JP3861339B2 - Personal identification device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a personal identification device for identifying an individual by irradiating light on a part of the body, particularly the auricle, and measuring the reflected light.
[0002]
[Prior art]
Personal identification technology has become indispensable in the information and communication fields, security systems field, financial industry, etc. with the progress of the information society. The reliability of identification and the convenience, safety, and operability for identification targets Etc., the demand is becoming increasingly sophisticated.
[0003]
The personal identification device that is currently widely used in daily life is for identifying an individual by some kind of identification tool such as a key or ID card, or identification storage information such as a password or a recitation number. However, such personal identification devices are associated with risks such as loss or forgetting of identification tools or identification storage information, and duplication or theft. Therefore, in order to develop a more advanced personal identification system, it is necessary to use a means that is more specific to an individual and always integrated with the individual, as compared with an identification tool or identification stored information. Yes.
[0004]
From such a viewpoint, a method of using human biological information as an image or a numerical value is attracting attention as a next-generation personal identification system. In particular, the use of a part of the body such as a facial shape, a fundus retinal pattern, a fingerprint or the like as biometric information has been studied from the viewpoint that differences among individuals are remarkable and observation and measurement are easy in engineering. Among these biometric information, a personal identification device using a fingerprint will be described below.
[0005]
FIG. 7 is a schematic diagram of a conventional personal identification device (conventional example 1) for identifying an individual based on the shape of a fingerprint. In FIG. 7, 17 is a light source, 18 is a prism, 18a is an incident surface of the prism 18, 18b is an exit surface of the prism 18, 18c is a contact surface of the prism 18, 19a is a lens, 19b is an imaging surface, and 19 is a lens 19a. An observation device 20 having an imaging surface 19b is a data processing unit.
[0006]
The light emitted from the light source 17 such as an LED enters the prism 18 from the incident surface 18a, and is converted into a specific light / dark pattern corresponding to the shape of the fingerprint on the contact surface 18c in contact with the finger. The light passes through 18b and is imaged on the imaging surface 19b by the lens 19a. According to this method, light is totally reflected at the contact surface 18c at the part where the fingerprint is not in contact and is incident on the observer 19, and light is scattered at the contact surface 18c at the part where the fingerprint is in contact. By reducing the amount of light incident on 19, a high-contrast fingerprint image can be captured in the observer 19.
[0007]
The fingerprint image captured by the observer 19 is compared with fingerprint data registered in advance in the data processing unit 20, and if there is a certain level of correlation, a person having the captured fingerprint image, It is recognized that the person of the registered fingerprint data is the same.
[0008]
On the other hand, a method for identifying an individual using an auricle instead of a fingerprint has been studied. The auricle is medically known to have significant individual differences such as shape and size, a) there are few changes due to aging, makeup, etc. b) the auricle is a part where the individual cannot be estimated intuitively Therefore, there are merits such that it is easy to protect the privacy of individuals, and c) the algorithm for identification can be simplified as compared with a personal identification method using a facial shape whose facial expression changes. A conventional example of a personal identification device using such an auricle will be described below.
[0009]
FIG. 8 is a schematic diagram of a conventional personal identification device (conventional example 2) for identifying an individual based on the shape of the pinna. In FIG. 8, 9 is a registration unit, 10 is a comparison / determination unit, 12 is an auricle, 21 is a light source, 22 is an observation device, 22a is a photographing lens, 22b is a CCD image sensor, and 23 is an image information processing unit.
[0010]
When the person to be identified is positioned so that his / her pinna 12 is within the shooting range of the shooting lens 22a, the light source 21 irradiates the pinna 12 with light. Thereafter, the shape of the auricle 12 is taken into the CCD image pickup device 22b through the photographing lens 22a in a non-contact manner. The captured shape of the auricle 12 is processed into predetermined image information in the image information processing unit 23 and then compared with the auricle data registered in the registration unit 9 in advance in the comparison determination unit 10. In the case of having the above correlation, it is recognized that the identification target person and the individual of the registered pinna data are the same.
[0011]
Next, with reference to FIG. 9, a personal identification device with a pinna shape having a configuration different from that of the second conventional example will be described.
[0012]
FIG. 9 is a schematic diagram of a personal identification device (conventional example 3) for identifying an individual based on the shape of the pinna. In FIG. 9, 24 is a light source, 25 is a linear image detector such as a CCD, 26 is a contact pressure plate, and 27 is a linear encoder device for detecting the scanning amount of the linear image detector 25. Moreover, the registration part 9, the comparison determination part 10, and the pinna 12 are the same as that of the 2nd prior art example. The pressure contact plate 26 shown in FIG. 9 has a structure in which a plurality of optical fibers are bundled in a direction perpendicular to a contact surface that contacts the auricle.
[0013]
Detection of a line-shaped image close to the surface opposite to the contact surface of the contact pressure plate 26 with the auricle being in contact with the contact surface of the contact pressure plate 26 and the light source 24 illuminating the auricle 12 By scanning the instrument 25, the shape of the pinna 12 is measured as a two-dimensional light intensity distribution on the contact surface of the contact pressure plate 26. Thereafter, similarly to the second conventional example, the comparison and determination unit 10 compares the pinna data registered in the registration unit 9 in advance with the measured pinna shape, and the both have a certain correlation or more. The person to be identified and the individual of the registered pinna data are recognized as the same.
[0014]
[Problems to be solved by the invention]
However, the conventional personal identification device has the following problems.
[0015]
1) Although the personal identification device using the fingerprint of the first conventional example can be easily performed by a person to be identified in a relatively short time, a fingerprint imprint is necessary for registering fingerprint data. It often gives psychological resistance, discomfort, and pain.
[0016]
2) Since the personal identification device using the pinna of the second conventional example is non-contact, the position of the pinna taken into the CCD image sensor is unstable, and the time required for the person to be identified to position the pinna And the captured pinna shape is not stable and lacks in reliability and reproducibility in collation with registered pinna data.
[0017]
3) Since the personal identification device using the auricle of the third conventional example and the personal identification device of the first conventional example are contact types, the shape of the auricle obtained is different depending on how the load is applied when contacting the auricle or the fingerprint. The pattern of the fingerprint shape fluctuates and lacks reproducibility when reading the shape. In addition, since dirt on the contact surface with which the auricle or the fingerprint comes into contact generates a shape reading error, it is necessary to clean the contact surface in a complicated manner, which requires cost and time in terms of maintenance.
[0018]
4) The personal identification devices of the first conventional example to the third conventional example all process the fingerprint or pinna shape into image information and compare it with the registered data. The algorithm is complicated, the processing time becomes long, and the accuracy of detection of fingerprints and auricles decreases due to the occurrence of errors due to image segmentation during the processing.
[0019]
The present invention solves the above-described conventional problems, can detect the shape of the auricle in a non-contact and reproducible manner, is excellent in identification accuracy and reliability of the identification result, and has less psychological burden on the identification target person. An object of the present invention is to provide a personal identification device that can be miniaturized.
[0020]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a plurality of light-emitting elements arranged substantially linearly at a substantially bowl-shaped head part, an auricle attachment part inside the head part, and a substantially central part in the auricle attachment part. And a plurality of light receiving parts arranged at substantially symmetrical positions with the arrangement direction of the light emitting part as an axis in the auricle wearing part, and the light emitting part sequentially emits light at a predetermined interval.
[0021]
With this configuration, the light emitting unit sequentially emits light at regular intervals, and the reflected light reflected by the pinna close to the head unit is taken into the light receiving unit, so that the shape of the pinna is captured as a point, and a plurality It is possible to recognize the light incident on the light receiving unit as a time-series signal pattern for each light receiving unit, and to process the entire shape of the pinna as a two-dimensional or three-dimensional image Compared to the above, the characteristics of the auricle can be captured more directly and with higher detection accuracy based on the shape of the details.
[0022]
In addition, since the time-series signal patterns measured at each light receiving unit and the registered signal patterns can be directly compared, comparison and discrimination can be performed easily and with high accuracy. The reliability of the result can be improved, and the processing speed is increased, so that identification can be performed in a short time.
[0023]
In addition, since the LED can be used as the light emitting unit and the phototransistor can be used as the light receiving unit, the head unit can be downsized compared to a conventional personal identification device using a lens and a CCD image sensor. In addition, operability can be improved.
[0024]
In addition, it is not necessary to bring the entire auricle into strong contact with the head part, and it does not involve an act of giving unpleasant feeling to the identification target person such as fingerprint printing. Can do.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes a plurality of heads that are substantially bowl-shaped, an auricle mounting part inside the head part, and a plurality of linearly arranged substantially central parts in the auricle mounting part. A light emitting unit and a plurality of light receiving units disposed in a substantially symmetrical position with the arrangement direction of the light emitting unit as an axis in the auricle wearing unit, the light emitting unit sequentially emits light at a predetermined interval, and the auricle wearing a first fixing portion projecting from the center of the portion, and a second fixing portion projecting from the edge of the auricle mounting portion of the head portion, which has a Rukoto provided with ear with the shape of the through detectable and reproducible good in a short time without contact, enhancing the reliability of the identification accuracy and the identification result, reduce psychological burden for the identified subjects and possible reduction in size of the head portion, and the Further, the positional relationship between the auricle and the light emitting part and the light receiving part in the auricle wearing part is fixed by the first fixing part and the second fixing part. Rukoto has the effect that it becomes possible.
[0026]
According to a second aspect of the present invention, there is provided a hair removal means for removing the hair that is interposed between the head portion and the pinna adjacent to the head portion in the first aspect of the invention. By removing the hair that blocks light between the light emitting part and the light receiving part and the pinna, the reproducibility in pinna shape recognition is improved and the convenience of the identification target person is improved. be able to.
[0027]
The invention according to claim 3 of the present invention is the invention according to any one of claims 1 to 2, wherein the shortest distance from the opening surface of the auricle wearing portion of each of the light emitting portions is different. Since the signal pattern in which the shape of the pinna is emphasized can be obtained, the signal pattern according to the pinna shape of the identification target person can be differentiated with higher accuracy. .
[0028]
The invention according to claim 4 of the present invention is the invention according to any one of claims 1 to 3, wherein the shortest distance from the opening surface of the auricle mounting portion of each light emitting portion is different. Thus, since the signal pattern in which the shape of the pinna is emphasized can be obtained, the signal pattern according to the pinna shape of the person to be identified can be differentiated with higher accuracy.
[0029]
Specific examples of embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
FIG. 1 shows a personal identification device according to the first embodiment of the present invention. FIG. 1 (a) is a sectional view of a head portion of the personal identification device according to the first embodiment of the present invention, and FIG. ) Is a plan view of the personal identification device according to the first embodiment of the present invention.
[0030]
1A and 1B, 1 is a head portion, 2 is an edge portion of the head portion 1, 3 is an auricle attachment portion, 4 is a light emitting portion, 5 is a light receiving portion, 6 is a first fixing portion, 7 Is a second fixing unit, 8 is a signal processing unit, 13 is an external ear canal, and the registration unit 9, the comparison determination unit 10, and the auricle 12 are the same as those in the conventional example, and therefore are described with the same reference numerals. Is omitted.
[0031]
As shown in FIGS. 1A and 1B, the personal identification device according to the present embodiment includes a substantially bowl-shaped head portion 1, an auricle attachment portion 3 inside the head portion 1, and an auricle attachment. A plurality of light emitting portions 4 arranged substantially linearly in a substantially central portion in the portion 3 and a plurality of light emitting portions 4 arranged in a substantially symmetrical position in the auricle mounting portion 3 with the arrangement direction of the light emitting portions 4 as axes. A light receiving portion 5; a first fixing portion 6 formed at the center of the auricle mounting portion 3; a second fixing portion 7 formed at the edge portion 2 of the head portion 1 on the auricle mounting portion 3 side; It has.
[0032]
Further, as will be described later, the signal processing unit 8 determines the intensity of the light reflected by the auricle 12 and incident on the light receiving unit 5 when each light emitting unit 4 emits light sequentially at a predetermined interval. The signal is converted into a series signal pattern. In addition, L1-L4 shown in FIG.1 (b) has shown the position of each light emission part 4, and S1-S10 has shown the position of each light-receiving part 5, respectively.
[0033]
Below, the usage method of the personal identification device in this Embodiment is demonstrated using Fig.1 (a), (b).
[0034]
The person to be identified is brought close to the entire auricle 12 so that the auricle mounting portion 3 of the head portion 1 is slightly covered. At this time, the first fixing portion 6 formed in the auricle mounting portion 3 is inserted into the outer ear hole 13 of the auricle 12, so that the center of the auricle mounting portion 3 and the outer ear hole 13 of the auricle are aligned. Positioned. Furthermore, when the second fixing portion 7 formed on the edge portion 2 of the head portion 1 is lightly pressed against the auricle of the auricle 12, the head portion 1 can no longer rotate around the first fixing portion 6. The position of the auricle 12 with respect to the light emitting unit 4 and the light receiving unit 5 in the auricle wearing unit 3 is fixed.
[0035]
In this state, the light emitting unit driving means (not shown) sequentially emits the light emitting units 4 disposed at the respective positions L1 to L4 in the auricle wearing unit 3 at regular intervals and at regular light emitting times. Let The light emitted from the light emitting unit 4 is irregularly reflected on the surface of the auricle 12 according to the shape thereof, and a part of the reflected light is incident on the light receiving unit 5 disposed in the auricle wearing unit 3.
[0036]
The light incident on the light receiving unit 5 is photoelectrically converted and then processed as a time-series signal pattern for each light receiving unit 5 in the signal processing unit 8. Thereafter, the signal pattern output from the signal processing unit 8 is compared with a pinna signal pattern registered in the registration unit 9 in advance in the comparison / determination unit 10, and there is a certain level of correlation between the two signal patterns. If it is recognized, it is recognized that the person to be identified is the same as the registered person.
[0037]
Next, a signal pattern corresponding to the shape of the pinna obtained in the signal processing unit 8 will be described in more detail with reference to FIG.
[0038]
FIG. 2A is a timing chart showing the light emission order of the light emitting sections, and FIG. 2B is a timing chart showing changes in received light intensity in each light receiving section. 2A, L1, L2, L3, and L4 correspond to the respective positions of the light emitting unit 4 shown in FIG. 1B, and in FIG. 2B, S1, S2, S3, and S4. , S5, S6, S7, S8, S9, and S10 correspond to the respective positions of the light receiving unit 5 shown in FIG.
[0039]
As shown in FIG. 2A, when the light emitting units 4 located at L1 to L4 are sequentially emitted at a constant interval and a constant light emission time, the received light intensity of the reflected light in the light receiving unit 5 is Depending on whether the light emitting section 4 emits light or depending on the position where the light receiving section 5 is disposed, the change with time varies as shown in FIG. The time-series signal pattern of the received light intensity in each light receiving unit 5 located in S1 to S10 reflects the shape of the pinna of the person to be identified in a point manner. It can be used as identification information.
[0040]
As described above, in the personal identification device according to the present embodiment, the characteristics of the pinna are based on the shape of the details as compared with the conventional personal identification device that processes the entire shape of the pinna as a two-dimensional or three-dimensional image. More directly and with higher detection accuracy.
[0041]
In addition, when image processing is performed on the entire pinna shape as in the past, it is necessary to subdivide the image step by step when comparing it with the registered pinna data. However, according to the present embodiment, the time-series signal pattern in each light-receiving unit and registration are registered. Can be compared directly, making comparison discrimination simple and highly accurate, improving identification accuracy and reliability of identification results, and increasing processing speed. Can do.
[0042]
Further, the head portion shown in this embodiment can be reduced in size as compared with a conventional personal identification device using a lens and a CCD image pickup device.
[0043]
Furthermore, since it is not necessary to make the entire auricle have a strong contact pressure, and it does not involve an act of giving unpleasant feeling to the identification target person such as fingerprint printing, the psychological burden on the identification target person can be reduced.
[0044]
As described above, according to the present embodiment, the shape of the auricle can be detected in a non-contact and reproducible manner in a short time, and the discrimination accuracy and the reliability of the discrimination result are excellent. It is possible to provide a personal identification device that can be reduced in size and size.
[0045]
In the present embodiment, a plurality of light emitting units are arranged in the auricle wearing unit, but for example, one light emitting unit can be moved in the arrangement direction of the light emitting unit shown in the present embodiment, It is considered that the same operation as this embodiment can be obtained by repeating the operation of emitting light by moving the light emitting unit at predetermined intervals.
[0046]
(Embodiment 2)
FIG. 3 is a perspective view of the head portion of the personal identification device according to the second embodiment of the present invention, and FIGS. 4A and 4B are views of the head portion of the personal identification device according to the second embodiment of the present invention. It is a top view.
[0047]
3 and 4 (a) and 4 (b), 14a is a rotating shaft, 14b is a hair removal arm, 15 is a hair removal spatula, head portion 1, edge portion 2, auricle attachment portion 3, Since the light emitting unit 4, the light receiving unit 5, the first fixing unit 6, and the second fixing unit 7 are the same as those in the first embodiment, the same reference numerals are given and the description thereof is omitted.
[0048]
The personal identification device in the present embodiment is different from that in the first embodiment in that two rotary shafts 14a rotatably disposed in the auricle mounting portion 3 of the head portion 1 are used as hair removal means. The substantially hair-like hair-removing arm 14b projecting from the rotary shaft 14a and the substantially plate-like hair-removing spatula portion 15 formed on the top of the head portion 1 are provided. .
[0049]
Below, the usage method of the personal identification apparatus in this Embodiment is demonstrated using Fig.4 (a), (b).
[0050]
First, when almost the entire pinna of the identification target person is hidden by the hair, the identification target person brings the head unit 1 close to the pinna until the edge 2 of the head unit 1 touches the hair. When the identification operation is started from this state, the two rotating shafts 14a disposed in the auricle wearing portion 3 rotate, and a plurality of protruding hairs are provided on the rotating shaft 14a in a generally U-shape with the rotation. The arm 14b operates in the form of a double door, and removes the hair covering the pinna on both sides of the edge portion 2. As a result, it is possible to remove the hair that blocks light between the light emitting unit 4 and the light receiving unit 5 in the pinna attachment unit 3 and the pinna. The subsequent pinna identification operation is the same as in the first embodiment. When the identification operation is completed, the rotating shaft 14a rotates in the opposite direction to that described above, and the hair removal arm 14b is again pinched. It will be in the state accommodated in the mounting part 3. FIG.
[0051]
In addition, when the entire pinna of the identification target person is not hidden by the hair, but a part (particularly the upper part) is hidden by the hair, the identification target person brings the head unit 1 close to the lower part of the pinna. As a result, the substantially plate-like hair removal spatula 15 formed on the upper part of the head unit 1 scoops up the hair, and in the same manner as described above, the hair that blocks the light between the light emitting unit 4 and the light receiving unit 5 and the auricles. Can be removed.
[0052]
As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained, and the hair that is blocked by light between the light emitting unit and the light receiving unit and the pinna can be removed, so that the shape of the pinna The reproducibility in recognition can be improved and the convenience of the identification target person can be improved.
[0053]
The shape and number of the hair removal arms of the hair removal means shown in the present embodiment are not particularly limited to those shown in FIGS. 3 and 4A and 4B.
[0054]
(Embodiment 3)
FIG. 5 is a cross-sectional view of the head unit of the personal identification device according to the third embodiment of the present invention, FIG. 6A is a timing diagram showing the light emission order of the light emitting units, and FIG. It is a timing diagram which shows the change of.
[0055]
In FIG. 5, reference numeral 16 denotes an opening surface, and the head portion 1, the edge portion 2, the auricle mounting portion 3, the light emitting portion 4, the light receiving portion 5, the first fixing portion 6, and the second fixing portion 7 are the first embodiment. Therefore, the same reference numerals are used and description thereof is omitted.
[0056]
The personal identification device in the present embodiment is different from that in the first embodiment in that the shortest distance from the opening surface 16 of the auricle wearing portion 3 of each light emitting unit 4 (the opening surface in the normal direction of the opening surface 16). 16 and the light emitting section 4) k1, k2, k3, k4 are different.
[0057]
By disposing each light emitting unit 4 in this way, each light emitting unit 4 emits light compared to the case where the shortest distance from the opening surface 16 of the auricle wearing unit 3 of each light emitting unit 4 is the same. In addition, it is possible to weight the intensity of the reflected light incident on the light receiving unit 5 and to obtain a signal pattern that emphasizes the shape of the pinna characteristic of the person to be identified. In particular, by arranging the light emitting unit 4 located in S2 that mainly irradiates the upper half of the pinna having a more complicated pinna shape closer to the opening surface 16 as shown in FIG. As shown in (a) and FIG. 6 (b), it is possible to differentiate signal patterns obtained with higher accuracy.
[0058]
As described above, according to the present embodiment, the same effect as that of the first embodiment can be obtained, and a signal pattern in which the shape of the pinna is emphasized can be obtained. The signal pattern can be differentiated with higher accuracy.
[0059]
In the present embodiment, the head portion may be provided with hair removal means as shown in the second embodiment.
[0060]
【The invention's effect】
As described above, according to the present invention, the characteristics of the auricle are more directly based on the shape of the details than the conventional personal identification device that processes the entire shape of the auricle as a two-dimensional or three-dimensional image. Therefore, it is possible to capture with higher detection accuracy, and it is possible to obtain an excellent effect that the reproducibility when recognizing the shape of the pinna can be improved.
[0061]
In addition, since the time-series signal pattern in each light receiving unit measured can be directly compared with the registered signal pattern, the configuration of the comparison determination unit can be simplified and the time required for identification In addition, it is possible to obtain an excellent effect that the identification accuracy and the reliability of the identification result can be improved.
[0062]
In addition, since the LED can be used as the light emitting unit and the phototransistor can be used as the light receiving unit, the head unit can be downsized compared to a conventional personal identification device using a lens and a CCD image sensor. In addition, it is possible to obtain an excellent effect that the convenience of the identification target person who scans the head portion can be improved.
[0063]
In addition, it is not necessary to bring the entire auricle into strong contact with the head part, and it does not involve an act of giving unpleasant feeling to the identification target person such as fingerprint printing. An excellent effect is obtained.
[0064]
In addition, the positional relationship between the auricle and the light emitting unit and the light receiving unit in the auricle wearing unit can be fixed by the first fixing unit and the second fixing unit, thereby reproducing the shape when recognizing the shape of the auricle. The excellent effect that the property can be improved is obtained.
[0065]
In addition, it is possible to remove the hair that is blocked by light between the light emitting unit and the light receiving unit and the pinna, thereby improving the reproducibility in the pinna shape recognition and improving the convenience of the identification target person. Is obtained.
[0066]
Further, by obtaining a signal pattern in which the shape of the pinna is emphasized, it is possible to obtain an excellent effect that the signal pattern can be differentiated with higher accuracy according to the pinna shape of the person to be identified.
[Brief description of the drawings]
1A is a cross-sectional view of a head portion of a personal identification device according to a first embodiment of the present invention. FIG. 1B is a plan view of a personal identification device according to a first embodiment of the present invention. FIG. 3 is a timing diagram showing a light emission order of the light emitting units. FIG. 3 is a perspective view of a head unit of the personal identification device according to the second embodiment of the present invention. (A) Plan view of the head part of the personal identification device according to the second embodiment of the present invention (b) Plan view of the head part of the personal identification device according to the second embodiment of the present invention FIG. FIG. 6 is a cross-sectional view of a head portion of a personal identification device according to a third embodiment. FIG. 6A is a timing diagram illustrating a light emission order of light emitting portions. FIG. 7B is a timing diagram illustrating a change in received light intensity at each light receiving portion. Conventional personal identification device for identifying an individual by the shape of the FIG. 8 is a schematic diagram of a conventional personal identification device (conventional example 2) that identifies an individual by the shape of the pinna. FIG. 9 is a personal identification device that identifies an individual by the shape of the pinna. Schematic diagram of conventional example 3) [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head part 2 Edge part 3 Auricle mounting part 4 Light emission part 5 Light receiving part 6 1st fixing part 7 2nd fixing part 8 Signal processing part 9 Registration part 10 Comparison determination part 12 Auricle 13 Outer ear hole 14a Rotating shaft 14b Hair removal Arm 15 Hair removal spatula 16 Opening surface 17, 21, 24 Light source 18 Prism 18a Incident surface 18b Outgoing surface 18c Contact surface 19a Lens 19b Imaging surface 19, 22 Observer 20 Data processing unit 22a Imaging lens 22b CCD imaging device 23 Image information processing unit 25 Line-shaped image detector 26 Contact pressure plate 27 Linear encoder device

Claims (3)

A substantially hook-shaped head portion, an auricle mounting portion inside the head portion, a plurality of light emitting portions arranged substantially linearly at a substantially central portion in the auricle mounting portion, and the auricle mounting portion A plurality of light receiving portions arranged at substantially symmetrical positions with the light emitting portion arrangement direction as an axis, and sequentially emits the light emitting portions at a predetermined interval and protrudes from a central portion in the auricle wearing portion A personal identification device, comprising: a first fixing portion that is formed; and a second fixing portion that protrudes from an edge of the head portion on the auricle attachment portion side. The personal identification device according to claim 1, further comprising hair removal means for removing the hair interposed between the head portion and the pinna adjacent to the head portion. The personal identification device according to claim 1, wherein a shortest distance from the opening surface of the auricle wearing portion of each light emitting portion is different.

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