【発明の詳細な説明】〔産業上の利用分野〕この発明は、指紋による個人識別装置等に利用される指
紋入出力装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fingerprint input/output device used in a fingerprint personal identification device or the like.
第２図は従来の指紋入出力装置を示す構成図であり１図
において、１は光源、２は光源１からの光を拡散させる
光学的拡散板、３は光学装置としてのプリズムを示し、
光学的拡散板２からの光が入射する入射面３ａと、指Ｆ
が置かれ、入射面３ａからの入射光を出射面３ｃへ反射
する反射面３ｂとが設けられている。FIG. 2 is a configuration diagram showing a conventional fingerprint input/output device. In FIG. 1, 1 is a light source, 2 is an optical diffusion plate that diffuses the light from the light source 1, and 3 is a prism as an optical device.
An entrance surface 3a on which light from the optical diffuser plate 2 enters, and a finger F
and a reflecting surface 3b that reflects the incident light from the entrance surface 3a to the exit surface 3c.
４は光学情報を電気信号へ変換する撮像部（変換装置）
としてのテレビカメラ、５はテレビカメラ４からの情報
に基づいて種々の処理を行なう処理装置、６はテレビカ
メラ４からの指紋を表示するモニタテレビを示す。4 is an imaging unit (conversion device) that converts optical information into electrical signals
5 is a processing device that performs various processes based on information from the television camera 4, and 6 is a monitor television that displays fingerprints from the television camera 4.
Ｆａは指紋の凹部、Ｆｂは指紋の凸部を示す。Fa indicates a concave portion of the fingerprint, and Fb indicates a convex portion of the fingerprint.
次に、動作について説明する。Next, the operation will be explained.
光源１からの光は光学的拡散板２で拡散され、プリズム
３の入射面３ａから反射面３ｂに対して一定範囲の角度
で入射し、反射面３ｂと指Ｆの凹部Ｆａ、凸部Ｆｂとの
接触、非接触によって生ずる全反射光と、非全反射光と
に基づく指紋パターンの光学情報（像）が出射面３ｃか
ら出射される。The light from the light source 1 is diffused by the optical diffuser 2, and enters the reflective surface 3b from the incident surface 3a of the prism 3 at an angle within a certain range. Optical information (image) of a fingerprint pattern based on total reflection light and non-total reflection light generated by contact and non-contact is emitted from the emission surface 3c.
そして、出射面３ｃからの光学情報はテレビカメラ４で
電気信号（データ）に変換されるので、処理装置５はデ
ータに基づいて指紋の識別、照合。The optical information from the exit surface 3c is converted into an electrical signal (data) by the television camera 4, and the processing device 5 identifies and verifies the fingerprint based on the data.
記録等を行ない、モニタテレビ６は指紋を表示する。Recording is performed, and the monitor television 6 displays the fingerprint.
上記のような反射面３ｂでの光の反射は、一般に、ガラ
ス、その他の透明物質と空気との界面で。The reflection of light on the reflective surface 3b as described above generally occurs at the interface between glass or other transparent material and air.
入射光の入射角θが臨界角θ。を越えた角度で入射する
と、全反射が起る。これに対し、指Ｆがガラス、その他
の透明物質に密着している部分では、媒質相互の屈折率
の関係によって全反射は発生せず、非全反射となる。The angle of incidence θ of the incident light is the critical angle θ. If the beam is incident at an angle exceeding , total internal reflection will occur. On the other hand, in a portion where the finger F is in close contact with glass or other transparent material, total reflection does not occur due to the relationship between the refractive indexes of the media, resulting in non-total reflection.
そして、反射面：３ｂに置く指Ｆの位置合わせは。And the positioning of the finger F placed on the reflective surface: 3b is as follows.
ガイドによる粗位置合わせの後、モニタテレビ６に表示
される指紋を見て使用者が調整する。After rough positioning using the guide, the user looks at the fingerprint displayed on the monitor television 6 and makes adjustments.
なお、第２図に示した指紋入出力装置と同様なものが、
例えば特願昭５９−１７１１１２号に示されている。Note that a device similar to the fingerprint input/output device shown in Figure 2 is
For example, it is shown in Japanese Patent Application No. 59-171112.
〔発明が解決しようとする問題点〕従来の指紋入出力装置は以上のように構成されているの
で、モニタテレビ６の設置が必要となるため、大形化す
るとともに、高価になるという問題点があった。[Problems to be Solved by the Invention] Since the conventional fingerprint input/output device is configured as described above, it is necessary to install a monitor television 6, which causes the problem that it becomes large and expensive. was there.
この発明は、上記のような問題点を解消するためになさ
れたもので、小形で安価な指紋入出力装置を得ることを
目的とする。This invention was made to solve the above-mentioned problems, and aims to provide a small and inexpensive fingerprint input/output device.
この発明に係る指紋入出力装置は、プリズムから出射さ
れる反射光を撮像部と、ミラーで構成したモニタ部とへ
分割して供給するハーフミラ−を設けたものである。The fingerprint input/output device according to the present invention is provided with a half mirror that divides and supplies reflected light emitted from a prism to an imaging section and a monitor section constituted by a mirror.
この発明におけるハーフミラ−は、反射光を分割し、一
方の反射光をモニタ部へ、他方の反射光をモニタ部へ供
給する。The half mirror in this invention splits reflected light and supplies one reflected light to the monitor section and the other reflected light to the monitor section.
以下、この発明の一実施例を図について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図において、第２図と同一部分には同一符号が付し
てあり、７はプリズム３から出射される反射光を分割す
るハーフミラ−１８，９はハーフミラ−７を透過した反
射光を全反射するミラー、１０は拡大手段としての凸レ
ンズを示す。In FIG. 1, the same parts as in FIG. The reflecting mirror 10 indicates a convex lens as a magnifying means.
なお、モニタ部Ａはミラー８，９と、凸レンズ１０とで
構成される。Note that the monitor section A is composed of mirrors 8 and 9 and a convex lens 10.
次に、動作について説明する。Next, the operation will be explained.
光源１からの光は光学的拡散板２で拡散され。Light from a light source 1 is diffused by an optical diffuser plate 2.
プリズム３の入射面３ａから反射面３ｂに対して一定範
囲の角度で入射し、反射面３ｂと指Ｆの凹部Ｆａｒ凸部
Ｆｔ、との接触、非接触によって生ずる全反射光と、非
全反射光とに基づく指紋パターンの光学情報（像）が出
射面３Ｃから出射される。Totally reflected light and non-totally reflected light are incident on the reflective surface 3b from the incident surface 3a of the prism 3 at a certain range of angles, and are caused by contact or non-contact between the reflective surface 3b and the concave part Far convex part Ft of the finger F. Optical information (image) of the fingerprint pattern based on the light is emitted from the emitting surface 3C.
そして、ハーフミラ−７で反射光は分割され１分割され
た一方の反射光はテレビカメラ４で電気信号（データ）
に変換されるので、処理袋＠５はデータに基づいて指紋
の識別、照合、記録等を行なう。Then, the reflected light is divided by the half mirror 7, and one of the reflected lights is sent to the TV camera 4 as an electrical signal (data).
Therefore, the processing bag@5 performs fingerprint identification, verification, recording, etc. based on the data.
また、ハーフミラ−７で分割された他方の反射光による
像はミラー８，９で操作者（指紋入力者）の見易い位置
へ導かれるとともに、凸レンズ１０で拡大される。The image of the other reflected light divided by the half mirror 7 is guided by mirrors 8 and 9 to a position where it can be easily seen by the operator (fingerprint input person), and is magnified by the convex lens 10.
なお、上記実施例ではモニタ部Ａを構成するために２枚
のミラー８，９を用いた例を示したが、１枚のミラーで
同様に機能する構成とすることができる。Although the above embodiment shows an example in which two mirrors 8 and 9 are used to configure the monitor section A, it is also possible to use a single mirror that functions in the same way.
また、拡大手段として凸レンズ１０を用いた例を示した
が、同様に機能するものであればよく、配置する位置は
第１図の実施例に限定されるものではない。Further, although an example has been shown in which the convex lens 10 is used as the magnifying means, it may be any other device that functions similarly, and the position thereof is not limited to the embodiment shown in FIG.
以上のように、この発明によれば、プリズムから出射さ
れる反射光を撮像部と、ミラーで構成したモニタ部とへ
分割して供給するハーフミラ−を設けたので、モニタ部
が小形化することにより、全体を小形化できるとともに
、安価になるという効果がある。As described above, according to the present invention, since a half mirror is provided that divides and supplies the reflected light emitted from the prism to the imaging section and the monitor section constituted by a mirror, the monitor section can be made smaller. This has the effect of reducing the overall size and cost.
【図面の簡単な説明】第１図はこの発明の一実施例による指紋入出力装置を示
す構成図、第２図は従来の指紋入出力装置を示す構成図
である。図において、１は光源、３はプリズム、３ｂは反射面、
４は撮像部（テレビカメラ）、７はハーフミラ−１８，
９はミラー、１０は拡大手段（凸レンズ）、Ａはモニタ
部、Ｆは指を示す。なお、図中、同一符号は同一、または相当部分を示す。特許出願人 三菱電機株式会社BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a fingerprint input/output device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional fingerprint input/output device. In the figure, 1 is a light source, 3 is a prism, 3b is a reflective surface,
4 is an imaging unit (TV camera), 7 is a half mirror 18,
9 is a mirror, 10 is a magnifying means (convex lens), A is a monitor unit, and F is a finger. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant Mitsubishi Electric Corporation
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62293643AJPH01134687A (en) | 1987-11-20 | 1987-11-20 | Device for inputting and outputting fingerprint |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62293643AJPH01134687A (en) | 1987-11-20 | 1987-11-20 | Device for inputting and outputting fingerprint |
| Publication Number | Publication Date |
|---|---|
| JPH01134687Atrue JPH01134687A (en) | 1989-05-26 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62293643APendingJPH01134687A (en) | 1987-11-20 | 1987-11-20 | Device for inputting and outputting fingerprint |
| Country | Link |
|---|---|
| JP (1) | JPH01134687A (en) |
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|---|---|---|---|---|
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| US6917695B2 (en) | 1998-11-12 | 2005-07-12 | Secugen Corporation | High contrast, low distortion optical acquisition system for image capturing |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6917695B2 (en) | 1998-11-12 | 2005-07-12 | Secugen Corporation | High contrast, low distortion optical acquisition system for image capturing |
| DE10223107A1 (en)* | 2002-05-22 | 2003-12-04 | Zeiss Carl Jena Gmbh | Device for imaging objects |
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