecting surface 123 increase.As a result, spread all over the Illumination Distribution of whole light conductor 12 inhomogeneous.
Like this, when the low material of optical transmission rate of comparing other wavelength by the optical transmission rate to specific wavelength when light conductor 12 is made, be difficult to obtain the uniform illuminance of light (being infrared light) of specific wavelength and the uniform illuminance of the light (being visible ray) of other wavelength here here.
Therefore, the film of the reflection of light rate of specific wavelength being compared to the reflector 125 that the reflection of light rate of other wavelength is high is formed at reflecting surface 123, and reflecting surface 123 is end faces of opposition side of the plane of incidence 121 of light conductor 12.More specifically, the transmissivity of comparing visible ray due to the transmissivity of 12 pairs of infrared lights of light conductor is low, so the luminance factor of infrared light is formed to the reflecting surface 123 of light conductor 12 to the film of the high reflector 125 of the reflectivity of visible ray.
According to this structure, the infrared light that enters and arrive reflecting surface 123 from the plane of incidence 121 is reflected face 123 reflections and penetrates from exit facet 122.This illumination intensity that can prevent infrared light reduces along with the increase of the distance apart from the plane of incidence 121, and can make the Illumination Distribution of infrared light even.
On the other hand, the visible ray that enters and arrive reflecting surface 123 from the plane of incidence 121 is reflected face 123 reflections or absorbs according to the reflectivity of reflector 125.This illumination intensity that can prevent visible ray increases near the end of reflecting surface, and can make the Illumination Distribution of visible ray even.
This can spread all over whole light conductor 12 and obtain the uniform illuminance of infrared light and the uniform illuminance of visible ray.
Like this, by the film that comprises the reflector 125 that reflectivity (or absorptivity) reflecting material difference, that have wavelength selectivity is made, be formed the example of the reflection part on reflecting surface 123.For example, can adopt coating as the structure (forming the structure of film) of the coating with this feature of reflecting material.For example the various known coating of infrared reflection pigment can be used as this coating.
Selectively, can comprise the reflecting member 13 as the example of reflection part, this reflecting member 13 contains reflecting material and is independent of light conductor 12 and forms.Fig. 4 is the schematic, exploded of structure that comprises the lighting apparatus 1 of the reflecting member 13 that is independent of light conductor 12.As shown in Figure 4, light source 11 is disposed at light conductor 12 one end on main scanning direction, and reflecting member 13 is configured in the other end.Reflecting member 13 has the surface characteristic identical with reflector 125.For example, as above have plate of being coated with as the coating of reflecting material etc. and be used as reflecting member 13.Reflecting member 13 is configured to reflecting surface 123 or the contact reflex face 123 in the face of light conductor 12.According to this structure, the outside infrared light that is transmitted into light conductor 12 from the reflecting surface 123 of light conductor 12 is reflected member 13 reflections and again enters light conductor 12.Therefore, can obtain identical beneficial effect.
(image sensor cell)
The structure of image sensor cell 3 is described with reference to Fig. 5 and Fig. 6.Fig. 5 is the schematic, exploded of the structure of image sensor cell 3.Fig. 6 is the schematic sectional view of the internal structure of image sensor cell 3, shows along the cross section of the planar interception vertical with main scanning direction.Image sensor cell 3 can be based on from bank note P visible ray and the infrared light image that reads bank note P.
As shown in Figure 5 and Figure 6, light conductor 12 is incorporated in the light conductor receiving room 311 of frame 31.Condensing body 32 is incorporated in the condensing body receiving room 312 of frame 31.The circuit board 33 that light source 11 and imageing sensor 34 are installed is incorporated in substrate reception chamber 313.
When the circuit board 33 that is incorporated in light conductor receiving room 311 and light source 11 is installed when light conductor 12 is incorporated in substrate reception chamber 313, light source 11 is to be incorporated in light source receiving room 314 in the face of being formed at the mode of the plane of incidence 121 of light conductor 12 one end.Therefore the light, being sent by light source 11 enters the plane of incidence 121 of the one end that is formed at light conductor 12.When use is independent of the reflecting member 13 of light conductor 12, reflecting member 13 is in the face of the other end of (or contact) light conductor 12.As a result, the light sending from the other end of light conductor 12 is reflected member 13 reflections, and again enters light conductor 12.
Except the film of reflector 125 or reflecting member 13 being disposed to the structure of reflecting surface 123 of light conductor 12, the structure of inner surface that the film of reflector 125 is formed to the light conductor receiving room 311 of frame 31 is also possible, wherein, this inner surface relative with the reflecting surface 123 of light conductor 12 (or contact).This structure also can obtain beneficial effect.
For light being transmitted into bank note P, light source 11 is lighted the light-emitting component of each color of light and infrared light successively.The light being sent by light source 11 (RGB color visible ray and infrared light) enters light conductor 12 from the plane of incidence 121 of light conductor 12, and under the state that is diffused face 124 and the reflection of other reflectings surface at internal communication.Light is transmitted into the read line O of bank note P from the exit facet 122 of light conductor 12.
Condensing body 32 will arrive the surface of imageing sensor 34 in the reverberation Jiao of the read line O from bank note P.Imageing sensor 34 converts the optical image being formed by condensing body 32 to the signal of telecommunication.
Not shown and the unaccounted part of image sensor cell 3 can be identical with conventionally known image sensor cell.
(paper identification equipment)
With reference to Fig. 7, the paper identification equipment 5 that image sensor cell 3 is applied to is described.Fig. 7 is the schematic sectional view of the structure of paper identification equipment 5, shows along the cross section of the planar interception vertical with main scanning direction.Paper identification equipment 5 sends light to read the light from bank note P to bank note P etc., and the light reading with this is identified the kind of bank note P or true and false.
As shown in Figure 7, paper identification equipment 5 comprises the conveying roller 51 of image sensor cell 3 and conveying bank note P.In paper identification equipment 5, for keeping bank note P to carry the transport path A of bank note P to be arranged on conveying roller 51 between along read direction (sub scanning direction) via lid member 35 on image sensor cell 3.In this case, condensing body 32 is arranged on the central authorities of transport path A in the focus of bank note P side.The following is the operation of the paper identification equipment 5 with this structure.Based on aforesaid operations, the image sensor cell 3 that is applied to paper identification equipment 5 reads the visible images of the predetermined pattern that is disposed at bank note P, and reads the infrared light image of bank note P.Paper identification equipment 5 is then by determining the true and false of bank note P than serious banknote image and visible images and the infrared light image of the bank note P that will judge in true and false judgement, and wherein true banknote image is by obtaining to ready true bank note P transmitting visible ray and infrared light.This is because true bank note P is included in regions different with the image obtaining under infrared light under visible ray.Undeclared or unshowned part can be identical with traditional paper identification equipment.
Paper identification equipment 5 can also comprise transmission illumination equipment 52.Fig. 8 is the schematic sectional view of structure that also comprises the paper identification equipment 5 of transmission illumination equipment 52.
The following is the operation of the paper identification equipment 5 with this structure.Be combined to the light source 11 of the lighting apparatus 1 in image sensor cell 3 and the light source 11 of transmission illumination equipment 52 and light successively the light-emitting component of each color visible ray and infrared light.
From the lighting apparatus 1 of image sensor cell 3, be transmitted into the visible ray of bank note P and infrared light by the surface reflection of bank note P and enter condensing body 32, and at the image forming surface of imageing sensor 34.Imageing sensor 34 is converted to the signal of telecommunication by formed optical image and obtains visible images and infrared light image with the reverberation based on from bank note P.In addition, from transmission illumination equipment 52, be transmitted into the visible ray of bank note P and infrared light sees through the condensing body 32 that bank note P enters image sensor cell 3, and at the image forming surface of imageing sensor 34.Imageing sensor 34 is converted to the signal of telecommunication by formed optical image and obtains visible images and infrared light image with the light that sees through based on from bank note P.
According to this structure, the reverberation that paper identification equipment 5 can be based on bank note P and see through light and read visible images and infrared light image.
Paper identification equipment 5 also can comprise two groups of image sensor cells 3.Fig. 9 is the schematic sectional view of structure that comprises the paper identification equipment 5 of two groups of image sensor cells 3.
As shown in Figure 9, two groups of image sensor cells 3 are configured to face with each other across the transport path A of bank note P.These two groups of image sensor cells 3 are configured to make send and see through the visible ray of bank note P and the condensing body 32 that infrared light enters another image sensor cell 3 from the lighting apparatus 1 of an image sensor cell 3.
The following is the operation of the paper identification equipment 5 with this structure.The light source 11 that is combined to two groups of lighting apparatus 1 in image sensor cell 3 is lighted the light-emitting component of each color visible ray and infrared light successively.The visible ray sending to bank note P from the lighting apparatus 1 of an image sensor cell 3 and infrared light are by the surface reflection of bank note P and enter the condensing body 32 of a described image sensor cell 3, and at the image forming surface of the imageing sensor 34 of a described image sensor cell 3.The imageing sensor 34 of a described image sensor cell 3 is converted to the signal of telecommunication by formed optical image and obtains visible images and infrared light image with the reverberation based on from bank note P.The visible ray sending from the lighting apparatus 1 of a described image sensor cell 3 and infrared light see through bank note P and enter the condensing body 32 of another image sensor cell 3, and at the image forming surface of the imageing sensor 34 of described another image sensor cell 3.The imageing sensor 34 of described another image sensor cell 3 is converted to the signal of telecommunication by formed optical image and obtains visible images and infrared light image with the light that sees through based on from bank note P.
According to this structure, paper identification equipment 5 can read bank note P two sides reflected image and can read through image.
(embodiment)
Embodiment with reference to Figure 10 A to Figure 10 C explanation checking beneficial effect of the present invention.Figure 10 A is the curve chart illustrating according to the Illumination Distribution of the lighting apparatus of the first comparative example, and this lighting apparatus does not comprise the reflecting surface with wavelength selectivity at the opposition side of the plane of incidence of light conductor.Figure 10 B is the curve chart illustrating according to the Illumination Distribution of the lighting apparatus of the second comparative example, and this lighting apparatus comprises the aluminium film as the reflector of reflecting surface.Figure 10 C illustrates the curve chart of the Illumination Distribution of lighting apparatus 1 according to an embodiment of the invention, and wherein, the reflecting material of the reflecting surface of lighting apparatus 1 has been used " IR black " (manufacture of Seiko ink company) as infrared reflection pigment.
Figure 11 is the figure that the spectral-transmission favtor of acrylic resin is shown.Figure 12 is the partial enlarged drawing of Figure 11.As shown in Figure 11 and Figure 12, line 100 represents the spectral-transmission favtor of acrylic resin.Spectral-transmission favtor represents the transmissivity of each wavelength of light.Acrylic resin reduces along with the increase of transmissivity the absorptivity of light, and acrylic resin increases along with reducing of transmissivity the absorptivity of light.
For example, synthetic resin comprises for absorbing the region of infrared light.Acrylic resin comprises the region of 800nm to 1000nm.This is the inherent characteristic of material, and the absorption of vibrations infrared light being caused by the structure of synthetic resin.
The spectral-transmission favtor of the acrylic resin in Figure 11 and Figure 12 represents the data of the test specimen of thickness (d)=2mm.Therefore, for example,, in the light conductor that is A4 at width, effect is being gathered from 220mm to 230mm.
In an embodiment of the present invention, aluminium is used to the reflector 125 of reflecting surface 123.
The opposition side that the first comparative example of Figure 10 A is illustrated in the plane of incidence of light conductor does not form the structure of the reflecting surface with wavelength selectivity.Although the Illumination Distribution of visible ray is substantially even,, the Illumination Distribution of infrared light reduces along with the increase of the distance apart from the plane of incidence.This may be because when acrylic resin is used to light conductor, because the transmissivity of the infrared light in 800nm to 1000nm scope (Ir) is lower than the transmissivity of visible ray (R, G and B), so the amount of the infrared light penetrating from exit facet reduces along with the increase of the distance apart from the plane of incidence.Like this, at the opposition side of the plane of incidence of light conductor, do not form in the structure of the reflecting surface with wavelength selectivity, the Illumination Distribution of infrared light is inhomogeneous.
The second comparative example of Figure 10 B illustrates the structure that comprises the aluminium film that is disposed at reflecting surface.The illumination intensity that prevents infrared light reduces along with the increase of the distance apart from the plane of incidence.Yet the illumination intensity of visible ray is along with increasing apart from reducing of reflecting surface distance.This may be because aluminium to the reflectivity of visible ray and to the reflectivity of infrared light the difference between the two little, so visible ray is reflected face reflection and penetrates from exit facet.Like this, in the structure of the light of all wavelengths being sent by light source in reflecting surface reflection, the Illumination Distribution of visible ray is inhomogeneous.
Figure 10 C shows the embodiments of the invention that comprise the reflecting surface with wavelength selectivity.The Illumination Distribution of infrared light is more even than the Illumination Distribution of the example shown in Figure 10 A, and compares with the example shown in Figure 10 B, and the Illumination Distribution of visible ray is maintained at uniform state.Like this, according to embodiments of the invention, can make the Illumination Distribution of visible ray and infrared light even.
Although with reference to the accompanying drawings of embodiments of the present invention, in any case the present invention is not limited to these execution modes.Can carry out various modification in the case without departing from the scope of the present invention.For example, although the reflecting surface of light conductor is high to the reflectivity of visible ray to the luminance factor of infrared light in execution mode, the feature of reflecting surface is not limited to this feature.For optionally reflecting the reflection of light face being absorbed by the material for light conductor 12, can be formed at the other end, the material with the short wavelength by such as ultraviolet light etc. with low transmissivity forms Uniform Illumination between short wavelength and long wavelength.In this case, light source 11 can comprise light-emitting component (for example, ultraviolet leds), and this light-emitting component sends the light such as ultraviolet region etc. shorter than visible light wavelength.
Like this, when light source sends multi-wavelength's light and light conductor, the transmissivity of the specific wavelength part in the multi-wavelength's who is sent by light source light is compared to the transmissivity of other wavelength when low, the reflecting surface that specific wavelength is partly had to a difference in reflectivity can be formed at another end face of light conductor.
Although bank note is used as paper in execution mode,, the type of paper is unrestricted.For example, paper can be various security and ID card.No matter type, as long as paper can react to infrared light, just can be employed.
The present invention is the effective technology using in lighting apparatus, image sensor cell and paper identification equipment.
According to the present invention, in one end of the light source opposition side of light conductor, there is the reflection part reflection of difference in reflectivity from the multi-wavelength's of light source light.This can prevent or suppress the inhomogeneous of the reduction of illumination intensity and Illumination Distribution.
Claims (7)
1. a lighting apparatus, it comprises:
Light source, it comprises a plurality of light-emitting components of the light that sends different wave length; With
Bar-shaped light guide, it is the light shape being sent by described light source, wherein,
Described light source is disposed at one end in a longitudinal direction of described light conductor,
Described light conductor is made by the inconstant material of optical transmission rate of the different wave length that described light source is sent, and
The reflecting surface that is provided with reflecting material is formed at the other end in a longitudinal direction of described light conductor, and described reflecting material has difference in reflectivity to the light of different wave length.
2. lighting apparatus according to claim 1, wherein,
Described light source comprises the light-emitting component of the wavelength that sends region of ultra-red.
3. lighting apparatus according to claim 1, wherein,
Described light source comprises the light-emitting component of the wavelength that sends ultraviolet region.
4. an image sensor cell, it comprises:
Light source, it comprises a plurality of light-emitting components of the light that sends different wave length;
Bar-shaped light guide, it is by the light shape being sent by described light source;
Condensing body, it assembles the light from irradiated body; With
Imageing sensor, it receives the reverberation assembled by described condensing body to convert described reverberation to the signal of telecommunication, wherein,
Described light source is disposed at one end in a longitudinal direction of described light conductor,
Described light conductor is made by the inconstant material of optical transmission rate of the different wave length that described light source is sent, and
The reflecting surface that is provided with reflecting material is formed at the other end in a longitudinal direction of described light conductor, and described reflecting material has difference in reflectivity to the light of different wave length.
5. image sensor cell according to claim 4, wherein,
Described light source comprises the light-emitting component of the wavelength that sends region of ultra-red.
6. image sensor cell according to claim 4, wherein,
Described light source comprises the light-emitting component of the wavelength that sends ultraviolet region.
7. a paper identification equipment, it makes image sensor cell and irradiated body relatively under mobile state, read the light from described irradiated body, wherein,
Described image sensor cell is according to the image sensor cell described in any one in claim 4 to 6.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012197563 | 2012-09-07 | ||
| JP2012-197563 | 2012-09-07 | ||
| JP2013-141003 | 2013-07-04 | ||
| JP2013141003A JP5820845B2 (en) | 2012-09-07 | 2013-07-04 | Illumination device, image sensor unit, and paper sheet identification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103685833A true CN103685833A (en) | 2014-03-26 |
| CN103685833B CN103685833B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310404403.8A Expired - Fee Related CN103685833B (en) | 2012-09-07 | 2013-09-06 | Lighting apparatus, image sensor cell and paper type recognition |
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| Country | Link |
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| CN (1) | CN103685833B (en) |
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| CN109040508A (en) * | 2017-06-12 | 2018-12-18 | 菱光科技股份有限公司 | Light source module group and image-taking device |
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| WO2016141801A1 (en) * | 2015-03-11 | 2016-09-15 | 山东新北洋信息技术股份有限公司 | Image sensor and banknote processing apparatus |
| US10410454B2 (en) | 2015-03-11 | 2019-09-10 | Shandong New Beiyang Information Technology Co., Ltd. | Image sensor and banknote processing apparatus |
| CN107160867A (en) * | 2017-05-08 | 2017-09-15 | 西安印艺苑实业有限公司 | Recognize method, device and the printer of print paper attribute |
| CN109040508A (en) * | 2017-06-12 | 2018-12-18 | 菱光科技股份有限公司 | Light source module group and image-taking device |
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| CN103685833B (en) | 2016-03-23 |
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