JP3359149B2 - Counterfeit identification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to banknotes, passports, I
The present invention relates to a device for discriminating forgery of D cards, securities, and the like, and particularly to a forgery discriminating device excellent in portability.

[0002]

2. Description of the Related Art Conventionally, various methods have been used to discriminate counterfeiting of bills, stamps, securities, and the like. Among these methods, there are a method using infrared rays and a method using ultraviolet rays. First, a method using infrared light will be described. Here, it is used for a bill or the like on which ink that reflects and absorbs infrared rays is selectively printed. The surface of the bill or the like is irradiated with infrared rays, the image is photographed by an infrared camera, and the photographed image is displayed on a TV monitor. T
On the screen of the V monitor, the image disappears only in the portion where the reflected ink is printed, resulting in an image clearly different from a forged bill or the like. By observing the display image on the TV monitor with the naked eye, the observer can easily discriminate whether the bill or the like is counterfeit. This observation is performed in a light-shielded room for blocking external light, and equipment such as an infrared irradiation device, an infrared camera, and a TV monitor is required.

[0003] Next, a method using ultraviolet light will be described. Here, it is used for bills and the like mixed with a fluorescent dye. When the surface of the bill or the like is irradiated with ultraviolet light, the fluorescent dye portion emerges. The observer can easily discriminate whether the bill or the like is counterfeit by observing the surface of the bill or the like irradiated with ultraviolet light with the naked eye. This observation is also performed in a light-shielded room for blocking external light, and equipment such as an ultraviolet irradiation device is required. In addition to banknotes mixed with fluorescent dyes, banknotes that use fluorescent ink for part or all of printing, such as banknotes that incorporate fibers containing fluorescent dyes, banknotes that incorporate fluorescent pieces, etc. Etc. may be used.

[0004]

However, the conventional method of discriminating counterfeit bills or the like must be performed in a light-shielded room, and requires a dedicated operator who is accustomed to working in a dark place. In addition, it requires large-scale equipment, and in particular, it is dangerous to use ultraviolet light when seeing it,
Harmful UV-cut glasses were needed.

The present invention has been made to solve the problem that the conventional method of discriminating forgery of banknotes and the like requires large-scale facilities and requires a dedicated operator. It is an object of the present invention to provide a counterfeit discriminating apparatus that allows even a beginner to sufficiently discriminate counterfeit bills and the like.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, a forgery discriminating apparatus of the present invention is a forgery discriminating apparatus which is mounted on an object to be discriminated and visually discriminates forgery,
(A) a light-shielding housing having a lower plane that is a surface that is brought into close contact with the object to be distinguished, and an upper plane that is substantially parallel to the lower plane;
(B) a window provided on the lower flat surface of the light-shielding housing;
(C) a light source disposed in the light-shielding housing and irradiating invisible light toward the window; and (d) an imaging unit disposed in the light-shielding housing and capturing an image of the object to be identified through the window. , (E)
A display unit provided on an upper flat surface of the light-shielding housing, having a display surface outside the housing, and displaying an image captured by the imaging unit.

[0007]

According to the counterfeit discriminating apparatus of the present invention, when the discrimination object is a genuine object, a special process for changing the design in response to invisible light is applied to the surface. Therefore, when the invisible light is applied to the object to be discriminated, a design different from the design under visible light appears on the surface. Further, when the object to be discriminated is a counterfeit product, no special processing is performed, so that the pattern does not change even if the object to be discriminated is irradiated with invisible light.

When the object to be distinguished is genuine, if the lower flat surface is placed on the object to be distinguished, the invisible light from the light source is irradiated through the window to the object to be distinguished, and the invisible light is irradiated. , An image of a design different from the design of the object to be identified under visible light is captured by the imaging means. Further, when the object to be discriminated is a counterfeit product, if the lower flat surface is closely placed on the object to be discriminated, invisible light from the light source is irradiated to the object to be discriminated through the window, and this invisible light is irradiated. The image of the same design as the design of the object to be discriminated under visible light is captured by the imaging means.

The image thus captured is displayed on the display surface of the display means provided on the upper flat surface. By observing the image displayed on the display means, the observer can easily discriminate whether or not the discrimination target is a counterfeit product.

Since the upper plane and the lower plane of the light-shielding casing are substantially parallel to each other, the observer can observe the display image from the upper part of the counterfeit discriminating device placed on the discrimination object. If the object to be discriminated is larger than the window, the object to be discriminated is observed while the counterfeit discriminating device is slid from one end in the longitudinal direction of the object to be discriminated to the other end. For this reason, since the part other than the observation target of the discrimination object protrudes from the forgery discrimination device, by observing the protruding part simultaneously with the observation of the display image, an image of any part of the discrimination object is displayed on the display means. Can be grasped.

In particular, a straight line connecting the center of gravity of the plane surrounded by the outline of the window and the center of gravity of the display surface of the display means and the lower plane are arranged so as to be substantially perpendicular to each other. If the left-right direction matches the direction of the object to be discriminated and the image of the object to be discriminated displayed on the display means is an original size, the protruding portion of the object to be discriminated and the displayed image are almost continuous symbols. For this reason, it is possible to easily grasp which part of the image of the object to be identified is displayed on the display means without changing the line of sight.

Further, if an infrared irradiation light source is used as the light source, it is possible to discriminate a discrimination object whose design is changed by irradiation of infrared rays. Furthermore, if an ultraviolet irradiation light source is used as the light source, it is possible to identify an object to be identified whose pattern is changed by the irradiation of ultraviolet rays. Furthermore, if both the infrared light source and the ultraviolet light source are provided as the light source, and one or both of these light sources emit the infrared light and the ultraviolet light, the object to be differentiated and the ultraviolet light that changes the design by the infrared light are irradiated. Thus, any discrimination of a discrimination target object whose pattern is changed can be performed.

[0013] Further, the light source is disposed in a light-shielding housing,
Since the object to be identified is in close contact with the window, invisible light hardly leaks to the outside of the light-shielding casing. Therefore, invisible light (particularly, ultraviolet light) does not adversely affect the human body. In particular, when a liquid crystal display device is used as a display unit, the safety is further improved as compared with a CRT or the like that emits an electron beam. Further, since the light-shielding housing is provided, there is no need to observe the light-shielding room, and counterfeit discrimination can be easily performed.

[0014]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view illustrating the configuration of the counterfeit discriminating apparatus according to the present embodiment. As shown in the figure, the counterfeit discriminating apparatus according to the present embodiment includes an infrared LED 10 that emits infrared rays, a UV lamp 20 that emits ultraviolet rays, and a color CCD 30 that captures an irradiation image of infrared rays or ultraviolet rays.
Further, a color liquid crystal panel 40 for displaying an image picked up by the color CCD 30 and the above-described devices (infrared LED)
10 to a color liquid crystal panel 40). Here, the light shielding case 50
Has a display window 51 on the top surface and a reading window 52 on the bottom surface, and a protective glass is fitted in each window.

The infrared LED 10 is fitted into a support member 11 provided on a side surface inside the light shielding case 50 from obliquely below. Therefore, the infrared light emitted from the infrared LED 10 is applied to the entire surface of the reading window 52 provided diagonally below. Similarly, the UV lamp 20 is fitted into a support member 21 provided to face the support member 11 from obliquely below. Therefore, the ultraviolet light emitted from the UV lamp 20 is also applied to the entire surface of the reading window 52 provided diagonally below. Here, as the UV lamp 20, a cold cathode fluorescent lamp or a hot cathode fluorescent lamp coated with an ultraviolet fluorescent material is used. UV lamp 20
A visible light cut filter film for removing a visible light spectrum contained in the outgoing light is formed on the surface.
Instead of forming the visible light cut filter film, U
A visible light cut filter may be mounted on the front of the V lamp 20.

The color CCD 30 is fixed to the upper center of the reading window 52 with the image receiving surface facing downward. Color CCD 30
An optical low-pass filter 31 and a UV cut filter 32 are mounted on the image receiving surface. The optical low-pass filter 31 can remove moire fringes caused by the color mosaic filter on the color CCD 30 image receiving surface. In addition, the color C
Magenta fogging due to ultraviolet light passing through the magenta filter on the CD30 image receiving surface can be removed.
Since the color CCD 30 also captures an infrared image, an infrared cut filter inserted into a general color video camera is not mounted.

Further, an imaging lens 60 is mounted at a position separated from the image receiving surface of the color CCD 30 by a predetermined distance. By the imaging lens 60, an irradiation image such as infrared light projected on the reading window 52 is formed on the imaging surface of the color CCD 30. The chromatic aberration of the imaging lens 60 is corrected to such an extent that practically no focus shift occurs when forming either an infrared image or a visible light image. Therefore, the infrared LE
It is not necessary to adjust the focus each time the light from the D10 and the UV lamp 20 is switched.

The color liquid crystal panel 40 is arranged below the display window 51, and displays an image picked up by the color CCD 30 to the outside of the light shielding case 50. Further, a backlight unit 61 is arranged below the color liquid crystal panel 40, and the color liquid crystal panel 40 can obtain a sufficient contrast by the irradiation light from the backlight unit 61. As a light source of the backlight unit 61, a white fluorescent lamp is used. The contrast is adjusted by a brightness adjustment volume 62 provided on the side surface of the light shielding case 50.

A power connector 63 for receiving external power supply and an infrared LED 10
And a power switch 64 for turning on the power of the UV lamp 20. The power switch 64 is provided with two push button switches for turning on / off the infrared LED 10 and the UV lamp 20 respectively.

FIGS. 2A and 2B are side sectional views of the counterfeit discriminating apparatus according to the present embodiment. 2A is a cross-sectional view of the counterfeit discriminating apparatus shown in FIG. 1 as viewed from the direction of arrow A, and FIG. 2B is a cross-sectional view as viewed from the direction of arrow B. Among the configurations shown in these cross-sectional views, those omitted from the perspective view of FIG. 1 are a video circuit 70 and a UV lamp inverter 71.
The video circuit 70 is a circuit for performing processing for displaying an image captured by the color CCD 30 on the color liquid crystal panel 40, and includes a circuit for performing color correction and the like. The circuit for performing color correction includes a circuit for trapping a color signal (chroma signal) in a video signal when irradiating infrared rays. This circuit is for displaying an infrared image obtained by turning on the power of the infrared LED 10 and irradiating infrared light on the color liquid crystal panel 40 as a monochrome image. That is, when an infrared image is picked up by the color CCD 30 and displayed on the color liquid crystal panel 40, the image becomes reddish due to the reaction between the magenta and yellow pixels, which is very difficult to see. Therefore, the color signals are trapped and displayed on the color liquid crystal panel 40 as a monochrome image, so that the visibility of the displayed image is improved.

FIG. 3 is a conceptual diagram showing a use state of the forgery discriminating apparatus of the present embodiment. As shown in the figure, the counterfeit discriminating apparatus of the present embodiment is used by bringing the reading window 52 into close contact with the surface of a bill 80 to be discriminated. Next, when any one of the push button switches of the power switch 64 (see FIG. 2B) is pressed by the observer, the power of the infrared LED 10 and the like is turned on. Here, if the surface of the banknote 80 is selectively printed with ink that reflects and absorbs infrared rays, the power of the infrared LED 10 is turned on. When the surface of the banknote 80 is printed with ink containing a fluorescent dye, the power of the UV lamp 20 is turned on.
If it is not clear whether the bill 80 is printed with ink that responds to infrared light or ultraviolet light, the infrared LED
The power of both the lamp 10 and the UV lamp 20 is turned on.

When the power of one or both of the infrared LED 10 and the UV lamp 20 is turned on by operating the power switch 64 in this manner, as shown in FIG. And ultraviolet rays) are applied to the entire surface of the reading window 52. This irradiation light is transmitted through the reading window 52 and is given to the surface of the banknote 80 closely attached to the outside of the reading window 52. If the bill 80 is a bill printed with special ink, the design of the bill 80 will be different from that under visible light due to irradiation of infrared rays or the like. When the bill 80 is a fake bill that does not use special ink, the design of the bill 80 becomes the same as that under visible light even by irradiation with infrared rays or the like. The image of the symbol of the bill 80 is taken through the reading window 52 by the color CCD 30 disposed above the reading window 52. The image signal output from the color CCD 30 is
The image is subjected to predetermined image processing by the video circuit 70 and displayed on the color liquid crystal panel 40. By observing the image displayed on the color liquid crystal panel 40 through the display window 51, it is possible to easily determine whether or not the bill 80 is a fake bill. That is, the bill 8 displayed on the color liquid crystal panel 40
If the symbol 0 is different from the symbol under visible light, the bill 80 is a true bill, and if the symbols are the same, the bill 80 is a fake bill.

FIG. 3 shows that the display surface of the color liquid crystal panel 40 and the reading window 52 have substantially the same area. Also, when the observer looks into the apparatus from above, it can be seen that the display surface of the color liquid crystal panel 40 and the reading window 52 overlap. The color liquid crystal panel 40 and the reading window are arranged such that a straight line 90 connecting the center of gravity of the display surface of the color liquid crystal panel 40 to the center of the plane surrounded by the outline of the reading window 52 and the bottom surface of the light shielding case 50 are substantially perpendicular. This is because 52 is arranged.

Further, the up-down direction and the left-right direction of the image displayed on the color liquid crystal panel 40 are matched with the direction of the bill 80, and the bills 8 displayed on the color liquid crystal panel 40 are displayed.
The image of No. 0 is almost full size. Therefore, when the observer looks into the apparatus from above, the left and right portions of the bill 80 protruding from the apparatus and the image of the central portion of the bill 80 displayed on the color liquid crystal panel 40 are connected. The observer can recognize as a banknote 80. In this way, the present apparatus can easily grasp which part of the bill 80 is being discriminated.

FIGS. 4A and 4B show a color liquid crystal panel 40.
An example of display is shown. The banknote 81 used in this example is a fake bill printed with normal ink, and the banknote 82 is a true bill printed with ink that reflects infrared light on the face portion of the central human portrait and ink that absorbs infrared light on the rest. . In this example, only the power supply of the infrared LED 10 is turned on and the bills 81 and 8 are turned on.
2 is irradiated with infrared light. As shown in FIG. 4A, the pattern of the banknote 81 does not change even when the banknote 81 that is a fake bill is irradiated with infrared rays, so that an image of the same pattern as the pattern under visible light is displayed on the color liquid crystal panel 40. . FIG.
From (b), when the bill 82 as a bill is irradiated with infrared rays, the irradiation light of the face portion of the central portrait is reflected, so that an image in which the face portion is white is displayed on the color liquid crystal panel 40. . Here, it is assumed that the infrared light emitted from the infrared LED 10 is set to a wavelength from 800 nm to 950 nm at which the ink reacts and the color CCD 30 has sensitivity. When discriminating banknotes printed with a plurality of inks having individual infrared sensitivity characteristics, or when discriminating a plurality of banknotes printed with inks each having a different infrared sensitivity characteristic, the device emits light. It is desirable to provide a plurality of types of LEDs having different wavelengths.

Similarly, discrimination of a bill mixed with a fluorescent dye is performed by turning on the power of the UV lamp 20 and irradiating the bill with ultraviolet rays. In the case of a bill, the fluorescent dye of the bill emits light due to the irradiation of ultraviolet rays, and the image mixed with the fluorescent dye shines and appears on the color liquid crystal panel 40. When the bill is a fake bill, the bill does not emit light even when it is irradiated with ultraviolet rays, so that a substantially dark image is displayed on the color liquid crystal panel 40. From the image having such a difference, it can be easily determined whether or not the bill is a fake bill.

Next, a modification of this embodiment will be described with reference to FIG.
This will be described with reference to the side sectional view of FIG. As described above, the counterfeit discriminating apparatus shown in FIG. 1 is an apparatus that combines a counterfeit discriminating apparatus for banknotes responsive to infrared rays and a counterfeit discriminating apparatus for banknotes responsive to ultraviolet rays. On the other hand, the counterfeit discriminating apparatus shown in FIG. 5A is a discriminating apparatus dedicated to banknotes responsive to infrared rays, and FIG. 5B is a discriminating apparatus dedicated to banknotes responsive to ultraviolet rays.

As shown in FIG. 5A, in this counterfeit discriminating apparatus, the infrared LED 10 'is fitted to the supporting member 21 instead of the UV lamp 20, and the UV lamp inverter 71 is removed. Therefore, the reading window 52 has the infrared LED 1
Infrared rays are radiated from two directions of 0 and 10 ', and the reading window 5
It is possible to discriminate whether or not the banknote that reacts to the infrared rays adhered to 2 is counterfeit.

When an infrared image is picked up by the color CCD 30 and displayed on the color liquid crystal panel 40, the image becomes reddish due to the reaction between the pixels of Magellan and yellow, which is very difficult to see. Therefore, in this apparatus, a monochrome CCD 30 'and a monochrome liquid crystal panel 40' are mounted instead of the color CCD 30 and the color liquid crystal panel 40, and a monochrome image is displayed on the monochrome liquid crystal panel 40 '. Here, neither the optical low-pass filter 31 nor the UV cut filter 32 is mounted on the image receiving surface of the monochrome CCD 30 '. The optical low-pass filter 31 is unnecessary because moiré fringes do not occur because the color CCD 30 is not used. The UV cut filter 32 is unnecessary because the UV lamp 20 is not used. Further, since the monochrome CCD 30 'is used in this apparatus, no circuit is provided for trapping a color signal (chroma signal) to convert a color image into a monochrome image.

As shown in FIG. 5B, the counterfeit discriminating apparatus removes the infrared LED 10 together with the supporting member 11. For this reason, only the ultraviolet rays from the UV lamp 20 are radiated to the reading window 52, and it is possible to discriminate whether or not the banknote that reacts to the ultraviolet rays adhered to the reading window 52 is counterfeit.

The emission image of the fluorescent dye upon irradiation with ultraviolet light is
An image can be picked up by either the color CCD 30 or the monochrome CCD 30 '. The device shown in FIG.
The CD 30 'and the monochrome liquid crystal panel 40' are mounted, but the monochrome CCD 30 'and the monochrome liquid crystal panel 40' are mounted.
'Instead of the color CCD 30 and the color liquid crystal panel 40
May be attached. In the case of the present apparatus using the monochrome CCD 30 ', the optical low-pass filter 31 is unnecessary, and only the UV cut filter 32 is mounted on the image receiving surface of the monochrome CCD 30'. The reason why the UV cut filter 32 is attached is to remove the fog due to the reflection of the ultraviolet rays from the banknotes to increase the contrast. On the other hand, when the color CCD 30 is used, the optical low-pass filter 31 and the UV cut filter 3
2 must be mounted on the image receiving surface of the color CCD 30. This apparatus is not provided with a circuit for trapping a color signal (chroma signal) to convert a color image into a monochrome image. This circuit is for improving the visibility when an infrared image is captured by the color CCD 30.
This is because it is not related to the present device from which the infrared LED 10 is removed.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the discrimination target is not limited to the banknotes 80 to 82, but may be a stamp, a passport, an ID card securities, or the like.

In the embodiment shown in FIG. 1, the color CCD 30 is used as the image pickup means and the color liquid crystal panel 40 is used as the display means, but the monochrome CCD 30 'is used instead of the color CCD 30 and the color liquid crystal panel 40 is used instead of the color liquid crystal panel 40. A monochrome liquid crystal panel 40 'may be used. In this case, a UV cut filter 32 is mounted on the monochrome CCD 30 'image receiving surface. This is because the UV cut filter 32 can remove the fog due to the reflection of the ultraviolet rays from the bill 80, and can increase the contrast. When the monochrome CCD 30 'is used, a circuit for trapping a color signal (chroma signal) in the video circuit 70 is unnecessary. Further, an LED may be used as the light source of the backlight unit 61 when the monochrome liquid crystal panel 40 'is used.

A color liquid crystal panel 4 is used as display means.
0 is used, but instead of the color liquid crystal panel 40, a CRT, a plasma display, an ELD (electrolum
inescent display) may be used.

Although an external AC power supply is used as a power supply, a dry battery or a rechargeable (secondary) battery may be used.

[0036]

As described above in detail, the counterfeit discriminating apparatus according to the present invention can be used to switch between an infrared light source and an ultraviolet light source to change the design in response to infrared rays. And any of the objects to be distinguished, which change the design in response to ultraviolet rays, can be distinguished.

Further, since the light source, the image pickup means, and the like are provided inside the light-shielding casing, the discriminating operation can be performed in a light place.

Furthermore, when infrared rays and ultraviolet rays are irradiated from both the infrared irradiation light source and the ultraviolet irradiation light source, either of the discrimination object whose design is changed by the irradiation of infrared light and the discrimination object whose pattern is changed by the irradiation of ultraviolet light is discriminated. Can also be done.

Furthermore, since the light source is disposed in the light-shielding housing and the object to be identified is in close contact with the window, invisible light hardly leaks outside the light-shielding housing. Therefore, invisible light (particularly, ultraviolet light) does not adversely affect the human body.

Furthermore, the counterfeit discriminating apparatus of the present invention is compact and lightweight, so it is highly mobile and can be freely moved by grasping it with the palm.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a counterfeit discriminating apparatus according to the present embodiment.

FIG. 2 is a side sectional view of the counterfeit discriminating apparatus according to the embodiment.

FIG. 3 is a conceptual diagram showing a use state of the counterfeit discriminating apparatus of the present embodiment.

FIG. 4 is a diagram illustrating a display example of a color liquid crystal panel.

FIG. 5 is a side sectional view showing a modification of the present embodiment.

[Description of Signs] 10 ... Infrared LED, 11, 21 ... Support member, 20 ... UV
Lamp, 30: color CCD, 31: optical low-pass filter, 32: UV cut filter, 40: color liquid crystal panel, 50: light shielding case, 51: display window, 52: reading window, 60: imaging lens, 61: backlight unit,
62: brightness adjustment volume, 63: power supply connector, 64
... power switch, 70 ... video circuit, 71 ... inverter for UV lamp, 80-82 ... banknote, 90 ... straight line.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Taku Inoue 1-3-1, Shimoteno, Himeji City, Hyogo Prefecture Inside Glorry Industry Co., Ltd. (72) Inventor Toru Nakajima 1-3-1, Shimoteno, Himeji City, Hyogo Prefecture No. Glory Industry Co., Ltd. (72) Inventor Hiroyuki Shimada 1-3-1, Shimoteno, Himeji City, Hyogo Prefecture Inside Growley Industry Co., Ltd. (72) Hiroyuki Sakaguchi 1-3-1, Shimoteno, Himeji City, Hyogo Prefecture (56) References JP-A-59-177690 (JP, A) JP-A-4-106692 (JP, A) JK-57-20073 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) G07D 7/12

Claims (5)

(57) [Claims] 1. A counterfeit discriminating apparatus that is placed on a discrimination target and visually discriminates counterfeit discrimination, wherein the lower plane is a surface that is brought into close contact with the discrimination target, and the upper plane is substantially parallel to the lower plane. A light-blocking housing having: a window provided on a lower flat surface of the light-blocking housing; a light source disposed in the light-blocking housing to irradiate invisible light toward the window; Imaging means arranged in a transparent housing for capturing an image of the object to be distinguished through the window, and provided on an upper flat surface of the light-shielding housing and having a display surface outside the housing and imaged by the imaging means Display means for displaying a forged image. 2. The forgery discriminating apparatus according to claim 1, wherein the light source is an infrared irradiation light source or an ultraviolet irradiation light source. 3. The forgery discriminating apparatus according to claim 1, wherein the light source is an infrared light source and an ultraviolet light source, and one or both of the light sources emits invisible light. 4. A display device according to claim 1, wherein the lower plane is substantially perpendicular to a straight line connecting a center of gravity of a plane surrounded by the outline of the window and a center of gravity of a display surface of the display means. The vertical direction and the horizontal direction of the image to be detected coincide with the direction of the object to be discriminated, and the image of the object to be discriminated displayed on the display means is substantially the original size. Item 4. The counterfeit discriminating apparatus according to any one of Items 3. 5. The forgery discriminating apparatus according to claim 1, wherein said display means is a liquid crystal display device.