JP4759467B2 - Shading cover in biometric authentication device - Google Patents

Description

  The present invention relates to a biometric authentication apparatus that performs identity verification using biometric authentication, and particularly relates to a technique suitable for acquisition and maintenance of biometric images.

  In recent years, in transactions using an automated teller machine (ATM), crimes that have been used to steal cash from a bank account have been rapidly increased by someone else impersonating the owner of the cash card using a stolen PIN and cash card. Yes. Increasingly, each financial institution revises the method of identity verification and performs identity verification based on the biometric information unique to the person who is not stolen. Among various biometric authentication methods, vein authentication is attracting attention as a highly accurate method.

  As the vein authentication technique, Patent Document 1 discloses a finger authentication device, and the finger authentication device further includes an external light shielding unit. The external light shielding unit serves to shield external light entering the imaging unit, is provided symmetrically on the right and left of the guide unit, and has a length along the outer shape of the authentication target outer finger and has a concave shape on the entire length. Moreover, both are longer than the length and height of the finger, and the tip is lowered with a curve.

JP 2005-128936 A

  When a biometric authentication device is installed in an ATM such as a financial institution, it is often installed on the same plane as the touch panel. In many cases, the touch panel has a configuration provided on a table protruding from the ATM to the user side. In view of this, Patent Document 1 has the following problems.

  For example, Patent Document 1 is applied to ATM. When performing maintenance on the lower part of the table inside the ATM, if the table is lifted to expose the lower part of the table, the external light shielding part of Patent Document 1 may collide with the ATM and damage both.

  An object of the present invention is to provide a light-shielding cover that can reliably block outside light when a living body is imaged by a camera and does not damage each part during ATM maintenance work.

  The distance from the contact point between the light shielding cover on the side of the finger and the upper surface of the lower part of the biometric authentication device to the point corresponding to the highest position on the light shielding cover is the upper surface of the light shielding cover on the opposite side of the finger The biometric authentication device is provided with a light shielding cover that is longer than the distance from the contact to the point corresponding to the lowest position of the light shielding cover.

  Providing a light-shielding cover having a shape that does not damage the ATM body even when the ATM opening / closing part is opened for maintenance work, there is an effect of improving the accuracy of biometric authentication and maintenance work.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Preferred embodiments of the invention will be described below in detail with reference to the drawings. In addition, these show one Example of this invention, and do not restrict | limit the function of a structure, a structure, etc.

  FIG. 1 shows an automatic teller machine (hereinafter referred to as ATM) equipped with a biometric authentication device, which is an enlarged view of the vicinity of the biometric authentication device when a user normally uses it. FIG. 2 is a block diagram of an ATM equipped with a biometric authentication device. Each structure of ATM is demonstrated using FIG.

  The outer surface of the side operated by the user of the ATM 100 (the front side of the ATM 100) is constituted by a front panel. The front panel is divided into, for example, an upper front panel 107, a middle front panel 108, and a lower front panel 109 from the upper stage to the lower stage. The upper front panel 107 and the lower front panel 109 are configured to face the user substantially perpendicularly. On the other hand, the middle front panel 108 is inclined from the part in contact with the upper front panel 107 toward the back, and has a so-called hollow structure.

  The ATM 100 has a table between the middle front panel 108 and the lower front panel 109 that is substantially parallel (horizontal) to the installation surface of the ATM 100. As will be described later, this table can be opened up and down at the time of maintenance work. A banknote deposit / withdrawal port 105 through which a user deposits / withdraws banknotes and a coin deposit / withdrawal port 106 through which coins are deposited / withdrawn are installed behind the opening / closing unit 101. In addition, the opening / closing unit 101 is provided with a display input unit 102 and a biometric authentication device 103 at the top.

  The ATM 100 controls the control unit 200 that controls the entire ATM, the main storage unit 201 that stores information such as various data and programs, the card insertion / ejection operation, the magnetic stripe of the card, or the data stored in the IC card. Card mechanism 202 having functions such as reading and writing and image reading of the card embossed part, storing bills, authenticating the bills by the discrimination unit, and transporting from the storage box to the banknote deposit / withdrawal port 105, storing the coins And a coin mechanism unit 204 that performs authenticity discrimination by the discrimination unit and conveys it from the storage box to the coin deposit / withdrawal port 106.

  The display input unit 102 displays operation guidance to the user and accepts input from the user, and includes a touch panel. The biometric authentication device 103 is a device that performs identity verification using biometric information, and includes a light shielding cover 104. The light shielding cover 104 is attached to prevent inaccurate images to be acquired due to light such as sunlight or fluorescent light entering when taking an image of a finger.

  The biometric authentication device 103 provided with the light-shielding cover 104 has a high security effect when used for identity verification in the ATM 100. Next, the transaction using the biometric authentication device 103 at the ATM 100 will be described. The main body of the operation in the following description is the control unit 200.

  The control unit 200 displays transaction selection guidance such as payment, payment, balance inquiry, and transfer on the display input unit 102, and accepts transaction selection from the user. Here, when the “payment key” or the like of the display input unit 102 is pressed, a guidance to insert the IC card is displayed on the display input unit 102 to prompt the user to insert the IC card. On the other hand, when a user inserts an IC card into the card mechanism unit 202, the control unit 200 detects this and reads information such as biometric information and account number stored in the IC card by the card mechanism unit 202.

  Next, a guidance to input the personal identification number is displayed on the display input unit 102. When the personal identification number is input to the display input unit 102 by the user, the control unit 200 detects this and inputs the read account number. The password is sent to the financial institution host computer. On the other hand, the financial institution host computer receives the personal identification number transmitted from the ATM 100, collates the inputted personal identification number with the personal identification number corresponding to the account number registered in advance, and displays the collation result in the ATM 100. Send to. The control unit 200 receives the collation result, checks whether the password is correct, and proceeds to the next biometric authentication process if the input password is correct. Here, if the identity verification is successful by biometric authentication, the control unit 200 of the ATM 100 executes a transaction desired by the user. That is, at the time of a payment transaction, the bill / coin of the amount desired by the user is withdrawn from the bill mechanism unit 203 and the coin mechanism unit 204.

  As a configuration of the biometric authentication device 103 used in this biometric authentication processing, an external perspective view (FIG. 3) of the biometric authentication device 103 and a cross-sectional view (FIG. 4) of the biometric authentication device 103 are shown.

  As illustrated in FIG. 3, the biometric authentication device 103 includes a light source unit 301 configured by an LED or the like that irradiates a living body with near-infrared light, an interference filter 302 having optical transparency only for an arbitrary wavelength, and an interference filter 302. An imaging unit 401 configured with a camera or the like that images transmitted light that has been transmitted through the interference filter 302, and a light-shielding cover 104 that prevents intrusion of external light when imaging near-infrared light with the imaging unit 401 It is equipped with.

  As shown in FIG. 4, the biometric authentication device 103 has an internal structure in which a plurality of light source units 301 are mounted in a row in a pair of light source mounting units on the left and right sides of the finger 400. . The light source unit 301 irradiates near infrared light directly to the finger 400. Specifically, as shown in FIG. 3, the light source is irradiated from the first joint in the longitudinal direction of the finger 400 to the second joint. The light source unit 301 is located at a height equivalent to the center height of the finger 400, and the irradiated near-infrared light exits the finger 400 while being reflected inside the finger 400. That is, a plurality of light source units 301 are arranged in a line on the insulating substrate, and are arranged at equal intervals corresponding to at least the first joint and the second joint of the finger 400.

  The control unit 200 causes the imaging unit 401 to image light that has exited from the belly side of the finger 400 and transmitted through the interference filter 302 (light in the downward direction in FIG. 4). The interference filter 302 transmits only near-infrared light having an arbitrary wavelength among transmitted light emitted from the ventral side of the finger 400 when the transmitted light irradiated from the light source unit 301 is diffusely reflected inside the finger 400. Since near infrared rays are easily absorbed by hemoglobin in the blood, the veins are dark and the other veins are brightly imaged. The hemoglobin present in the blood absorbs near-infrared rays, so that the blood vessels appear dark, and other than the blood vessels appear bright. The control unit synthesizes the captured data as finger vein image data.

  The vein image data of the finger 400 obtained through the left and right pair of LED irradiations is edited to obtain a feature amount from one piece of vein image data. Then, the feature amount is collated with registered data registered in advance. The registered data is stored in the IC card owned by the user or in the host computer of the financial institution, and the identity verification is performed even when the control unit 200 receives the registered data and collates it with the imaging data. The collation result is displayed on the display input unit 102 of the ATM 100 while being connected by the external connection connector.

  When the imaging unit 401 captures light that has exited from the ventral side of the finger 400 and transmitted through the interference filter 302 (light in the downward direction in the figure), if the external light such as illumination enters, the finger is accurate. The vein image data cannot be obtained. As a method for preventing this, it is conceivable to provide the biometric authentication device 103 with the light shielding cover 104 and set the height of the light shielding cover 104 higher than the finger 400. However, there are the following problems. Even when the biometric authentication device 103 is installed on the opening / closing unit 101 (table) having the display input unit 102 (touch panel) of the ATM 100, the ATM 100 and the light shielding cover 104 are also used when the opening / closing unit 101 is lifted for maintenance work. There is a risk of hitting and damaging both parties. Therefore, the rear part of the light shielding cover 104 is designed to be lower than the front part.

  The biometric authentication device 103 is divided into a lower part provided with the imaging unit 401 and an upper part provided with the light source unit 301 (see FIG. 4), and a light shielding cover 104 is installed on the upper surface of the lower part as shown in FIG. .

  An example of the design of the light shielding cover 104 suitable for improving the accuracy of biometric authentication and the efficiency of maintenance work will be described with reference to FIG. The light shielding covers 104a and 104b are installed at positions facing each other across the position where the finger 400 is held over. Of these, paying attention to 104 a, the contact between the light shielding cover 104 on the side where the finger 400 is held (the front side in FIG. 5) and the lower upper surface of the biometric authentication device 103 is A, and the middle front panel 108 when installed in the ATM 100 as shown in FIG. Let B be the contact point between the light shielding cover 104a on the side close to (the back side in FIG. 5) and the lower upper surface of the biometric authentication device 103. Further, the point corresponding to the highest position in the light shielding cover 104a is defined as E, and the point corresponding to the lowest position in the light shielding cover 104a is defined as F. Similarly, paying attention to 104b, the contact between the light shielding cover 104b on the side where the finger 400 is held (the front side in FIG. 5) and the lower upper surface of the biometric authentication device 103 is C, and when the center front panel is installed in the ATM 100 as shown in FIG. A contact point D between the light-shielding cover 104b on the side close to 108 (that is, the side opposite to the side on which the finger is held, the back side in FIG. 5) and the lower upper surface of the biometric authentication device 103 is in an invisible position in FIG. And In this case, the distance between AB is approximately 70 mm (L1 in FIG. 5), the distance between AC is approximately 50 mm (L2 in FIG. 5), the distance between AEs is approximately 30 mm (H1 in FIG. 5), and the distance between BF is approximately 15 mm (H2 in FIG. 5). It is. These numerical values are calculated based on the inclination of the middle front panel 108 of the ATM 100, and are set to appropriate numerical values that do not cause damage to both the ATM 100 and the light shielding cover 104 during maintenance work.

  Here, the near side of the light shielding cover 104 in FIG. 5 is defined as “the side where the finger is held”, and the far side in FIG. 5 is defined as “the side opposite to the side where the finger is held”, but the near side in FIG. The “side on which the finger base is placed” and the back side in FIG. 5 can also be defined as “the side on which the fingertip is placed”.

  With reference to FIGS. 6 and 7, the biometric authentication apparatus 103 provided with the light shielding cover 104 in the ATM 100 will be described for normal use (when a user performs a transaction operation) and when an attendant performs maintenance work. 6 is a side view of FIG. 1, and FIG. 7 is a side view of the ATM 100 on which the biometric authentication device 103 is mounted for maintenance work.

  As shown in FIG. 6, the biometric authentication device 103 is installed on the opening / closing unit 101, and there is a depression in the middle front panel 108 of the ATM 100 as described with reference to FIGS. Below the opening / closing part 101 is a unit 600 having a bill mechanism part 203 and a coin mechanism part 204.

  When a failure occurs in the unit 600, as shown in FIG. 7, the clerk opens the opening / closing part 101, lifts it upward, puts the hand in the unit 600, and performs maintenance work. The maintenance work refers to periodic maintenance, repair of unexpected failure, and the like, and the bill conveyance test in the unit 600 and the operation check of the biometric authentication device 103 and the card mechanism unit 202 are performed.

  The opening / closing part 101 can be opened by several tens of degrees around the contact point between the middle front panel 108 and the opening / closing part 101. However, if the opening / closing part 101 is opened carelessly, the shading cover 104 and the middle front panel are opened. Since 108 may collide and damage both sides, the opening angle of the opening / closing part 101 is regulated so as not to collide. However, if the angle is too small (the opening / closing part is not opened too much), it becomes difficult to perform internal maintenance work. Therefore, the light shielding cover 104 of the present embodiment has a rear portion, that is, a height close to the front panel, which has a significant feature.

  That is, the distance AE from the contact point A between the light shielding cover 104 on the side where the finger 400 is held and the lower upper surface of the biometric authentication device 103 to the point E which is the highest position in the light shielding cover 104 is set on the middle front panel 108 when the ATM 101 is installed. It is longer than the distance BF from the contact point B between the light shielding cover 104 on the near side and the lower upper surface of the biometric authentication device 103 to the point F corresponding to the lowest position on the light shielding cover 104.

  Therefore, by providing the light-shielding cover 104 having a shape that does not damage the ATM body even when the opening / closing part 101 is opened for maintenance work, the accuracy of biometric authentication and the efficiency of maintenance work are improved.

  In the above-described example, the structure of the light shielding cover 104 itself has been described as a feature. However, the use of elastic rubber as the material of the light shielding cover 104 causes a problem that both the light shielding cover 104 and the middle front panel 108 are damaged. It becomes difficult. That is, the light shielding cover 104 is made of rubber, so that damage can be suppressed even if a collision occurs.

  In the second embodiment, a biometric authentication device 103 in which a near-infrared light cut film 801 is installed on the light shielding cover 104 of the first embodiment will be described. As shown in FIGS. 8A and 8B, near-infrared light can be blocked by installing a semi-transparent near-infrared light cut film 801 on the upper part of the symmetrical light-shielding cover 104. That is, since the finger vein is imaged using near infrared light as described above, the near-infrared light irradiated from the outside is cut by the near-infrared light cut film 801, so that a highly accurate vein image is obtained. Can be obtained. In addition, the near-infrared light cut film 801 is translucent, which is convenient because the user can see the position where the finger 400 is held over. 8A is a biometric authentication device 103 (or a light shielding cover) viewed from the user side holding the finger, and FIG. 8B is the biometric authentication device 103 viewed from the middle front panel 108 side when installed in the ATM 100. The near-infrared light cut film 801 is not installed at the front end portion of the light shielding cover 104 on the middle front panel 108 side (the portion without the cut film shown). As a result, when the user holds the finger 400 over the biometric authentication device 103, the user has a feeling of opening as much as the tip is open, so that the user can perform biometric authentication with peace of mind.

  Further, as shown in FIG. 8, the light shielding cover 104 installed in the biometric authentication device includes a pair of side plates (see FIGS. 1, 3 and the like) spaced apart from the side surface of the user's finger and an upper portion thereof. And a near-infrared light cut film 801 disposed in a single body. Therefore, the side plate can also be called a side plate portion, and the upper portion (near infrared light cut film 801) can also be called a ceiling portion.

  In the first embodiment, the two light shielding covers 104 are opposed to each other. However, as in the second embodiment, the side close to the middle front panel 108 may be shaped like a U-shape. Further, the dimensions of the light shielding cover 104 are preferably those described with reference to FIG.

  The light shielding cover 104 and the near infrared light cut film 801 are configured to be removable. When the image of the finger 400 is acquired, if there is dust or dirt, an accurate image cannot be acquired, and the biometric authentication device 103 can be cleaned by removing it.

  The material of the light shielding cover 104 is made of black polycarbonate, so that the amount of light entering from the side surface including near infrared light can be reduced to almost zero. Thereby, the image of biometric authentication can be acquired precisely and the error at the time of authentication can be suppressed to the minimum.

  FIG. 16 shows another aspect of the second embodiment. The shape is almost the same as in Example 2, but the material is different. The entire light shielding cover 104 is composed of a translucent near-infrared light cut film 801. Therefore, the user can perform biometric authentication while looking at his / her finger 400.

  In the first embodiment, the description has been given of the light shielding cover 104 in which the height of the front and rear portions is changed so as not to be an obstacle during the maintenance work. However, as another embodiment, a method of putting the light shielding cover 104 outside the biometric authentication device 103 only at the time of authentication. There is also. That is, when biometric authentication is not performed, the light shielding cover 104 is stored in the biometric authentication device 103. Further, when the light shielding cover 104 is large and does not fit in the biometric authentication device 103, it may be stored not only in the biometric authentication device 103 but also in the ATM 100. And it drives to the exterior of the biometrics authentication apparatus 103 from the light shielding cover 104 with the drive part 1002 mentioned later. With this configuration, the light shielding cover 104 can be designed freely as the shape of the light shielding cover 104 does not cause the ATM 100 and the light shielding cover 104 to collide with the biometric authentication device 103 and cause damage to the biometric authentication device 103 during maintenance work. Become.

  FIG. 9 is an enlarged view of a part of the automatic installation type light shielding cover 104. A lower portion of the light shielding cover 104 is provided with a base portion 901 whose one side surface is shaped like a gear having a tooth shape. The biometric authentication device 103 includes a gear 902 having a toothed outer periphery, a stopper 903 having a shape protruding at one end of the base portion 901, an upper sensor 904 for detecting the position of the stopper 903, and a lower sensor on the lower side. 905. When the gear 902 is driven (rotated), the gear 902 and the base 901 are engaged with each other so that the light shielding cover 104 moves up and down. For example, in FIG. 9, when the gear 902 rotates clockwise, the light shielding cover 104 moves downward, and when the gear 902 rotates counterclockwise, the light shielding cover 104 moves upward.

  FIG. 10 is a block diagram of the biometric authentication device 103 when the light shielding cover 104 is automatically installed. In addition, about the structure of ATM100, the display input part 102, the main memory part 201, the card | curd mechanism part 202, the banknote mechanism part 203, and the coin mechanism part 204 which were demonstrated in FIG. The biometric authentication device 103 includes a control unit 1001 that controls the biometric authentication device 103 as a whole, a drive unit 1002 that rotates the gear 902 to drive the light shielding cover 104, and a sensor that detects that the finger 400 is held over. A detection unit 1003, a light source unit 301, an imaging unit 401, and an I / O device 1004 that is an interface for connecting to the ATM 100. Since the I / O device 1004 is connected to the I / O device 1005 on the ATM 100 side, it is possible to cause the control unit 200 of the ATM 100 to drive the light shielding cover 104.

  FIG. 11 shows a flowchart of authentication when the light shielding cover 104 is an automatic installation type.

  The control unit 1001 detects that an object is held over the biometric authentication device 103 by the detection unit 1003 (S1101). After step 1101, it is checked whether the object is a living body (S1102). If it is not a living body, it is checked whether the set time has elapsed (S1103). If the set time has not elapsed, the process returns to step 1101 again. On the other hand, if the set time has elapsed, the authentication is stopped (S1104).

  If the object is a living body in step 1102, the light shielding cover 104 is driven upward from the storage unit 906 by the driving unit 1002 (S1105). When the upper sensor 903 recognizes that the light shielding cover 104 has been installed at a predetermined location, the finger vein image data starts to be acquired by applying near infrared light from the light source 301 to the finger 400 (S1106). Then, a comparison (biometric authentication process) between the acquired image and the previously registered image is performed (S1107). When the biometric authentication process is completed, the light shielding cover 104 is driven downward by the driving unit 1002 and stored in the storage unit 906 (S1108). This completes the authentication process when the light shielding cover 104 is of the automatic installation type.

  Note that the set time indicates that the light shielding cover 104 protrudes to the outside of the biometric authentication device 103 when there is a user who has indicated that he / she intends to perform biometric authentication by the input unit but has stopped in the middle. This is a rough time for automatic storage.

  12 and 13 are cross-sectional views when AA ′ of the upper sensor described in FIG. 9 is viewed from above. The upper sensor 904 and the lower sensor 905 have the same configuration and detect the position of the stopper 903 with the same mechanism. A light emitting diode 1201 is provided on one side, and a light receiving unit 1202 is provided on the other side. While the biometric authentication device 103 is powered on, light is always incident on the light receiving unit 1202 from the light emitting diode 1201. When the light shielding cover 104 moves to the installation location of the upper sensor 904 by the action of the driving unit 1002, the light from the light emitting diode 1201 is blocked by the stopper 903 and does not reach the light receiving unit.

  First, attention is paid to the function of the upper sensor 904. Since the light shielding cover 104 is stored in the storage unit 906 until the finger 400 is detected by the detection unit 1003, the light receiving unit 1202 continues to receive light from the light emitting diode 1201 as shown in FIG. When the light shielding cover 104 moves upward by the rotation of the gear 902, the stopper 903 enters between the light emitting diode 1201 and the light receiving unit 1202 as shown in FIG. Then, the light receiving unit 1202 does not receive light from the light emitting diode 1201.

  Next, let us focus on the function of the lower sensor 905. Since the light shielding cover 104 is stored in the storage unit 906 until the finger 400 is detected by the detection unit 1003, the light receiving unit 1202 does not receive light from the light emitting diode 1201 as shown in FIG. When the light shielding cover 104 is moved upward by the rotation of the gear 902, the stopper 903 does not exist between the light emitting diode 1201 and the light receiving unit 1202 as shown in FIG. 12, and the light receiving unit 1202 transmits the light from the light emitting diode 1201. Continue to receive. When the biometric authentication process ends, the light shielding cover 104 moves downward, so that the stopper 903 enters between the light emitting diode 1201 and the light receiving unit 1202 as shown in FIG. Does not receive light.

  As described above, the control unit 1001 can recognize whether the light shielding cover 104 is stored in the storage unit 906 or installed outside.

  FIG. 14 shows a case where the storage unit 906 of the arch-shaped shading cover 104 is provided in the biometric authentication device 103, and a configuration similar to that of FIG. 9 is applied to the arch-type (see FIG. 15). When performing biometric authentication, the driving unit 1002 drives the light shielding cover 104 so that the light shielding cover 104 protrudes from the storage unit 906 to the outside of the biometric authentication device, and is installed so as to cover a portion where the finger 400 is held from both left and right directions. .

  Therefore, by providing the light shielding cover 104 that is automatically installed based on the finger 400 being held in this way, the ATM 100 main body is not damaged even when the opening / closing portion 101 of the ATM 100 is opened for maintenance work. It has the effect of improving the accuracy of biometric authentication and the efficiency of maintenance work.

  In the fourth embodiment, other embodiments will be described with respect to the light shielding cover 104 described in the first to third embodiments. The internal configuration of the biometric authentication device 103 shown in FIGS. 17 to 21 described later is the same as that of the first to third embodiments.

  FIG. 17 is an external perspective view of the biometric authentication device 103 including the light shielding cover 104 (see FIG. 8) to which the near infrared light cut film 801 has been attached. As shown in the figure, the light shielding cover 104 is attached to the biometric authentication device 103 in a stable shape with no gap. If a protrusion is provided on one of the biometric authentication device 103 and the light shielding cover 104 and a fitting portion for fitting the protrusion is provided on the other, a more stable configuration when the biometric authentication device 103 and the light shielding cover 104 are combined. It is possible to The near-infrared light cut film 801 shown in this example may be called a ceiling part as described in the second embodiment.

  FIG. 18 is a cross-sectional view of the biometric authentication device 103 including the light shielding cover 104 to which the near infrared light cut film 801 is attached. In FIG. 8 described above, it has been described that the near infrared light cut film 801 (ceiling portion) is disposed on the upper surface of the user's finger, that is, the position facing the imaging unit 401 of the biometric authentication device 103. In order to improve the accuracy of acquiring finger veins, the following various features are provided.

  As shown by the arrow (1), the near-infrared light cut film 801 (ceiling part) is appropriately rounded. As described in the process of acquiring the finger vein of the user by the biometric authentication device 103, the finger 400 is irradiated with near-infrared light from the pair of left and right light sources 301 and is imaged by the imaging unit 401. Get finger veins at. At this time, the near-infrared light emitted from the light source unit 301 is emitted not only to the finger 400 but also to the ceiling as indicated by the arrow (2). In order to prevent such infrared light reflected from the ceiling part from being captured by the imaging unit 401 and entering a captured image of the finger vein, the ceiling part has a rounded structure. In the figure, among the near-infrared light irradiated from the light source unit 301 in various directions, the reflected light of the near-infrared light irradiated toward the near-infrared light cut film 801 obstructs the photographing by the imaging unit 401. It shows that it goes to the direction which does not become (dotted arrow (2)).

  As shown in FIG. 20, an appropriate roundness is optimally an arc having a diameter of 100 mm (the circle represented by a dotted line in FIG. 20 is a circle having a diameter of 100 mm). If the roundness is too large or too small, the effect of preventing reflected light from entering the image cannot be exhibited. Therefore, it is preferable to design with an arc having a diameter of 90 to 110 mm.

  The side plate portion of the light shielding cover 104 employs a structure having an inclination as indicated by an arrow (3). In other words, the side plate portion is configured to face left and right across the imaging position (finger) by the imaging unit 401, and the facing width widens upward. Although the imaging unit 401 has an angle of view as indicated by a dotted line, since the light shielding cover 104 has the above-described configuration, the light shielding cover 104 itself can be prevented from entering the angle of view of the imaging unit 401. .

  As shown in FIG. 20, it is suitable that the angle R1 formed by the side plate portion and a line (indicated by a dotted line in the figure) extending in the vertical direction from the installation surface of the biometric authentication device 103 is about 13 degrees. . This angle R1 may be adjusted to the angle of view plus 1 to 5 degrees in accordance with the angle of view of the imaging unit 401. For example, if the angle of view is 12 degrees, the angle R1 is 13 to 17 degrees.

  In addition, when acquiring a biometric image, there is a risk that shooting may be hindered if there is dust at the imaging position, and cleaning must be done frequently. However, since there is a near-infrared light cut film 801, it is difficult to clean. There is. In order to solve this problem, a configuration in which the near-infrared light cut film 801 (ceiling part) can be easily removed from the light shielding cover 104 as shown in FIG. Thereby, the operation | work at the time of cleaning becomes easy and the convenience improves.

  Further, when FIG. 4 is compared with FIGS. 18 and 19, the interference filter 302 is larger in FIGS. 18 and 19, the image pickup unit 401 is shown in a lower position than in FIG. 4, and the interference filter 302 is enlarged to cover the image pickup region of the image pickup unit 401. In this way, the interference filter 302 may be installed with a size changed according to the imaging region of the imaging unit 401.

  Further, as shown in FIG. 21, the light shielding cover 104 is provided with an opening at the fingertip portion. The shape of the light shielding cover 104 is the same as that described in the first embodiment. The light shielding cover 104 is configured such that the side on which the finger 400 is held (finger insertion opening) is higher than the opposite side (fingertip installation portion). (See arrow). In addition, an opening is provided in the fingertip installation portion. Thereby, even when a person with long nails uses, the nails do not have to hit the biometric authentication device 103 or the light shielding cover 104. Note that an angle R2 formed by a line connecting the highest point on the opposite side to the side where the finger 400 of the light shielding cover 104 is held and an installation surface (indicated by a dotted line in the drawing) of the biometric authentication device 103 is about 15 degrees. Good to do. This angle depends on the structure of the front panel of the ATM 100 to be installed, and may be appropriately changed according to the depression of the front panel of the ATM 100.

Example of external view when user normally uses ATM equipped with biometric authentication device Example block diagram of an ATM equipped with a biometric authentication device Example of external perspective view of biometric authentication device Example of a cross-sectional view of a biometric authentication device Example of biometric device design Example of a side view when a user normally uses an ATM equipped with a biometric authentication device Example of a side view when an attendant performs maintenance work on an ATM equipped with a biometric authentication device Example of external view when a near infrared light cut film is installed on the light shielding cover Example of a cross-sectional view of a biometric authentication device when the shading cover is automatically installed Example of a block diagram of a biometric authentication device when the shading cover is automatically installed Example of flowchart for automatic installation type shading cover Example of cross section of upper (lower) sensor Example of cross section of upper (lower) sensor Other examples of external view of biometric authentication device when light-shielding cover is automatically installed Other examples of cross-sectional view of biometric authentication device when light-shielding cover is automatically installed Other examples of external view when a near infrared light cut film is installed on the light shielding cover Example of an external perspective view of a biometric authentication device provided with a light shielding cover with a near infrared light cut film attached Example of a cross-sectional view of a biometric authentication device having a light-shielding cover with a near-infrared light cut film attached Example of a cross-sectional view of a biometric authentication device that can remove a near-infrared light cut film Shading cover design example Example of a light-shielding cover with an opening

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... ATM, 101 ... Opening / closing part, 102 ... Display input part, 103 ... Biometric authentication apparatus, 104 ... Shading cover, 105 ... Banknote depositing / dispensing port, 106 ... Coin depositing / dispensing port, 107 ... Upper front panel, 108 ... Middle front Panel 109 Lower front panel 200 Control unit 201 Main storage unit 202 Card mechanism unit 203 Bill mechanism unit 204 Coin mechanism unit 301 Light source unit 302 Interference filter 400 Finger , 401 ... Imaging unit, 600 ... Unit, 801 ... Near infrared cut film, 901 ... Base part, 902 ... Gear, 903 ... Stopper, 904 ... Upper sensor, 905 ... Lower sensor, 906 ... Storage part, 1001 ... Control part, DESCRIPTION OF SYMBOLS 1002 ... Drive part, 1003 ... Detection part, 1004 ... I / O device (biometric authentication apparatus), 1005 ... I / O device (ATM), 1201 ... Light diode, 1202 ... light-receiving unit

Claims (8)

  In a biometric authentication device that performs biometric authentication processing,
  A light source unit that emits light from the side to the finger;
  An interference filter having optical transparency for an arbitrary wavelength of light;
  An imaging unit that is disposed under the interference filter and images transmitted light that has passed through the interference filter;
  A light-shielding cover that blocks external light entering the imaging unit;
  A drive unit for driving the light shielding cover;
  A storage unit that is inside the biometric authentication device and stores the light shielding cover;
  A detection unit for detecting that a finger is held over the imaging unit;
  And a control unit that controls to drive the light shielding cover to protrude from the storage unit to the outside of the biometric authentication device using the driving unit based on the finger being held by the detection unit. A biometric authentication device. The biometric authentication device according to claim 1,
The biometric authentication device, wherein after the biometric authentication is completed, the control unit controls to drive the light shielding cover from the outside of the biometric authentication device into the storage unit using the drive unit. The biometric authentication device according to claim 1 or 2,
A sensor for detecting the light shielding cover;
The said control part stops the drive of the said drive part, when the said sensor detects the position of the said light shielding cover, The biometrics authentication apparatus characterized by the above-mentioned.   The biometric authentication device according to claim 3.
  The sensor includes a first sensor that detects a position of the light shielding cover during biometric authentication, and a second sensor that detects a position of the light shielding cover other than during biometric authentication,
  The control unit uses the driving unit to drive the light shielding cover so as to protrude from the storage unit to the outside of the biometric authentication device, and then the first sensor detects the light shielding cover, thereby A biometric authentication device, wherein driving of the driving unit is stopped.   The biometric authentication device according to claim 4, wherein
  The control unit drives the light shielding cover to be stored in the storage unit from the outside of the biometric authentication device using the driving unit, and then the second sensor detects the light shielding cover, thereby A biometric authentication device, wherein driving of the driving unit is stopped.   The biometric authentication device according to any one of claims 3 to 5,
  The biometric authentication device, wherein the sensor detects the light shielding cover by detecting a protrusion provided on the light shielding cover.   In the biometric authentication device according to any one of claims 1 to 6,
  A biometric authentication device comprising the light shielding cover facing left and right across an imaging position of the imaging unit.   In an automated teller machine that handles money transactions,
  The automatic cash transaction apparatus provided with the biometrics apparatus in any one of Claims 1-7.

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