CN102436579A - High-definition infrared fingerprint acquisition device - Google Patents
High-definition infrared fingerprint acquisition device Download PDFInfo
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- CN102436579A CN102436579A CN2011100795448A CN201110079544A CN102436579A CN 102436579 A CN102436579 A CN 102436579A CN 2011100795448 A CN2011100795448 A CN 2011100795448A CN 201110079544 A CN201110079544 A CN 201110079544A CN 102436579 A CN102436579 A CN 102436579A
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Abstract
The invention relates to a high-definition infrared fingerprint acquisition device, and aims at solving the problems that the existing acquisition device is apt to be interfered by conditions and the definition cannot satisfy requirements. The high-definition infrared fingerprint acquisition device consists of a non-isosceles trapezoidal prism, a light source, lenses, a photoelectric detector and a plastic molded pipe support which is used for shielding ambient light and supporting the parts and has a rectangular cross section. The trapezoidal prism with an inclined acquisition surface is obliquely assembled on the plastic molded pipe support. A fingerprint acquisition light path sequentially consists of the trapezoidal prism, a Huygens lens set and the photoelectric detector. A fingerprint acquisition surface is arranged on the lower base surface of the trapezoidal prism, an oblique leg surface adjacent to the larger base angle of the trapezoidal prism is an optical transmission surface and the light source is configured on the upper base surface of the trapezoidal prism. The light source is an infrared light source. An oblique leg surface adjacent to the smaller base angle of the trapezoidal lens is used as an optical black substrate which is coated with black paint. An infrared light filter is additionally assembled between the lenses and the photoelectric detector or between the lenses. The upper base surface of the trapezoidal prism is a rough surface. The high-definition infrared fingerprint acquisition device has the advantages of high acquired image definition, evenness, small deformation rate, low distortion rate, high imaging quality, strong image contrast, bright lines, resistance to external ambient light interference, high dry and wet fingerprint acquisition sensitivity, simple structure and convenience in manufacturing, installation and use.
Description
Technical field
Patent of the present invention relates to a kind of fingerprint image acquisition device.Particularly relate to a kind of high-resolution infrared fingerprint collector.
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 rectangular mold pipe support that supports above-mentioned parts; Rectangle pipe support upper end is the truss of equipped prism, light source; Rectangle pipe support stage casing is the lens tube of interior dress lens, and rectangle pipe support lower end is the detector seat of equipped Photoelectric Detection.The long limit face of triangular prism is the fingerprint collecting face for scribbling silica gel fingerprint reinforcing membrane, and the next door of rectangle pipe support mounted lens seat has two holes, and a hole is a focal length of lens adjustment hole, and another is equipped lens base fixing screw hole.Through inventor's discovery that studies for a long period of time, this fingerprint image acquisition device exists the fingerprint reinforcing membrane to be easy to damage, and high light disturbs, and does deficiencies such as finger weak effect.Along with the development in fingerprint market, universal demand with the collector of silica gel reinforcing membrane, is not disturbed by high light simultaneously, and it is all excellent to do wet finger, and in addition, existing fingerprint capturer ubiquity sharpness is low, the problem that can not satisfy the demand.
For this reason; The inventor has designed and applied for that a kind of patent No. is 200820110272.7, and name is called the utility model patent of high definition Dove prism fingerprint capturer: it is made up of prism, light source, lens, photoelectric detector and shield ring environmental light and the rectangular mold pipe support that supports above-mentioned parts; Rectangular mold pipe support upper end is the frame groove of equipped prism and light source, and rectangular mold pipe support stage casing is the tube chamber of interior dress lens, and rectangular mold pipe support lower end is the testing circuit panel seat of equipped photoelectric detector; Said prism is isosceles trapezoid prism not; Said lens are Huygens's lens combination, and the bottom surface of Dove prism is the fingerprint collecting face, and the oblique girdle plane that little base angle is close to is to scribble the black substrate surface of pitch-dark optics; The oblique girdle plane that big base angle is close to is the optical transmission face; This optical transmission face outside configuration Huygens lens combination, this lens combination outside configuration photoelectric detector, photoelectric detector and testing circuit plate thereof are outward-dipping on one side; And become the angle of 4～8 degree with the plane of lens, Dove prism upper bottom surface configuration light source.This patented product finds that through using weak point is still arranged, as influenced by fingerprint self quality or other adverse condition, and sharpness can not meet the demands.
Summary of the invention
The purpose of patent of the present invention is to overcome the above-mentioned defective of prior art, and a kind of high-resolution infrared fingerprint collector is provided.
Be to realize above-mentioned purpose, high definition infrared fingerprint collector of the present invention is that the mold pipe support of rectangle is formed by not isosceles trapezoid prism, light source, Huygens's lens combination, photoelectric detector and shield ring environmental light and the xsect that supports above-mentioned parts; The equipped Dove prism of gathering face tilt of angle on the mold pipe support, the fingerprint collecting light path is followed successively by Dove prism, Huygens's lens combination, photoelectric detector; The Dove prism bottom surface is that the oblique girdle plane that is close at fingerprint collecting face, a bigger base angle is optical transmission face, upper bottom surface configuration light source; Its special feature is that said light source is an infrared light supply; The oblique girdle plane that the less base angle of Dove prism is close to scribbles pitch-dark as the black substrate of optics; Also be fitted with infrared fileter between said lens and the photoelectric detector or between the lens, the Dove prism upper bottom surface is a hair side.So design, its illuminating fingerprint is used infrared light, and filters veiling glare through infrared fileter; The fingerprint image that monochromatic infrared light forms is clear, resolution is high.Infrared light has the function of the outer skin of penetrating, and transmissive truly reflects the concavo-convex bending status of fingerprint to the corium of fingerprint, and monochromatic infrared light does not receive the interference of other light yet, with true and reliable the reflecting of fingerprint image; Help improving image definition; The brightness of image striped is improved.Adopting the Dove prism upper bottom surface is the frosted hair side, and the uniform direct projection of IR is the fingerprint face to the bottom surface of prism, has improved sharpness.Compare with existing triangular prism fingerprint capturer, image effect is good.When proofreading and correct finger print image with computing machine, distortion is very little, strengthens fingerprint resolution.Clear demonstration fingerprint pore in the image, distinguishable 0.05mm～0.08mm.Said Huygens's lens combination is the eyepiece that Huygens eyepiece (H formula or HW formula eyepiece) is made up of two single face convex lens that are separated from each other; Convex surface is all towards object lens one end; The wherein bigger focal length of lens is approximately 3 times of the less focal length of lens, and the distance of two lens is the half the of focal length sum.Two lens use the glass of the trade mark of the same race to process.The eyepiece of this two groups is to be invented by Dutch physicist Huygens the 17th century, so the called after Huygens eyepiece.Huygens eyepiece can be eliminated coma, ratio chromatism, effectively, and astigmatism is also very little.The isosceles trapezoid prism imaging is not effective, and sharpness is high.
As optimization, the upper bottom surface of said Dove prism is the frosted hair side; Said light source is the infrared light source plate of the weak green glow pilot lamp of intermediate configurations.So design, weak green glow disturbs few to images acquired, and pilot lamp is indicated as the fingerprint collecting face.
As optimization, equipped photoelectric detector and the testing circuit plate of placing vertically thereof of the downside mouth of said rectangular mold pipe support; The big lens of prism transmission face below configuration level;
Said rectangle pipe support stage casing for the tube chamber of adorning big lens, lenslet and infrared fileter from top to bottom in successively or for from top to bottom according to the big lens of interior dress, infrared fileter and lenslet, rectangular mold pipe support lower end is for being equipped with the testing circuit panel seat of photoelectric detector; Photoelectric detector and testing circuit plate thereof and Dove prism are downward-sloping adaptably, and the tube chamber of the rectangle pipe support of interior dress Huygens lens is the optical black of strict seal;
Perhaps said mold pipe support bottom be shaped on its on the symmetrical lower inclined plane of angle; The tilting reflective mirror that equipped and big lens match on the lower inclined plane; The reflective mirror side direction disposes upright lenslet, infrared fileter and photoelectric detector and testing circuit plate or reflective mirror side direction thereof successively and disposes upright infrared fileter, lenslet and photoelectric detector and testing circuit plate thereof successively, and photoelectric detector and testing circuit plate thereof and Dove prism inclination collection face are outward-dipping adaptably; The light path of arrogant lens to lenslet is the optical black of strict seal;
Said weak green glow pilot lamp is weak green light LED lamp, and said infrared light source plate is the infrared LED light source board.
Near-infrared LED is adopted in so design, makes the fingerprint imaging contrast excellent, clear picture.Make the fingerprint striped be white, and light is even up and down, makes striped complete clear through reflecting to form the black substrate of fingerprint image for pitch-dark of prism, contrast is good.The prismatic light transmission plane is just in time aimed at the lumen pore of lens combination, and the light of rays pass through lens is penetrated the lens combination that face is injected rectangular mold, and the lens combination strict seal forms an optical black.The lens planar side is equipped with the optical filter that can filter infrared veiling glare can improve the monochromatic source transmitance.The design of rectangular mold pipe-support type has guaranteed that lens move forward and backward in lens cavity.
As optimization, said photoelectric detector is higher to infrared sensitivity, and the testing circuit sleeve-board has plastic protective sleeve, makes the collector outside surface not expose any fixture wire.And circuit board is sealed by the outer enclosure, and collector forms a mold pipe fitting closely, is convenient to install in any occasion.The fingerprint collecting face is nearly 60 degree with the angle of big lens center optical axis, and photoelectric detector and testing circuit plate thereof and lenslet plane are the 3-8 slanted angle of being outside one's consideration; The angle that is fingerprint collecting face and big lens center optical axis is nearly 60 degree; Photoelectric detector sensitive surface and lenslet are towards the technical scheme of the long limit inclination of mold 4～8 degree; Infrared light tilts to transmit through infrared fileter, has corrected the image of collector, clear picture, even when focal length is adjusted; Variability, distortion rate are low, and integral image is clear evenly during the adjustment focal length of lens.
As optimization, the little base angle of Dove prism is 58 °, and big base angle is 62 °.So design, the handle angle of Dove prism is close to the blacking lacquer painting for 58 °, and big base angle is close to the optical prism that transparent surface forms for 62 °, and the substrate of fingerprint image is reflected as black matrix, and the fingerprint striped is a light, makes image contrast strengthen clean mark.
As optimization, it is 2～5% that said convex lens group makes the horizontal compression amount of fingerprint displayed image, and vertically decrement is 30%～40%.So design makes the compression of images amount laterally very little by only 5%, and is vertical about 30%, reduced degree of distortion, and to restore distortion little for computer software, even the fingerprint image that reaches the collector formed thereby can directly contrast.Lens combination is formed Huygens's lens combination by two small one and large one single face convex lens, is convenient to the adjustment of enlargement factor and focal length, has also formed the optical black chamber, and the superior black substrate of image is provided, and reduces the distortion rate of image.
As optimization, big lens are installed through big lens pressing plate in said rectangular mold pipe support middle part, and lenslet and optical filter scioptics base are installed in the rectangular mold pipe support;
Perhaps said mold pipe support middle part is equipped with big lens pressing plate between big lens and testing circuit plate, be equipped with the lens base of built-in said optical filter and lenslet greatly below the lens pressing plate and between the said mold pipe support base plate.
Lens combination fixation clip of design makes lens combination solid and reliable in the rectangular mold pipe support, and the folding dress is convenient.The prism of rectangular mold pipe support is installed screens and trapezoidal consistent size, and prism can push the upper bottom surface place of Dove prism in the groove frame.
As optimization, the said big lens left side 1.5 millimeters thickness central optical axis of excision squint left; The angle end face in one plane on prism fingerprint collecting face and the pipe support.Collector light source lead-in wire passes through in the above, is compressed by back shroud.Big convex lens are near the transparent surface of Dove prism; And big convex lens near 1.5 millimeters high of the circular arc excisions at 60 ° of base angles of prism, the lens combination central optical axis is squinted, the fingerprint image enlarged areas of collection left; Image is reflected to the photoelectric detector middle part, and effective fingerprint collecting face is increased.Prism is pushed in the pipe support by the groove frame of export-oriented rectangular mold, and the fingerprint face of prism and pipe support surface have in one plane increased the utilization factor of fingerprint collecting area, have also improved image quality.Simultaneously, collector all has consistance lens groove frame preferably, has improved the consistance of collector, has improved the quality of image and the exchange performance of collector.And make things convenient for the folding of lens to adorn.
As optimization, said infrared light supply is the outer led light source of the color red of 850nm or 940nm, and said optical filter is the narrow band pass filter of centre wavelength 850nm or 940nm.Illuminating fingerprint is with near infrared 850nm or 940nm monochromatic source LED, and infrared fileter filters veiling glare through the lens combination lower end.Infrared fileter can only pass through 850nm or 940nm infrared light, and other veiling glares such as visible light can not get into.Make fingerprint capturer not receive interference such as visible light, high light.The fingerprint collecting face of fingerprint capturer tends to residual fingerprint; The existence of residual fingerprint is a big shortcoming of optical technology; But adopt 850nm or 940nm near infrared ray rayed or optical filter to filter; Visible light can't be read residual fingerprint, make the disguise of fingerprint technique improve major step, overcome the shortcoming of residual fingerprint.
As optimization, the last angle end face that said mold pipe support is installed prism scribbles long-afterglow fluorescent material or is fitted with long-afterglow fluorescent spare or cold light film.Said cold light film also can be described as (being processed by electricity to luminescent material) EL lamp, EL light tiles or EL cold light film.So design has extraordinary collection face and shows exterior feature, and indicative function is very beneficial under weak ambient light conditions, using, and gets rid of the interference of environment veiling glare to images acquired as much as possible, guarantees to gather and the identification quality.
After adopting technique scheme; Patent high-resolution infrared fingerprint collector of the present invention compare with existing fingerprint capturer have be not with silica gel fingerprint film, clear picture, evenly, deformation rate is little, distortion rate is low, image quality is high, image contrast is strong, striped is bright, do not receive that external environment light disturbs, does that wet finger collection is sensitive, fingerprint collecting face utilization factor is high, prism folding dress conveniently; Not fragile prism and pipe support when cutting dismounting; Simple in structure, conveniently make and install the just advantage of usefulness.
Patent of the present invention has been developed two kinds of model fingerprint capturers altogether: first kind of volume is long 57.7mm, wide 21.7mm, thick 23.9mm; The small-sized collector of another kind of title: volume is long 47mm, wide 21.7mm, thick 26.5mm.Because two single face convex lens are middle by having adorned a reflecting optics in Huygens eyepiece, make light produce the bending reflection, compressed the length of fingerprint capturer, be applicable to the small size occasion.
Description of drawings
Fig. 1 is the cross-sectional side structural representation of first kind of embodiment of patent high-resolution infrared fingerprint collector of the present invention;
Fig. 2 is the dismantle backsight structural representation of back shroud of first kind of embodiment of patent high-resolution infrared fingerprint collector of the present invention;
Fig. 3 be first kind of embodiment of patent high-resolution infrared fingerprint collector of the present invention optical schematic diagram;
Fig. 4 is the plan structure synoptic diagram of the big lens of first kind of embodiment of patent high-resolution infrared fingerprint collector of the present invention;
Fig. 5 is the cross-sectional side structural representation of second kind of embodiment of the small-sized high-resolution infrared fingerprint of patent of the present invention collector;
Fig. 6 is the side-looking structural representation of second kind of embodiment of the small-sized high-resolution infrared fingerprint of patent of the present invention collector;
Fig. 7 is the backsight structural representation of second kind of embodiment of the small-sized high-resolution infrared fingerprint of patent of the present invention collector.
Embodiment
Do explanation further below in conjunction with accompanying drawing and instantiation:
Embodiment one; Shown in Fig. 1-4; High-resolution infrared fingerprint collector of the present invention is that 58 °, big base angle are 62 ° not isosceles trapezoid prism 1 by little base angle; The monochromatic near-infrared LED light source board 8 of the wavelength 850nm of the weak green light LED pilot lamp of intermediate configurations or 940nm; Huygens's lens combination 31,32, centre wavelength are the arrowband infrared fileter 16 of 850nm or 940nm, and the higher photoelectric detector of infrared sensitivity 4 and shield ring environmental light and the rectangular mold pipe support 51 that supports above-mentioned parts are formed; The equipped Dove prism 1 of gathering face tilt of angle on the mold pipe support 51, the angle end face is in one plane on the fingerprint collecting face of prism 1 and the pipe support 51; The fingerprint collecting light path is followed successively by Dove prism 1, lens combination 31,32, infrared fileter 16, photoelectric detector 4; Dove prism 1 bottom surface is the upper bottom surface configuration light source board 8 that oblique girdle plane is optical transmission face 13, frosted hair side 5 that is close at fingerprint collecting face 11, a bigger base angle; The infrared light source plate 8 on prism right side abuts against upper base frosted hair side 5; And parallel, to increase light intensity; The oblique girdle plane 12 that Dove prism 1 a less base angle is close to scribbles pitch-dark as the black substrate of optics.It is 2～5% that said convex lens group 31,32 makes the horizontal compression amount of fingerprint displayed image, and vertically decrement is 30%～40% (perhaps 30%).
The end opening of said rectangular mold pipe support 51 is equipped with the photoelectric detector 4 of traverse and is with the testing circuit plate 41 of plastic protective sleeve (film) 6; The big lens 31 of prism 1 transmission plane below configuration level, said rectangle pipe support 51 stage casings are for adorn the tube chamber of big lens 31, lenslet 32 and infrared fileter 16 in successively from top to bottom, and rectangular mold pipe support 51 lower ends are the testing circuit plate 41 of equipped photoelectric detector 4; Photoelectric detector 4 and testing circuit plate thereof 41 is downward-sloping adaptably with Dove prism 1, makes photoelectric detector 4 and testing circuit plate 41 thereof and lenslet plane be the 3-8 slanted angle of being outside one's consideration; The tube chamber of the rectangle pipe support 51 of interior dress Huygens lens is the optical black of strict seal; The fingerprint collecting face is 45 degree or nearly 60 degree with the angle of big lens 31 central optical axis 3.
As useful improvement: the last angle end face that said mold pipe support is installed prism can further scribble long-afterglow fluorescent material or be fitted with long-afterglow fluorescent spare or a little less than the green glow cold light film.
And the connection lead of photoelectric detector all is sealed in the mold cavity, and the fingerprint capturer outward appearance has no lead-in wire.Outside the photo detector circuit plate, increasing by a sealing shroud in addition is plastic protective sleeve (film) 6, and with the holding circuit original paper, circuit component is can not see on the collector surface, and the application of being convenient to collector is installed.
The embodiment of the invention two is small-sized high-resolution infrared fingerprint collector in addition; With the foregoing description one collector basically identical; Only increased a reflex reflector lens 18, be installed in the middle of small one and large one lens combination 31,32 of Huygens, made infrared fingerprint image light waves 3 produce the bending reflection; Compressed the length of collector, narrowed down to 47mm by 58mm.All the other structures all do not change.
Embodiment two; Shown in Fig. 5-7; High-resolution infrared fingerprint collector of the present invention is that 58 °, big base angle are 62 ° not isosceles trapezoid prism 1 by little base angle, the monochromatic near-infrared LED light source board 8 of the wavelength 850nm of the weak green light LED pilot lamp of intermediate configurations or 940nm, Huygens's lens combination 31,32; Centre wavelength is the arrowband infrared fileter 16 of 850nm or 940nm, and the higher photoelectric detector of infrared sensitivity 4 and shield ring environmental light and the rectangular mold pipe support 51 that supports above-mentioned parts are formed; The equipped Dove prism 1 of gathering face tilt of angle on the mold pipe support 51, the angle end face is in one plane on the fingerprint collecting face of prism 1 and the pipe support 51; The fingerprint collecting light path is followed successively by Dove prism 1, lens combination 3132, infrared fileter 16, photoelectric detector 4; Dove prism 1 bottom surface is the upper bottom surface configuration light source board 8 that oblique girdle plane is optical transmission face 13, frosted hair side 5 that is close at fingerprint collecting face, a bigger base angle; The infrared light source plate 8 on prism right side abuts against upper base frosted hair side 5; And parallel, to increase light intensity; The oblique girdle plane 12 that Dove prism 1 a less base angle is close to scribbles pitch-dark as the black substrate of optics.It is 2～5% that said convex lens group 31,32 makes the horizontal compression amount of fingerprint displayed image, and vertically decrement is 30%～40% (perhaps 30%).
Equipped photoelectric detector of placing vertically 4 of the downside mouth of said rectangular mold pipe support 51 and the testing circuit plate 41 that is with plastic protective sleeve (film) 6 thereof; The big lens 31 of prism 1 transmission plane below configuration level; Said mold pipe support 51 bottoms be shaped on its on the symmetrical lower inclined plane 15 of angle; The tilting reflective mirror 9 that equipped and big lens 31 match on the lower inclined plane 15; Reflective mirror 9 side direction dispose upright lenslet 32, infrared fileter 16 and photoelectric detector 4 and testing circuit plate 41 (but also the reflective mirror side direction disposes upright infrared fileter, lenslet and photoelectric detector and testing circuit plate thereof successively) thereof successively; Photoelectric detector 4 and testing circuit plate thereof 41 is outward-dipping adaptably with Dove prism inclination collection face, makes photoelectric detector 4 and testing circuit plate 41 thereof and lenslet plane be the 3-8 slanted angle of being outside one's consideration; The light path of arrogant lens 31 to lenslet 32 is the optical black of strict seal.The fingerprint collecting face is nearly 60 degree with the angle of big lens 31 central optical axis 3.
Said mold pipe support 51 middle parts are equipped big lens pressing plate 311 between big lens 31 and testing circuit plate 4, is equipped with the lens base 321 of built-in said optical filter 16 and lenslet 32 greatly below the lens pressing plate 311 and between the said mold pipe support base plate.Said big lens 31 left sides 1.5 millimeters thickness central optical axis of excision squint left, and the diameter of big lens is 16 millimeters, and the diameter of side cut place is 14.5 millimeters.
As useful improvement: the last angle end face that said mold pipe support is installed prism can further scribble long-afterglow fluorescent material or be fitted with long-afterglow fluorescent spare or a little less than the green glow cold light film.
And the connection lead of photoelectric detector all is sealed in the mold cavity 10, and the fingerprint capturer outward appearance has no lead-in wire.Outside the photo detector circuit plate, increasing by a sealing shroud in addition is plastic protective sleeve (film) 6, and with the holding circuit original paper, circuit component is can not see on the collector surface, and the application of being convenient to collector is installed.
The embodiment of the invention two is small-sized high-resolution infrared fingerprint collector in addition; With embodiment one collector basically identical; Only increased a reflex reflector lens 18, be installed in the middle of small one and large one lens combination 31,32 of Huygens, made infrared fingerprint image light waves 3 produce the bending reflection; Compressed the length of collector, narrowed down to 47mm by 58mm.All the other structures all do not change.
Claims (10)
1. high definition infrared fingerprint collector is that the mold pipe support of rectangle is formed by not isosceles trapezoid prism, light source, lens, photoelectric detector and shield ring environmental light and the xsect that supports above-mentioned parts; The equipped Dove prism of gathering face tilt of angle on the mold pipe support, the fingerprint collecting light path is followed successively by Dove prism, Huygens's lens combination, photoelectric detector; The Dove prism bottom surface is that the oblique girdle plane that is close at fingerprint collecting face, a bigger base angle is optical transmission face, upper bottom surface configuration light source; It is characterized in that said light source is an infrared light supply, the oblique girdle plane that the less base angle of Dove prism is close to scribbles pitch-dark as the black substrate of optics, also be fitted with infrared fileter between said lens and the photoelectric detector or between the lens, and the Dove prism upper bottom surface is a hair side.
2. according to the said fingerprint capturer of claim 1, the upper bottom surface that it is characterized in that said Dove prism is the frosted hair side; Said light source is the infrared light source plate of the weak green glow pilot lamp of intermediate configurations.
3. according to the said fingerprint capturer of claim 2, it is characterized in that the equipped photoelectric detector and the testing circuit plate of placing vertically thereof of downside mouth of said rectangular mold pipe support; The big lens of prism transmission face below configuration level;
Said rectangle pipe support stage casing for the tube chamber of adorning big lens, lenslet and infrared fileter from top to bottom in successively or for from top to bottom according to the tube chamber of the big lens of interior dress, infrared fileter and lenslet, rectangular mold pipe support lower end is the testing circuit panel seat of equipped photoelectric detector; Photoelectric detector and testing circuit plate thereof and Dove prism are downward-sloping adaptably, and the tube chamber of the rectangle pipe support of interior dress Huygens lens is the optical black of strict seal;
Perhaps said mold pipe support bottom be shaped on its on the symmetrical lower inclined plane of angle; The tilting reflective mirror that equipped and big lens match on the lower inclined plane; The reflective mirror side direction disposes upright lenslet, infrared fileter and photoelectric detector and testing circuit plate or reflective mirror side direction thereof successively and disposes upright infrared fileter, lenslet and photoelectric detector and testing circuit plate thereof successively, and photoelectric detector and testing circuit plate thereof and Dove prism inclination collection face are outward-dipping adaptably; The light path of arrogant lens to lenslet is the optical black of strict seal;
Said weak green glow pilot lamp is weak green light LED lamp, and said infrared light source plate is the infrared LED light source board.
4. according to the said fingerprint capturer of claim 3, it is characterized in that said photoelectric detector is higher to infrared sensitivity, the testing circuit sleeve-board has plastic protective sleeve; The fingerprint collecting face is 45 degree or nearly 60 degree with the angle of big lens center optical axis, and photoelectric detector and testing circuit plate thereof and lenslet plane are the 3-8 slanted angle of being outside one's consideration.
5. according to the said fingerprint capturer of claim 4, the little base angle that it is characterized in that Dove prism is 58 °, and big base angle is 62 °.
6. according to the said fingerprint capturer of claim 5, it is characterized in that it is 2～5% that said convex lens group makes the horizontal compression amount of fingerprint displayed image, vertically decrement is 30%～40%.
7. according to the said fingerprint capturer of claim 3, it is characterized in that
Big lens are installed through big lens pressing plate in said rectangular mold pipe support middle part, and lenslet and optical filter scioptics base are installed in the rectangular mold pipe support;
Perhaps said mold pipe support middle part is equipped with big lens pressing plate between big lens and testing circuit plate, be equipped with the lens base of built-in said optical filter and lenslet greatly below the lens pressing plate and between the said mold pipe support base plate.
8. according to the said fingerprint capturer of claim 3, it is characterized in that the said big lens left side 1.5 millimeters thickness central optical axis of excision squint left; The angle end face in one plane on prism fingerprint collecting face and the pipe support.
9. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 said fingerprint capturers; It is characterized in that said infrared light supply is the outer led light source of color red of 850nm or 940nm, said optical filter is the narrow band pass filter of centre wavelength 850nm or 940nm.
10. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 said fingerprint capturers, it is characterized in that the last angle end face of said mold pipe support installation prism scribbles long-afterglow fluorescent material or is fitted with long-afterglow fluorescent spare or weak green glow cold light film.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079544.8A CN102436579B (en) | 2011-03-31 | 2011-03-31 | High-definition infrared fingerprint acquisition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079544.8A CN102436579B (en) | 2011-03-31 | 2011-03-31 | High-definition infrared fingerprint acquisition device |
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| CN102436579A true CN102436579A (en) | 2012-05-02 |
| CN102436579B CN102436579B (en) | 2014-09-24 |
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| CN201110079544.8A Active CN102436579B (en) | 2011-03-31 | 2011-03-31 | High-definition infrared fingerprint acquisition device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170665A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Optical fingerprint prism |
| WO2013170669A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Optical tube |
| WO2013170666A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Structure of a fingerprint collecting device |
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| CN110263727A (en) * | 2019-06-24 | 2019-09-20 | Oppo广东移动通信有限公司 | Display device, electronic equipment and image acquiring method |
| CN111357010A (en) * | 2019-06-28 | 2020-06-30 | 深圳市汇顶科技股份有限公司 | A enhancement film for optical fingerprint sensor under screen |
| CN111673709A (en) * | 2020-06-30 | 2020-09-18 | 天津大学 | Fingerprint identification robot device based on up-conversion long afterglow material and control method |
| CN112307849A (en) * | 2019-08-01 | 2021-02-02 | 熵基科技(广东)有限公司 | Fingerprint identification device |
| CN113960744A (en) * | 2021-11-05 | 2022-01-21 | 中国工程物理研究院机械制造工艺研究所 | Clamp for clamping wedge-shaped mirror, wedge-shaped mirror and optical device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170665A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Optical fingerprint prism |
| WO2013170669A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Optical tube |
| WO2013170666A1 (en) * | 2012-05-17 | 2013-11-21 | Min Yu | Structure of a fingerprint collecting device |
| CN105184237A (en) * | 2015-08-26 | 2015-12-23 | 苏州市博得立电源科技有限公司 | Identity-identification-based luggage case power supply controlling apparatus |
| CN107679486A (en) * | 2017-09-28 | 2018-02-09 | 维沃移动通信有限公司 | A kind of terminal and fingerprint collecting method |
| CN110263727A (en) * | 2019-06-24 | 2019-09-20 | Oppo广东移动通信有限公司 | Display device, electronic equipment and image acquiring method |
| CN111357010A (en) * | 2019-06-28 | 2020-06-30 | 深圳市汇顶科技股份有限公司 | A enhancement film for optical fingerprint sensor under screen |
| CN111357010B (en) * | 2019-06-28 | 2023-09-22 | 深圳市汇顶科技股份有限公司 | Enhancement film for an off-screen optical fingerprint sensor |
| CN112307849A (en) * | 2019-08-01 | 2021-02-02 | 熵基科技(广东)有限公司 | Fingerprint identification device |
| CN111673709A (en) * | 2020-06-30 | 2020-09-18 | 天津大学 | Fingerprint identification robot device based on up-conversion long afterglow material and control method |
| CN111673709B (en) * | 2020-06-30 | 2022-07-08 | 天津大学 | Fingerprint identification robot device based on up-conversion long afterglow material and control method |
| CN113960744A (en) * | 2021-11-05 | 2022-01-21 | 中国工程物理研究院机械制造工艺研究所 | Clamp for clamping wedge-shaped mirror, wedge-shaped mirror and optical device |
| CN113960744B (en) * | 2021-11-05 | 2023-09-12 | 中国工程物理研究院机械制造工艺研究所 | Clamp for clamping wedge-shaped mirror, wedge-shaped mirror and optical device |
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