KR100760033B1 - Personal authentication device - Google Patents

Abstract

In the personal authentication device using the blood vessel pattern, in particular, a device capable of miniaturization of the device is provided. The personal authentication device has a light receiving element string comprising an infrared light source and a plurality of light receiving elements. At the time of authentication, a finger is scanned on the light receiving element string. An image including a two-dimensional blood vessel pattern of a finger is generated from the output of the light receiving element string and the displacement information by the scanning. Personal authentication is performed by matching the blood vessel pattern thus obtained and the pattern registered in advance. The device can be miniaturized and it is easy to mount it in a place where a space for mounting a car, a mobile phone, or the like is limited.

Description

Personal Authentication Device {PERSONAL IDENTIFICATION DEVICE}

The present invention relates to a personal authentication device for authenticating an individual using biometric information, and more particularly, to a personal authentication device for authenticating an individual based on a blood vessel pattern of a finger.

There is a growing expectation for personal authentication technologies for the purpose of safe management of property or information. In particular, the biometric authentication technology using a part of the human body as a key has attracted attention because there is less concern about fraudulent events due to loss or theft, compared to the conventional method of using a password number or an encryption key. As biometric authentication techniques, various methods using fingerprints, faces, irises, blood vessel patterns of hands and fingers, and the like have been studied. Among them, the authentication method using the blood vessel pattern of the finger has little psychological resistance because it does not resemble a crime like a fingerprint and does not directly irradiate light to the eye like an iris. In addition, there is an advantage that counterfeiting is difficult because it handles the features of the interior, not the surface of the living body.

As an example of an authentication method using a blood vessel pattern of a finger, there is a method disclosed in Japanese Patent Laid-Open No. 2003-30632. In the example of this publication, the light source which emits near-infrared light is prepared, and a camera is installed so that it may substitute. The camera is equipped with an optical filter that passes only wavelengths in the near infrared region. At the time of authentication, an image of a finger is taken by inserting a finger between the camera and the light source. Because the components in the blood absorb near-infrared light well, the blood vessels do not penetrate and dim. In this way, the characteristic of the photographed blood vessel pattern is parameterized, and the personal authentication is performed by contrasting with the parameter registered in advance.

However, in the apparatus disclosed in Japanese Patent Laid-Open No. 2003-30632, it is difficult to miniaturize the apparatus because a lens is provided in the camera to photograph. For example, the lens may be wide-angled, but there are limitations. In addition, when wide-angled, distortion is likely to occur in the image. The position of the finger imaged at the time of registration may differ from the position of the finger imaged at the time of authentication. For example, in the photographing at the time of registration, the finger is placed at the center of the image range. In the imaging at the time of authentication, the image at the time of authentication is distorted when the finger is placed at the end of the image range. Therefore, it is judged that the vascular pattern at the time of authentication is not the same as the vascular pattern at the time of registration.

On the other hand, there is a demand for the personal authentication device to be mounted in a place where a mounting space of a car or a mobile phone is limited.

Accordingly, an object of the present invention is to provide a means for miniaturizing a device in a personal authentication device using biometric information such as blood vessel patterns. Another object is to provide a means for lowering power consumption. It is another object of the present invention to provide a means for reducing the influence of rotation about the central axis of the finger. It is another object of the present invention to provide a means for reducing the effects of dust, dust, and the like on the light receiving element rows to be imaged.

In this invention, in order to achieve the said objective, it set it as the structure shown below schematically.

(1) A light receiving element string including an infrared light source and a plurality of light receiving elements is arranged. The subject, preferably the finger or hand, is scanned relative to the light receiving element train. That is, although the subject may be scanned, the light receiving element string may be scanned. A two-dimensional blood vessel pattern image of a finger or a hand is generated from the output of the light receiving element string and the displacement information by the scanning, thereby performing personal authentication.

(2) A sensor for detecting the presence of a finger or hand is installed to obtain displacement information. Alternatively, a displacement sensor for obtaining displacement information may be provided.

(3) The light receiving element rows may be arranged on a curve.

(4) A mechanism for removing dust and dirt attached to the light receiving element rows by scanning of fingers is arranged.

According to the present invention, since the personal authentication device for authenticating an individual from biometric information such as blood vessel patterns is constituted by an infrared light source and a light receiving element string, the device can be miniaturized and low in power consumption.

1 is a view showing the appearance of a personal authentication device according to the present invention;

2 shows an example of a blood vessel pattern of a finger;

3 is a diagram showing a first configuration example of a personal authentication device according to the present invention;

4 is a diagram showing an example of an infrared light source driving circuit according to the present invention;

5 is an explanatory diagram for explaining light reflected by a finger;

6 is a view showing a first example of a light receiving element string according to the present invention;

7 is a view showing a second example of a light receiving element string according to the present invention;

8 is a flowchart for explaining a personal authentication process in the personal authentication device according to the present invention;

9 is a diagram showing a second configuration example of a personal authentication device according to the present invention;

10 is a diagram showing a third configuration example of a personal authentication device according to the present invention;

11 is an explanatory diagram for explaining the position of the infrared light source of the personal authentication device according to the present invention;

12 is a view showing an appearance of a fourth configuration example of a personal authentication device according to the present invention;

Fig. 13 shows the appearance of a fifth configuration example of the personal authentication device according to the present invention;

14 is an explanatory diagram for explaining the position of the light receiving element string of the personal authentication device according to the present invention;

15 shows a sixth configuration example of a personal authentication device according to the present invention;

16 shows a seventh configuration example of a personal authentication device according to the present invention;

17 is a view showing the appearance of an eighth configuration example of a personal authentication device according to the present invention;

18 is a diagram showing a ninth structural example of a personal authentication apparatus according to the present invention.

※ Explanation of code for main part of drawing

1: Authentication device 3: External input / output line

10: light receiving element string 12: infrared light source

13 signal processing device 14 input and output terminal

15 microcomputer 16: interface circuit

17: power circuit 20: casing

21: hole 22: the ceiling

23: bottom surface portion 31: bottom surface portion

32: frame member 40: support member

41: roof portion 42: bottom surface portion

43: support 200: finger

201: blood vessel pattern

With reference to FIG. 1, the schematic structure of the authentication apparatus 1 using the blood vessel pattern of a finger by this invention is demonstrated. The authentication device 1 has a casing 20 of a substantially rectangular parallelepiped, and a hole 21 for inserting the finger 200 is provided in the front side of the casing. An infrared light source 12 for generating infrared rays is installed in the ceiling 22 inside the casing 20, and the light receiving element string 10 includes light receiving elements arranged in one row on the bottom surface portion 23 of the casing. ) Is arranged. The authentication device 1 also has a signal processing device 13 which processes a signal from the light receiving element string 10 to recognize a blood vessel pattern, and an input / output terminal 14 which communicates information with an external device.

The infrared light source 12 and the light receiving element string 10 are provided near the inlet of the hole 21 in the casing 20 so as to face each other. The light receiving element array 10 is disposed to be orthogonal to the insertion direction of the finger 200. When the tip of the finger 200 is inserted into the hole 21 of the casing 20, infrared light is irradiated onto the surface of the back of the finger 200 from the infrared light source 12. A portion of the infrared light passes through the finger 200 and comes out from the surface of the bottom of the finger and is received by the light receiving element train 10. When the finger 200 is scanned on the light receiving element string 10 and inserted into the hole 21 of the casing 20, the image of the finger by infrared light is obtained by the light receiving element string 10. Since infrared light is absorbed by the blood flowing through the blood vessel, the infrared image obtained by the light-receiving element heat produces a luminance distribution including the shadow caused by the blood vessel.

2 shows an image of a blood vessel pattern obtained by the light receiving element array 10. The relative displacement of the finger with respect to the light receiving element string is taken on the horizontal axis, and the output of the light receiving element string is taken on the vertical axis. As shown, the blood vessel pattern 201 along with the image 202 of the finger is represented by a dark line.

The signal processing device 13 compares the blood vessel pattern obtained by the light receiving element array with the pattern registered in advance, and outputs a matching result via the input / output terminal 14.

In addition, the authentication apparatus 1 of this example basically needs only one infrared light source 12 as a light source, and it is not necessary to use a plurality of infrared light sources as in the prior art, and the power consumption can be reduced.

With reference to FIG. 3, the 1st example of the authentication apparatus 1 by this invention is demonstrated. The authentication device 1 includes an infrared light source 12, a light receiving element string 10, finger detection elements 185 and 186, an interface circuit 16, a microcomputer 15, a power supply circuit 17 and an input / output terminal ( 14), they are mounted to the casing 20.

The infrared light source 12 is mounted to the ceiling 22 in the casing 20, and the light receiving element rows 10 and the finger detection elements 185 and 186 are mounted to the bottom surface 23 in the casing 20. . The infrared light source 12 and the light receiving element array 10 are disposed near the inlet of the hole 21 in the casing 20. One side 185 of the finger detection elements 185 and 186 is disposed near the inlet of the hole, and the other side 186 is disposed in the hole. The light receiving element array 10 and the finger detection elements 185 and 186 are arranged to be perpendicular to the insertion direction of the finger 200 as shown.

In the illustrated example, the finger detecting element 185 and the light receiving element array 10 on the inlet side are provided as separate ones, but both may be used by one element.

The infrared light source 12 may be, for example, a mold type LED (light emitting diode) using a GaAs-based device. The light receiving element string 10 has a plurality of light receiving elements arranged in a row, and each light receiving element converts the received light into an electrical signal.

Finger detection elements 185 and 186 determine whether finger 200 is present. As the finger detection elements 185 and 186, optical elements such as photodiodes, capacitive elements, electrodes, and the like can be used.

When the finger 200 is inserted into the hole 21, the finger detection element 185 on the entrance side first detects the finger. The microcomputer 15 starts the introduction of the output from the light receiving element string 10. When the finger 200 is inserted into the hole 21 again, the finger detection element 186 in the inside detects the finger. The microcomputer 15 finishes introducing the output from the light receiving element string 10. The average moving speed v of the finger can be obtained by measuring the distance L between the two finger detection elements 185 and 186 and the time t from the start of the output introduction to the end. The introduction pitch of the output from the light receiving element string 10 can be obtained by the speed of movement of the finger.

The microcomputer 15 controls the amount of light of the infrared light source 12, the processing of the finger detection signal from the finger detection elements 185 and 186 and the light intensity signal from the light receiving element string 10, and the processing of matching the blood vessel pattern. Personal recognition processing is performed. The interface circuit 16 connects the infrared light source 12, the light receiving element string 10, and the finger detection elements 185 and 186 with the microcomputer 15. The power supply circuit 17 supplies power required for each element of the authentication device 1.

An example of a driving circuit for driving the infrared light source 121 will be described with reference to FIG. 4. The driving circuit 160 of this example has resistors 161, 162, 163 and an Nch-MOS transistor 164. The microcomputer 15 outputs a duty ratio controllable pulse width modulation (PWM) signal to drive the Nch-MOS transistor 164. Tens to hundreds of kHz is used as this drive frequency. If the integration time of the light receiving elements of the light receiving element columns 10 shown in FIG. 3 is sufficiently larger than the driving period of the Nch-MOS transistor 164, each light receiving element of the light receiving element strings 10 is a low pass type. Becomes In other words, only the DC component is received so that an image without spots is obtained. In addition to the PWM signal, a DC voltage signal, a pulse amplitude modulation (PAM) signal, or the like can be used as the drive signal.

Referring to FIG. 5, the positional relationship between the infrared light source 121, the finger 200, and the light receiving element string 10 will be described. In this example, the light from the infrared light source 121 is irradiated to the back 200a of the finger 200 through the window 25 of the casing ceiling 22. The finger 200 is arranged such that the irradiated infrared light is irradiated within a half value angle θ 1/2 of the directivity characteristic in the surface of the back 200a of the finger. A portion of the infrared light irradiated onto the surface of the back 200a of the finger passes through the finger 200 and exits from the surface of the bottom 200b of the finger and is received by the light receiving element string 10. The remaining portion of the infrared light irradiated on the surface of the back 200a of the finger is reflected at the surface of the back 200a of the finger. Some of the reflected light is reflected at the ceiling 22 of the casing.

According to this example, the surface of the ceiling portion 22 is preferably smooth as shown in Fig. 5A. When the surface of the ceiling portion 22 is smooth, the light reflected from the ceiling portion 22 travels away from the finger and does not go to the light receiving element column 10. Therefore, the reflected light does not become noise.

As shown in FIG. 5B, when the surface of the ceiling 22 is non-smooth, the light reflected from the ceiling 22 is reflected in various directions, and part of the light reaches the light receiving element array 10. This reflected light becomes noise for imaging the blood vessel pattern of the finger.

An example of the configuration of the light receiving element string 10 will be described with reference to FIG. 6. The light receiving element row 10 includes a protective film 103 disposed on the surface, a first filter 102 disposed below the second filter 101, a second filter 101 disposed below the light, and light disposed below the protective film 103. Has a plurality of light receiving elements 10, 10... Arranged in one column for converting the signal into an electrical signal.

The first filter 102 blocks visible light and transmits only infrared light components. On the other hand, the light receiving elements 10a and 10b have a characteristic of not having sensitivity to wavelengths longer than any wavelength. That is, the light receiving elements 10a and 10b have sensitivity only to arbitrary wavelength widths from the transmission characteristics of the filter 102 and the wavelength sensitivity characteristics of the light receiving elements 10a and 10b. Thereby, the blood vessel pattern with a good contrast can be imaged.

The second filter 101 transmits only components that are incident vertically among the incident light. The reason for arranging this filter 101 will be described. Infrared light is absorbed by the blood vessels of the finger 200, but is scattered inside the finger to have components in all directions. Therefore, the light receiving element 10 receives components having various incident angles. If the second filter 101 is not provided, the light receiving elements 10a and 10b detect the sum of the components of light emitted from a wide range of the surface of the bottom of the finger and the contrast of the blood vessel pattern is reduced. In this example, by providing the second filter 101, the light receiving element receives only components that are incident in the vertical direction.

As the light receiving elements 10a and 10b, a photodiode or the like integrated on a silicon substrate may be used. The spacing between adjacent light receiving elements 10a, 10b is determined based on the thickness of the blood vessel of the finger. If the interval is about 0.02 mm to 0.5 mm, a blood vessel pattern image sufficient for authentication can be obtained.

7 shows another example of the light receiving element array 10. In this example, the lens array 104 is used instead of the second filter 101 of FIG. 6. By condensing the light scattered on the surface of the finger by the lens array 104, an image with good contrast can be obtained.

The operation of the authentication process will be described with reference to FIG. The authentication operation is executed by a program stored in the memory of the microcomputer 15. First, in step S1, it is determined whether or not the finger detection element 185 on the entrance side has detected the finger 200. If not detected, the process returns to step S1, and if detected, the process proceeds to step S2.

In step S2, the microcomputer 15 starts the introduction of the image of the blood vessel pattern. In step S3, the microcomputer 15 introduces a signal for one line of the image from the light receiving element string 10. The microcomputer 15 controls the amount of light emitted from the infrared light source 12 based on the light intensity signal from the light receiving element string 10 so that the contrast between the portion of the blood vessel pattern and the portion other than that is appropriate. In step S4, the microcomputer 15 determines whether or not a signal for all lines of the image has been introduced from the light receiving element string 10.

In the example of FIG. 3, whether the introduction of the signals for all the lines has been completed can be known by the finger detection element 186 in the inside detecting the finger. In addition, as shown in the example shown in Fig. 9, the linear encoder 183 may detect the movement amount of the button to detect whether the introduction of the signals for all the lines has been completed.

If the images of all the lines have not been introduced, the process returns to step S3. If the images of all the lines have been introduced, the process proceeds to step S5.

In step S5, the microcomputer 15 generates a blood vessel pattern. First, the moving speed of the finger is calculated based on the time from the start to the end of the introduction of the image and the moving distance of the finger. Next, the introduction pitch of the image is calculated based on the moving speed of the finger. The absolute position of the introduced data along the center axis direction of the finger is obtained from the introduction time and the introduction pitch to obtain a two-dimensional distribution of luminance to be an image.

In step S6, the feature parameter extraction process of the blood vessel pattern of the finger is performed. Next, the feature parameters extracted in step S7 are compared with the singular or plural feature parameters stored in advance. When identifying a specific person, such as when authenticating a user of a vehicle, a single feature parameter may be prepared. When identifying a plurality of qualified persons, such as when authenticating a person entering a building, a plurality of feature parameters are prepared.

In step S8, the collation result is determined. If the matching result is matched, a predetermined output is made as a registrant. If there is no matching feature parameter, it is an unregistered person or an output of matching failure.

A second example of an authentication apparatus according to the present invention will be described with reference to FIG. The authentication device 1 of this example includes an infrared light source 12, a light receiving element string 10, a button 181, a spring 182, a linear encoder 183, an interface circuit 16, a microcomputer 15, It has the power supply circuit 17 and the input / output terminal 14, and they are attached to the casing 20. As shown in FIG. The authentication device of this example is different from the authentication device shown in Fig. 3 in that the button 181, the spring 182, and the linear encoder 183 are provided in place of the finger detection elements 185 and 186. Here, the operation of the button 181, the spring 182 and the linear encoder 183 will be described.

Inserting the finger 200 into the hole 21 abuts on the button 181. If the finger 200 is further inserted, the button 181 moves. The position of the button 181 is detected by the linear encoder 183. When the linear encoder 183 detects the start of movement of the button 181, the microcomputer 15 starts reading the light intensity signal from the light receiving element string 10. The linear encoder 183 detects the position of the button 181 and transmits it to the microcomputer 15. The microcomputer 15 obtains a two-dimensional distribution of luminance to be the image shown in FIG. 2 based on the position of the button 181 from the linear encoder 183 and the light intensity signal from the light receiving element string 10. FIG. When the finger 200 is taken out of the hole, the button 181 is returned to the original position by the spring 182.

A third example of the authentication apparatus according to the present invention will be described with reference to FIG. 10 shows a state in which the authentication device of the present example is installed in the door of the vehicle. The authentication apparatus of this example has an infrared light source 12, a light receiving element string 10, a shutter 187, an interface circuit 16, a microcomputer 15, a power supply circuit 17, and an input / output terminal 14.

The infrared light source 12 is provided in the door 5 of the vehicle, and is covered by the transparent protective film 12A. The light receiving element row 10 is provided inside the door handle 4 so as to face the infrared light source 12. A recess is formed in the door handle 4, and a light receiving element array 10 is disposed in the recess. The light receiving element array 10 is covered with a transparent protective film 10A. The movable shutter 187 is disposed inside the door handle. Movement of the shutter 187 is detected by a linear encoder (not shown). Moving the shutter 187 with a finger 200 causes the linear encoder to generate a trigger. The microcomputer 15 starts the introduction of the image by a trigger from the linear encoder.

11, 12, and 13, the positional relationship between the infrared light source and the light receiving element string 10 will be described. In the example shown in FIG. 11A, the infrared light source 121 is disposed on the back 200a side of the finger, and the light receiving element column 10 is disposed on the bottom 200b side of the finger. This is the same as the example of FIGS. 1 and 3. However, for example, as shown in Fig. 11 (b), two infrared light sources 121a and 121b may be arranged with each other interposed therebetween and radiate light at different angles obliquely from top to bottom. As a result, the maximum amount of light can be increased.

As shown in Fig. 11 (c), two infrared light sources 121a and 121b are disposed on both sides of the finger, and light is provided at different angles from obliquely downward to upward on the bottom 200b side of the finger. You may check. In this case, the light receiving element array 10 receives the reflected or scattered light component. FIG. 12 shows an example of a recognition device configured to irradiate two infrared light sources 121a and 121b from obliquely downward to upward on the bottom 200b side of a finger. The recognition device of this example has a bottom surface portion 31 and a frame member 32 provided at three sides thereof. The infrared light sources 121a and 121b are mounted inside the frame member 32. The light receiving element row 10 is provided on the bottom surface portion 31. In this example, since the casing 20 as shown in FIG. 1 is not used, the back 200a portion of the finger is not hidden by the infrared light source, and when the finger 200 is placed at the time of authentication, a feeling of opening In addition, the authentication apparatus 1 can be miniaturized.

In the example shown in FIG. 11 (d), a chip type infrared light source 122 is used. Thereby, the thickness of an infrared light source part can be made small. In the example shown in FIG. 13, the chip type infrared light source 122 is attached to the cantilever beam 191 which can be bent. As shown in Fig. 13A, the cantilever beam 191 is erected when used, and when not used as shown in Fig. 13B, the cantilever beam 191 is bent. The recognition device of this example is compact and convenient to carry.

The shape of the light receiving element array 10 will be described with reference to FIG. 14. In the example shown in Fig. 14A, the light receiving element rows 10 are linear. This is the same as the example of FIGS. 1 and 3. However, as shown in Fig. 14B, a plurality of light receiving element rows 11a, 11b, 11c, ... may be provided and arranged so as to surround the fingers. As shown in the example shown in Fig. 14C, a light receiving element string 11d formed in a curved shape may be used. Further, as shown in the example shown in Fig. 14 (d), the concave lens 111 may be disposed on the light receiving element array 10.

14 (b), 14 (c) and 14 (d), since the light receiving element rows are arranged along the circumferential direction, even if there is rotation around the central axis of the finger when the finger 200 is inserted, Position correction is required, but there is little distortion of the image due to rotation about the central axis of the finger. The error of a blood vessel pattern can be made small. In other words, even if there is rotation around the central axis of the finger, the obtained data can be collated with the registered data.

15 and 16 show a modification of the second example of the authentication apparatus according to the present invention shown in FIG. In the example of FIG. 15, the sole 81 is provided in the end surface of the button 181. As shown in FIG. When the button 181 moves, the surface of the light receiving element row 10 is cleaned by the brush 81. As a result, dust, dust, and dirt adhering to the surface of the light receiving element array 10 are removed. Therefore, it is possible to reduce the scattering of the image due to contamination of the surface of the light receiving element array 10. Moreover, in the example of FIG. 16, the sole 82 is provided in the inlet of a hole. When the finger 200 is inserted into the hole, the surface of the finger is cleaned by the brush 82, and dust, dirt, and dirt attached to the finger are removed. Therefore, the scattering of the image due to the contamination of the surface of the finger 200 can be reduced. In addition, dust and dirt are prevented from entering the inside of the hole to prevent contamination of the surface of the light receiving element row 10.

17 shows another example of the personal authentication device according to the present invention. The personal authentication device of this example has a substantially C-shaped support member 40, and the support member 40 has a roof portion 41, a bottom surface portion 42 and a support portion 43. Three surfaces between the roof portion 41 and the bottom surface portion 42 are open. The infrared light source 12 is attached to the roof part 41, and the light receiving element row 10 is attached in the vicinity of the edge on the bottom surface part 42. As shown in FIG. At the time of authentication, the finger 200 is scanned on the light receiving element string 10 in a direction orthogonal to the arrangement direction of the light receiving element string 10. That is, the finger is horizontally scanned in the direction perpendicular to the direction of the center axis of the finger. In this example, a trigger for starting and terminating the introduction of the light intensity signal may be applied by changing the luminance of light received by the light receiving element string 10. 17, the side part may be provided between the roof part 41 and the bottom face part 42, and may be comprised so that the two surfaces between the roof part 41 and the bottom face part 42 may be opened.

In the example shown in FIG. 18, the light receiving element string 10 is movable. The movement and the position of the light receiving element string 10 are detected by the linear encoder 183. In the example shown in FIG. 18A, a plurality of infrared light sources 12 are used. When the finger 200 is disposed between the infrared light source 12 and the light receiving element string 10, the light receiving element string 10 scans along the central axis direction of the finger. In this case, the control of the lighting of the infrared light source 12 may be controlled one by one depending on the position of the light receiving element column 10, all at the same time, or may be either method. In the example shown in FIG. 18B, the infrared light source 12 moves with the light receiving element string 10. In either case, a two-dimensional image is obtained by the position of the light receiving element string 10 obtained by the linear encoder 183 and the light intensity signal. The initiation of the introduction of the light intensity signal is started by judging that the finger is placed from the change in the brightness incident on the light receiving element array 10.

The example shown in FIG. 18C is a modification of the example shown in FIG. 18B. In the example shown in FIG. 18C, a pushbutton switch 181 is provided. The finger 20 is inserted between the infrared light source 12 and the light receiving element string 10 to push the pushbutton switch 181. The pushbutton switch 181 generates a trigger, and both the infrared light source 12 and the light receiving element string 10 start moving to initiate the introduction of the light intensity signal.

In the personal authentication apparatus of the present invention described above, the blood vessel pattern of the finger was used as the control data. However, instead of the blood vessel pattern of the finger, the blood vessel pattern of the back of the hand or the palm may be used as the control data. When contrasting the blood vessel pattern of the hand, the device becomes larger, but the structure is basically the same.

As mentioned above, although the example of this invention was described, this invention is not limited to the above-mentioned example, It will be easily understood by those skilled in the art that various changes are possible for the scope of the invention as described in a claim.

All publications, patents, and patent applications cited in this specification are incorporated herein by reference in their entirety.

Claims (20)

Infrared light source, A light receiving element array provided to face the infrared light source and comprising a plurality of light receiving elements; A blood vessel pattern of the subject is generated from the output of the light receiving element string and the relative displacement information of the subject when the object passes through the infrared light source and the light receiving element string, and is stored in advance. Personal identification device comprising a matching means for matching with the specified feature parameter. delete delete The method of claim 1, The personal authentication device, characterized in that the person's hand or finger. The method of claim 4, wherein The light-receiving device string includes a light-receiving device arranged in one row. The method according to claim 4 or 5, And a position detecting element for detecting a position of the subject, and generating a two-dimensional image of the subject under the output of the light receiving element string and the position information from the position detecting element. . The method according to claim 4 or 5, And a subject detecting element for detecting the presence or absence of the subject under a position away from the light receiving element string. The method of claim 7, wherein The subject to be detected is plural, and the speed of the subject is calculated from the difference in time passing through the end of the subject to be detected by the plurality of subjects to detect the subject. A personal authentication device characterized by performing distance correction in the scanning direction of the image from the speed. The method of claim 7, wherein The speed of the subject is calculated from the difference between the time of passing the light receiving element string and the end of the subject under the detection by the one or more of the subject detecting elements, and the image from the speed of the subject. Personal authentication device characterized in that the distance correction in the scanning direction of the. The method according to claim 4 or 5, The light receiving element string comprises a plurality of light receiving elements arranged along a straight line personal authentication device. The method according to claim 4 or 5, The light-receiving device string includes a plurality of light-receiving devices arranged along a curve. The method according to claim 4 or 5, The light receiving element string comprises a plurality of light receiving element strings, wherein the plurality of light receiving element strings are arranged along a curve. The method according to claim 4 or 5, Personal authentication device, characterized in that the spacing between two adjacent light receiving elements of the light receiving element array is 0.02 mm to 0.5 mm. The method according to claim 4 or 5, And the light receiving element string has a filter member that transmits only a component of which light is incident substantially vertically. delete delete delete delete The method according to any one of claims 1, 4 or 5, A personal authentication device characterized by authenticating a person by matching a feature parameter of an image registered in advance with a feature parameter of an image obtained from the output of said light receiving element string. The method of claim 6, And a button capable of pressing with a finger on the position detecting element, and the button is provided with a cleaning means, and the personal authentication device is capable of cleaning the surface of the light receiving element row by scanning of the button.

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