JP2007301058A

JP2007301058A - Individual authentication device

Info

Publication number: JP2007301058A
Application number: JP2006130963A
Authority: JP
Inventors: Hiroshi Sakai; 博詞酒井
Original assignee: Hitachi Omron Terminal Solutions Corp
Current assignee: Hitachi Omron Terminal Solutions Corp
Priority date: 2006-05-10
Filing date: 2006-05-10
Publication date: 2007-11-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a configuration of an individual authentication device which shows user-friendliness and has high authentication precision in individual authentication using images of digital veins. <P>SOLUTION: The individual authentication device prevents rotations and shift of the finger to be authenticated in the lateral or longitudinal direction by providing a guide which uses a position of a bifurcated portion at the base between fingers as a reference for positioning the finger. The authentication precision is improved by acquiring images of digital veins with high reproducibility to individual physical variations. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は生体認証する装置に係り、特に指静脈画像データを利用して個人認証又は特定する装置に関する。 The present invention relates to an apparatus for biometric authentication, and more particularly to an apparatus for personal authentication or identification using finger vein image data.

人間の生体情報を利用して個人認証するものとして、指紋や虹彩等の情報（データ）を使うものが挙げられるが、中でも人間の指内部にある静脈の画像を利用する指静脈認証技術が注目されている。この指静脈画像データを用いて個人認証を行う方法として特許文献１があり、１本の指の指紋を下面に向けて挿入できる挿入部を設けたケースと、前記指に対してその上面から透過光を発生する光源部と、任意波長に対して光透過性を有する干渉フィルタ部と、該干渉フィルタ部を透過した透過光を撮像する撮像部と、該撮像部から出力される前記指の静脈画像データを予め記憶された画像データと照合できる照合用データを作成する画像処理部とからなる個人認証装置を開示する。 Personal authentication using human biometric information includes information that uses information (data) such as fingerprints and irises, but finger vein authentication technology that uses images of veins inside human fingers is the focus of attention. Has been. Patent Document 1 discloses a method for performing personal authentication using finger vein image data, and a case provided with an insertion portion that allows a fingerprint of one finger to be inserted toward the lower surface and the finger transmitted through the upper surface. A light source unit that generates light, an interference filter unit that transmits light with respect to an arbitrary wavelength, an imaging unit that captures transmitted light that has passed through the interference filter unit, and the finger vein output from the imaging unit Disclosed is a personal authentication device that includes an image processing unit that creates collation data capable of collating image data with prestored image data.

そして認証対象である指の位置決めは、認証対象指を挿入部に挿入し、奥行きは指の先端を指突き当て部に突き当て、左右方向は上部指付け根押し当て部でガイドして、指の左右回転は目視出来る位置に設けられた三角マークに指の甲の中心が合うように目視で合わせるものである。 The finger to be authenticated is positioned by inserting the finger to be authenticated into the insertion portion, the depth is abutting the tip of the finger against the finger abutting portion, and the left and right direction is guided by the upper finger base abutting portion. The left / right rotation is to make visual adjustment so that the center of the back of the finger is aligned with a triangular mark provided at a visible position.

特開２００４−０４９７０５号公報JP 2004-049705 A

上述した特許文献１では、認識対象の指の上部に光源部が配置され、挿入部を覆うため、外光を遮断できる構造であるが、利用者は内部が見えない挿入部に指を挿入し、手探りで指先端部を突起部に合わせる必要がある。また、内部が見えない開口部に指を挿入することは、利用者に不安感を与える。また指の左右方向の回転防止を三角マークに目視で合わせるためにバラツキが生じ、再現性よく指静脈画像データを取得できないため個人認証精度が低くなるという欠点があった。更には、指の先半分の指静脈画像データを取得するため指先端部にガイドとして壁となる突起部を設けると、爪の長い人にとっては前記突起部が邪魔になってしまう。逆に爪の長い人にとっても前記突起部が邪魔にならないように前記突起部を小さくすると、指先端部の位置合わせガイドとしての効果が無くなってしまうという矛盾があった。また別の問題として、指の短い人にとっては指先端部が突起部まで届かないことも考えられる。 In Patent Document 1 described above, the light source unit is arranged on the upper part of the finger to be recognized and covers the insertion unit, so that the external light can be blocked. However, the user inserts the finger into the insertion unit where the inside cannot be seen. It is necessary to align the tip of the finger with the protrusion by groping. Moreover, inserting a finger into the opening where the inside cannot be seen gives the user anxiety. In addition, there is a drawback in that the finger vein image data cannot be obtained with high reproducibility, and the personal authentication accuracy is lowered because the finger rotation is visually adjusted to prevent the finger from rotating in the left-right direction. Furthermore, if a protrusion serving as a wall is provided as a guide at the tip of the finger in order to acquire finger vein image data of the fingertip half, the protrusion is an obstacle for a person with a long nail. On the other hand, there is a contradiction that even if a person with a long nail is made small so that the protrusion does not get in the way, the effect as an alignment guide for the finger tip is lost. As another problem, it can be considered that the finger tip does not reach the protrusion for a person with short fingers.

本発明の目的は、上述した課題の何れか１つ以上を解決することを目的とする。例えば指の先半分の静脈画像データを取得するのではなく、指の根元半分の静脈画像データを取得することで、個人の身体的バラツキ、すなわち指や爪の長い人、短い人にとっても高い再現性を持って指静脈画像を取得できる指静脈認証装置を提供することにある。 An object of the present invention is to solve any one or more of the above-described problems. For example, by acquiring vein image data of the base half of the finger instead of acquiring vein image data of the half of the fingertip, it is highly reproducible even for individuals with physical variations, that is, those with long fingers and nails It is an object of the present invention to provide a finger vein authentication device that can acquire a finger vein image with certainty.

本発明は、指の腹面を下に向けて載せることができる開放的な指の設置部を設けたケースと、前記指に対して両側面から透過光を発生する光源部と、任意の波長に対してのみ光透過性を有する干渉フィルタ部と、干渉フィルタ部を透過した透過光を撮像する撮像部と、更には撮像部から出力される前記指の静脈画像データを予め記憶された画像データと照合する撮像装置又は個人認証装置にある。 The present invention includes a case provided with an open finger installation portion that can be placed with the belly surface of the finger facing down, a light source portion that generates transmitted light from both sides of the finger, and an arbitrary wavelength. An interference filter unit having a light transmission property only, an imaging unit that images the transmitted light that has passed through the interference filter unit, and image data that stores vein image data of the finger output from the imaging unit in advance. It exists in the imaging device or personal authentication device to be collated.

また指の設置部は、指と指の「また」の位置を決める突起部と、指の先半分を支持する突起部とを有する。指と指の「また」の位置を決める突起部は、前記指の長手方向の元半分である第２関節から指の根元部分が干渉フィルタ部の真上に位置するように配置することが望ましい。 In addition, the finger installation portion includes a protrusion that determines the position of the finger and the “male” of the finger, and a protrusion that supports the tip half of the finger. It is desirable to arrange the protrusions that determine the position of the “to” between the fingers such that the root portion of the finger is located directly above the interference filter portion from the second joint which is the original half of the finger in the longitudinal direction. .

即ち、認証装置の指設置部に指を置く際の指長軸方向のずれ、指短軸方向のずれ（指の左右のずれ）、指の静脈画像撮像部との位置ずれを防止して、毎回の指の撮像面を同一にし指静脈データ読取の再現性を高める必要がある。そこで、指長軸方向のずれを防止する為に指と指の「また」の位置を決める突起を儲け、指短軸方向のずれを防止する為に指の根元と先半分を支持する突起を設け、該突起形状を指形状と類似のラウンド形状としている。更には、指長軸を軸とした回転を防止するために、指の根元部分を支持する突起を複数設ける。 That is, when the finger is placed on the finger installation part of the authentication device, the finger long axis direction deviation, the finger short axis direction deviation (finger left and right deviation), and the finger vein image capturing unit are prevented from being displaced, It is necessary to increase the reproducibility of finger vein data reading by making the imaging surface of each finger the same. Therefore, in order to prevent displacement in the finger long axis direction, a protrusion that determines the position of the “to” between the finger and the finger is provided, and in order to prevent displacement in the finger short axis direction, a protrusion that supports the root and tip half of the finger is provided. The protrusion shape is a round shape similar to the finger shape. Furthermore, in order to prevent rotation about the finger long axis, a plurality of protrusions for supporting the base portion of the finger are provided.

特に指長軸を軸とした回転を防止する方法は、１本の指だけを支えても回転を防止することは困難であり、同時に複数の指の指先半分を支えたとしても、指の根元を指長軸を軸とした回転方向に回すと指先半分も一緒に連れ回りしてしまう。つまり、指の回転は指先半分だけを支えるのではなく、複数の指の根元を回転させないように支えることで解決する。また指の根元はすべての指の根元を支えてもよいが、撮像する指の根元と隣り合う指の根元を複数同時に支えられれば指の回転を規制することができる。 In particular, the method of preventing rotation around the long axis of a finger is difficult to prevent rotation even if only one finger is supported, and even if the fingertip halves of multiple fingers are supported at the same time, Rotate in the direction of rotation about the long axis of the finger, the fingertip half will be rotated together. That is, the rotation of the finger is solved not by supporting only the half of the fingertip but by supporting the roots of a plurality of fingers so as not to rotate. The finger bases may support the bases of all the fingers. However, if a plurality of finger bases adjacent to the finger bases to be imaged can be supported simultaneously, the rotation of the fingers can be restricted.

本発明によれば、指の静脈画像を利用した個人認証において、指と指の付け根の「また」で指を設置する際の位置決めを行い、指の付け根の関節を複数同時に支えることで指の回転を抑制し、指の根元半分の指静脈画像データを取得することで、個人の身体的バラツキ、すなわち指や爪の長い人、短い人にとっても高い再現性を持って指静脈画像を取得することができ高い認証精度の個人認証装置を提供することができる。 According to the present invention, in personal authentication using a finger vein image, positioning is performed when a finger is placed at the “to” of the finger and the base of the finger, and a plurality of joints at the base of the finger are simultaneously supported. By acquiring finger vein image data at the base half of the finger while suppressing rotation, finger vein images can be obtained with high reproducibility even for individuals with long physical and finger nails It is possible to provide a personal authentication device with high authentication accuracy.

以下、本発明の実施形態について添付図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は個人認証装置の外観斜視図で、図２は図１の個人認証装置に指を置いた状態で撮像部を手前側から見た図、図３は図１の個人認証装置に指を置いた状態で撮像部を真上から見た図を図示する。なお、この個人認証装置は例えば自動機の操作面に配置して暗証番号と併用又は代替するのが望ましい。自動機は、例えば、銀行、郵便局、消費者金融会社等の金融機関の支店等に配設されたＡＴＭ（ＡｕｔｏｍａｔｉｃＴｅｌｌｅｒＭａｃｈｉｎｅ：現金自動預払機）、ＣＤ（ＣａｓｈＤｉｓｐｅｎｓｅｒ：現金自動支払機）等の自動取引装置である。更に、鉄道の駅、道の駅、バスの停留所、高速道路のサービスエリアやパーキングエリア、遊技場、劇場、博物館、駐車場、食堂、スポーツ施設等に配設された自動券売機でのクレジット利用の個人認証であってもよい。また自動機以外では金融営業店内の金庫入り口や、住居入り口等の不当な入退室を防止する必要のある場所に設置して、個人を認証する形態で使用するのが望ましい。以下の例では個人認証装置が撮像した指静脈画像データを画像処理する、登録済みの個人データとを照合する制御部を有しているが、この制御部を当該装置外に設けても良く、指の静脈データを撮像できれば十分なことから単に撮像装置とも言う。 1 is an external perspective view of the personal authentication device, FIG. 2 is a view of the image pickup unit viewed from the front side with the finger placed on the personal authentication device of FIG. 1, and FIG. 3 is a view of the personal authentication device of FIG. The figure which looked at the image pick-up part from right above in the state where it put down is illustrated. Note that it is desirable that this personal authentication device is placed on the operation surface of an automatic machine, for example, and used together with or in place of a personal identification number. Automatic machines include, for example, ATMs (Automatic Teller Machines), CDs (Cash Dispensers), etc. installed at branches of financial institutions such as banks, post offices, and consumer finance companies. This is an automatic transaction apparatus. In addition, use of credits at automatic ticket machines installed at railway stations, road stations, bus stops, highway service areas and parking areas, amusement halls, theaters, museums, parking lots, restaurants, sports facilities, etc. It may be personal authentication. In addition to automatic machines, it is desirable to install in locations where it is necessary to prevent unauthorized entry and exit such as safe entrances in financial sales offices and residence entrances, and use them in a form that authenticates individuals. The following example has a control unit that performs image processing on finger vein image data captured by the personal authentication device and collates with registered personal data, but this control unit may be provided outside the device, Since it is sufficient if the finger vein data can be imaged, it is also simply called an imaging device.

図１に示すように、個人認証装置は上ケース１と下ケース２で搭載デバイス類を覆い、上ケース１から光源実装部３が左右２箇所、つまり１対が上ケース１の面より上方へ突出する。そして光源実装部３は左右双方が向かい合うように光源照射窓４が開けられている。図示するように、上ケース１は指の腹面を下に向けて載せることができる開放的なもののため、ある部位の中に指を挿入するような方式に比べてユーザの不安が少ない。しかし上部を開放的な構造とすると、撮像に必要な光源の他に金融営業店内の蛍光灯、また店舗入り口付近に設置される場合は西日等、撮像の外乱となる外光の影響による認識率の低下が懸念される。図示する個人認証装置は、干渉フィルタ５の上面には認証対象指１０が配置されるため、装置上面からの外乱光の影響は受けにくく、認証対象指１０の両サイドは、光源実装部３が外乱光を遮るのに十分な高さを有して配置されている。指の根元側は、前記光源実装部３の形状と一体で指と指の「また」を位置決めする「また」位置ガイド７を設けている。ここで、「また」位置ガイドの設置位置としては、指の根元半分の指静脈撮像が可能となる位置、即ち、指の長手方向の元半分である第２関節から指の根元部分が干渉フィルタ部の真上に位置するように配置することが望ましい。更に、前記「また」位置ガイド７と一体化し、且つ光の差込む隙間を無くした形で、指の根元を支える指根元ガイド６を配置する。また指静脈撮像範囲で指の先端側においては、前記光源実装部３と一体化し、且つ光の差込む隙間を無くした形で、指先端側支えガイド８を配置する。以上の構造的特長を採用することにより、利用者に目視できない部分に指を挿入する不安感を与えることなく、外乱光による認識率の低下を抑止される。 As shown in FIG. 1, the personal authentication apparatus covers the mounted devices with an upper case 1 and a lower case 2, and the light source mounting unit 3 is located at two locations on the left and right from the upper case 1, that is, one pair is above the surface of the upper case 1. Protruding. The light source mounting part 3 has a light source irradiation window 4 so that both the left and right sides face each other. As shown in the figure, the upper case 1 is open so that the abdominal surface of the finger can be placed downward, so that the user is less anxious than a method in which the finger is inserted into a certain part. However, if the upper part is an open structure, in addition to the light source necessary for imaging, it is recognized by the influence of external light that causes disturbances in imaging, such as fluorescent lights in financial stores, and when installed near the entrance of the store, such as West Japan There is concern about a decline in the rate. Since the authentication target finger 10 is arranged on the upper surface of the interference filter 5 in the illustrated personal authentication device, the light source mounting unit 3 is not affected by disturbance light from the upper surface of the device. It is arranged with a height sufficient to block ambient light. On the finger base side, a “middle” position guide 7 is provided which is integrated with the shape of the light source mounting portion 3 to position the “male” between the fingers. Here, as the installation position of the “middle” position guide, a position where the finger vein imaging of the finger half of the finger can be performed, that is, the finger root portion from the second joint which is the original half of the finger in the longitudinal direction is an interference filter. It is desirable to arrange so that it is located directly above the part. Further, the finger base guide 6 that supports the finger base is disposed in a form that is integrated with the “or” position guide 7 and that eliminates a gap into which light is inserted. In addition, on the finger tip side in the finger vein imaging range, the finger tip side support guide 8 is disposed so as to be integrated with the light source mounting portion 3 and without a gap into which light is inserted. By adopting the above structural features, it is possible to suppress a decrease in the recognition rate due to ambient light without giving the user a sense of anxiety of inserting a finger into an invisible part.

次に光源実装部３に挟まれた面には干渉フィルタ５があり、干渉フィルタ５は近赤外線のみを透過させることができるガラス製もしくは樹脂製のシートである。干渉フィルタ５の手前には指の根元を支える指根元支えガイド６を配置し、干渉フィルタの奥側には指の先端側を支える指先端側支えガイド８を配置する。前記指根元支えガイド６と前記指先端側支えガイド８のどちらか一方もしくは両方の短手方向中心部には、指の指短手方向中心位置を示すために、点字１個程度の突起で指短手方向中心位置ガイド９を設ける。 Next, there is an interference filter 5 on the surface sandwiched between the light source mounting portions 3, and the interference filter 5 is a glass or resin sheet that can transmit only near infrared rays. A finger base support guide 6 that supports the finger base is disposed in front of the interference filter 5, and a finger tip side support guide 8 that supports the finger tip side is disposed behind the interference filter. At one or both of the finger base support guide 6 and the finger tip side support guide 8 in the short direction center part, a finger is projected with a braille protrusion to indicate the finger short direction center position. A short direction center position guide 9 is provided.

認証装置への指の置き方は二点鎖線のように人差し指と中指の付け根の間の「また」、中指と薬指の付け根の間の「また」をそれぞれ「また」位置ガイド７に突き当てるように置く。こうすることで指長軸方向の位置が決定される。これがもし指の先端位置合わせで指を置く認証装置の場合は、指が短い人にとっては指の先端位置合わせ部まで指が届かないことが考えられる。この状態では、指の根元部分は根元ガイドに接地していても、指の先端部分は浮いているため撮像部との距離が安定せず、結果として認識率の低下につながることが考えられる。また爪の長い人にとっても、指の先端位置合わせの場合は指先端位置ガイドが爪の邪魔になり、認証装置に安定して指を置くことができないことが考えられる。これに対して本発明の指と指の「また」を基準にした指の接地方法では、指や爪の長い、短いに関係なく、認証装置への指の長軸方向の位置が安定して決まる。更には認証対象指と隣接する指とで「また」位置ガイド７を挟み込むように指を接地するため、指長軸を軸とした回転も抑制することができる。 The finger is placed on the authentication device so that the “again” between the index finger and the base of the middle finger and the “me” between the middle finger and the base of the ring finger are brought into contact with the “position” position guide 7 as indicated by a two-dot chain line. Put on. In this way, the position in the finger long axis direction is determined. In the case of an authentication device in which a finger is placed by finger tip alignment, it is conceivable that the finger cannot reach the finger tip alignment unit for a person with a short finger. In this state, even if the base portion of the finger is in contact with the base guide, the tip portion of the finger is floating, so the distance from the imaging unit is not stable, and as a result, the recognition rate may decrease. Further, even for a person with a long nail, it is conceivable that the finger tip position guide interferes with the nail when the finger tip is aligned, and the finger cannot be stably placed on the authentication device. On the other hand, the finger grounding method based on the finger and the finger "male" of the present invention stabilizes the position of the finger in the long axis direction to the authentication device regardless of whether the finger or nail is long or short. Determined. Furthermore, since the finger is grounded so that the position guide 7 is sandwiched between the finger to be authenticated and the adjacent finger, rotation about the finger long axis can also be suppressed.

更に指の根元部分を指根元支えガイド６に接地し、指の先端側を指先端側支えガイド８に接地する。こうすることで外乱光の侵入を防止し、認識率の低下が抑止される。また、指根元部、指先端側の両方で接地するため、中指を浮かせた状態で撮像部との距離も安定して決まる。更に指を指根元支えガイド６と指先端側支えガイド８に接地する際に、指の短手方向中心位置を指短手方向中心位置ガイド９に合わせることで、指の指短軸方向の位置（指の左右の位置）が決定される。ここで、指根元支えガイド６と指先端側支えガイド８の形状としては、指の置き位置を連想させるようなＲ形状としておくと、利用者にとって指を置く位置が判り易くなる。 Further, the base of the finger is grounded to the finger base support guide 6, and the tip of the finger is grounded to the finger tip side support guide 8. By doing so, disturbance light can be prevented from entering, and a reduction in recognition rate can be suppressed. In addition, since the ground is grounded at both the finger base and the finger tip side, the distance from the imaging unit is also stably determined with the middle finger floating. Further, when the finger is brought into contact with the finger base support guide 6 and the finger tip side support guide 8, the position of the finger in the short axis direction of the finger is adjusted by aligning the center position of the finger in the short direction with the center position guide 9 in the short direction of the finger. (Left and right positions of the finger) are determined. Here, when the finger base support guide 6 and the finger tip side support guide 8 are formed in an R shape reminiscent of the finger placement position, the user can easily understand the finger placement position.

以上のように、指の置き位置を規制する「また」位置ガイド７、指根元支えガイド６、指先端側支えガイド８、指短手方向中心位置ガイド９に合わせて指を置くだけで、指の長い人や短い人、爪の長い人や短い人等、個人の身体的バラツキがあっても、認証装置の指設置部に指を置く再の指長軸方向（前後方向）のずれ、指短軸方向（左右方向）のずれ、指の静脈画像撮像部との位置ずれを防止して、毎回の指の撮像面を同一にし指静脈データ読取の再現性を高めることができる。 As described above, by simply placing the finger in accordance with the “middle” position guide 7, the finger base support guide 6, the finger tip side support guide 8, and the finger lateral direction center position guide 9 that regulate the finger placement position, Even if there is a physical variation in individuals, such as a long person, a short person, a person with a long nail, or a person with a long nail, the finger is placed on the finger installation part of the authentication device. It is possible to prevent misalignment in the minor axis direction (left and right direction) and positional deviation from the finger image capturing unit of the finger, and to make the finger imaging surface the same every time, thereby improving the reproducibility of finger vein data reading.

また図１〜図４では中指を認証対象指１０にしているが、本発明は開放された平面状のケース形状であることから指を特定する規制がないので、手の指ならば左右全ての指を認証対象指１０にすることができる。例えば手の小さい人や、指の細い人にとっては中指を認証対象指１０として、人差し指、薬指との指の付け根の「また」を「また」位置ガイド７に突き当てるより、人差し指を認証対象指１０として、中指との指の付け根の「また」のみ「また」位置ガイド７に突き当てた方が、指を設置し易くなることも考えられる。したがって利用者にとって最も操作し易い指を認証対象指１０に指定可能とすることで、認証装置に指を置く際の位置決めが容易になり、結果として高い再現性を持って指静脈画像を取得することができ高い認証精度を得ることができる。 1 to 4, the middle finger is the authentication target finger 10, but since the present invention has an open planar case shape, there is no restriction to specify the finger, so if it is a finger of the hand, all right and left The finger can be the authentication target finger 10. For example, for a person with a small hand or a person with a thin finger, the middle finger is used as the authentication target finger 10, and the index finger or the ring finger and the base of the index finger or the ring finger are brought into contact with the position guide 7, and the index finger is used as the authentication target finger. 10, it is also conceivable that it is easier to place a finger when only “or” at the base of the finger with the middle finger abuts against the “position” position guide 7. Therefore, by making it possible to designate the finger that is most easily operated by the user as the authentication target finger 10, positioning when placing the finger on the authentication device is facilitated, and as a result, a finger vein image is obtained with high reproducibility. And high authentication accuracy can be obtained.

以上のように本実施形態によれば、指の静脈画像を利用した個人認証において、指と指の「また」で指を設置する際の位置決めを行い、指の根元半分の指静脈画像データを取得することで、個人の身体的バラツキ、すなわち指や爪の長い人、短い人にとっても高い再現性を持って指静脈画像を取得することができ高い認証精度の個人認証装置を提供することができる。 As described above, according to the present embodiment, in personal authentication using a finger vein image, positioning is performed when a finger is placed with a finger “finger”, and finger vein image data of the base half of the finger is obtained. Obtaining a personal authentication device that can acquire finger vein images with high reproducibility even for individuals with long and short fingers and nails, and with high authentication accuracy it can.

図４は、指根元支えガイド６の形状を指短軸方向（左右方向）に延長した例である。また図５は図４の個人認証装置に指を置いた状態で撮像部を手前側から見た図である。認証対象指１０、例えば中指は図１と同様に置き、認証対象指に隣り合う指１２、例えば人差し指と薬指の根元を前記指根元支えガイド延長部１１に接地することで、認証対象指１０と認証対象指に隣り合う指１２とで「また」位置ガイド７を挟み込むだけでなく、指の付け根の関節を３本分支える状態となり、指の左右方向の回転抑制を向上することができる。ここで、指根元支えガイド延長部１１の形状は指の置き位置を連想させるようなＲ形状としておくことが望ましい。 FIG. 4 shows an example in which the shape of the finger base support guide 6 is extended in the finger short axis direction (left-right direction). FIG. 5 is a view of the imaging unit viewed from the front side with a finger placed on the personal authentication device of FIG. The authentication target finger 10, for example, the middle finger is placed in the same manner as in FIG. 1, and the finger 12 adjacent to the authentication target finger, for example, the base of the index finger and the ring finger is grounded to the finger base support guide extension 11, Not only the position guide 7 is sandwiched between the fingers 12 adjacent to the authentication target finger, but also the three joints at the base of the finger are supported, and the suppression of the rotation of the finger in the left-right direction can be improved. Here, it is desirable that the shape of the finger base support guide extension 11 is an R shape reminiscent of a finger placement position.

個人認証装置の外観斜視図である。It is an external appearance perspective view of a personal authentication device. 図１の個人認証装置に指を置いた状態で撮像部を手前側から見た図である。It is the figure which looked at the image pick-up part from the near side in the state where a finger was put on the personal authentication device of FIG. 図１の個人認証装置に指を置いた状態で撮像部を真上から見た図である。It is the figure which looked at the imaging part from right above in the state where a finger was put on the personal authentication device of FIG. 個人認証装置の他の実施例を示す外観図である。It is an external view which shows the other Example of a personal authentication apparatus. 図４の個人認証装置に指を置いた状態で撮像部を手前側から見た図である。It is the figure which looked at the image pick-up part from the near side in the state where a finger was put on the personal authentication device of FIG.

符号の説明Explanation of symbols

１…上ケース、２…下ケース、３…光源実装部、４…光源照射窓、５…干渉フィルタ、６…指根元支えガイド、７…「また」位置ガイド、８…指先端側支えガイド、９…指短手方向中心位置ガイド、１０…認証対象指、１１…指根元支えガイド延長部、１２…認証対象指に隣り合う指。
DESCRIPTION OF SYMBOLS 1 ... Upper case, 2 ... Lower case, 3 ... Light source mounting part, 4 ... Light source irradiation window, 5 ... Interference filter, 6 ... Finger root support guide, 7 ... "Position" position guide, 8 ... Finger tip side support guide, 9 ... Guide position in the lateral direction of the finger, 10 ... Finger for authentication, 11 ... Finger root support guide extension, 12 ... Finger adjacent to the finger for authentication.

Claims

指の静脈を撮像する撮像装置において、指と指の付け根の「また」の位置を基準にして認証対象指を置くことを特徴とする撮像装置。 An imaging apparatus for imaging a vein of a finger, wherein the authentication target finger is placed on the basis of the position of the finger and the base of the finger.

請求項１記載の撮像装置において、指と指の付け根の「また」の位置を決める突起部を有することを特徴とする撮像装置。 The imaging apparatus according to claim 1, further comprising a protrusion that determines a position of a “male” of a finger and a base of the finger.

請求項１記載の撮像装置において、認証対象指の根元を支持する突起部を有することを特徴とする撮像装置。 The imaging apparatus according to claim 1, further comprising a protrusion that supports a root of the finger to be authenticated.

請求項１記載の撮像装置において、指の静脈を撮像する範囲外で指先端側を支持する突起部を有することを特徴とする撮像装置。 The imaging apparatus according to claim 1, further comprising a protrusion that supports a finger tip side outside a range in which a finger vein is imaged.

請求項３記載の撮像装置において、認証対象指だけでなく隣接する片方もしくは両方の指の根元を支持する突起部を設けることを特徴とする撮像装置。
The imaging apparatus according to claim 3, wherein a projection is provided that supports not only the finger to be authenticated but also the root of one or both adjacent fingers.