CN2771933Y - Triangular prism fingerprint image collector - Google Patents
Triangular prism fingerprint image collector Download PDFInfo
- Publication number
- CN2771933Y CN2771933Y CN 200520112657 CN200520112657U CN2771933Y CN 2771933 Y CN2771933 Y CN 2771933Y CN 200520112657 CN200520112657 CN 200520112657 CN 200520112657 U CN200520112657 U CN 200520112657U CN 2771933 Y CN2771933 Y CN 2771933Y
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- Prior art keywords
- prism
- transparent elastic
- image collector
- equicrural
- lens
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- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- -1 acryl Chemical group 0.000 claims description 6
- 229920002050 silicone resin Polymers 0.000 abstract description 6
- 239000004925 Acrylic resin Substances 0.000 abstract 1
- 229920000178 Acrylic resin Polymers 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003702 image correction Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 230000004446 light reflex Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to a novel triangular prism fingerprint image collector, which solves the problems that the existing fingerprint image collector is not suitable for the fingerprints of dry hands, wet hands and rough hands, and the image quality is poor. The utility model is composed of an equicrural triangle pole-shaped prism, a light source, a lens and a photoelectric detector, wherein one side equicrural surface of the equicrural triangle pole-shaped prism is an incident surface which is matched and assembled with the light source, the other side equicrural surface of the equicrural triangle pole-shaped prism is an emergent surface which is matched and assembled with the lens and the photoelectric detector, the triquetrous bottom surface opposed to two equicrural surfaces is a collecting surface, and the collecting surface is coated with one layer of transparent elastic resin film additionally; the thickness of the transparent elastic resin film is from 0.2 mm to 1 mm; the apical angle of the equicrural triangle pole-shaped prism is 90 DEG; transparent elastic resin is silicone resin or acrylic resin; the equicrural triangle pole-shaped prism is made of the transparent elastic resin possibly. Compared with the existing fingerprint image collector, the utility model can be suitable for the fingerprints of the dry hands, the wet hands and the rough hands, and the utility model has the advantage of clear, real and high distinguishability images.
Description
Technical field
The utility model relates to a kind of finger print image harvester, particularly relates to a kind of novel triangular prism finger print image collector.
Background technology
Fig. 1 is the structural representation of previously used triangular prism fingerprint image acquisition device.Triangular prism 1 is to be made by glass.Three function faces are respectively: collection face 11, the plane of incidence 12 and exit facet 13.Finger 2 is placed on the collection face 11 of prism 1, and source of parallel light 3 provides illumination for the plane of incidence 12.The incident angle at the plane of incidence 12 places is generally 90 degree, and the incident angle at collection face 11 places is 45 degree.The stria of finger 2 protuberances contacts with collection face 11, and light will be absorbed through finger 2, and the fingerprint groove of pointing on 2 does not contact with collection face 11, forms air layer, and incident ray reflects fully by collection face 11 internal layers.The light of reflection penetrates from exit facet 13, focuses on the image that forms fingerprint through lens 4.In the image, the burr of pointing 2 fingerprints protuberance is dark deeply because of no reflection events light color, and the fingerprint of depression does not reflect incident light fully because of contacting with collection face 11 on the finger, and striped is bright.Lens 4 are incident upon photoelectric detector CMOS 5 surfaces with the optical imagery of fingerprint, demonstrate the fingerprint image of light and shade stripe pattern as the CMOS camera.Comparison realizes fingerprint recognition to this image through computing machine again.
The fingerprint image that the glass triangle prism generates has more defective.Because groups of people's finger drying, burr can not soak into the glass of collector 12, has air buffer, and incident light should absorb and be reflected.Mistake appears in fingerprint image, has caused the fingerprint deficient phenomena.Cause the inaccurate or nonrecognition of identification.When wet finger, stria humidity when fingerprint contacts with collection face is bonded into one collector and stria by the moisture content on the lines of the hand, makes incident light pass collection face and is absorbed by stria.The people of dry fingers need to exhale without a break or with moist towel on finger and in advance finger are got wet in the application of this fingerprint recognition collector, gather fingerprint again.If moisture content too much makes recessed of fingerprint also can produce disappearance.Thereby this prism collector has run into difficulty in fingerprint recognition is used.
From the above as can be seen, a kind of picture quality that can provide of society need is good, is suitable for the fingerprint capturer of dried, wet and coarse hand.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned defective of prior art, the fingerprint that provides a kind of energy to be suitable for dried, wet and coarse hand, and the good novel triangular prism finger print image collector of image quality.
For achieving the above object, the utility model triangular prism finger print image collector, form by isoceles triangle cylindricality prism, light source, lens and photoelectric detector, the central planes such as one side of isoceles triangle cylindricality prism are that central planes such as the equipped light source of the plane of incidence, opposite side are equipped lens of exit facet and photoelectric detector, the triangle bottom surface relative with two central planes such as grade is collection face, and collection face adds and is coated with layer of transparent elastic resin film.Be exactly transparent elastic resin Fu Tu on the collection face of triangular prism, during use the finger contact with resin film.Burr is pressed in the film of transparent elastic, and both soak into mutually, forms one, absorbs incident light.Recessed striped or does not contact with each other with film, and incident light reflexes to lens, photoelectric detector CMOS again through being internally reflected to reflecting surface fully, and clear picture, discrimination height.So design, compare the present invention and common triangular prism fingerprint imaging collector, because of resin-elastomer caves under fingerprint burr pressure, and soak into one with fingerprint, significantly improved the fingerprint image on the photoelectric detector COMS, improve the image quality of imaging acquisition system, also overcome the defective that existing finger print image collector can not be suitable for dried, wet and coarse finger line simultaneously.
As optimization, the transparent elastic thickness of resin film is the 0.2-1 millimeter.So design, help ensureing the overall performance of collector.
As optimization, the drift angle of isoceles triangle cylindricality prism is 90 degree.So design, the light quantity loss is minimum on whole optical path.
As optimization, the transparent elastic resin is organic siliconresin or acryl resin.Organic siliconresin or acryl resin all have more excellent wellability.
A kind of novel triangular prism finger print image collector, form by isoceles triangle cylindricality prism, light source, lens and photoelectric detector, the central planes such as one side of isoceles triangle cylindricality prism are that central planes such as the equipped light source of the plane of incidence, opposite side are equipped lens of exit facet and photoelectric detector, the triangle bottom surface relative with two central planes such as grade is collection face, and isoceles triangle cylindricality prism is made by the transparent elastic resin.This prism is to make with silicon gel or acryl resin perfusion mould, and its body is all consistent with band film prism with performance.So design, the incident light that is provided by light source passes the plane of incidence, arrives collection face, because triangular prism is to be made by the transparent elastic resin material fully, the stria of finger can be pressed in the collection face, and resin soaks into mutually with protruding fingerprint, incident light is absorbed.And finger concave striped does not contact with collection face, has air barrier, and the incident light exit facet that is reflected has fully formed bright striped.Scioptics focus on the photoelectric detector CMOS surface, thereby obtain high-quality fingerprint image.After promptly the triangular prism made from the transparent elastic resin is formed fingerprint capturer, have the characteristics that image is true, clear, resolution is high equally.
As optimization, the transparent elastic resin is organic siliconresin or acryl resin.So design, organic siliconresin or acryl resin all have more excellent wellability.
After adopting technique scheme, the utility model triangular prism finger print image collector is compared with existing finger print image collector, have can be suitable for to do, wetly reach coarse finger line, clear image, truly, advantage that resolution is high.
Description of drawings
Fig. 1 is the structural representation of existing triangular prism fingerprint image acquisition device;
Fig. 2 is the structural representation of first kind of embodiment of the utility model triangular prism finger print image collector;
Fig. 3 is the structural representation of second kind of embodiment of the utility model triangular prism finger print image collector.
Embodiment
Do further explanation below in conjunction with accompanying drawing and instantiation:
Embodiment one, as shown in Figure 2, the utility model triangular prism finger print image collector is made up of right angle isoceles triangle cylindricality prism 1, source of parallel light 3, lens 4 and photoelectric detector 5, the central planes such as one side of isoceles triangle cylindricality prism 1 are that central planes such as the plane of incidence 12 equipped light sources 3, opposite side are exit facet 13 equipped lens 4 and photoelectric detectors 5, the triangle bottom surface relative with two central planes such as grade is collection face 11, collection face 11 adds and is coated with the flexible silicone resin 6 of layer of transparent, and 2 on finger is just by being pressed on the silicone resin 6 during detection.The thickness of transparent elastic resin molding 6 is the 0.2-1 millimeter.Organic siliconresin has two kinds of combinations, and a kind of is one-component, and a kind of is two components.Tu is even levelling in the surface, at room temperature or hot setting, solidifies the back and forms the transparent elastic film layer, and this film shore hardness is 40 to 55, elongation at rupture 〉=100%.Transmittance 〉=90%.This has just formed the triangular prism 1 of tape tree adipose membrane, and this triangular prism 1 is installed in the fingerprint capturer skeleton, forms the fingerprint recognition collector with lens 4, photoelectric detector CMOS 5, light source 3 etc.
It is the collection face 11 Shang Fu Tu one deck rubber-like transparent organic silicon resin films 6 at triangular prism 1, forms new collection face 11, and this novel triangular prism 1 is formed the fingerprint acquisition system of high discrimination.Finger 2 is placed on the collection face 11 of prism 1, and source of parallel light 3 provides direct illumination for the plane of incidence 12, and the incident light at the plane of incidence 12 places is an an angle of 90 degrees.Because of refractive index, the transmittance of refractive index, transmittance and the glass prism of organic siliconresin approaching, therefore resin molding 6 can not propagated any obstruction with the glass prism contact interface to light, for go into, emergent light, being equivalent to interphase disappears, film 6 forms one with prism 1, and the transparent elastic resin has formed the new collection face 11 of prism 1.The parallel radiation light of incident runs into the protuberance burr and is absorbed with new collection face 11 contact portions during by collection face 11.Be pressed into because of burr in 6 layers of the films of transparent elastic, silicone resin film laminar surface and fingerprint bar soak into, and have formed one, do not have air barrier, and light sees through finger 2 and is absorbed no reflection events light.In addition, the groove of finger 2 can not contact with silicone resin film 6, and fully by internal reflection, reflection ray penetrated from exit facet 13 when incident ray was gathered face 11 internal layers by silicone resin film, focused on the image that forms fingerprint through lens 4.The burr color of finger protuberance is dark deeply in the image, and the striped of depression is then bright.Lens 4 are incident upon the optical imagery of fingerprint on the photoelectric detector CMOS 5, reach fingerprint by the computer picture comparison and look other purpose.Lens 4 are calibrated lens, and the fingerprint image that detector C MOS 5 receives is a compressed image, and this compressed image has at least a part to be revised by lens 4.Further image correction is finished by detector C MOS 5, also can be to image rectification in the Computer Processing comparison process.
Embodiment two, as shown in Figure 3, the utility model triangular prism finger print image collector is made up of right angle isoceles triangle cylindricality prism 1, light source 3, lens 4 and photoelectric detector 5, the central planes such as one side of isoceles triangle cylindricality prism 1 are that central planes such as the plane of incidence 12 equipped light sources, opposite side are exit facet 13 equipped lens 4 and photoelectric detectors 5, the triangle bottom surface relative with two central planes such as grade is collection face 11, and triangle cylindricality prism 1 is made by the organic siliconresin of transparent elastic.Its preparation method is to adopt one-component or two component transparent organic silicon gel, according to solidifying the back shore hardness is 40 to 55 standard proportioning, be poured in the mould of triangular prism, consolidated 3 hours through room temperature or high-temperature baking, be solidified into transparent elastic triangular prism solid, be installed in the fingerprint capturer skeleton and form organic siliconresin triangular prism fingerprint image acquisition device with light source 3, lens 4, photoelectric detector COMS 5 etc.
Claims (4)
1, a kind of novel triangular prism finger print image collector, form by isoceles triangle cylindricality prism, light source, lens and photoelectric detector, the central planes such as one side of isoceles triangle cylindricality prism are that central planes such as the equipped light source of the plane of incidence, opposite side are equipped lens of exit facet and photoelectric detector, the triangle bottom surface relative with two central planes such as grade is collection face, it is characterized in that collection face adds to be coated with layer of transparent elastic resin film.
2,, it is characterized in that the transparent elastic thickness of resin film is the 0.2-1 millimeter according to the described finger print image collector of claim 1.
3, according to the described finger print image collector of claim 2, the drift angle that it is characterized in that isoceles triangle cylindricality prism is 90 degree.
4,, it is characterized in that the transparent elastic resin is organic siliconresin or acryl resin according to claim 1,2 or 3 described finger print image collectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520112657 CN2771933Y (en) | 2004-07-07 | 2005-07-07 | Triangular prism fingerprint image collector |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420073091 | 2004-07-07 | ||
| CN200420073091.3 | 2004-07-07 | ||
| CN 200520112657 CN2771933Y (en) | 2004-07-07 | 2005-07-07 | Triangular prism fingerprint image collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2771933Y true CN2771933Y (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520112657 Expired - Fee Related CN2771933Y (en) | 2004-07-07 | 2005-07-07 | Triangular prism fingerprint image collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN2771933Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426648A (en) * | 2011-11-01 | 2012-04-25 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
| CN103057229A (en) * | 2013-01-04 | 2013-04-24 | 国家纳米科学中心 | Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof |
| CN103186796A (en) * | 2011-12-30 | 2013-07-03 | 联想(北京)有限公司 | Texture collection and safety verification method and electronic equipment using texture collection and safety verification method |
| CN104417002A (en) * | 2013-09-09 | 2015-03-18 | 任克军 | Special material for enhancing fingerprint (palm print) collecting effect of living fingerprint (palm print) collecting instrument |
| CN104416997A (en) * | 2013-09-09 | 2015-03-18 | 任克军 | Preparation method of special material for enhancing collecting effect of living fingerprint (palm print) collecting instrument |
-
2005
- 2005-07-07 CN CN 200520112657 patent/CN2771933Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426648A (en) * | 2011-11-01 | 2012-04-25 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
| CN102426648B (en) * | 2011-11-01 | 2013-09-18 | 长春方圆光电技术有限责任公司 | Finger and palm print instrument used for collection of soaked finger and palm prints |
| CN103186796A (en) * | 2011-12-30 | 2013-07-03 | 联想(北京)有限公司 | Texture collection and safety verification method and electronic equipment using texture collection and safety verification method |
| CN103057229A (en) * | 2013-01-04 | 2013-04-24 | 国家纳米科学中心 | Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof |
| CN104417002A (en) * | 2013-09-09 | 2015-03-18 | 任克军 | Special material for enhancing fingerprint (palm print) collecting effect of living fingerprint (palm print) collecting instrument |
| CN104416997A (en) * | 2013-09-09 | 2015-03-18 | 任克军 | Preparation method of special material for enhancing collecting effect of living fingerprint (palm print) collecting instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN ZKSOFTWARE BIOMETRIC IDENTIFICATION TECHN Free format text: FORMER OWNER: CHE QUANHONG Effective date: 20090710 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090710 Address after: Central control building, Xinhua Industrial Zone, five Da Dao, Longgang District, Shenzhen, Buji, China: 518000 Patentee after: Shenzhen Zhongkong Biometrics Technology Co., Ltd. Address before: Room 1008, Pacific International Building, No. 106, Zhichun Road, Beijing, Haidian District: 100086 Patentee before: Che Quanhong |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing central control electronic technology Co., Ltd. Assignor: Shenzhen Zhongkong Biometrics Technology Co., Ltd. Contract record no.: 2013440020031 Denomination of utility model: Triangular prism fingerprint image collector Granted publication date: 20060412 License type: Exclusive License Record date: 20130201 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060412 Termination date: 20130707 |