JPH05266174A - Fingerprint image input device - Google Patents

Fingerprint image input device

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Publication number
JPH05266174A
JPH05266174A JP4065794A JP6579492A JPH05266174A JP H05266174 A JPH05266174 A JP H05266174A JP 4065794 A JP4065794 A JP 4065794A JP 6579492 A JP6579492 A JP 6579492A JP H05266174 A JPH05266174 A JP H05266174A
Authority
JP
Japan
Prior art keywords
fingerprint
guide plate
light guide
input surface
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP4065794A
Other languages
Japanese (ja)
Other versions
JP3100456B2 (en
Inventor
Taku Niizaki
卓 新崎
Seigo Igaki
誠吾 井垣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP04065794A priority Critical patent/JP3100456B2/en
Publication of JPH05266174A publication Critical patent/JPH05266174A/en
Application granted granted Critical
Publication of JP3100456B2 publication Critical patent/JP3100456B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To provide the fingerprint input device which does not malfunction even if intense light is made incident from a fingerprint input surface and the structure in which is not known through the fingerprint input surface by shielding the inside of the device by arranging an optical filter. CONSTITUTION:A light guide plate 2 which has the fingerprint input surface as its top surface is provided, the fingerprint input surface is irradiated by a light source 3 from behind the light guide plate 2, and scattered and reflected light from the unevenness of the fingerprint of a finger placed on the fingerprint input surface is converged by a convergence optical system and imaged to obtain a ridge line pattern image of the fingerprint. In this fingerprint image input device, the optical filter 7 which transmits only specific light is arranged on a proper surface of the light guide plate 2 constituting the fingerprint input surface and the optical filter 7 shields the inside of the device.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、指紋照合システムなど
に用いられる指紋像入力装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint image input device used in a fingerprint collation system or the like.

【0002】[0002]

【従来の技術】個人を識別する方法として指紋照合を行
うシステムが知られている。このような指紋照合システ
ムは重要施設などへの入出管理などに用いられるととも
に、鍵を必要とする所ではどこでも適用され得る。ま
た、このような指紋照合システムは指紋を画像として扱
うのが普通であり、指紋を画像データに変換するための
指紋像入力装置と、登録されている指紋画像データと入
力された指紋画像データとを照合するための照合装置と
から構成されている。
2. Description of the Related Art A fingerprint collation system is known as a method for identifying an individual. Such a fingerprint collation system is used for entry / exit management of important facilities and the like, and can be applied wherever a key is required. Further, such a fingerprint collation system usually handles a fingerprint as an image, and a fingerprint image input device for converting the fingerprint into image data, registered fingerprint image data, and input fingerprint image data. And a collation device for collating.

【0003】照合装置には図5に示すような個々人の指
紋画像データ(指紋特徴点データ)が予め記憶登録され
ており、この記憶登録されている指紋画像データと、図
6に示す入力指紋画像データとのパターンマッチングを
図7のように行い、両者の指紋の分岐点や端点などの特
徴点の分布、指紋の形状などの一致・不一致を判定する
ことにより指紋の照合を行う。
Fingerprint image data (fingerprint feature point data) of an individual as shown in FIG. 5 is stored and registered in advance in the collating device. The fingerprint image data stored and registered and the input fingerprint image shown in FIG. The pattern matching with the data is performed as shown in FIG. 7, and the fingerprints are collated by determining the matching / mismatching of the distribution of feature points such as branch points and end points of the fingerprints of both the fingerprints, and the shape of the fingerprints.

【0004】図8は前記指紋照合システムに使用されて
いる従来の指紋像入力装置の一例を示す。図において、
1は指、2は指紋入力面を構成する導光板、3は指照射
用の光源、4は結像用のレンズ、5はCCDなどのイメ
ージセンサ、Cは装置ケースである。
FIG. 8 shows an example of a conventional fingerprint image input device used in the fingerprint collation system. In the figure,
Reference numeral 1 is a finger, 2 is a light guide plate constituting a fingerprint input surface, 3 is a light source for illuminating a finger, 4 is an image forming lens, 5 is an image sensor such as CCD, and C is a device case.

【0005】一般に、指紋像入力装置は、指とガラスと
の光学的な接触を利用し、指紋の隆線パターンを検出す
るように構成されている。すなわち、図8において、指
1を指紋入力面たるガラスなどの導光板2の上面に押し
当てると、指1の指紋の凸部は導光板2に接触するが、
指紋の凹部は接触せずに空洞を形成する。
Generally, a fingerprint image input device is configured to detect a ridge pattern of a fingerprint by utilizing optical contact between a finger and glass. That is, in FIG. 8, when the finger 1 is pressed against the upper surface of the light guide plate 2 such as glass as the fingerprint input surface, the convex portion of the fingerprint of the finger 1 contacts the light guide plate 2,
The fingerprint depressions form cavities without contact.

【0006】そこで、導光板2の裏面に配置した光源3
から光を照射すると、この光は指1の指紋の凹部と凸部
で反射散乱される。指紋の凹部からの反射散乱光は、一
度空気中を通って導光板2に入射するため、裏面側へ突
き抜け、導光板2内で全反射することがない。一方、凸
部からの反射散乱光は、指1から導光板2中に直接球面
波として入射する。そして、その一部が導光板2内での
全反射条件を満足し、導光板2内で全反射を繰り返しな
がら右端へ向かって伝搬していく。この全反射成分をレ
ンズ4などの適当な光学系で集光してイメージセンサ5
上に結像させることにより、図6に示すような指紋の凸
部の隆線パターン像を得ることができる。
Therefore, the light source 3 arranged on the back surface of the light guide plate 2
When the light is emitted from the light source, the light is reflected and scattered by the concave and convex portions of the fingerprint of the finger 1. Since the reflected and scattered light from the concave portion of the fingerprint once passes through the air and enters the light guide plate 2, it does not penetrate through the back surface side and totally reflected inside the light guide plate 2. On the other hand, the reflected and scattered light from the convex portion directly enters the light guide plate 2 from the finger 1 as a spherical wave. Then, a part thereof satisfies the condition for total reflection in the light guide plate 2, and propagates toward the right end while repeating total reflection in the light guide plate 2. The total reflection component is condensed by an appropriate optical system such as the lens 4 and the image sensor 5
By forming an image on the top, a ridge pattern image of the convex portion of the fingerprint as shown in FIG. 6 can be obtained.

【0007】[0007]

【発明が解決しようとする課題】ところで、上記のよう
な従来の指紋像入力装置においては、指紋入力面を構成
する導光板2として透明ガラスを使用しているのが普通
である。したがって、外部から強い光を入射させたとき
は誤動作を起こす可能性がある。さらに、指紋入力面が
透明であることから、これを通して装置内部の構造を知
られる恐れがあり、保安上の問題を有する。
By the way, in the conventional fingerprint image input device as described above, it is usual to use transparent glass as the light guide plate 2 constituting the fingerprint input surface. Therefore, when strong light is incident from the outside, malfunction may occur. Furthermore, since the fingerprint input surface is transparent, the internal structure of the device may be known through the fingerprint input surface, which poses a security problem.

【0008】本発明は前記事情に基づきなされたもの
で、その目的とするところは、指紋入力面から強い光が
入射しても誤動作を起こすおそれがなく、また指紋入力
面を通して装置内部の構造を知られるおそれもない指紋
像入力装置を提供することである。
The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent malfunction even when strong light is incident from the fingerprint input surface, and to improve the internal structure of the device through the fingerprint input surface. It is an object of the present invention to provide a fingerprint image input device that is unlikely to be known.

【0009】[0009]

【課題を解決するための手段】本発明は、上記目的を達
成するため、上面を指紋入力面とされた導光板を備え、
該導光板の裏面側から指紋入力面を光源により照射し、
指紋入力面に置かれた指の指紋の凹凸による散乱反射光
を光学系で集光して結像させることにより指紋の隆線パ
ターン像を得るようにした指紋像入力装置において、前
記指紋入力面を構成する導光板の適宜の面に特定の光の
みを透過させる光学フィルタを配置し、該光学フィルタ
によって装置内部を掩蔽するように構成したものであ
る。
In order to achieve the above object, the present invention comprises a light guide plate having an upper surface as a fingerprint input surface,
The fingerprint input surface is illuminated by a light source from the back side of the light guide plate,
A fingerprint image input device configured to obtain a ridge pattern image of a fingerprint by condensing and forming an image of scattered reflected light due to unevenness of a fingerprint of a finger placed on the fingerprint input surface by an optical system. An optical filter for transmitting only specific light is arranged on an appropriate surface of the light guide plate constituting the above, and the inside of the device is covered by the optical filter.

【0010】[0010]

【作用】指紋入力面を構成する導光板の適宜の面に特定
の光のみを透過させる光学フィルタを配置したことによ
り、指紋入力面を通して不要な外光の入射を防止すると
ともに、装置の内部を見えなくすることができる。
By providing an optical filter that transmits only specific light on an appropriate surface of the light guide plate that constitutes the fingerprint input surface, unnecessary external light is prevented from entering through the fingerprint input surface and the inside of the device is protected. You can make it invisible.

【0011】[0011]

【実施例】図1は本発明の第1実施例を示す。この第1
実施例は、指紋入力面を構成する導光板の上面に所望の
光学フィルタを載置して装置内部を掩蔽するようにした
場合の例を示すものである。
1 shows a first embodiment of the present invention. This first
The embodiment shows an example in which a desired optical filter is placed on the upper surface of the light guide plate constituting the fingerprint input surface so as to cover the inside of the device.

【0012】すなわち、図1(A)は、指紋入力面を構
成する導光板としてプリズム6を採用し、このプリズム
6の上面に赤外透過フィルタ7を載置することにより装
置内部を掩蔽したものである。なお、1は指、3は光源
(赤外光源)、4はレンズ、5はCCDなどのイメージ
センサ、Cは装置ケースである。
That is, in FIG. 1A, a prism 6 is adopted as a light guide plate constituting a fingerprint input surface, and an infrared transmission filter 7 is placed on the upper surface of the prism 6 to cover the inside of the device. Is. 1 is a finger, 3 is a light source (infrared light source), 4 is a lens, 5 is an image sensor such as a CCD, and C is a device case.

【0013】この図1(A)の場合、光源3から放射さ
れた赤外光はプリズム6の右側の面から入射し、直接ま
たは左側の面で反射された後、フィルタ7を介して指1
の指紋の凹凸により反射散乱され、再びプリズム6内に
戻って右側の面から出ていく。プリズム6から出た反射
散乱光はレンズ4によってイメージセンサ5上に指1の
指紋の隆線パターンとして結像される。
In the case of FIG. 1A, the infrared light emitted from the light source 3 is incident on the right side surface of the prism 6 and is reflected directly or on the left side surface, and then is passed through the filter 7 to the finger 1.
The light is reflected and scattered by the unevenness of the fingerprint, returns to the inside of the prism 6 and exits from the surface on the right side. The reflected and scattered light emitted from the prism 6 is imaged on the image sensor 5 by the lens 4 as a ridge pattern of the fingerprint of the finger 1.

【0014】図1(B)は、指紋入力面を構成する導光
板として透明平板8を採用し、この透明平板8の上面に
赤外透過フィルタ7を載置したものである。指1の指紋
の凹凸による反射散乱光は、この透明平板8内で全反射
を繰り返しながらホログラム9の位置まで達し、回折格
子としてのホログラム9により垂直方向に引き出された
後、レンズ4によってイメージセンサ5上に指1の指紋
の隆線パターンとして結像される。
In FIG. 1B, a transparent flat plate 8 is adopted as a light guide plate constituting a fingerprint input surface, and an infrared transmission filter 7 is placed on the upper surface of the transparent flat plate 8. The reflected and scattered light due to the unevenness of the fingerprint of the finger 1 reaches the position of the hologram 9 while repeating the total reflection in the transparent flat plate 8, and is extracted in the vertical direction by the hologram 9 as a diffraction grating, and then is imaged by the lens 4. An image is formed on the surface 5 of the finger 1 as a ridge pattern of the fingerprint of the finger 1.

【0015】図1(C)は、図1(B)の変形であっ
て、透明平板8の左端面に反射ミラー10を形成し、指
1の指紋の凹凸による反射散乱光をこの反射ミラー10
で水平(長さ)方向に導出するようにしたものである。
反射ミラー10で水平方向に導出された反射散乱光は、
絞り11で絞られた後、レンズ4、反射ミラー12によ
ってイメージセンサ5上に指1の指紋の隆線パターンと
して結像される。
FIG. 1 (C) is a modification of FIG. 1 (B), in which a reflective mirror 10 is formed on the left end surface of the transparent flat plate 8, and the reflected scattered light due to the unevenness of the fingerprint of the finger 1 is reflected by this reflective mirror 10.
Is derived in the horizontal (length) direction.
The reflected and scattered light that has been horizontally derived by the reflection mirror 10 is
After being stopped down by the stop 11, the lens 4 and the reflection mirror 12 form an image on the image sensor 5 as a ridge pattern of the fingerprint of the finger 1.

【0016】なお、図1の各例では、フィルタ7として
赤外透過フィルタを採用したが、光源の波長に応じて可
視透過フィルタや帯域フィルタを用いることもできる。
ただし、可視透過フィルタを使用する場合には、掩蔽効
果との関係で、赤側または青側に透過帯域が寄ったもの
を用いることが望ましい。また、帯域フィルタを使用す
る場合には、光源の波長をその透過帯域の中心波長とす
るフィルタを用いることが望ましい。
In each example of FIG. 1, an infrared transmission filter is used as the filter 7, but a visible transmission filter or bandpass filter may be used depending on the wavelength of the light source.
However, when a visible transmission filter is used, it is desirable to use a filter having a transmission band closer to the red side or the blue side in relation to the obscuration effect. When using a bandpass filter, it is desirable to use a filter having the wavelength of the light source as the center wavelength of its transmission band.

【0017】図2は本発明の第2実施例を示す。この第
2実施例は、指紋入力面を構成する導光板として図1
(A)と同様のプリズム6を採用し、このプリズム6の
左右の側面に第1のフィルタ13と第2のフィルタ14
を設けることにより装置内部を掩蔽したものである。
FIG. 2 shows a second embodiment of the present invention. In this second embodiment, a light guide plate forming a fingerprint input surface is shown in FIG.
The prism 6 similar to that of (A) is adopted, and the first filter 13 and the second filter 14 are provided on the left and right side surfaces of the prism 6.
The inside of the device is covered by the provision of.

【0018】図3は本発明の第3実施例を示す。この第
3実施例は、指紋入力面を構成する導光板の下面側にフ
ィルタを配置した場合の例を示すものである。すなわ
ち、図3(A)は、指紋入力面を構成する導光板として
図1(B)と同様な透明平板8を採用し、この透明平板
8の下面にフィルタ15を備えることにより装置内部を
掩蔽したものである。また、図3(B)は、指紋入力面
を構成する導光板として図1(C)と同様な反射ミラー
10を備えた透明平板8を採用し、この透明平板8の下
面にフィルタ16を設けることにより装置内部を掩蔽し
たものである。
FIG. 3 shows a third embodiment of the present invention. The third embodiment shows an example in which a filter is arranged on the lower surface side of the light guide plate constituting the fingerprint input surface. That is, in FIG. 3A, a transparent flat plate 8 similar to that shown in FIG. 1B is adopted as a light guide plate forming a fingerprint input surface, and a filter 15 is provided on the lower surface of the transparent flat plate 8 to cover the inside of the device. It was done. Further, in FIG. 3B, a transparent flat plate 8 having a reflection mirror 10 similar to that of FIG. 1C is adopted as a light guide plate forming a fingerprint input surface, and a filter 16 is provided on the lower surface of the transparent flat plate 8. As a result, the inside of the device is covered.

【0019】図4は本発明の第4実施例を示す。この第
4実施例は、透明平板8とは別体の指乗せ用ガラス17
によって指紋入力面を凸状に形成する場合において、こ
の指乗せ用ガラス17の上面または下面にフィルタ7を
張り合わせるようにした場合の例を示すものである。
FIG. 4 shows a fourth embodiment of the present invention. This fourth embodiment is different from the transparent flat plate 8 in that it has a glass 17 for finger rest.
In the case where the fingerprint input surface is formed in a convex shape by means of the above, an example is shown in which the filter 7 is attached to the upper surface or the lower surface of the finger resting glass 17.

【0020】すなわち、図4(A)(D)は、指乗せ用
ガラス17の上面にフィルタ7を張り合わせた後、透明
平板8上に接着したものである。また、図4(B)
(C)は、これとは逆に、指乗せ用ガラス17の下面に
フィルタ7を張り合わせたものである。このように装置
本体とは別体の指乗せ用ガラス17を用意し、これにフ
ィルタ7を張り合わせることにより、フィルタ7の厚さ
を装置本体とは独立して自由に調整することができ、光
源3からの照明光および指1からの反射散乱光の光量が
低下することのないように、設置場所の条件などに合わ
せてその透過率を調整することができる。
That is, in FIGS. 4A and 4D, the filter 7 is attached to the upper surface of the finger resting glass 17 and then adhered onto the transparent flat plate 8. Also, FIG. 4 (B)
In contrast to this, (C) shows the filter 7 attached to the lower surface of the glass 17 for finger placement. In this way, by preparing the finger resting glass 17 which is separate from the device main body and adhering the filter 7 thereto, the thickness of the filter 7 can be freely adjusted independently of the device main body, The transmittance of the light source 3 and the reflected and scattered light from the finger 1 can be adjusted in accordance with the conditions of the installation place so that the light amount does not decrease.

【0021】[0021]

【発明の効果】以上述べたところから明らかなように、
本発明の指紋像入力装置によるときは、指紋入力面を構
成する導光板の適宜の面に特定の光のみを透過させる光
学フィルタを配置し、該光学フィルタによって装置内部
を掩蔽したので、指紋入力面を通して外光が入り込むこ
とがなくなり、強い光が入射しても誤動作を起こすおそ
れがなくなる。また、指紋入力面を通して装置内部の構
造を知られるおそれもなくなり、保安上の問題も解消す
ることができる。
As is clear from the above description,
According to the fingerprint image input device of the present invention, an optical filter that transmits only specific light is arranged on an appropriate surface of the light guide plate that constitutes the fingerprint input surface, and the inside of the device is covered by the optical filter. External light does not enter through the surface, and malfunction does not occur even when strong light enters. Further, there is no fear that the internal structure of the device is known through the fingerprint input surface, and the security problem can be solved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施例の構成を示す略示側面図で
ある。
FIG. 1 is a schematic side view showing a configuration of a first embodiment of the present invention.

【図2】本発明の第2実施例の構成を示す略示側面図で
ある。
FIG. 2 is a schematic side view showing a configuration of a second embodiment of the present invention.

【図3】本発明の第3実施例の構成を示す略示側面図で
ある。
FIG. 3 is a schematic side view showing the configuration of a third embodiment of the present invention.

【図4】本発明の第4実施例の構成を示す略示側面図で
ある。
FIG. 4 is a schematic side view showing a configuration of a fourth exemplary embodiment of the present invention.

【図5】指紋特徴点データの一例を示す図である。FIG. 5 is a diagram showing an example of fingerprint feature point data.

【図6】入力された指紋の隆線パターン像の一例を示す
図である
FIG. 6 is a diagram showing an example of a ridge pattern image of an input fingerprint.

【図7】指紋特徴点データと入力された指紋の隆線パー
タン像とのパターンマッチング処理の説明図である。
FIG. 7 is an explanatory diagram of pattern matching processing between fingerprint feature point data and an input ridge pattern image of a fingerprint.

【図8】従来の指紋像入力装置の構成を示す略示側面図
である。
FIG. 8 is a schematic side view showing a configuration of a conventional fingerprint image input device.

【符号の説明】[Explanation of symbols]

1 指 2 導光板 3 光源 4 レンズ 5 イメージセンサ 6 プリズム 7 光学フィルタ 8 透明平板 9 ホログラム 10 反射ミラー 11 絞り 12 反射ミラー 13〜16 光学フィルタ 17 指乗せ用ガラス 1 Finger 2 Light guide plate 3 Light source 4 Lens 5 Image sensor 6 Prism 7 Optical filter 8 Transparent flat plate 9 Hologram 10 Reflecting mirror 11 Aperture 12 Reflecting mirror 13-16 Optical filter 17 Glass for finger rest

Claims (6)

【特許請求の範囲】[Claims] 【請求項1】 上面を指紋入力面とされた導光板を備
え、該導光板の裏面側から指紋入力面を光源により照射
し、指紋入力面に置かれた指の指紋の凹凸による散乱反
射光を光学系で集光して結像させることにより指紋の隆
線パターン像を得るようにした指紋像入力装置におい
て、 前記指紋入力面を構成する導光板の適宜の面に特定の光
のみを透過させる光学フィルタを配置し、該光学フィル
タによって装置内部を掩蔽したことを特徴とする指紋像
入力装置。
1. A light guide plate having an upper surface serving as a fingerprint input surface, the fingerprint input surface being illuminated by a light source from the rear surface side of the light guide plate, and scattered reflected light due to unevenness of a fingerprint of a finger placed on the fingerprint input surface. In a fingerprint image input device configured to obtain a ridge pattern image of a fingerprint by condensing and forming an image with an optical system, only specific light is transmitted to an appropriate surface of the light guide plate that constitutes the fingerprint input surface. A fingerprint image input device, characterized in that an optical filter is arranged, and the inside of the device is covered by the optical filter.
【請求項2】 指紋入力面を構成する導光板の上面に光
学フィルタを配置したことを特徴とする請求項1記載の
指紋像入力装置。
2. The fingerprint image input device according to claim 1, wherein an optical filter is arranged on the upper surface of the light guide plate constituting the fingerprint input surface.
【請求項3】 指紋入力面を構成する導光板が透明平板
からなり、該透明平板の下面に光学フィルタを配置した
ことを特徴とする請求項1記載の指紋像入力装置。
3. The fingerprint image input device according to claim 1, wherein the light guide plate constituting the fingerprint input surface is made of a transparent flat plate, and an optical filter is arranged on the lower surface of the transparent flat plate.
【請求項4】 指紋入力面を構成する導光板がプリズム
からなり、該プリズムの指紋入力面となる上面を除く他
のプリズム側面に光学フィルタを配置したことを特徴と
する請求項1記載の指紋像入力装置。
4. The fingerprint according to claim 1, wherein the light guide plate constituting the fingerprint input surface is formed of a prism, and an optical filter is arranged on a side surface of the prism other than an upper surface of the prism which is a fingerprint input surface. Image input device.
【請求項5】 導光板上に指紋入力面となる指乗せ用ガ
ラスを載置し、この指乗せ用ガラスの上面または下面に
光学フィルタを添着したことを特徴とする請求項1記載
の指紋像入力装置。
5. The fingerprint image according to claim 1, wherein a finger-putting glass serving as a fingerprint input surface is placed on the light guide plate, and an optical filter is attached to an upper surface or a lower surface of the finger-putting glass. Input device.
【請求項6】 指紋入力面を照射する光源の波長を光学
フィルタの透過波長領域に設定したことを特徴とする請
求項1〜5のいずれかに記載の指紋像入力装置。
6. The fingerprint image input device according to claim 1, wherein the wavelength of the light source that illuminates the fingerprint input surface is set in the transmission wavelength region of the optical filter.
JP04065794A 1992-03-24 1992-03-24 Fingerprint image input device Expired - Fee Related JP3100456B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04065794A JP3100456B2 (en) 1992-03-24 1992-03-24 Fingerprint image input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04065794A JP3100456B2 (en) 1992-03-24 1992-03-24 Fingerprint image input device

Publications (2)

Publication Number Publication Date
JPH05266174A true JPH05266174A (en) 1993-10-15
JP3100456B2 JP3100456B2 (en) 2000-10-16

Family

ID=13297297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04065794A Expired - Fee Related JP3100456B2 (en) 1992-03-24 1992-03-24 Fingerprint image input device

Country Status (1)

Country Link
JP (1) JP3100456B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6826000B2 (en) * 2001-09-17 2004-11-30 Secugen Corporation Optical fingerprint acquisition apparatus
US6829375B1 (en) 1999-02-03 2004-12-07 Nec Corporation Fingerprint input apparatus
US6950540B2 (en) 2000-01-31 2005-09-27 Nec Corporation Fingerprint apparatus and method
JP2016143292A (en) * 2015-02-03 2016-08-08 光環科技股▲ふん▼有限公司 Optical imaging device for thin biometric authentication 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108582A1 (en) 2010-03-04 2011-09-09 日本電気株式会社 Foreign object assessment device, foreign object assessment method, and foreign object assessment program

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6829375B1 (en) 1999-02-03 2004-12-07 Nec Corporation Fingerprint input apparatus
US7177451B2 (en) 1999-02-03 2007-02-13 Nec Corporation Fingerprint input apparatus
US6950540B2 (en) 2000-01-31 2005-09-27 Nec Corporation Fingerprint apparatus and method
US6826000B2 (en) * 2001-09-17 2004-11-30 Secugen Corporation Optical fingerprint acquisition apparatus
JP2016143292A (en) * 2015-02-03 2016-08-08 光環科技股▲ふん▼有限公司 Optical imaging device for thin biometric authentication 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

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