JP2003308521A - Iris authenticator and portable information device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an iris authenticator and a portable information device that can guide the position of a pupil naturally even if a user wears spectacles and can execute iris authentication even when the user wears spectacles. <P>SOLUTION: The iris authenticator comprises a mirror part 13 for reflecting a pupil 60, an imaging part 20 for imaging the pupil 60 as the mirror part 13 reflects the pupil 60, an authentication processing part 70 for executing personal authentication from the image picked up, a plurality of light source parts 11 and 12 spaced over a given distance from an optical axis of the imaging part 20 to irradiate the pupil 60, and a control part 42 for controlling blinking of the plurality of light source parts 11 and 12. The control part 42 blinks each of the plurality of light source parts 11 and 12 selectively, and the authentication processing part 70 executes personal authentication from the image picked up when either of the plurality of light source parts 11 and 12 is lit. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to C through an optical system.
An iris authentication device for authenticating a user is acquired by using iris pattern information of a human body imaged by a CD, a CMOS, or the like, and in particular, iris information of a pupil arranged relatively close to an optical system is acquired and acquired. The present invention relates to an iris authentication device that authenticates a user using the generated iris information and a portable information device such as a mobile phone device that uses the iris authentication device.

[0002]

2. Description of the Related Art In recent years, mobile phone devices, PDAs (Pers)
Mobile information devices such as personal digital assistants (PCs) and personal computers (personal computers) are rapidly spreading. Especially, in mobile phone devices, with the background of miniaturization, weight reduction, and multi-functionalization of devices,
I-mode provided by a mobile phone carrier,
A network-compatible mobile phone device equipped with a Web browser, an Internet-compatible mailer, etc., which supports J-sky, EZ-Web services (both are registered trademarks), etc., is rapidly becoming popular. Using such a network-compatible mobile phone device, browsing information on a network such as the Internet and exchanging electronic information such as electronic mail have been actively performed.

In addition, recent mobile phone devices are provided with a history of outgoing and incoming calls such as telephone calls and electronic mails, their contents, a destination address management function, and a personal schedule management function. Extremely personal,
A lot of information that is not desired to be known to others has been stored.

Further, in recent years, e-commerce such as buying and selling of goods and stocks, and deposit and withdrawal such as transfer to a financial institution such as a bank are also performed on such a network-compatible mobile phone device. Has become.

As described above, the portable telephone device of recent years has stored therein information that is extremely personal and is not desired to be known to other important persons. On the other hand, in general, mobile phone devices are characterized by their small size and light weight.
There was a problem that it was easy to get lost and stolen. Therefore, in the unlikely event that the user is lost or stolen, a third party who is not the original user can easily operate on behalf of the person himself / herself by performing the same key operation as the user in inputting the password, etc. There was a big security problem that it was relatively easy.

Various techniques have been disclosed in order to prevent such impersonation by a third party.

For example, Japanese Unexamined Patent Application Publication No. 2001-333171 proposes a structure in which an iris authentication device, which is one of biometrics authentication methods, is mounted on a mobile phone device.

[0008]

[Patent Document 1] Japanese Unexamined Patent Application Publication No.
The technique proposed in Japanese Patent Laid-Open No. 001-333171 does not disclose any technique related to a light source necessary for performing iris authentication. Furthermore, in the general iris authentication method, no consideration has been given to the removal of the reflected light reflected by the spectacle lens when the user wears glasses, which is a big problem.

That is, in the iris authentication method, light is applied to the iris of the pupil to be authenticated by the light source, and the reflected light is imaged and analyzed. However, for example, when the user wears spectacles, the brightness of the reflected light reflected by the lens of the spectacles is extremely large compared to the brightness of the reflected light from the iris that should be originally captured, and In order to remove this reflection, which is an obstacle, it is necessary to ask the user to remove the eyeglasses or change the position of the light source and take another image. How to solve such a problem with a portable information device has never been proposed.

In view of the above-mentioned problems, the present invention naturally guides the position of the pupil even when the user wears glasses, without the need to urge the user to remove the glasses. Another object of the present invention is to provide an iris authentication device that allows a user to perform iris authentication even while wearing glasses, and a portable information device equipped with this iris authentication device.

[0011]

An iris authentication device according to the present invention is a person who uses a mirror unit that reflects the pupil, an image capturing unit that captures the image of the pupil with the pupil reflected in the mirror unit, and an image captured by the image capturing unit. An authentication processing unit that performs authentication, a plurality of light source units that are arranged at a predetermined distance from the optical axis of the imaging unit and illuminate the pupil, and a control unit that controls blinking of the plurality of light source units, The control unit selectively flashes each of the plurality of light source units, and the authentication processing unit is characterized by performing personal authentication with an image captured when any one of the plurality of light source units is turned on.

With such a configuration, even when the user who performs personal authentication wears a light-reflecting object such as eyeglasses, it is possible to obtain an image that does not include a reflected light component from the light-reflecting object. Therefore, it is not necessary for the user to wear and remove the glasses, and an iris authentication device with a small burden on the user can be obtained. Further, since the user is guided by using the mirror unit, the position of the pupil can be naturally determined, and accurate authentication can be performed, and an iris authentication device with a small user burden can be provided.

Further, the image processing unit is provided with an image determination unit which determines that the image is a defective image when the image contains information exceeding a predetermined brightness, and the authentication processing unit is more effective by not performing personal authentication on the defective image. The image that does not include the reflected light component from the light reflector can be determined, and the defective image including the reflected light component from the light reflector is not personally authenticated, so no useless calculation is performed. Mu.

Further, since the size of the mirror portion is configured so that the area from the inner corner of the pupil to the outer corner of the eye is reflected, the user naturally arranges the pupil within the angle of view of the optical system without a feeling of resistance. Can be guided to.

Further, the mirror portion is arranged on the optical axis of the image pickup portion, and the peripheral portion of the optical axis of the mirror portion allows the light of the wavelength generated by the light source portion to pass therethrough. It is possible to arrange an optical system in.

Further, even if the mirror portion is arranged on the optical axis of the image pickup portion and the hole portion is provided in the peripheral portion of the optical axis,
It is possible to place the optical system behind the mirror section.

Further, the shape of the hole provided in the mirror is
If it is configured to have a circular shape with a diameter of 5 mm or more and 7 mm or less in the direction perpendicular to the optical axis, the user aligns the black eye of the pupil with the hole portion, so that the position of the user's pupil is at a predetermined position Can be guided to.

Further, since the mirror section is composed of a plane mirror, the user can guide the position of the user's pupil to a predetermined position by displaying the image of his / her own pupil on the mirror section. The configuration can be easily provided.

Further, the mirror portion is formed of a concave mirror, and more preferably, the radius of curvature thereof is formed to be 100 mm or more and 400 mm or more so that the distance between the user's pupil and the mirror portion is set to a predetermined position. , It is possible to guide the user naturally without a feeling of resistance.

Further, the light source section is at least 3.87 cm in the direction perpendicular to the optical axis with respect to the optical axis center of the image pickup section.
With the above-described configuration in which they are separated from each other, it is possible to prevent glare due to reflected light from a light reflector having a smaller radius of curvature.

Furthermore, the irradiation light of the light source unit is near infrared light, and more preferably, the near infrared light whose wavelength is distributed in the range of 750 nanometers to 850 nanometers allows the cornea of the pupil to be detected. It becomes possible to remove the influence of the reflected light and to more efficiently capture and capture the reflected light from the iris.

Further, according to the structure provided with the focus degree determining section for determining the focus degree of the image captured by the image capturing section, it is possible to more accurately guide the distance of the pupil from the optical system. Therefore, more accurate iris recognition is possible.

Further, if the portable information device having the iris authentication device as described above is configured, the iris authentication with high accuracy can be performed even for a user wearing glasses, and higher security protection is possible. Portable information device can be obtained.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) As a first embodiment of the present invention, a portable telephone device will be described as an example.

FIG. 1 is a front view showing the external appearance of a portable telephone device according to the first embodiment of the present invention.

The mobile phone device 1 of the present embodiment has a structure in which the upper housing 7 and the lower housing 9 are connected via a joint 8 having a hinge 10. The upper housing 7 has an antenna section 5, a speaker section 4, and an LCD (Liquid Crys).
tal Display) and EL (Electro-L)
The configuration is provided with an iris authentication device 50 having a display section 6 using an illuminant) and the like, a first light source section 11 and a second light source section 12, and a mirror section 13 formed therebetween.

At the center of the mirror section 13, a hole section 14 is formed by making a hole in a part of the mirror section 13. An optical system 15 of the image pickup section is formed at the center section of the mirror section 13. It is located so that it can be seen from the outside.

On the lower housing 9 of the portable telephone device 1, a direct key portion 2 such as a numeric keypad and a microphone portion 3 are formed.

The iris authentication device of the present invention will be described in more detail.

FIG. 2 is a block diagram showing the configuration of the iris authentication device 50 mounted on the mobile phone device 1 according to the first embodiment of the present invention.

In FIG. 2, the image pickup section 20 includes a mirror section 13 having a hole section 14, an optical system 15, and a visible light cut filter 2.
2, and an image pickup device 23 including a device such as a CCD or a CMOS.

As the optical system 15, a fixed focus optical system may be used, or an optical system equipped with a zoom lens or an autofocus mechanism may be used. Since the iris recognition device of the present invention is configured to perform iris recognition from a relatively short distance (about 100 mm), in the case of a fixed focus, an optical system 15 designed so that the focus is about 100 mm is used. To use.

Further, so as to sandwich the image pickup unit 20 from both sides,
The first light source unit 11 and the second light source unit 12 are formed,
Near-infrared light is emitted to the user's pupil 60.

According to experiments, it is desirable that the near-infrared light irradiated here is near-infrared light distributed in the range of 750 nm to 850 nm. When the near-infrared light is distributed in this range, the effect of the reflected light from the cornea can be most effectively removed, the reflected light from the iris can be more efficiently captured, and the image of the iris can be obtained. It is possible to obtain.

In addition to this, the iris authentication apparatus 50 of the present embodiment performs signal processing on the image acquired by the image pickup device 23 to perform preprocessing so as to obtain information that enables iris authentication, Based on the information output from the signal processing unit 24, the image selection unit 4 that determines whether the information is a good image or not.
3 is provided.

Further, the iris information extracting section 51 for inputting the information selected as the good image from the image selecting section 43 and extracting the iris information, and the iris information accumulating section 52 in which the information including the iris information registered in advance is accumulated. , And the iris information accumulated in the iris information accumulating unit 52 and the image selecting unit 43 are compared and collated to perform personal authentication, and the iris collation processing unit 53.
The authentication processing unit 70 is provided.

Further, the iris authentication device 50 of the present embodiment.
Is a display signal switch for switching and outputting an error message and an output from the character generator 33 that generates a character character for performing operation guidance to the user, the character generator 33, and an output from the mobile terminal unit 45 described later. The display unit 30 includes the unit 32 and the display unit 6 that displays the output from the display signal switching unit 32 to the user.

Furthermore, the first light source unit 11, the second light source unit 12, the image pickup device 23, the signal processing unit 24, and the image selection unit 4
3, the iris information extraction unit 51, and the iris collation processing unit 53, and has a control unit 42 that controls each.

The mobile phone unit 1 of the present embodiment has a structure in which a mobile terminal unit 45 that realizes a function installed in a known mobile phone unit is mounted.

Next, the operation of such an iris authentication device will be described in detail.

First, the user disposes the pupil 60 at a predetermined position with respect to the image pickup section 20.

Regarding the arrangement of the pupil 60 by this user, guidance is performed using the mirror section 13 which is a plane mirror. This method will be described with reference to FIG.

FIG. 3 is a diagram for explaining a pupil position guiding method of the iris authentication device 50 according to the first embodiment of the present invention. FIG. 3A shows an iris authentication device 5 according to this embodiment.
FIG. 6 is a diagram showing the state of the mirror portion 13 viewed from the user at 0. As mentioned above, formed by a plane mirror,
A circular hole portion 14 is formed in a part of the mirror portion, and an optical system 15 (specifically, a lens surface) of the image pickup portion can be seen in the back.

When the horizontal length of the mirror portion 13 is L, the vertical length thereof is H, and the diameter of the hole portion 14 is D, as shown in FIG. 3 (a). , 10 mm <L <20 mm 5 mm <H <20 mm 5 mm <D <7 mm.

The values of L and H are obtained by halving the vertical and horizontal size ranges of the entire general human pupil 60.

The value of D is obtained by halving the range of the size of the black eye of the general human pupil 60.

By forming in this way, it is possible to accurately guide the user's pupil 60 to a predetermined position.

The first inducing action in such a structure will be described. First, as shown in FIG. 3B, the user reflects his / her own 60-eye image while looking at the mirror section 13. At this time, since the hole 14 is formed in the size of the above-described range, the user moves himself or herself so that the hole 14 is in the same position as the black eye portion of the pupil 60, or the mobile phone device. By moving 1 itself, on the optical axis of the optical system 15 of the imaging unit 20 or within the angle of view of the optical system 15,
The pupil 60 can be easily guided.

Similarly, as a second guiding action, the user looks at the mirror portion 13 and projects his / her pupil 60 image, and at this time, the mirror portion 13 is formed to have the above-described predetermined size. Thus, the user moves by himself or moves the mobile phone device 1 itself so that the entire image of the pupil 60 of the pupil 60 from the inner corner to the outer corner of the eye can be reflected on the optical system of the imaging section 20. It is also possible to easily guide the pupil 60 on the optical axis of 15 or within the angle of view.

With the combination of these two guiding actions, the user naturally finds his / her pupil 60 in the optical system 15 of the image pickup section 20.
It can be placed at the center of the optical axis of, and accurate iris authentication can be performed.

The size from the outer corner of the eye to the inner corner of the eye varies relatively depending on the person, age, etc.
It is generally accepted that the size of the black eye of 0 does not depend on a person's difference, age, etc., so that the first inducing action is very effective.

Further, the iris authentication device 50 of the present embodiment.
According to the above, by using the mirror unit 13 to guide the position of the user's pupil 60, the distance A between the mirror unit 13 and the pupil 60 shown in FIG. 3C is also guided to a predetermined distance. Is possible.

This utilizes the fact that the clear vision distance of a person having a general visual acuity is about 20 to 30 cm. In general, it is widely known that an image of oneself reflected in a mirror appears at a position twice as far as an actual mirror.

That is, the iris authentication device 5 according to the present embodiment.
When 0 is used, when the user projects his / her own pupil 60 on the mirror section 13, the distance A shown in FIG. 3C is naturally guided to half the clear vision distance, that is, about 10 to 15 cm. .

As described above, in the iris authentication device 50 of the present embodiment, the guiding action using the mirror portion 13 and the hole portion 14 as described above does not impose a burden on the user and causes the user to do so. The position of the pupil 60 can be arranged on the optical axis of the optical system 15 of the imaging unit 20 or within the angle of view of the optical system 15.

Returning to FIG. 2 again, after the user has placed the pupil 60 at a predetermined position, the user inputs a key (not shown) or the like, and the fact that the iris authentication is started is transmitted to the control unit 42.

The control section 42 carries out the flow processing as shown in FIG. That is, first, the first light source unit 11 is turned on to illuminate the pupil 60 (step S1). Next, by controlling the image sensor 23, the image information of the first iris of the pupil 60 obtained through the optical system 15 and the visible light cut filter 22, that is, the first iris information (in the present specification, the image of the iris). The information is referred to as iris information) and is sent to the signal processing unit 24 (step S2).

The signal processing section 24 performs electronic shutter control, performs pre-processing such as contrast adjustment on the acquired first iris information, and sends it to the image selecting section 43.

Next, the control section 42 turns off the first light source section 11 (step S3), turns on the second light source 12 and illuminates the pupil 60 (step S4).

Next, the control unit 42 controls the image pickup device 23 to acquire the second iris information and sends it to the signal processing unit 24 (step S5).

The signal processing section 24 performs pre-processing such as contrast adjustment on the acquired second iris information and sends it to the image selecting section 43.

The image selecting section 43 selects, from the first iris information and the second iris information sent, the image information which is not influenced by the reflected light from the eyeglasses, that is, has no reflection, and is good. Only the image information is sent to the iris information extraction unit 51 of the authentication processing unit 70 (step S6).

Specifically, when the image information has a glare, the image information contains very high luminance information.
The determination is made based on whether or not the brightness information equal to or higher than a preset threshold value is included. At this time, the luminance information in the image information may be differentiated, and the rate of change may be used for the determination. In this case, if the image information has a sharp change in luminance, it is determined that the image is a defective image.

If both the first iris information and the second iris information are defective images, the process returns to step 1 and is processed again (step S7).

Next, in the iris information extraction unit 51, the iris image information in the image sent from the image selection unit 43 is coded by a known method, and the coded information is stored in the iris information storage unit 52. To the iris matching processing section 53 (for example, the method described in US Pat. No. 5,291,560 can be used).

The iris collation processing unit 53 collates whether the transmitted coded information matches the pre-registered information stored in the iris information storage unit 52,
If they match, the mobile terminal unit 45 is instructed to authenticate itself and the mobile terminal unit 45 is to be processed. On the other hand, if they do not match, the character generator 33 indicates "I could not authenticate. An error message such as "Cannot be used" is created, or an error message created separately in advance is displayed on the display unit 6 via the display signal switching unit 32.

Further, instead of the above-mentioned processing flow, processing may be performed by the processing flow shown in FIG.

In the process flow shown in FIG. 5, the first light source unit illuminates the pupil (step S8), and the first iris information is acquired (step S9). Although the same, next, in step S10, it is first determined whether or not the first iris information acquired in step S9 is a good image. If it is judged as a good image,
It is sent to the iris information extraction unit 51 of the authentication processing unit 70.

When the first iris information is not judged to be a good image, the first light source unit is turned off (step S11), the second light source unit illuminates the pupil (step S12), and the second Obtain iris information (step S13).

Here, it is judged whether or not the second iris information is a good image, and if it is judged as a good image, it is sent to the iris information extraction unit 51 of the authentication processing unit 70, and if it is not judged, Returns to step S8 and performs iris authentication again, or creates an error message such as "Could not be authenticated. The desired function cannot be used" with the character generator 33, or an error message created separately in advance. You may display on the display part 6 via the display signal switching part 32 (step S14). The other processing is the same as the processing float shown in FIG. 4, and thus the description thereof is omitted.

If the processing is performed according to the processing flow shown in FIG.
If one of the iris information is judged to be a good image, it is transmitted to the authentication processing unit 70 compared to the processing flow shown in FIG. 4, so that the authentication work can be performed earlier.

In the iris authentication device 50 of the present embodiment, the above description has been made on the assumption that either the first iris information or the second iris information does not include reflection due to reflected light from glasses or the like. .

In the present invention, the first light source unit 11 and the second light source unit 12 are arranged in the following relationships, respectively, so that the first iris information and the second iris as described above are arranged. It is possible to realize a configuration in which one of the pieces of information does not include reflection due to the reflected light from the eyeglasses or the like.

FIG. 6 is a diagram for explaining the correlation required for the light source section, the spectacles, and the optical system of the image pickup section in the first embodiment of the present invention. Here, the requirements necessary for H2 when the user wears glasses assuming that the first light source unit 11 is separated from the optical system 15 by a predetermined distance H2 will be described.

The user's pupil 60 is arranged on the optical axis of the optical system 15, and the distance between the iris and the optical system 15 is L.
And the radius of the iris is I. The user wears glasses 71 (only the surface is shown), and the distance between the surface of the glasses 71 and the optical system 15 is D1.

Next, the light incident from the first light source unit 11 is reflected by the eyeglasses 71 and reaches the image pickup device 23 through the optical system 15. This becomes a glare and hinders the analysis of iris image information.

Here, when the light incident from the first light source unit 11 when the reflection occurs, the vertical height from the optical axis of the position O where the light is reflected on the spectacles 71 is set to H1, and the position O at that position O is set. The radius of curvature of the eyeglasses 71 is R1. At this time, a straight line connecting the center of curvature P of the eyeglasses 71 and the position O,
The angle formed by the optical axis is B1. Further, the angle formed by the straight line connecting the entrance pupil center Q of the optical system 15 and the position O with the optical axis is A1.

Under these conditions, A1 = tan ⁻¹ (I / L) (1) H1 = D1 tan (A1) (2) B1 = sin ⁻¹ (H1 / R1) (3)

Therefore, the image of the first light source unit 11 is the optical system 1
The angle A2 to be formed with the optical axis in the case of being reflected on 5 is represented by A2 = A1 + B1 + B1 = A1 + 2B1 (4), and the first light source unit 11 and the optical axis of the optical system 15 are The distance H2 to be made is represented by H2 = H1 + D1tanA2 (5) as shown.

Using such a relationship, 90% or more of the commercially available myopia spectacles are generally widely used at present in view of the fact that the diopter value +7.75 or less, which shows the refractive power, is generally used. Assuming the eyeglasses 71 having the smallest radius of curvature among the eyeglasses 71, for example, in myopia eyeglasses having a diopter value of +7.75, the radius of curvature R1 of the largest one having the smallest radius of curvature is R1. = 4
It was 1.02 mm. For example, assuming that the distance between the iris of the pupil 60 for authentication and the optical system 15 is 100 mm, the glasses 71
When the distance D1 between the optical system 15 and the optical system 15 is set to 90 mm, the first light source unit 11 and the optical system 1 in which glare occurs in view of the average human iris radius I = 6.5 mm.
The distance H2 from the optical axis of 5 can be calculated as H2 = 38.71 mm.

According to the experiment, if the first light source unit 11 is separated from the optical axis of the optical system 15 by 38.71 mm or more in the vertical direction, the image of the first light source unit 11 is reflected on the optical system 15. I was able to confirm that there was nothing.

Similarly, with respect to the second light source section 12 as well, the image of the second light source section 12 is not reflected on the optical system 15 if it is separated from the optical axis of the optical system 15 by 38.71 mm or more in the vertical direction. Needless to say.

That is, in the mobile phone device 1 including the iris authentication device 50 of the present embodiment shown in FIG. 1, the first light source unit 11 and the second light source unit 12 are 38.71 mm.
It is most desirable that they are separated by a distance of at least 77.42 mm.

However, the above-mentioned spectacles having a diopter value of +7.75 are spectacles having a very high degree of correction and are not very common.

In order to prevent the reflection of the light source by the spectacles having a correction power of about +5 of the diopter value which is generally used, the first light source section 11 and the second light source section 12
It can be confirmed that there is no practical problem if the two are separated by about 50 mm.

Further, if the distance is within this range, the housing can be easily held by one hand even when it is mounted on the portable telephone device 1, which is preferable.

By configuring the portable telephone device 1 equipped with such an iris authentication device 50, when handling highly confidential information such as e-commerce, sending and receiving mail, etc. In case of removing the key lock of, the iris authentication enables higher security protection.

Further, if the portable telephone device 1 equipped with such an iris authentication device 50 is constructed, the user can
For example, even when wearing glasses, it is possible to obtain iris information that is not reflected by the reflected light, so the user can take off the troubles such as removing the glasses and urging authentication again. It is possible to provide a mobile phone device having excellent usability.

Although the portable telephone device 1 is shown as an example of the portable information device in the present embodiment, the portable information device of the present invention is not limited to this, and includes devices such as a PDA and a personal computer. Needless to say.

(Second Embodiment) In the first embodiment, a preferred example of the iris authentication device and the portable telephone device of the present invention has been shown, but in the second embodiment, another BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of will be described with reference to the drawings.

FIG. 7 is a block diagram showing the structure of the iris authentication device according to the second embodiment of the present invention.

The iris authentication device 90 of the present embodiment in FIG. 7 is different from the iris authentication device 50 as shown in FIG. 2 of the first embodiment in that the signal processing unit 24 and the image in FIG. Between the selection unit 43 and the focus degree determination unit 81
Is different.

The iris authentication device of the present invention is characterized in that the user can naturally arrange the position of the pupil 60 at a predetermined position necessary for authentication, but in the unlikely event that the user places the pupil 60 at the predetermined position. When the authentication is started in a state where the image sensor 23 is not arranged, a so-called out-of-focus image with a defocused image is acquired by the image sensor 23.

In order to prevent this, the iris authentication device 90 of the present embodiment is provided with a focus degree determination unit 81, determines whether the acquired image is in focus, and is in focus. In this case, send it to the image selection section 43, and if it is out of focus, the character generator 33 creates a message "The subject is out of focus. Please take your eyes closer (or move away) again." Or an error message prepared in advance is displayed on the display unit 6 through the display signal switching unit 32.

With such a configuration, it is possible to provide an iris authentication device and a mobile phone device that have higher usability, that is, a small burden on the user and that can perform highly accurate authentication.

(Third Embodiment) Next, the third embodiment of the present invention will be described.
In this embodiment, still another embodiment of the iris authentication device 50 will be described.

FIG. 8A is a front view showing the outer appearance of the iris authentication device 50 according to the first embodiment of the present invention. The mirror portion 13 having the hole portion 14 is arranged between the first light source portion 11 and the second light source portion 12. The optical system 15 is configured to be viewed by the user through the hole 14.

FIG. 8B is a front view showing the external appearance of the iris authentication device 94 viewed from the user according to the third embodiment of the present invention.

In the iris authentication device 94, the mirror portion 93 does not have a hole portion, and the whole is configured by a so-called hot mirror that reflects visible light and transmits near infrared light. In the peripheral area of the optical system 15, the guide portion 9 is formed by a method widely used for marking such as cutting with a printing blade, engraving, etc. for guiding the black eye to a predetermined position by the user.
Two are provided. The size of the guide portion 92 is determined by the same method as that of the hole portion 14 described in the first embodiment. With such a structure, the user can naturally guide the position of the iris and the optical system 15 and the hole are not directly exposed on the surface, so that the lens forming the optical system 15 is protected from the outside. It is possible to do so, and there is no feeling of pressure or discomfort to the user.

Further, in the iris authentication device 94, in the mirror portion 93, only the portion including the peripheral portion of the optical system 15 (the portion included in the angle of view to be the optical path) is constituted by a hot mirror, or only this portion is formed. A configuration may be adopted in which near infrared light is transmitted by selectively vapor-depositing a reflection film that does not reflect visible light, for example, a vapor deposition film that forms a mirror.

Next, FIG. 8C is a front view showing the external appearance of another iris authentication device 96 of the present embodiment seen from the user.

In this structure, the mirror section 95 covers both the first light source section 11 and the second light source section 12. The mirror unit 95 is composed of a hot mirror or the optical system 1
5, the first light source unit 11 and the second light source unit 12 should be configured with hot mirrors in the peripheral portions (portions that should be optical paths), or do not vapor-deposit a reflective film forming mirrors in the peripheral regions. A configuration in which near-infrared light is transmitted by selective vapor deposition may be used.

With such a configuration, the user does not see the first light source unit 11, the second light source unit 12 and the optical system 15, so that the user may feel unnecessary oppressing feeling or strange feeling. Absent. Further, with such a configuration, the first
The light source unit 11, the second light source unit 12, and the optical system 15 can be protected from the outside.

Although the hole and the guide in the iris authentication device of the present invention have a circular shape in this embodiment, the user is naturally guided to the position of the pupil. It goes without saying that the shape may be rectangular or any other shape as long as it has a shape.

Although the mirror portion in the iris authentication device of the present invention has a rectangular shape in the present embodiment, it may have a shape such that the user can naturally guide the pupil position. Needless to say, the shape may be elliptical or another shape.

(Fourth Embodiment) In the above-described embodiments of the present invention, an embodiment in which the mirror portion of the iris authentication device is formed of a plane mirror has been shown. However, the iris authentication of the present invention is described. In the device, the mirror part is a convex mirror, a concave mirror,
Alternatively, it goes without saying that it may have an aspherical shape. When a curved surface is used for the mirror portion, the position of the pupil can be guided more effectively.

FIG. 9 shows the distance between the user's pupil and the mirror when the radius of curvature is 100 mm and the convex mirror and the concave mirror are used and the user projects his or her own pupil in the mirror. And the size of the reflected image of the pupil.

As shown in FIG. 9, when the convex mirror is used and when the concave mirror is used, the size of the reflected image of the eye changes when the distance between the user's pupil and the mirror is changed. .

By utilizing this, the size of the mirror portion is set to a predetermined size in advance, or the size of the hole portion or the guide portion is set to a predetermined size. Make sure that the size of the black eye matches, or that the area from the corners of the eyes to the inside of the eyes is exactly reflected in the mirror.
By changing the position of the iris authentication device or moving the device itself, the position of the pupil can be naturally guided and moved to a predetermined distance and a predetermined position.

As shown in FIG. 9, in order to form an iris authentication device using such a phenomenon, it is better to use a concave mirror than the size of the reflection image of the pupil with respect to the change in the distance between the pupil and the mirror portion. Since the rate of change in the height is high, guiding with a concave mirror produces a higher guiding effect.

For example, when a concave mirror having a radius of curvature of 100 mm as shown in FIG. 9 is used as the mirror portion and the optimum pupil-mirror distance for iris authentication is 100 mm, the distance between the pupil and the mirror portion is set. However, in the case of a predetermined 100 mm, a black eye image appears in 10 mm, but in the case of 80 mm, 18 mm, 1
When the length is 20 mm, the size of the black eye greatly changes to 8 mm. Therefore, in order to guide the user to a predetermined distance, the guide part or the hole for guiding the black eye of the mirror part has a size of 10 mm. It is possible to use a configuration in which the size of the black eye of the user is adjusted to the hole.

According to experiments, assuming that the optimum pupil-to-mirror distance for iris authentication is 100 mm, and the radius of curvature of the concave mirror is set to 100 mm or more and 400 mm or less, the user can be effectively guided. Do you get it. That is,
When the distance between the pupil and the mirror is W, the radius of curvature R of the concave mirror is
When the relationship of W ≦ R ≦ 4W is satisfied, the user can be guided most effectively.

Further, as shown in FIG. 9, when the concave mirror is used as the mirror portion, the image is rapidly inverted at a distance of about half the radius of curvature from the mirror portion. This inversion may be used to guide the pupil position of the user.

In this case, assuming that the optimum pupil-to-mirror distance for iris authentication is 100 mm and the radius of curvature of the concave mirror is set to 180 mm or more and 220 mm or less, the user can be effectively guided. Do you get it. That is,
When the distance between the pupil and the mirror is W, the radius of curvature R of the concave mirror is
Can most effectively guide the user using inversion when the relationship of 1.8 W ≦ R ≦ 2.2 W is satisfied.

In this embodiment, a concave mirror is used for the mirror portion,
The configuration in which the size of the guide part or the hole part is guided in accordance with the size of one's own iris or the size of the guide part is guided based on the position where the image is inverted has been described, but the iris authentication device of the present invention is not limited to this. For example, the size of the entire mirror part using a concave mirror should be set to a size that will fit all the images when the image from the inside of the pupil to the outside of the eyes is projected from a predetermined distance, It is only necessary to form the guide part.

It goes without saying that a convex mirror may be used for the mirror portion.

Further, in all the embodiments of the present invention, two light source portions are provided on both sides of the optical system at equal intervals in the horizontal direction, but the iris authentication device of the present invention is shown. Is not limited to this.

For example, if two light source units are arranged obliquely with respect to the optical system, or two light source units are arranged above and below the optical system, a predetermined distance from the optical axis of the optical system to the direction perpendicular to the optical axis. If they are separated by a distance, the direction in which they are arranged is not limited.

Further, it is needless to say that the iris authentication device of the present invention is not limited to the number of light source units being two and may have a configuration having two or more light source units.

In all the embodiments of the present invention, the portable telephone device is shown as an example of the portable information device.
The portable information device of the present invention is not limited to this, and for example, a PD
It goes without saying that it also includes information devices such as A and personal computers.

[0122]

As described above, by using the iris authentication device of the present invention and the portable information device using the same, the mirror portion and the hole or guide portion formed in the mirror portion are effectively used. , The user's eyes can be naturally guided to a predetermined position.

Even if the user wears spectacles or the like by arranging the two light sources at a predetermined distance, the iris information obtained by irradiation of one of the light sources is It is possible to obtain information without reflection of reflected light reflected by a surface such as.

By using the iris authentication device of the present invention, it is possible to perform iris authentication of a pupil located at a relatively short distance, and since the device configuration can be downsized, a portable information device such as a mobile phone. Can be used for.

[Brief description of drawings]

FIG. 1 is a front view showing the external appearance of a portable information device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an iris authentication device mounted on the portable information device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an iris authentication device according to the first embodiment of the present invention,
Diagram for explaining the method of guiding the pupil position

FIG. 4 is a flowchart showing a processing flow of a control unit according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a processing flow of a control unit according to the first embodiment of the present invention.

FIG. 6 is a diagram illustrating a correlation necessary for a light source unit, glasses, and an optical system of an imaging unit according to the first embodiment of the present invention.

FIG. 7 is a diagram showing a second embodiment of the present invention,
Block diagram showing the configuration of the iris authentication device

FIG. 8 is a front view showing the outer appearance of the iris authentication device according to the third embodiment of the present invention.

FIG. 9 shows a distance between the user's pupil and the mirror unit when the user projects his / her own pupil on the mirror unit by using a convex mirror and a concave mirror for the mirror unit in the fourth embodiment of the present invention. , A diagram showing the correlation with the size of the reflected image of the pupil

[Explanation of symbols]

1 Mobile phone device 2 Direct key part 3 Microphone section 4 speaker 5 Antenna section 6 Display 7 Upper case 8 joints 9 Lower case 10 Hinge part 11 First light source unit 12 Second light source unit 13, 93, 95 Mirror 14 holes 15 Optical system 20 Imaging unit 22 Visible light cut filter 23 Image sensor 24 Signal processor 30 display means 32 Display signal switching section 33 Character Generator 42 Control unit 43 Image Selector 45 Mobile terminal 50, 90, 94, 96 Iris recognition device 51 Iris information extraction unit 52 Iris information storage unit 53 Iris matching processing unit 60 eyes 70 Authentication processing unit 71 glasses 81 Focus Determining Section 92 Guide

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04M 1/67 A61B 3/14 Z // A61B 3/14 5/10 320Z F term (reference) 4C038 VA07 VB04 VC01 VC05 5B047 AA23 BC11 5K027 AA11 BB09 HH23 HH26 5L096 BA18 CA02 FA00 JA11

Claims (14)

[Claims] 1. A mirror unit that reflects a pupil, an image capturing unit that captures the pupil in a state where the pupil is reflected on the mirror unit, and an authentication processing unit that performs personal authentication based on an image captured by the image capturing unit. Arranged at a predetermined distance from the optical axis of the imaging unit, a plurality of light source units that illuminate the pupil, and a control unit that controls blinking of the plurality of light source units, the control unit, The iris authentication device, wherein each of the plurality of light source units is selectively blinked, and the authentication processing unit performs personal authentication with an image captured when any one of the plurality of light source units is turned on. 2. An image determination unit that determines that the image is a defective image when the image contains information that exceeds a predetermined brightness, and the authentication processing unit does not perform personal authentication on the defective image. The iris authentication device according to claim 1. 3. The iris authentication device according to claim 1, wherein the size of the mirror portion is configured so that an area from the inner corner of the pupil to the outer corner of the eye is reflected. 4. The mirror section is arranged on the optical axis of the image pickup section, and the peripheral section of the optical axis of the mirror section transmits light of a wavelength generated by the light source section. The iris authentication device according to any one of claims 1 to 3, which is characterized. 5. The mirror unit is arranged on an optical axis of the image pickup unit, and a hole is provided in a peripheral portion of the optical axis, according to any one of claims 1 to 4. The iris authentication device according to item 1. 6. The shape of the hole provided in the mirror portion is a circular shape having a diameter of 5 mm or more and 7 mm or less in a direction perpendicular to the optical axis. Iris recognition device. 7. The iris authentication device according to claim 1, wherein the mirror portion is formed of a plane mirror. 8. The iris authentication device according to claim 1, wherein the mirror portion is a concave mirror. 9. The iris authentication device according to claim 8, wherein a radius of curvature of the concave mirror is 100 mm or more and 400 mm or less. 10. The light source section is at least 3.87 in a direction perpendicular to the optical axis with respect to the optical axis center of the imaging section.
The iris authentication device according to any one of claims 1 to 9, wherein the iris authentication devices are separated by at least cm. 11. The iris authentication device according to claim 1, wherein the irradiation light of the light source unit is near-infrared light. 12. The iris authentication device according to claim 11, wherein the near-infrared light is light distributed in a wavelength range of 750 nanometers to 850 nanometers. 13. The method according to claim 1, further comprising a focus degree determination unit which determines a focus degree of an image captured by the image capturing unit. The iris authentication device described. 14. A portable information device comprising the iris authentication device according to any one of claims 1 to 13.