JP2945020B2 - Fingerprint image input device - Google Patents
Fingerprint image input deviceInfo
- Publication number
- JP2945020B2 JP2945020B2 JP63331560A JP33156088A JP2945020B2 JP 2945020 B2 JP2945020 B2 JP 2945020B2 JP 63331560 A JP63331560 A JP 63331560A JP 33156088 A JP33156088 A JP 33156088A JP 2945020 B2 JP2945020 B2 JP 2945020B2
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- Prior art keywords
- fingerprint
- fingerprint image
- image input
- image
- light guide
- Prior art date
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Description
【発明の詳細な説明】 〔概要〕 指紋を登録したり、すでに登録されている指紋像と照
合とするために、指紋像を入力する装置に関し、 導光体を用いて指紋像を入力し、検出面に導いて結像
させる装置における台形歪を解消し、正確に指紋像入力
を行なえるようにすることを目的とし、 導光体の指紋像入力部に指紋部を押捺した際の指紋隆
線を二次光源として用い、指紋隆線パターンを検出する
指紋像入力装置において、 該導光体の指紋像入力部と結像との間の光学系に、プ
リズム等のように光学的な距離を制御できる光学素子を
配置することで、結像距離や結像倍率を制御するように
構成する。DETAILED DESCRIPTION OF THE INVENTION [Overview] The present invention relates to a device for inputting a fingerprint image in order to register a fingerprint or collate with a fingerprint image already registered. The purpose of this device is to eliminate trapezoidal distortion in a device that forms an image by guiding it to the detection surface, and to enable accurate fingerprint image input. In a fingerprint image input device that uses a line as a secondary light source and detects a fingerprint ridge pattern, an optical system such as a prism is provided in an optical system between the fingerprint image input unit of the light guide and the image. By arranging an optical element that can control the imaging distance, the imaging distance and the imaging magnification are controlled.
本発明は、指紋を登録したり、すでに登録されている
指紋像と照合するために、指紋像を入力する装置に関す
る。The present invention relates to a device for inputting a fingerprint image in order to register a fingerprint or collate with a fingerprint image that has already been registered.
〔従来の技術〕 近年、電子計算機が社会全般に普及するのに伴い、安
全性（セキュリティ）を如何に確保するかという点に世
間の関心が集まっている。例えば、電算機室への入室や
端末機利用の際の本人確認の手段として、IDカードや暗
証番号が用いられてきたが、安全確保の面から多くの疑
問が提起されている。これに対して指紋は、「万人不
同」・「終生不変」という二大特徴を持つため、本人確
認の最も有力な手段と考えられ、指紋を用いた簡便な個
人照合システムに関連して、多くの研究開発が行われて
いる。[Prior Art] In recent years, with the spread of electronic computers throughout society, public attention has been focused on how to ensure safety (security). For example, ID cards and personal identification numbers have been used as means for personal identification when entering a computer room or using a terminal, but many questions have been raised in terms of ensuring security. On the other hand, fingerprints are considered to be the most powerful means of identity verification because they have two major characteristics: "everyone is unidentified" and "lifelong invariant". In connection with a simple personal verification system using fingerprints, Much research and development is underway.
このように個人の識別法として、指紋の照合を行うシ
ステムにおいては、指紋を画像として取り扱うのが通常
で、指紋を画像データに変換する入力装置が必要とな
る。指紋は凹凸パターンであり、この凹凸パターンの検
出、認識は、第５図に示すような原理で行なわれる。１
は透明平板から成る導光体であり、指先２の指紋部分
を、導光体１の指紋像入力部９に押し当てると、指紋の
凸部（隆線部）は接触するが凹部（谷線）は接触しな
い。As described above, in a system for collating a fingerprint as a method for identifying an individual, a fingerprint is usually handled as an image, and an input device for converting the fingerprint into image data is required. The fingerprint is an uneven pattern, and the detection and recognition of the uneven pattern are performed according to the principle shown in FIG. 1
Is a light guide made of a transparent flat plate. When the fingerprint portion of the fingertip 2 is pressed against the fingerprint image input section 9 of the light guide 1, the convex portion (ridge portion) of the fingerprint comes into contact with the concave portion (valley line). ) Does not touch.
光源３によって、導光体１中に光を入射して、指紋を
押し当てた平面を照明すると、光は指表面・内部で反射
散乱される。指の凹部からの散乱光は、一度空気中を通
り導光体１に入射するため、導光体１中を全反射し伝播
する成分は存在しない。When light is incident on the light guide 1 by the light source 3 to illuminate the plane against which the fingerprint is pressed, the light is reflected and scattered on the surface and inside of the finger. Since the scattered light from the concave portion of the finger once passes through the air and enters the light guide 1, there is no component that is totally reflected and propagated in the light guide 1.
ところが、凸部からの反射・散乱光は、指から直接導
光体１中に球面波として入射し、その一部は導光体１中
での全反射条件を満足し、導光体１中で全反射を繰り返
し伝播してゆく。この全反射成分を、適当な光学系４で
結像させ、イメージセンサ５で検出すると、凸（隆線）
パターンの像を得ることが出来る。However, the reflected / scattered light from the convex portion is directly incident on the light guide 1 as a spherical wave from the finger, and a part of the light satisfies the condition of total reflection in the light guide 1, and And the total reflection is repeatedly propagated. When this total reflection component is imaged by an appropriate optical system 4 and detected by the image sensor 5, a convex (ridge) is formed.
An image of the pattern can be obtained.
この装置では、各光学素子が分離しているため、光学
系が大形になると共に、光路中において空気とガラス間
の界面のように屈折率の異なる面が多く、収差が大き
い。In this device, since each optical element is separated, the size of the optical system becomes large, and there are many surfaces having different refractive indexes such as an interface between air and glass in an optical path, and the aberration is large.
第６図は指紋像入力装置の構成を小型化かつ簡素化す
ると共に収差を少なくするために、導光体１の端部に単
一球面レンズ６を貼り合わせた構造に成っている。FIG. 6 shows a structure in which a single spherical lens 6 is attached to the end of the light guide 1 in order to reduce the size and simplification of the configuration of the fingerprint image input device and reduce aberrations.
指紋の凸部からの反射・散乱光は球面波であるため、
単一の球面レンズを用いて収差のない結像をさせるに
は、第６図のように凸レンズ６の曲率中心に、開口絞り
７を配設することが有効であり、本発明の出願人から特
願昭63−155670として提案さている。なお８は、指紋像
入力部９から到来した光を、単一球面レンズ６側に導く
ミラーである。Since the reflected and scattered light from the convex part of the fingerprint is a spherical wave,
In order to form an aberration-free image using a single spherical lens, it is effective to dispose an aperture stop 7 at the center of curvature of the convex lens 6 as shown in FIG. It has been proposed as Japanese Patent Application No. 63-155670. Reference numeral 8 denotes a mirror that guides light coming from the fingerprint image input unit 9 to the single spherical lens 6 side.
光源３によって指紋像入力部９が照明されることで、
指紋像入力部９における指紋の隆線部が二次光源とな
り、光源体１中で全反射を繰り返すと共に、ミラー８で
単一球面レンズ６側に導かれ、イメージセンサ５の結像
面5a上に結像する。When the fingerprint image input unit 9 is illuminated by the light source 3,
The ridge of the fingerprint in the fingerprint image input unit 9 serves as a secondary light source, and is repeatedly subjected to total reflection in the light source 1, is guided to the single spherical lens 6 by the mirror 8, and is located on the imaging surface 5 a of the image sensor 5. Image.
指紋像入力部９における指紋像から結像面5aまでの光
路を展開して側面図で示すと、第７図のようになる。こ
のように光路を展開して示すと、指紋像入力面９が傾い
た恰好となるため、レンズ６までの光路長が各位置で異
なり、その結果結像面5a上での大きさが、L2≠L2′とな
り、像の歪みが生じる。FIG. 7 is a side view showing an expanded optical path from the fingerprint image to the image forming surface 5a in the fingerprint image input unit 9. When the optical path is developed and shown in this manner, the fingerprint image input surface 9 looks like a slant, and the optical path length to the lens 6 differs at each position. As a result, the size on the image forming surface 5a is L2. ≠ L2 ′, resulting in image distortion.
第８図は、第７図の光路展開図を上から見た図であ
る。指紋像入力面において、正方形の像ａ−ｂ−ｃ−ｄ
が存在しているものとすると、結像面5a上では、ａ′−
ｂ′−ｃ′−ｄ′のように台形状に歪んだ像となる。FIG. 8 is a view of the development of the optical path in FIG. 7 as viewed from above. On the fingerprint image input surface, a square image abcd
Is present on the image plane 5a, a′−
An image is distorted in a trapezoidal shape like b'-c'-d '.
このように従来の指紋像入力装置では、台形歪が避け
られないため、本発明の技術的課題は、導光体を用いて
指紋総の入力し、検出面に導いて結像させる装置におけ
る台形歪を解消し、正確に指紋像入力を行なえるように
することにある。As described above, in the conventional fingerprint image input device, trapezoidal distortion is unavoidable. Therefore, the technical problem of the present invention is to input a total fingerprint using a light guide and guide the trapezoidal shape in a device that forms an image by guiding it to a detection surface. An object of the present invention is to eliminate distortion and enable accurate fingerprint image input.
第１図は本発明による指紋像入力装置の基本原理を説
明するために光路を展開して示す図である。１は導光体
であり、指紋像入力部９に、指先２の指紋部を押捺す
る。この指紋像入力部９に指紋部を押捺した際の指紋隆
線を二次光源として用い、結像面5aにレンズ11により結
像させ検出することで、指紋隆線パターンの検出が行な
われる。FIG. 1 is an expanded view of an optical path for explaining the basic principle of a fingerprint image input device according to the present invention. Reference numeral 1 denotes a light guide, which impresses the fingerprint portion of the fingertip 2 on the fingerprint image input unit 9. The fingerprint ridge formed when the fingerprint portion is imprinted on the fingerprint image input unit 9 is used as a secondary light source, and the fingerprint ridge pattern is detected by forming an image on the imaging surface 5a by the lens 11 and detecting it.
この装置における結像距離や結像倍率を制御するため
に、該導光部１の指紋像入力部９と結像面5aとの間に光
学系中に、指紋像入力部９から結像面5aまでの光路長の
短い側に光路長延長部位が配置されるように、新たにプ
リズム等のように光学的な距離を制御できる光学素子10
が配置されている。In order to control the image forming distance and the image forming magnification in this device, an optical system is provided between the fingerprint image input unit 9 of the light guide unit 1 and the image forming surface 5a. An optical element 10 that can newly control the optical distance, such as a prism, so that the optical path length extension portion is arranged on the shorter side of the optical path length up to 5a.
Is arranged.
指紋像入力部９において指紋の凸部から反射した二次
光源光は、導光体中で全反射を繰り返して、レンズ６、
光学素子10、結像レンズ11を透過し、イメージセンサな
どの検出面5aに結像する。The secondary light source light reflected from the convex part of the fingerprint in the fingerprint image input unit 9 repeats total reflection in the light guide, and the lens 6,
The light passes through the optical element 10 and the imaging lens 11, and forms an image on a detection surface 5a such as an image sensor.
光学素子10は、その部位に応じて、光学的な光路長を
制御できる。本発明では、第７図における指紋像入力部
９から結像面5aまでの光路長の短い側に、光学素子10の
光路長延長部位が配置されているため、指紋像入力部か
ら結像面5aまでの光学的な距離が、全ての位置で同等と
なる。The optical element 10 can control an optical path length in accordance with the position. In the present invention, since the optical path length extension portion of the optical element 10 is disposed on the shorter side of the optical path length from the fingerprint image input unit 9 to the imaging plane 5a in FIG. The optical distance to 5a is equal at all positions.
その結果、結像面5a上の位置における結像倍率が同等
となり、台形状の歪は発生しない。As a result, the imaging magnification at the position on the imaging plane 5a becomes equal, and trapezoidal distortion does not occur.
次に本発明による指紋像入力装置が実際上どのように
具体化されるかを実施例で説明する。第２図は本発明の
第一実施例を示す側面図である。この実施例は、導光体
１に、ミラー面８とは反対側の面に開口絞り７を設け、
導光体１とは別体にコリメートレンズ12を設けた例であ
る。そして、コリメートレンズ12の次に、プリズム10、
結像レンズ11、イメージセンサ５の順に配設されてい
る。Next, how the fingerprint image input device according to the present invention is actually embodied will be described with reference to embodiments. FIG. 2 is a side view showing the first embodiment of the present invention. In this embodiment, an aperture stop 7 is provided on the surface of the light guide 1 opposite to the mirror surface 8,
This is an example in which a collimating lens 12 is provided separately from the light guide 1. Then, after the collimating lens 12, the prism 10,
The imaging lens 11 and the image sensor 5 are arranged in this order.
指紋像入力部９における指紋凸部から反射した光は、
導光体１内を前反射すると共に、ミラー８で開口絞り７
側に反射され、コリメートレンズ12で平行光となり、プ
リズム10によって、光路長が制御された後は、結像レン
ズ11でイメージセンサ５の結像面5a上に結像する。The light reflected from the fingerprint projection in the fingerprint image input unit 9 is
The light is reflected forward in the light guide 1 and the aperture stop 7 is
The light is reflected to the side, becomes parallel light by the collimating lens 12, and after the optical path length is controlled by the prism 10, an image is formed on the image forming surface 5a of the image sensor 5 by the image forming lens 11.
第３図、第４図は、導光体１の端面に、開口絞り７、
単一球面レンズ６を一体化した例である。FIGS. 3 and 4 show an aperture stop 7 on the end face of the light guide 1.
This is an example in which a single spherical lens 6 is integrated.
第３図の装置は、単一球面レンズ６とイメージセンサ
５との間の空間に、プリズム10が挿入されている。In the device shown in FIG. 3, a prism 10 is inserted in the space between the single spherical lens 6 and the image sensor 5.
この装置において、指先２を指紋像入力部９に押し当
てると、指紋の凸部は導光体１に接触するが凹部は接触
しない。In this device, when the fingertip 2 is pressed against the fingerprint image input unit 9, the convex portion of the fingerprint contacts the light guide 1 but the concave portion does not.
そのため、導光体１を通して、指先２を押し当てた指
紋像入力部９に対し光を照射すると、光は指表面・内部
で反射散乱される。指の凹部からの散乱光は、一度空気
中を通り導光体１に入射するため、導光体１中を全反射
し、伝播する成分は存在しない。ところが、凸部からの
反射・散乱光は、指から直接導光体１中に球面波として
入射し、その一部は導光体の１中での全反射条件を満た
し、導光体１中で全反射を繰り返し伝播していく。Therefore, when light is irradiated through the light guide 1 to the fingerprint image input unit 9 against which the fingertip 2 is pressed, the light is reflected and scattered on the surface and inside of the finger. Since the scattered light from the concave portion of the finger once passes through the air and enters the light guide 1, there is no component that is totally reflected in the light guide 1 and propagates. However, the reflected / scattered light from the convex portion is directly incident on the light guide 1 as a spherical wave from a finger, and a part of the light satisfies the condition of total reflection in the light guide 1, and And the total reflection is repeatedly propagated.
そして、単一球面レンズ６を透過し、プリズム10を通
過する際に、光学的な光路長が均等となるように制御さ
れる。そのため、結像面5a上の各部位における結像距離
が均一となり、台形状の歪みが発生しない。Then, when the light passes through the single spherical lens 6 and passes through the prism 10, the optical path length is controlled to be uniform. Therefore, the imaging distance at each part on the imaging surface 5a becomes uniform, and trapezoidal distortion does not occur.
第３図では、プリズム10が空間に配置されているのに
対し、第４図では、導光体１中に、該導光体１よりも屈
折率ｎの大きなプリズム10が配置されている。結像作用
は、第３図の光学系と同じであり、台形状歪みは発生し
ない。In FIG. 3, the prism 10 is arranged in a space, whereas in FIG. 4, the prism 10 having a larger refractive index n than the light guide 1 is arranged in the light guide 1. The imaging operation is the same as that of the optical system shown in FIG. 3, and no trapezoidal distortion occurs.
以上のように本発明によれば、指紋像入力部９と結像
面5aとの間の光学系中に、指紋像入力部９から結像面5a
までの光路長の短かい側に光路長延長部位が配置される
ように、新たにプリズム等のように光学的光路長制御用
の光学素子10を設けることで、結像距離や結像倍率が、
結像面の全面にわたって均等となるように制御されるた
め、収差を補正でき、同時に台形状の歪みも解消させる
ことができる。その結果、指紋像を新規に登録する際、
あるいはすでに登録されている指紋像と照合する際に、
実質の指紋像により近い正確な指紋像を入力でき、指紋
像入力装置の信頼性が向上する。As described above, according to the present invention, in the optical system between the fingerprint image input unit 9 and the imaging surface 5a, the fingerprint image input unit 9 and the imaging surface 5a
By newly providing an optical element 10 for controlling the optical path length, such as a prism, so that the optical path length extension portion is disposed on the shorter side of the optical path length up to, the imaging distance and the imaging magnification are reduced. ,
Since control is performed so as to be uniform over the entire image forming surface, aberration can be corrected, and trapezoidal distortion can be eliminated at the same time. As a result, when registering a new fingerprint image,
Alternatively, when matching with a fingerprint image that has already been registered,
An accurate fingerprint image closer to a real fingerprint image can be input, and the reliability of the fingerprint image input device is improved.
第１図は本発明による指紋像入力装置の基本原理を説明
するために光路を展開して示す図、第２図は本発明の第
一実施例を示す側面図、第３図は本発明の第二実施例を
示す側面図、第４図は本発明の第三実施例を示す側面図
である。 第５図は従来の指紋像入力装置を示す側面図、第６図は
従来の一体型の指紋像入力装置を示す側面図、第７図は
第６図の指紋像入力装置における光路を展開して示す側
面図、第８図は第７図に示す展開図の上面図である。 図において、１は導光体、２は指先、３は光源、５はイ
メージセンサ、5aは結像面、６は単一球面レンズ、７は
開口絞り、９は指紋像入力部、10は光学的光路長制御用
の光学素子（プリズム）、11は結像レンズをそれぞれ示
す。FIG. 1 is a view showing an expanded optical path for explaining the basic principle of a fingerprint image input device according to the present invention, FIG. 2 is a side view showing a first embodiment of the present invention, and FIG. FIG. 4 is a side view showing a second embodiment, and FIG. 4 is a side view showing a third embodiment of the present invention. FIG. 5 is a side view showing a conventional fingerprint image input device, FIG. 6 is a side view showing a conventional integrated fingerprint image input device, and FIG. 7 is an optical path in the fingerprint image input device of FIG. FIG. 8 is a top view of the developed view shown in FIG. In the figure, 1 is a light guide, 2 is a fingertip, 3 is a light source, 5 is an image sensor, 5a is an imaging surface, 6 is a single spherical lens, 7 is an aperture stop, 9 is a fingerprint image input unit, and 10 is optical. An optical element (prism) for controlling the optical path length, and 11 denotes an imaging lens, respectively.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 池田 弘之 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 (56)参考文献 実開 昭63−99960（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G06T 1/00 A61B 5/10 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Ikeda 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Within Fujitsu Limited (56) References Real-life 1988-99960 (JP, U) (58) Fields investigated (Int.Cl. 6 , DB name) G06T 1/00 A61B 5/10
Claims (1)
部を押捺した際の指紋隆線を二次光源として用い、指紋
隆線パターンをレンズにより結像面（5a）に結像させる
ことで検出する指紋像入力装置において、 該導光体（１）の指紋像入力部（９）と結像面（5a）と
の間の光学系中に、指紋像入力部（９）から結像面（5
a）までの光路長の短い側に光路長延長部位が配置され
るように、プリズム等のように光学的な距離を制御でき
る光学素子（10）を新たに設けることで、結像距離や結
像倍率を制御することを特徴とする指紋像入力装置。A fingerprint ridge formed when a fingerprint portion is imprinted on a fingerprint image input portion (9) of a light guide (1) is used as a secondary light source, and a fingerprint ridge pattern is formed on an image forming surface (5a) by a lens. A fingerprint image input device for detecting a fingerprint image by forming an image on an optical system between a fingerprint image input unit (9) of the light guide (1) and an imaging surface (5a). 9) to the image plane (5
An optical element (10) that can control the optical distance, such as a prism, is newly provided so that the optical path length extension part is arranged on the shorter side of the optical path length up to a), so that the image forming distance and image forming distance can be improved. A fingerprint image input device for controlling an image magnification.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63331560A JP2945020B2 (en) | 1988-12-28 | 1988-12-28 | Fingerprint image input device |
| CA000603337A CA1319433C (en) | 1988-06-23 | 1989-06-20 | Uneven-surface data detection apparatus |
| FI893028A FI893028L (en) | 1988-06-23 | 1989-06-20 | ANORDNING FOER AVKAENNING AV DATA FRAON EN OJAEMN YTA. |
| DE68924929T DE68924929T2 (en) | 1988-06-23 | 1989-06-22 | Device for data acquisition from uneven surfaces. |
| EP89306276A EP0348182B1 (en) | 1988-06-23 | 1989-06-22 | Uneven-surface data detection apparatus |
| KR1019890008709A KR920010481B1 (en) | 1988-06-23 | 1989-06-23 | Uneven surface data detecting apparatus |
| US07/370,768 US4924085A (en) | 1988-06-23 | 1989-06-23 | Uneven-surface data detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63331560A JP2945020B2 (en) | 1988-12-28 | 1988-12-28 | Fingerprint image input device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02176984A JPH02176984A (en) | 1990-07-10 |
| JP2945020B2 true JP2945020B2 (en) | 1999-09-06 |
Family
ID=18245027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63331560A Expired - Fee Related JP2945020B2 (en) | 1988-06-23 | 1988-12-28 | Fingerprint image input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2945020B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0472769B1 (en) * | 1990-08-30 | 1995-10-25 | Maurer Identifikationssysteme Gmbh | Identification means for thumb- or fingerprints |
| JP2929802B2 (en) * | 1991-09-20 | 1999-08-03 | 株式会社デンソー | Fingerprint matching system |
| JPH06274603A (en) * | 1993-03-22 | 1994-09-30 | Toshiba Corp | Finger collating device |
| JP3012138B2 (en) * | 1994-02-04 | 2000-02-21 | 富士通株式会社 | Uneven surface reading device |
| JP3120272B2 (en) * | 1996-12-06 | 2000-12-25 | 株式会社山武 | Fingerprint input device |
| JPH1183459A (en) * | 1997-09-01 | 1999-03-26 | Fujitsu Ltd | Uneven surface information detection device |
| US6870946B1 (en) | 1998-08-06 | 2005-03-22 | Secugen Corporation | Compact optical fingerprint capturing and recognition system |
| US6381347B1 (en) | 1998-11-12 | 2002-04-30 | Secugen | High contrast, low distortion optical acquistion system for image capturing |
| KR100432490B1 (en) * | 2001-09-17 | 2004-05-22 | (주)니트 젠 | Optical fingerprint acquisition apparatus |
| US6867850B2 (en) | 2002-01-17 | 2005-03-15 | Cross Match Technologies, Inc. | Light wedge for illuminating a platen in a print scanner |
| KR20040039856A (en) * | 2002-11-05 | 2004-05-12 | 주식회사 코렌 | Apparatus for recognizing information of live body |
| JP3877748B1 (en) * | 2005-10-28 | 2007-02-07 | 京セラ株式会社 | Biometric authentication device |
| KR100701601B1 (en) * | 2006-03-28 | 2007-04-02 | 인하대학교 산학협력단 | Sensor distortion correction method of heterogeneous fingerprint recognition system |
| JP5079675B2 (en) * | 2008-12-08 | 2012-11-21 | 日立マクセル株式会社 | Biometric information acquisition device, biometric authentication device, light guide, and image acquisition device |
| JP2018005723A (en) * | 2016-07-06 | 2018-01-11 | マクセルホールディングス株式会社 | Biometric authentication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61193042U (en) * | 1985-05-23 | 1986-12-01 |
-
1988
- 1988-12-28 JP JP63331560A patent/JP2945020B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02176984A (en) | 1990-07-10 |
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| LAPS | Cancellation because of no payment of annual fees |