JP5086547B2 - Personal authentication device - Google Patents

Description

  The present invention relates to a personal authentication device that performs personal authentication using a finger vein pattern.

Expectations for personal authentication technology are increasing for the purpose of safe management of property and information. In particular,
Human life body authentication technology to use the part as the key of the body, compared to the management by the conventional personal identification number and key, it has attracted attention because it is less risk of unauthorized exercise of loss or theft and the like. The authentication method using the blood vessel pattern of the finger does not resemble a crime like a fingerprint or irradiates light directly on the eyeball like a mosquito. It has the advantage that it is difficult to counterfeit because it reads the internal features rather than the surface.

  Patent Document 1 discloses a case provided with an insertion part that can insert a fingerprint of one finger toward a lower surface, a light source unit that irradiates transmitted light from the upper surface of the finger, and light for an arbitrary wavelength. A personal authentication apparatus having an interference filter unit having transparency, an imaging unit for imaging transmitted light that has passed through the interference filter unit, and an image processing unit for vein image data of the finger output from the imaging unit is described. Has been.

  In Patent Document 2, in a personal authentication apparatus having a personal registration information input unit and a personal biometric information processing unit, a personal biometric information input unit, an opening lid that covers at least the personal biometric information input unit, and the opening lid A personal authentication having a fixing unit that locks or releases the unit, and a control unit that locks or releases the fixing unit by comparing information input from the personal registration information input unit with a pre-registered personal registration An apparatus is described.

  In Patent Document 3, a finger placement guide for setting a finger position, a light source unit for irradiating the finger with transmitted light, an image capturing unit for capturing the transmitted light, and images captured by the image capturing unit are disclosed. An authentication unit that performs an authentication process, and the finger placement guide includes: an authentication target finger placement guide unit in which a finger to be authenticated is set; It is described in the provided finger authentication device.

  The authentication target finger placement guide unit has an opening corresponding to the optical opening where the authentication target finger is set and authentication is performed, and a base portion of the authentication target finger is along its outer shape. It is described that it has a concave shape.

JP 2004-49705 A JP 2005-128935 A JP 2005-128936 A

  The personal authentication device that uses the finger vein pattern for personal authentication has advantages as described above, and is used in various places such as an environment place, a security place, an IT device, a building, or a welfare place. It has become like this. In this way, as it has been adopted for various purposes, a personal authentication device that is lower in price, smaller in size, and easy to assemble and maintain has been required. An object of the present invention is to provide a personal authentication device that can be used for various purposes in view of such a point, is inexpensive, downsized, and is easy to assemble and maintain.

The present invention includes a light irradiation unit that irradiates light on a finger of a living body, an imaging unit that detects transmitted light from the finger and images a finger vein, and a finger from an image acquired by the imaging unit. In a personal authentication device using a finger vein, comprising: a vein pattern extraction means for extracting a vein pattern; and an image calculation unit that compares the extracted finger vein pattern with a pre-registered finger vein pattern.
The light irradiation unit, the imaging unit, the vein pattern extraction unit, an optional longitudinal section a box for housing the image computing unit to provide a personal authentication apparatus is characterized in that the wells digit shape.

The present invention is further the box body, upper filter, bottom substrate base, the side portions are assembled in three members of the cover, the personal authentication apparatus characterized by being formed in wells digit shape in longitudinal section I will provide a.

The present invention is further internally central space portion of the rectangular shape formed in the portion, the IC chip substrate based IC chip substrate having an IC chip to form the vein pattern extraction means and the image computing unit of the box body along the IC chip board base directly attached to the upper, providing personal authentication apparatus characterized by placing the image pickup unit in a vertical direction toward the filter to the IC chip on the substrate.

The present invention further that pre-Symbol the cover of the vertical alignment to the IC chip board base, horizontal arrangement of the light guide tube constituting the light irradiating portion, and the filter is formed by integral molding A personal authentication device is provided.

The present invention further provides a personal authentication device, wherein the light guide tube is branched into a Y-shape, and the upper ends of the branched light beams are inclined toward the outer side of the finger to be placed .

According to the present invention, a near infrared LED is directly mounted on the substrate base along the substrate base, and light from the near infrared LED irradiates a finger placed through the light guide tube. The personal authentication device is characterized in that the IC chip and the near-infrared LED are connected by a conductive part formed in a substrate, and there is no wiring in the box.

  The present invention provides a personal authentication device that has the above-described configuration, can be used for many purposes, is low in cost, is small in size, and is easy to assemble and maintain.

  Embodiments of the present invention will be described below with reference to the drawings.

1 is a longitudinal sectional view of a personal authentication device 100 according to an embodiment of the present invention, FIG. 2 is a top plan view, FIG. 3 is a back plan view, and FIG. 4 is a bottom view. FIG. 1 shows a longitudinal sectional shape cut by a cutting plane A in FIG. In these figures, the personal identification device 100 includes any of the cut surface, i.e. the box 1 was well digit shape in any longitudinal section.

The box 1 is composed of an integrally formed side cover 2, an upper filter 3, and a lower substrate base 4. In constructing the box 1, nothing other than the cover 2, the filter 3, and the substrate base 4 is required. In other words, the box 1 includes a cover 2, may be formed on the well digit shape in longitudinal section of only the filter 3 and the substrate base 4. When viewed from above, the filter 3 and the substrate base 4 are closed to form a rectangular cube. When the cover 2 is formed in a circular shape, it forms a circular cube. When viewed from above, the shape depends on the shape of the cover 2 as described above. Also, the cover can be formed by molding, and it is easy to make the longitudinal section trapezoidal.

The cover 2 has a rectangular cylindrical shape, and has a pair of filter holding portions 5 formed by grooves inwardly at the upper part, and light guide pipes 6 are formed in a paired shape on the left and right. . A pair-shaped substrate base holding part 7 formed by a groove toward the circle is formed in the lower part.

  A filter (that is, window portion) 3 is attached to the pair of filter holding portions 5 with the horizontal direction horizontal on the paper surface.

  A space 11 is formed in a lower part of the cover 2 along a square, thereby forming an inner wall 12 and an outer wall 13, and the paired substrate base holding part 7 described above is provided on the outer wall 13. The substrate base 4 is attached to the pair-shaped substrate base holder 7. Accordingly, the substrate base 4 is attached to the above-described substrate base holding portion 7 so as to extend to the outside of the inner wall 12.

As shown in FIG. 1, the lower surface portion of the well digit shape is parallel arranged to the substrate base 4 and the filter 3, to form the upper surface portion. Cover 2 is formed in a direction perpendicular to the substrate base 4 and the filter 3, to form the side panels of the wells digit shape.

  Therefore, a regular square can be drawn on the substrate base 4, the filter 3, and the cover 2 in the longitudinal section, and the shape is extremely simple (simple). A light guide tube 30 to be described later is disposed in the light guide tube pipe 6, the upper end of the light guide tube 30 is an irradiation part 34 that is inclined outward, and a flange 15 is formed on the side upper end. It is used as a mounting part when it is attached to other equipment.

  A rectangular cubic space 10 is formed in the central portion of the box 1, that is, in the central portion of the box by the substrate base 4, the filter 3 and the cover 2. It can be seen that the substrate base 4 and the filter 3 are disposed through this space.

  In this space portion 10, an image pickup portion 21 composed of a camera and an IC chip substrate 22 including an IC chip are disposed.

  The IC chip substrate 22 is directly attached to the substrate base 4 and is electrically connected to a conductive portion provided on the substrate base 4. FIG. 5 shows a light guide tube 30 installed in the light guide tube piping 6. In this example, the light guide tube 30 has a Y-shape, and can irradiate light (near infrared rays) from the irradiation units 34 at the two upper ends. An irradiating portion 34 inclined at the upper ends of the branch portions 31 and 32 of the light guide tube 30 outward, more precisely toward the near side and outward in the direction of about 15 ° is formed.

  FIG. 6 shows the degree of inclination. In four directions of about 3 mm, it is inclined 0.5 mm in the direction of approximately 15 ° from the center point to the near side, and is inclined 0.5 mm in the opposite direction. One side of the irradiation unit 34 is about 3 mm square.

  Since the light guide tube 30 has a Y shape, as shown in FIG. 2, the irradiation portions 14 are formed in pairs on the left and right sides. When viewed from the back, the shape is as shown in FIG.

Set by the filter 3 and the light guide tube 30 to the injection molding machine (not shown), it is possible to form the box body 1 to hold the filters 3 and the light guide tube 30 in the cover 2 in a single injection . (However, the substrate base 4 is not connected). In this case, the light guide tube 30 is integrated with the light guide tube pipe. When not integrally molded, the light guide tube 30 is disposed and fixed to the light guide tube pipe 6. After the cover 2, the filter 3 and the light guide tube 30 are integrally formed, the substrate base 4 is attached to the substrate base 4 via the substrate base holding part 7. Further, a cable connector 35 is attached to the substrate base 4.

  In FIG. 1, an IC chip substrate 22 having an IC chip that forms a vein pattern extraction means, an image calculation unit, and other control units in a rectangular space 10 formed in the inner central portion of the box 1 is a substrate base. The image pickup unit 21 is directly mounted on the IC chip substrate 22 in the vertical direction with the filter 3 being directed on the IC chip substrate 22. Further, the IC chip constitutes a control unit that controls the near-infrared LED.

  Near-infrared LEDs 25 are directly attached on the substrate base 4 along the substrate base 4, and the IC chip of the IC chip substrate 22 and the near-infrared LEDs 25 are connected by a conductive portion formed in the substrate. As a result, a feature without wiring in the box 1 is formed.

  As described above, the irradiation part 34 at the upper end of the light guide tube 30 is inclined, so that light can be emitted obliquely outward at 45 ° as shown in FIG. It can be incident well.

Further, since the irradiation part 34 at the upper end of the light guide tube 30 is inclined in the direction of about 15 ° obliquely outward, as shown in FIG. 8, when the finger 90 is placed, the finger 90 is operated by the action of the inclined surface. The merit of making sure to install in the center part arises. A light irradiation morphism unit for irradiating illumination light to the living finger, an imaging unit for detecting to the imaging of the vein of a finger of the transmitted light from the finger, the finger vein pattern from the image acquired by the image pickup unit A finger vein personal authentication device 100 having a vein pattern extracting means for extracting and an image computing unit for comparing the extracted finger vein pattern with a pre-registered finger vein pattern includes the light irradiation unit, the imaging unit, the vein pattern extraction unit configured any longitudinal section of the box body 1 for accommodating the image computing unit has the features as well digit shape.

  Further, a near infrared LED 25 is directly mounted on the substrate base 4 along the substrate base 4, and the IC chip and the near infrared LED 25 are connected by a conductive portion formed in the substrate, and there is no wiring in the box 1. A personal authentication device is configured.

According to the present embodiment, the following effects can be obtained.
1) a near-infrared LED 25 which interconnect is eliminated directly attached to the substrate base, the light guide tube 30 as illustrated in FIG. 1 is in contact with the near-infrared LED 25, the irradiation portion of the cover 2 the upper surface via the light guide tube 30 By guiding the irradiation light to 34 , the conventional LED installed directly under the cover 2 becomes unnecessary, and wiring is eliminated.
2) Easy adjustment of the camera lens of the image pickup unit By attaching the camera on a flat substrate, it is easy to adjust the optical axis and focus of the camera.
3) Easy assembly and maintenance Direct mounting is possible, eliminating wiring and simplifying assembly and maintenance.
4) Set by the integral forming shapes can filter 3 and the light guide tube 30 of the cover 2 to the injection molding machine can manufacture the upper case in a single injection.
5) As a result, a small-sized personal authentication device can be provided at a low price.
6) Creation of light guide tube 30

  By cutting the tip of the light guide tube 30 obliquely, light (near infrared light) can be efficiently incident on the finger 30.

The longitudinal cross-sectional view of the Example of this invention (cross-sectional view of the cut surface A of FIG. 2). FIG. FIG. Bottom view. The perspective view which shows the structure of a light guide tube. The figure which shows the front-end | tip part of a light guide tube. The figure which shows how the light comes out. The figure which shows how to put a finger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Box body, 2 ... Cover, 3 ... Filter, 4 ... Substrate base, 5 ... Filter holding part, 6 ... Light guide pipe piping, 7 ... Substrate base holding part, 10, 11 ... Space part, 12 ... Inner wall, 13 DESCRIPTION OF SYMBOLS ... Outer wall, 21 ... Imaging part, 22 ... IC chip board | substrate, 30 ... Light guide tube, 34 ... Irradiation part, 100 ... Personal authentication apparatus.

Claims (6)

A light irradiating unit that irradiates light on a biological finger, an imaging unit that detects transmitted light from the finger and images a finger vein, and extracts a finger vein pattern from an image acquired by the imaging unit In a personal authentication device using a finger vein, comprising: a vein pattern extracting means for comparing the extracted finger vein pattern with a pre-registered finger vein pattern;
The light irradiator is composed of a light guide tube and an irradiator that is provided at the upper end of the light guide tube and serves as a portion that emits irradiation light.
A box that houses the light irradiation unit, the imaging unit, the vein pattern extraction means, and the image calculation unit is composed of a cover, a filter provided at the upper part, and a substrate base provided at the lower part.
The cover includes a substrate base holding portion, and is integrally molded to hold the filter and the light guide tube,
The substrate base includes a directly attached IC chip substrate and a directly attached near-infrared LED on which the vein pattern extraction unit and the image calculation unit are formed, and the IC chip substrate is directed toward the filter. The imaging unit arranged in the vertical direction is directly attached,
The substrate base is attached to the substrate base holding portion of the cover, the light guide tube contacts the near infrared LED, and the light emitted from the near infrared LED passes through the light guide tube to the light. Led to the irradiation part of the irradiation part,
The personal authentication device , wherein the cover, the filter, and the substrate base form a cross-shaped cube having a horizontal plane and a vertical plane in a longitudinal section . 2. The box according to claim 1, wherein the box is assembled with three members, the upper part is the filter, the lower part is a substrate base on which the IC chip is mounted, and the side part is a cover. Is formed in a square well shape .   3. The IC chip substrate according to claim 2, wherein an IC chip substrate including an IC chip forming the vein pattern extraction means and the image calculation unit is formed in a rectangular space formed in an inner central portion of the box. A personal authentication apparatus characterized in that the image pickup unit is mounted directly on the IC chip substrate base in a vertical direction toward the filter on the IC chip substrate.   3. The cover according to claim 2, wherein the cover arranged in the vertical direction with respect to the IC chip substrate base, the light guide tube arranged in the horizontal direction constituting the light irradiation unit, and the filter are formed integrally. Personal authentication device.   5. The personal authentication device according to claim 4, wherein the light guide tube is branched into a Y shape, and the upper ends of the branched light beams are inclined toward the outer side of the finger to be placed.   In Claim 4, near infrared LED is directly attached along the substrate base on the substrate base, the light from the near infrared LED irradiates the finger placed through the light guide tube, A personal authentication device characterized in that the IC chip and the near-infrared LED are connected by a conductive portion formed in a substrate, and there is no wiring in the box.

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