CN2843341Y - High-resolution prism fingerprint collector - Google Patents
High-resolution prism fingerprint collector Download PDFInfo
- Publication number
- CN2843341Y CN2843341Y CNU2005201426120U CN200520142612U CN2843341Y CN 2843341 Y CN2843341 Y CN 2843341Y CN U2005201426120 U CNU2005201426120 U CN U2005201426120U CN 200520142612 U CN200520142612 U CN 200520142612U CN 2843341 Y CN2843341 Y CN 2843341Y
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- prism
- lens
- light source
- plane
- pipe support
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- 238000007598 dipping method Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000002834 transmittance Methods 0.000 claims description 4
- 230000004313 glare Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract 2
- 238000003384 imaging method Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005457 optimization Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The utility model relates to a high definition triangular prism fingerprint collector, in order to solve the problem of low definition of the existing fingerprint collector, the utility model is composed of a triangular prism, a light source, a lens, a photoelectric detector and a rectangular pipe stand, wherein the upper end of the rectangular pipe stand is provided with a prism stand which is matched and assembled with the prism and the light source, and the middle segment of the rectangular pipe stand is provided with a lens pipe; the lens is arranged in the lens pipe; the lower end of the rectangular pipe stand is provided with a detector seat which is matched and assembled with the photoelectric detector; the long side plane of the triangular prism is a fingerprint collecting plane; the section of the prism is in a right-angled isosceles triangle; an oblique central plane at the right side of the prism is provided with the light source; the oblique central plane below the prism and the plane of the lens are parallel; one side of the induction plane of the photoelectric detector which is same with the side of the light source slopes outwards, and the included angle of the side of the induction plane of the photoelectric detector and the plane of the lens is from 5 DEG to 10 DEG. Compared with the existing collector, the utility model has the advantages of clear and uniform images, low deformation rate and distortion rate, high quality of imaging and high utilization rate of the fingerprint collecting plane, convenient assembly and disassembly of the prism, remote possibility of damage of the prism and the prism stand when the utility model is disassembled and assembled, simple structure and convenient fabrication, convenient installation and use.
Description
Technical field
This utility model relates to a kind of fingerprint image acquisition device, particularly relates to a kind of fine definition triangular prism fingerprint capturer.
Background technology
At present, the most frequently used fingerprint capturer is made up of triangular prism, light source, lens, photoelectric detector and shield ring environmental light and the rectangle pipe support that supports above-mentioned parts, rectangle pipe support upper end is the prism holder of equipped prism and light source, rectangle pipe support stage casing is the lens tube of interior dress lens, rectangle pipe support lower end is the detector seat of equipped photoelectric detector, the long limit face of triangular prism is the fingerprint collecting face, has the lens adjustment hole on the lens tube, also is fitted with the lens hold-down screw on the lens tube.Discover that through inventor's long term investigation this fingerprint image acquisition device exists the fingerprint image definition low,, can not satisfy the needs of user fine definition along with the development of society.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned defective of prior art, and a kind of fine definition triangular prism fingerprint capturer is provided.
For achieving the above object, this utility model fine definition triangular prism fingerprint capturer is by triangular prism, light source, lens, photoelectric detector and shield ring environmental light and the rectangle pipe support that supports above-mentioned parts are formed, rectangle pipe support upper end is the prism holder of equipped prism and light source, rectangle pipe support stage casing is the lens tube of interior dress lens, rectangle pipe support lower end is the detector seat of equipped photoelectric detector, the long limit face of triangular prism is the fingerprint collecting face, its special feature is that prismatical cross section is a right angled isosceles triangle, prism right side oblique girdle plane configuration light source, the plane parallel of prism below oblique girdle plane and lens, one side of the sensitive surface of photoelectric detector and light source homonymy is outward-dipping, and becomes 5-10 degree angle with the lens plane.Design like this adopts isosceles right-angle prism right side oblique girdle plane configuration light source to compare with adopting other triangular prism, and prismatical incident illumination area even and irradiation collection face is big, and prismatical emergent light is more clear; Adopt the plane parallel of prism below oblique girdle plane and lens, one side of the sensitive surface of photoelectric detector and light source homonymy is outward-dipping, and become the technical scheme of 5-10 degree angle with the lens plane, the clear picture of light path by collecting after tilt correcting, evenly, and deformation rate, distortion rate are low.
As optimization, the mesopore cross section of rectangle pipe support between lens and prism is the wide isosceles trapezoid of the narrow opposite side of light source side, the right and left of prism below oblique girdle plane is all taken on the middle hole wall that is placed on the rectangle pipe support with narrow limit, and all take on the middle hole wall that is placed on the rectangle pipe support in the wide mode in the narrow right side, a left side on the both sides, front and back of prism below oblique girdle plane; There is the rectangle loophole of equipped light source on the right side of rectangle pipe support upper end prism holder, and the bottom of going up of prism right side oblique girdle plane all takes on the hole wall that is placed on loophole with narrow limit.So design, on the one hand, the isosceles trapezoid loophole can satisfy the needs (because emitting light path cross section itself just is isosceles trapezoid) of emitting light path, on the other hand, the isosceles trapezoid loophole can provide bigger support area for prism, thereby support the width on limit that condition is provided for reducing other prism greatly, make the rate of blocking on prism limit lower, so can improve the effective rate of utilization of lens optical face, make prismatical running parameter more near theoretical value, significantly improve image quality, fingerprint is adopted long-pending face utilization rate height.
As optimization, light source is a monochromater, and the planar side of lens is coated with the anti-reflection film that can filter out veiling glare beyond the light source and can improve the monochromater transmitance.So design helps improving the fingerprint image definition; The light transmittance of simple glass lens all about 85%, can make light transmittance bring up to more than 90% behind the increase anti-reflection film.
As optimization, light source is a red light source, and the planar side of lens is coated with and can makes the HONGGUANG light transmittance greater than 95% anti-reflection film.So design can obviously improve the fingerprint image definition.
As optimization, light source by circuit board, be installed in light emitting diode on the circuit board, the rectangle lamp box that coats light emitting diode forms, wherein lamp box is formed by being installed in the frame on the circuit board and being installed in the light distribution grid that the organic resin outside the frame makes.So design, the introducing of lamp box can prevent the scattering loss of light source and the influence of environment light source, the introducing of light distribution grid can make light source more even.
As optimization, the front side wall of rectangle pipe support upper end prism holder or rear wall are that the triangle binding is shaped on the projection that can prop up triangular prism in the inboard by the equipped triangle binding of screw.So design, the fastening board-like prism fixed form of triangle is compared with existing bonding fixed form, more convenient prismatical dismounting, and not fragile prism and prism holder during dismounting.
As optimization, projection is one and is positioned at the center of triangle binding.So design helps balance and fixes.
As optimization, the sensitive surface of photoelectric detector becomes 8 degree angles with the lens plane.So design, can improve the distortion rate and the deformation rate of the definition and the reduction image of fingerprint image greatly.
After adopting technique scheme, this utility model fine definition triangular prism fingerprint capturer is compared with existing fingerprint capturer has clear picture, evenly, deformation rate, distortion rate are low, the image quality height, fingerprint collecting face utilization rate height, prism easy accessibility, and not fragile prism and prism holder during dismounting, advantage simple in structure, as conveniently to make and install and use.
Description of drawings
Fig. 1 is the sectional structure sketch map of this utility model fine definition triangular prism fingerprint capturer;
Fig. 2 is the side-looking structural representation of this utility model fine definition triangular prism fingerprint capturer;
Fig. 3 is dismantle a side-looking structural representation behind the triangle binding of this utility model fine definition triangular prism fingerprint capturer;
Fig. 4 is the inside structure sketch map of this utility model fine definition triangular prism fingerprint capturer triangle binding;
Fig. 5 is that the A-A of Fig. 3 is to structural representation.
The specific embodiment
Do further explanation below in conjunction with accompanying drawing and instantiation:
As shown in the figure, this utility model fine definition triangular prism fingerprint capturer is by right angle isoceles triangle prism 1, light source, lens 2, photoelectric detector 3 and shield ring environmental light and the rectangle pipe support 4 that supports above-mentioned parts are formed, rectangle pipe support 4 upper ends are the prism holder of equipped prism 1 and light source, rectangle pipe support 4 stage casings are the lens tube of interior dress lens 2, rectangle pipe support 4 lower ends are the detector seat of equipped photoelectric detector 3, the long limit face of prism 1 is the fingerprint collecting face, prism 1 right side oblique girdle plane configuration light source, the plane parallel of prism 1 below oblique girdle plane and lens 2, one side of the sensitive surface of photoelectric detector 3 and light source homonymy is outward-dipping, and becomes 5 with lens 2 planes, 8 or 10 degree angles.
The mesopore cross section of rectangle pipe support 4 between lens 2 and prism 1 is the wide isosceles trapezoid of the narrow opposite side of light source side, the right and left of prism 1 below oblique girdle plane is all taken on the middle hole wall that is placed on rectangle pipe support 4 with narrow limit, and all take on the middle hole wall that is placed on rectangle pipe support 4 in the wide mode in the narrow right side, a left side on the both sides, front and back of prism 1 below oblique girdle plane; There is the rectangle loophole of equipped light source on the right side of rectangle pipe support 4 upper end prism holders, and the bottom of going up of prism 1 right side oblique girdle plane all takes on the hole wall that is placed on loophole with narrow limit.Described light source is a red light source, and the planar side of lens is coated with and can filters out veiling glare beyond the HONGGUANG and can make the red light source transmitance greater than 95% anti-reflection film.
Light source by circuit board 5, be installed in light emitting diode 6 on the circuit board 5, the rectangle lamp box 7 that coats light emitting diode 6 forms, wherein lamp box 7 is made up of with the light distribution grid 72 that the organic resin that is installed in frame 71 outsides is made the frame 71 that is installed on the circuit board 5.The triangle binding 9 of the front side wall of rectangle pipe support 4 upper end prism holders for being equipped with by screw 8, triangle binding 9 inboards are shaped on the projection 10 that can prop up triangular prism 1.Projection 10 is one and is positioned at the center of triangle binding 9.Rectangle pipe support 4 stage casings have lens adjustment hole 11, and the rectangle pipe support also is fitted with lens hold-down screw 8 on 4 stage casings.Photoelectric detector 3 is made up of photoelectric sensor 31 and panel 32, links to each other by lead 12 between panel 31 and the circuit board 5.The light path that dotted line among Fig. 1 arrives between the photoelectric sensor 31 for finger 13.
Claims (8)
1, a kind of fine definition triangular prism fingerprint capturer, by triangular prism, light source, lens, photoelectric detector and shield ring environmental light and the rectangle pipe support that supports above-mentioned parts are formed, rectangle pipe support upper end is the prism holder of equipped prism and light source, rectangle pipe support stage casing is the lens tube of interior dress lens, rectangle pipe support lower end is the detector seat of equipped photoelectric detector, the long limit face of triangular prism is the fingerprint collecting face, it is characterized in that prismatical cross section is a right angled isosceles triangle, prism right side oblique girdle plane configuration light source, the plane parallel of prism below oblique girdle plane and lens, one side of the sensitive surface of photoelectric detector and light source homonymy is outward-dipping, and becomes 5-10 degree angle with the lens plane.
2, according to the described fingerprint capturer of claim 1, it is characterized in that the mesopore cross section of rectangle pipe support between lens and prism is the wide isosceles trapezoid of the narrow opposite side of light source side, the right and left of prism below oblique girdle plane is all taken on the middle hole wall that is placed on the rectangle pipe support with narrow limit, and all take on the middle hole wall that is placed on the rectangle pipe support in the wide mode in the narrow right side, a left side on the both sides, front and back of prism below oblique girdle plane; There is the rectangle loophole of equipped light source on the right side of rectangle pipe support upper end prism holder, and the bottom of going up of prism right side oblique girdle plane all takes on the hole wall that is placed on loophole with narrow limit.
3, according to the described fingerprint capturer of claim 2, it is characterized in that light source is a monochromater, the planar side of lens is coated with the anti-reflection film that can filter out veiling glare beyond the light source and can improve the monochromater transmitance.
4, according to the described fingerprint capturer of claim 3, it is characterized in that light source is a red light source, the planar side of lens is coated with and can makes the HONGGUANG light transmittance greater than 95% anti-reflection film.
5, according to the described fingerprint capturer of claim 3, it is characterized in that light source by circuit board, be installed in light emitting diode on the circuit board, the rectangle lamp box that coats light emitting diode forms, wherein lamp box is formed by being installed in the frame on the circuit board and being installed in the light distribution grid that the organic resin outside the frame makes.
6, according to claim 1,2,3,4 or 5 described fingerprint capturers, it is characterized in that the front side wall or the triangle binding of rear wall for being equipped with by screw of rectangle pipe support upper end prism holder, the triangle binding is shaped on the projection that can prop up triangular prism in the inboard.
7,, it is characterized in that projection is one and is positioned at the center of triangle binding according to the described fingerprint capturer of claim 6.
8,, it is characterized in that the sensitive surface of photoelectric detector becomes 8 degree angles with the lens plane according to the described fingerprint capturer of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201426120U CN2843341Y (en) | 2005-12-06 | 2005-12-06 | High-resolution prism fingerprint collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201426120U CN2843341Y (en) | 2005-12-06 | 2005-12-06 | High-resolution prism fingerprint collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2843341Y true CN2843341Y (en) | 2006-12-06 |
Family
ID=37485297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201426120U Expired - Fee Related CN2843341Y (en) | 2005-12-06 | 2005-12-06 | High-resolution prism fingerprint collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2843341Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964051A (en) * | 2010-09-16 | 2011-02-02 | 深圳市中控生物识别技术有限公司 | Fingerprint identification device and identification method thereof |
-
2005
- 2005-12-06 CN CNU2005201426120U patent/CN2843341Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964051A (en) * | 2010-09-16 | 2011-02-02 | 深圳市中控生物识别技术有限公司 | Fingerprint identification device and identification method thereof |
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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: 20090703 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090703 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: High-resolution prism fingerprint collector Granted publication date: 20061206 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061206 Termination date: 20141206 |
|
| EXPY | Termination of patent right or utility model |