CN201518134U - In-vivo fingerprint acquiring device - Google Patents
In-vivo fingerprint acquiring device Download PDFInfo
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- CN201518134U CN201518134U CN2009202002538U CN200920200253U CN201518134U CN 201518134 U CN201518134 U CN 201518134U CN 2009202002538 U CN2009202002538 U CN 2009202002538U CN 200920200253 U CN200920200253 U CN 200920200253U CN 201518134 U CN201518134 U CN 201518134U
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- pentaprism
- light source
- fingerprint
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- image sensor
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Abstract
The utility model relates to an in-vivo fingerprint acquiring device comprising an optical fingerprint imaging module and a fingerprint signal processing module. The optical fingerprint imaging module comprises a light source, a prism, an imaging objective lens and an image sensor module comprising an image sensor, which are arranged along a light path; the prism is a pentaprism comprising a sampling surface and a transparent surface which are parallel and opposite to each other as well as an imaging surface opposite to the imaging objective lens; shading layers are coated on other surfaces of the pentaprism respectively; a light source is arranged below the transparent surface of the pentaprism; and a diffusion film is arranged between the shading surface of the pentaprism and the light source. The utility model has the advantages of high imaging quality, error report rate, omnidirectional automatic induction and control and the like.
Description
Technical field
The utility model relates to a kind of biological identification technology, specifically is meant a kind of living fingerprint capturer.
Background technology
Fingerprint recognition is according to the different living body finger print biological characteristic of individual, carry out a kind of bio-identification mode of identity validation and checking, and fingerprint collecting exactly is exactly the core place of this bio-identification mode, fingerprint collecting is the fingerprint imaging process in process in essence, its principle is that to utilize be different according to geometrical property, physical features and the biological characteristic in ridge and valley, plot fingerprint image with the value that obtains different feedback signals, then fingerprint image is being compared, to determine whether the being validated user fingerprint, reached the purpose of security identification.
More common a kind of mode is to adopt the optically detecting imaging method in the current fingerprint collecting, it is delivered to fingerprint optical information by prism and carries out the photosignal conversion on the photoelectric sensor, in conjunction with fingerprint algorithm the fingerprint digital signal is carried out fingerprint recognition by processor then.
But there is following shortcoming in existing commercially available fingerprint recognition product, and main performance has:
(1), light path design is unreasonable, the fingerprint quality of optical imaging is relatively poor, causes the validated user fingerprint to be difficult to by security identification, makes troubles for normal use of user;
(2), in design, for reducing the collecting device energy consumption, when not having the finger contact, fingerprint collecting equipment should be in dormant state, and the finger near the time collecting device open automatically, but finger dormancy of the nothing of traditional design fingerprint collecting equipment and finger are poor near the comparatively complexity or the induction sensitivity of the induction control gear of opening automatically, usually need human finger expressly just can make the fingerprint collecting device start near induction point, fail to realize comprehensive automatic induction control, the commercially available fingerprint collecting equipment of other needs the user to open to press to release the button and could start, automaticity is low, it is not convenient to operate, especially running into some needs the big occasion of fingerprint collecting recognition data amount, and shift knob wastes the precious time repeatedly.
The utility model content
The purpose of this utility model is in order to overcome the shortcoming and defect that prior art exists, and provides a kind of fingerprint collecting quality of optical imaging good, and rate of false alarm is low, and can realize the living fingerprint capturer that comprehensive automatic induction is controlled.
For achieving the above object, the technical solution of the utility model is, include the optical finger print image-forming module, the fingerprint signal processing module, described optical finger print image-forming module includes the light source that is provided with according to light path, prism, image-forming objective lens, image sensor module, this image sensor module includes imageing sensor, described prism is a pentaprism, this pentaprism include be parallel to each other over against sampling face and transparent surface and the imaging surface relative with image-forming objective lens, and be coated with light shield layer on its lap of this pentaprism, described light source is arranged at the transparent surface below of pentaprism, and is provided with diffusion barrier between the transparent surface of this pentaprism and the light source.By this setting, utilize the total reflection principle of pentaprism, formed fingerprint is looked like be the bright image under the dark background, increased the sharpness of imaging, and can offset residual trace on the sampling face of pentaprism to the interference of fingerprint imaging, in addition, between light source and transparent surface, diffusion barrier is set, the light that makes light source send is radiated on the sampling face equably, avoid because of light intensity difference everywhere on the sampling face, and tangible dark space or clear zone appear in the fingerprint pattern that causes imaging, cause information in fingerprint fully not discerned conversion by imageing sensor, the degree of accuracy and the sharpness of fingerprint collecting have been improved, greatly improve acquisition quality of the present utility model and recognition efficiency, in addition, removed sampling face on the pentaprism, transparent surface, other faces outside the imaging surface all scribble light shield layer, can avoid the veiling glare in the external environment condition to enter into the imaging interference that produces in the pentaprism, improve the sharpness and the quality of collection imaging of the present utility model.
Further setting also includes the wireless induction wake module, this wireless induction wake-up mechanism includes the live body induction chip and is connected in wireless induction antenna on the live body induction chip, this wireless induction antenna is the rectangular conductive metal frame adaptive with the sampling face size of pentaprism, and this rectangular conductive metal frame is arranged at week of sampling face of pentaprism along last.By this setting, adopt the rectangular conductive metal framework be located at pentaprism sampling face around, therefore when human finger is pressed sampling face at pentaprism, naturally, finger just drops in the rectangular conductive metal frame, therefore, the wireless induction antenna can all can be sensed finger on the four direction inwardly, thereby induced signal is passed to the live body induction chip to be handled, wake light source of the present utility model, image sensor module and fingerprint signal processing module then up and start, carry out fingerprint collecting and identification.
The data output end that further setting is described image sensor module is connected on the signal input part of fingerprint signal processing module by row's pin.By row's battle array data are transmitted, not only made the data output end of image sensor module and the signal input part of fingerprint signal processing module be connected closely, reduce accident and make mistakes.
Further being provided with is that described imageing sensor is a cmos image sensor.
Further being provided with is that described light source is a high-brightness LED lamp.By this setting, make light source of the present utility model have brightness height, long service life, the advantage of low energy consumption of LED lamp
Description of drawings
Fig. 1 the utility model embodiment partial structurtes exploded view;
Fig. 2 the utility model embodiment functional-block diagram;
Fig. 3 the utility model embodiment wireless induction wake module circuit diagram;
Fig. 4 the utility model embodiment image sensor module circuit diagram;
Fig. 5 the utility model embodiment fingerprint signal processing module circuit diagram;
Fig. 6 the utility model embodiment pentaprism perspective view.
Embodiment
Below by embodiment the utility model is carried out concrete description; only be used for the utility model is further specified; can not be interpreted as the qualification to the utility model protection domain, the technician in this field can make some nonessential improvement and adjustment to the utility model according to the content of above-mentioned utility model.
Embodiment of the present utility model shown in Fig. 1-2, include optical finger print image-forming module 1, fingerprint signal processing module 2, this fingerprint signal processing module 2 of the utility model adopts the DSP digital signal processor to carry out in conjunction with fingerprint algorithm the processing and identification of fingerprint signal, as shown in Figure 5, described optical finger print image-forming module 1 includes the light source 11 that is provided with according to light path, prism 12, image-forming objective lens 13, image sensor module 14, this light source 11 of present embodiment is a high-brightness LED lamp, has the brightness height, long service life, advantage of low energy consumption, described image sensor module 14 includes imageing sensor 141, described prism 12 is a pentaprism 12, this pentaprism 12 include be parallel to each other over against sampling face 121 and transparent surface 122 and the imaging surface 123 relative with image-forming objective lens, and be coated with light shield layer 124 on its lap of this pentaprism, described light source 11 is arranged at transparent surface 122 belows of pentaprism 12, and is provided with diffusion barrier 15 between the transparent surface 122 of this pentaprism and the light source 11.The described imageing sensor 141 of present embodiment is a cmos image sensor 141, and these image sensor module 14 circuit diagrams as shown in Figure 4.
The utility model utilizes the total reflection principle of pentaprism, formed fingerprint is looked like be the bright image under the dark background, increased the sharpness of imaging, and can offset residual trace on the sampling face 121 of pentaprism to the interference of fingerprint imaging, in addition, between light source 11 and transparent surface 122, diffusion barrier 15 is set, the light that makes light source 11 send is radiated on the sampling face 121 equably, avoid because of light intensity difference everywhere on the sampling face 121, and tangible dark space or clear zone appear in the fingerprint pattern that causes imaging, cause information in fingerprint fully not discerned conversion by imageing sensor, the degree of accuracy and the sharpness of fingerprint collecting have been improved, acquisition quality of the present utility model and recognition efficiency have greatly been improved, in addition, remove sampling face 121 on the pentaprism 12, transparent surface 122, other faces outside the imaging surface 123 all scribble light shield layer 124, can avoid the veiling glare in the external environment condition to enter into the imaging interference that produces in the pentaprism, have improved the sharpness and the quality of collection imaging of the present utility model.
In addition, as shown in Figure 3, present embodiment includes wireless induction wake module 3, this wireless induction wake-up mechanism 3 includes live body induction chip 31 and is connected in wireless induction antenna 32 on the live body induction chip, this wireless induction antenna 32 is the rectangular conductive metal frame 32 adaptive with sampling face 121 sizes of pentaprism 12, this rectangular conductive metal frame 32 be arranged at pentaprism sampling face around.It is the live body induction chip of ADA03 that the described live body induction chip of present embodiment 31 adopts models, and described rectangular conductive metal frame 32 can adopt high-qualityly to be mixed the one-shot forming of phosphor-copper material and make.
The utility model adopt rectangular conductive metal frame 32 be erected at pentaprism 12 sampling face 121 around, therefore when human finger is pressed sampling face 121 at pentaprism, naturally, finger just drops in the rectangular conductive metal frame 32, therefore, all can sense finger on wireless induction antenna 32 four direction inwardly, realize induction in all directions, thereby induced signal is passed to live body induction chip 31 to be handled, wake light source 11 of the present utility model, image sensor module 14 and fingerprint signal processing module 2 then up and start, carry out fingerprint collecting and identification.
In addition, present embodiment, the data output end of described image sensor module 14 is connected on the signal input part of fingerprint signal processing module 2 by row's pin.By row's battle array data are transmitted, not only made the data output end of image sensor module 14 and the signal input part of fingerprint signal processing module 2 be connected closely, reduce accident and make mistakes.
Claims (5)
1. living fingerprint capturer, include the optical finger print image-forming module, the fingerprint signal processing module, described optical finger print image-forming module includes the light source that is provided with according to light path, prism, image-forming objective lens, image sensor module, this image sensor module includes imageing sensor, it is characterized in that: described prism is a pentaprism, this pentaprism include be parallel to each other over against sampling face and transparent surface and the imaging surface relative with image-forming objective lens, and be coated with light shield layer on its lap of this pentaprism, described light source is arranged at the transparent surface below of pentaprism, and is provided with diffusion barrier between the transparent surface of this pentaprism and the light source.
2. living fingerprint capturer according to claim 1, it is characterized in that: also include the wireless induction wake module, this wireless induction wake-up mechanism includes the live body induction chip and is connected in wireless induction antenna on the live body induction chip, this wireless induction antenna is the rectangular conductive metal frame adaptive with the sampling face size of pentaprism, this rectangular conductive metal frame be arranged at pentaprism sampling face around.
3. living fingerprint capturer according to claim 1 and 2 is characterized in that: the data output end of described image sensor module is connected on the signal input part of fingerprint signal processing module by row's pin.
4. living fingerprint capturer according to claim 3 is characterized in that: described imageing sensor is a cmos image sensor.
5. living fingerprint capturer according to claim 4 is characterized in that: described light source is a high-brightness LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202002538U CN201518134U (en) | 2009-11-06 | 2009-11-06 | In-vivo fingerprint acquiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202002538U CN201518134U (en) | 2009-11-06 | 2009-11-06 | In-vivo fingerprint acquiring device |
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| Publication Number | Publication Date |
|---|---|
| CN201518134U true CN201518134U (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202002538U Expired - Fee Related CN201518134U (en) | 2009-11-06 | 2009-11-06 | In-vivo fingerprint acquiring device |
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| CN (1) | CN201518134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663381A (en) * | 2012-04-06 | 2012-09-12 | 天津理工大学 | System for collecting single fingerprints with low distortion and method for lowering trapezium distortion |
| CN103577821A (en) * | 2013-09-19 | 2014-02-12 | 无锡指网生物识别科技有限公司 | Fingerprint module |
-
2009
- 2009-11-06 CN CN2009202002538U patent/CN201518134U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663381A (en) * | 2012-04-06 | 2012-09-12 | 天津理工大学 | System for collecting single fingerprints with low distortion and method for lowering trapezium distortion |
| CN102663381B (en) * | 2012-04-06 | 2014-04-23 | 天津理工大学 | System for collecting single fingerprints with low distortion and method for lowering trapezium distortion |
| CN103577821A (en) * | 2013-09-19 | 2014-02-12 | 无锡指网生物识别科技有限公司 | Fingerprint module |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100630 Termination date: 20121106 |