CN202748803U - Human-body charge induced fingerprint acquiring device - Google Patents
Human-body charge induced fingerprint acquiring device Download PDFInfo
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- CN202748803U CN202748803U CN 201220327616 CN201220327616U CN202748803U CN 202748803 U CN202748803 U CN 202748803U CN 201220327616 CN201220327616 CN 201220327616 CN 201220327616 U CN201220327616 U CN 201220327616U CN 202748803 U CN202748803 U CN 202748803U
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- electric charge
- charge induction
- human body
- acquisition device
- conversion chip
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Abstract
The utility model discloses a human-body charge induced fingerprint acquiring device, which comprises a trapezoid prism, an imaging lens set and a coated reflector arranged between the trapezoid prism and the imaging lens set, wherein a square field lens is arranged in a light path between the trapezoid prism and the coated reflector; the imaging lens set is fixed on a CMOS (Complementary Metal Oxide Semiconductor) circuit board of a photoelectric conversion chip through a lens fixing and focusing base; and a charge inductor and an LED (Light Emitting Diode) lamp are also arranged on the CMOS circuit board of the photoelectric conversion chip. According to the utility model, deformation of fingerprint images is reduced; the effective region of an acquiring surface is increased; definition and high resolution of images are ensured; by adopting the human-body charge inducting technology, when fake fingerprints and non-living body fingerprints are contacted with the acquiring surface, an electronic circuit cannot detect normal charge of human bodies and can give improperly used alarm signals or does not identify and compare; therefore, use, identification and comparison of the faked fingerprints are realized; and the role of distinguishing true and fake fingerprints is played.
Description
Technical field
The utility model relates to the fingerprint identification technology field, relates in particular to a kind of human body electric charge induction fingerprint acquisition device.
Background technology
Fingerprint because it has unchangeable property, uniqueness and convenience, almost becomes the synonym for people's living things feature recognition.Fingerprint refers to the recessed uneven streakline that produces of the positive surface skin epirelief of people's finger tips.The regular arrangement of streakline forms different line types.The starting point of streakline, terminal point, binding site and bifurcation are called the details of fingerprint.Fingerprint identification technology is mapped a people with his fingerprint, compare by his fingerprint of comparison and the fingerprint of pre-save, just can verify his true identity.Everyone (comprising fingerprint) skin lines is different on pattern, breakpoint and point of crossing, that is to say, and be unique, and constant throughout one's life.Rely on this uniqueness and stability, we could create fingerprint identification technology.In recent years, utilize the fingerprint identification technology of computing machine ripe gradually, be applied to gradually a plurality of fields such as access control system, electronic security(ELSEC), ATM (automatic teller machine) system, digital dressing cubicle, personal electric product, ecommerce, work attendance.But also there are some drawbacks in existing technology, and is poor such as imaging effect, volume is large, especially can not judge problem imitation or the non-living body fingerprint, and this has stayed hidden danger for safety of information, property etc.
The utility model content
Fundamental purpose of the present utility model provides a kind of human body electric charge induction fingerprint acquisition device, be intended to judge imitation or the non-living body fingerprint, the harvester imaging effect is good, volume is small and exquisite.
A kind of human body electric charge induction fingerprint acquisition device that the utility model provides, comprise Dove prism and imaging lens group for contact finger, and be arranged between described Dove prism and the imaging lens group, be used for the light of described Dove prism outgoing is reflexed to the coated reflective mirror of described imaging lens group;
Be provided with square field lens in the light path between described Dove prism and the described coated reflective mirror;
Described imaging lens group is fixed on the opto-electronic conversion chip cmos circuit plate by the fixing focusing of camera lens base;
Also be provided with the electric charge induction device for detection of people's volume charge on the described opto-electronic conversion chip cmos circuit plate;
Also be provided be used to the LED lamp that light source is provided on the described opto-electronic conversion chip cmos circuit plate.
Preferably, the first base angle of described Dove prism is 65～70 °, and the second base angle is 50～60 °; The right face in described the first base angle scribbles pitch-dark; The upper bottom surface of described Dove prism is frosted, and being width is the rectangle setting of 3～5mm; The face length of going to the bottom of described Dove prism is 17～21mm, and wide is 15～20mm.
Preferably, the positive light coke setting that described square field lens two apparent surfaces are sphere, the radius-of-curvature of this sphere is 25～35mm; Distance between two sphere summits is 2～10mm: described square field lens frame length is 15～20mm, and wide is 10～15mm.
Preferably, described coated reflective mirror is the square setting that the length of side is 7～15mm, and the angle between this coated reflective mirror and the opto-electronic conversion chip cmos circuit plate is 40～50 °.
Preferably, described imaging lens group comprises at least one optical mirror slip and eyeglass spacer ring, and the diameter of this optical mirror slip is 3～10mm, and the gross thickness of all optical mirror slips is 3～10mm.
Preferably, the fixing focusing of described camera lens base comprises at least two for the reference column that is fixedly connected with described opto-electronic conversion chip cmos circuit plate, and described camera lens fixing focusing base and imaging lens group are threaded connection and regulate first to the position; The fixing focusing of described camera lens base is the setting that the length of side is 5～13mm, and the angle between itself and the described opto-electronic conversion chip cmos circuit plate is 0～8 °.
Preferably, described LED lamp is plug-in unit or paster LED lamp, and its light-emitting area is pointed to the upper bottom surface of described Dove prism, and is 0～20 ° angle setting with described upper bottom surface; Described LED lamp emission wavelength is 380～980nm.
Preferably, described electric charge induction device is fixedly connected with opto-electronic conversion chip cmos circuit plate, and is arranged on described Dove prism one end.
Preferably, described opto-electronic conversion chip cmos circuit plate comprises opto-electronic conversion chip CMOS, electric charge induction chip.
Preferably, it is characterized in that, the wide of described human body electric charge induction fingerprint acquisition device is 15～17mm, and height is 40～55mm, and thick is 15～25mm.
The utility model has adopted the distortion of field lens correcting image, reduced the distortion of fingerprint image, thus increased the face of collection the effective coverage, increased the accuracy of identification.The catoptric system that optical system of the present utility model adopts is provided with reflecting mechanism between field lens and camera lens, reduced the volume of optical facilities, makes structure more short, and volume is smaller and more exquisite, is convenient to the application in later stage.The focusing mode of optical system of the present utility model is to regulate the height of lens set and CMOS light-sensitive surface by lens base thread device, thereby realizes precisely focusing, has guaranteed sharpness and the high resolving power of image, has improved identification precision and speed.What illuminator of the present utility model adopted is plug-in unit or paster LED lamp, and illuminating effect is even, and utilization factor is high, and is simple in structure, and erection welding is convenient.Be fit to large-scale mass production.The human body electric charge induction technology that the utility model adopts, when false fingerprint, non-living body fingerprint contact collection face, electronic circuit can't detect the normal electric charge of human body, provides the alarm signal of non-normal use or does not identify comparison.Thereby that has realized preventing forging fingerprint uses and identifies comparison, has played the function of the fingerprint of distinguishing the true from the false.
Description of drawings
Fig. 1 is the inner structure schematic diagram of the utility model human body electric charge induction fingerprint acquisition device;
Fig. 2 is the one-piece construction schematic diagram of the utility model human body electric charge induction fingerprint acquisition device;
Fig. 3 is the side structure schematic diagram of the utility model human body electric charge induction fingerprint acquisition device.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Be described further with regard to the technical solution of the utility model below in conjunction with drawings and the specific embodiments.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model proposes a kind of human body electric charge induction fingerprint acquisition device.
With reference to Fig. 1, Fig. 1 is the inner structure schematic diagram of the utility model human body electric charge induction fingerprint acquisition device.
In the present embodiment, human body electric charge induction fingerprint acquisition device comprises: Dove prism 10, square field lens 20, coated reflective mirror 30, imaging lens group 40, the fixing focusing of camera lens base 50, opto-electronic conversion chip CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor (CMOS)) circuit board 60, LED lamp 70 and electric charge induction device 80.Wherein, Dove prism 10 is used for contacting with finger 90, to obtain fingerprint.Be provided with the coated reflective mirror 30 that reflexes to imaging lens group 40 for the light with Dove prism 10 outgoing in the light path between Dove prism 10 and imaging lens group 40, be provided with square field lens 20 in the light path between Dove prism 10 and coated reflective mirror 30; Imaging lens group 40 is fixed on the opto-electronic conversion chip cmos circuit plate 60 by the fixing focusing of camera lens base 50; Opto-electronic conversion chip cmos circuit plate 60 is provided be used to the LED lamp 70 that light source is provided with for detection of the electric charge induction device 80 of people's volume charge.
In the above-described embodiments, the first base angle A of Dove prism 10 is 65～70 °, and the second base angle B is 50～60 °; The face 11 that the first base angle A is right scribbles pitch-dark; The upper bottom surface 12 of Dove prism 10 is frosted, and is the rectangle setting that width is 3～5mm; Bottom surface 13 length of Dove prism 10 are 17～21mm, and wide is 15～20mm.These Dove prism 10 preferred H-K9 glass and/or PMMA resin materials of adopting are made.
In the above-described embodiments, the positive light coke setting that 20 liang of apparent surfaces of square field lens are sphere, two spheres are relative with coated reflective mirror 30 with Dove prism 10 respectively, and the radius-of-curvature of this sphere is 25～35mm; Distance between two sphere summits is 2～10mm: the frame length of square field lens 20 is 15～20mm, and wide is 10～15mm.These square field lens 20 preferred glass and/or resin and plastics of adopting are made.
In the above-described embodiments, coated reflective mirror 30 is the square setting that the length of side is 7～15mm, and the angle between this coated reflective mirror 30 and the opto-electronic conversion chip cmos circuit plate 60 is 40～50 °.Coated reflective mirror 30 is the high reflectance reflective mirror.
In the above-described embodiments, imaging lens group 40 comprises at least one optical mirror slip and eyeglass spacer ring, and the diameter of this optical mirror slip is 3～10mm, and the gross thickness of all optical mirror slips is 3～10mm.
In the above-described embodiments, the fixing focusing of camera lens base 50 comprises at least two for the reference column that is fixedly connected with opto-electronic conversion chip cmos circuit plate 60, and the fixing focusing of camera lens base 50 is threaded connection and regulates first to the position with imaging lens group 40; The fixing focusing of camera lens base 50 is the setting that the length of side is 5～13mm, and the angle between itself and the opto-electronic conversion chip cmos circuit plate 60 is 0～8 °.The fixing focusing of the camera lens base 50 preferred black ABS that adopt make.Be provided with high-resolution imaging lens combination 40 between the fixing focusing of coated reflective mirror 30 and the camera lens base 50, it act as fingerprint image is imaged onto on the CMOS light-sensitive surface of high integration opto-electronic conversion chip cmos circuit plate 70, its structure is that inside is provided with at least one optical mirror slip and eyeglass spacer ring, external structure is threaded with the fixing focusing of camera lens base 50 and is connected, be convenient to focusing to reach good sharpness, drive the optical mirror slip group by twisting imaging lens group 40 and move forward and backward, regulate imaging lens group 40 and opto-electronic conversion chip cmos circuit plate 60 relative positions.Thereby realize precisely focusing.
In the above-described embodiments, LED lamp 70 is side luminous plug-in component or bonded LED lamp, and its light-emitting area is pointed to the upper bottom surface 12 of Dove prism, and is 0～20 ° angle setting with upper bottom surface; LED lamp 70 emission wavelengths are 380～980nm.
In the above-described embodiments, electric charge induction device 80 is fixedly connected with opto-electronic conversion chip cmos circuit plate 60, and is arranged on Dove prism 10 1 ends.This electric charge induction device 80 is for detection of the electric charge on the human body (finger), with judge whether be copy or the non-living body fingerprint.
In the above-described embodiments, opto-electronic conversion chip cmos circuit plate 60 comprises for the opto-electronic conversion chip CMOS that gathers, analyzes, judges fingerprint and goes up the electric charge induction chip of electric charge for detection of human body (finger).
With reference to Fig. 2 and Fig. 3, Fig. 2 is the one-piece construction schematic diagram of the utility model human body electric charge induction fingerprint acquisition device; Fig. 3 is the side structure schematic diagram of the utility model human body electric charge induction fingerprint acquisition device.
In the above-described embodiments, the wide of human body electric charge induction fingerprint acquisition device is 15～17mm, and high H is 40～55mm, and thick is 15～25mm.The wide X of its fingerprint surface of contact is 15～20mm, and long Y is 15～22mm, and fingerprint head front end buckle V is 15～20mm.The pitch angle D of the fingerprint surface of contact of the Dove prism 10 of finger contact is 30～60 °, and human body electric charge induction fingerprint acquisition device bottom angled angle C is 30～50 °.The shell body of human body electric charge induction fingerprint acquisition device preferably adopts black ABS to make.
The utility model has adopted the distortion of field lens correcting image, reduced the distortion of fingerprint image, thus increased the face of collection the effective coverage, increased the accuracy of identification.The catoptric system that optical system of the present utility model adopts is provided with reflecting mechanism between field lens and camera lens, reduced the volume of optical facilities, makes structure more short, and volume is smaller and more exquisite, is convenient to the application in later stage.The focusing mode of optical system of the present utility model is to regulate the height of lens set and CMOS light-sensitive surface by lens base thread device, thereby realizes precisely focusing, has guaranteed sharpness and the high resolving power of image, has improved identification precision and speed.What illuminator of the present utility model adopted is plug-in unit or paster LED lamp, and illuminating effect is even, and utilization factor is high, and is simple in structure, and erection welding is convenient.Be fit to large-scale mass production.The human body electric charge induction technology that the utility model adopts, when false fingerprint, non-living body fingerprint contact collection face, electronic circuit can't detect the normal electric charge of human body, provides the alarm signal of non-normal use or does not identify comparison.Thereby that has realized preventing forging fingerprint uses and identifies comparison, has played the function of the fingerprint of distinguishing the true from the false.
The above only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (10)
1. human body electric charge induction fingerprint acquisition device, it is characterized in that, comprise Dove prism and imaging lens group for contact finger, and be arranged between described Dove prism and the imaging lens group, be used for the light of described Dove prism outgoing is reflexed to the coated reflective mirror of described imaging lens group;
Be provided with square field lens in the light path between described Dove prism and the described coated reflective mirror;
Described imaging lens group is fixed on the opto-electronic conversion chip cmos circuit plate by the fixing focusing of camera lens base;
Also be provided with the electric charge induction device for detection of people's volume charge on the described opto-electronic conversion chip cmos circuit plate;
Also be provided be used to the LED lamp that light source is provided on the described opto-electronic conversion chip cmos circuit plate.
2. human body electric charge induction fingerprint acquisition device as claimed in claim 1 is characterized in that, the first base angle of described Dove prism is 65～70 °, and the second base angle is 50～60 °; The right face in described the first base angle scribbles pitch-dark; The upper bottom surface of described Dove prism is frosted, and being width is the rectangle setting of 3～5mm; The face length of going to the bottom of described Dove prism is 17～21mm, and wide is 15～20mm.
3. human body electric charge induction fingerprint acquisition device as claimed in claim 2 is characterized in that, the positive light coke setting that described square field lens two apparent surfaces are sphere, and the radius-of-curvature of this sphere is 25～35mm; Distance between two sphere summits is 2～10mm: described square field lens frame length is 15～20mm, and wide is 10～15mm.
4. human body electric charge induction fingerprint acquisition device as claimed in claim 3 is characterized in that, described coated reflective mirror is the square setting that the length of side is 7～15mm, and the angle between this coated reflective mirror and the opto-electronic conversion chip cmos circuit plate is 40～50 °.
5. human body electric charge induction fingerprint acquisition device as claimed in claim 4 is characterized in that, described imaging lens group comprises at least one optical mirror slip and eyeglass spacer ring, and the diameter of this optical mirror slip is 3～10mm, and the gross thickness of all optical mirror slips is 3～10mm.
6. human body electric charge induction fingerprint acquisition device as claimed in claim 5, it is characterized in that, the fixing focusing of described camera lens base comprises at least two for the reference column that is fixedly connected with described opto-electronic conversion chip cmos circuit plate, and described camera lens fixing focusing base and imaging lens group are threaded connection and regulate first to the position; The fixing focusing of described camera lens base is the setting that the length of side is 5～13mm, and the angle between itself and the described opto-electronic conversion chip cmos circuit plate is 0～8 °.
7. human body electric charge induction fingerprint acquisition device as claimed in claim 6 is characterized in that, described LED lamp is plug-in unit or paster LED lamp, and its light-emitting area is pointed to the upper bottom surface of described Dove prism, and is 0～20 ° angle setting with described upper bottom surface; Described LED lamp emission wavelength is 380～980nm.
8. human body electric charge induction fingerprint acquisition device as claimed in claim 7 is characterized in that, described electric charge induction device is fixedly connected with opto-electronic conversion chip cmos circuit plate, and is arranged on described Dove prism one end.
9. human body electric charge induction fingerprint acquisition device as claimed in claim 8 is characterized in that, described opto-electronic conversion chip cmos circuit plate comprises opto-electronic conversion chip CMOS, electric charge induction chip.
10. such as the described human body electric charge induction of any one in the claim 1 to 9 fingerprint acquisition device, it is characterized in that, the wide of described human body electric charge induction fingerprint acquisition device is 15～17mm, and height is 40～55mm, and thick is 15～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220327616 CN202748803U (en) | 2012-07-06 | 2012-07-06 | Human-body charge induced fingerprint acquiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220327616 CN202748803U (en) | 2012-07-06 | 2012-07-06 | Human-body charge induced fingerprint acquiring device |
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| Publication Number | Publication Date |
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| CN202748803U true CN202748803U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220327616 Expired - Fee Related CN202748803U (en) | 2012-07-06 | 2012-07-06 | Human-body charge induced fingerprint acquiring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984923A (en) * | 2014-05-08 | 2014-08-13 | 长春鸿达光电子与生物统计识别技术有限公司 | Thin type aspheric surface fingerprint collecting prism and collecting device |
| CN104361334A (en) * | 2014-10-17 | 2015-02-18 | 成都科创佳思科技有限公司 | Fingerprint collection device |
| CN107644202A (en) * | 2017-09-08 | 2018-01-30 | 维沃移动通信有限公司 | A kind of optical finger print module and mobile terminal |
| CN112307849A (en) * | 2019-08-01 | 2021-02-02 | 熵基科技(广东)有限公司 | Fingerprint identification device |
-
2012
- 2012-07-06 CN CN 201220327616 patent/CN202748803U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984923A (en) * | 2014-05-08 | 2014-08-13 | 长春鸿达光电子与生物统计识别技术有限公司 | Thin type aspheric surface fingerprint collecting prism and collecting device |
| CN104361334A (en) * | 2014-10-17 | 2015-02-18 | 成都科创佳思科技有限公司 | Fingerprint collection device |
| CN107644202A (en) * | 2017-09-08 | 2018-01-30 | 维沃移动通信有限公司 | A kind of optical finger print module and mobile terminal |
| CN112307849A (en) * | 2019-08-01 | 2021-02-02 | 熵基科技(广东)有限公司 | Fingerprint identification device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20160706 |
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| CF01 | Termination of patent right due to non-payment of annual fee |