CN1595223A - Large area optical rolling fingerprint gathering instrument - Google Patents
Large area optical rolling fingerprint gathering instrument Download PDFInfo
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- CN1595223A CN1595223A CN 200310115902 CN200310115902A CN1595223A CN 1595223 A CN1595223 A CN 1595223A CN 200310115902 CN200310115902 CN 200310115902 CN 200310115902 A CN200310115902 A CN 200310115902A CN 1595223 A CN1595223 A CN 1595223A
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- lens
- light
- prism
- photographic field
- field lens
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Abstract
It is an optics roll fringe collector with large area, which comprises the optics system and CMOS electric-to-optical transducer and is orderly located with a wedge lens and photograph lens along its light axis, wherein, the position and direction of the wedge lens make the light beam reflected to the direction against the light source and that of the photograph lens make the light beam reflected to the direction near to the light source. Through the main section of light axis, the section of the isosceles right triangle is isosceles right triangle and the section of the wedge lens is right triangle. And there are located with a plane reflection lens between the wedge lens and the photograph lens, which make the light reflection direction through the plane reflection lens near the light source. The fringe images formed by the optics system can be translates digital signal image through CMOS electric-to -optical transducer and realize the roll fringe collection of the moving object.
Description
Technical field:
The present invention relates to the improvement of the harvester of optical finger print, say it is to disclose a kind of large tracts of land optics rolling fingerprint acquisition instrument clearly, belong to living body finger print acquisition device technique field.
Background technology:
The standard code relevant according to the Ministry of Public Security, the collection of relevant live body rolling fingerprint requires the acquisition window size of collector must be more than or equal to 40 * 40MM.Be divided into types such as optical profile type, condenser type, pressure type for existing Acquisition Instrument type.Wherein, each element of optical profile type Acquisition Instrument, aspect manufacturing processing technic, manufacturability is relatively good, and cost of products is lower etc., and its these advantages help Acquisition Instrument to realize the large tracts of land collection.But adopt the optical fingerprint acquisition system, at first face technological difficulties, it is exactly the problem on deformation how the disposal system image produces, distortion in images can be brought difficulty to fingerprint image processing system, cause complicated, the fingerprint characteristic of system to lose adverse consequencess such as phenomenon, this is that system realizes the most critical issue place that the fingerprint large tracts of land is gathered.
Summary of the invention:
The present invention discloses a kind of large tracts of land optics rolling fingerprint acquisition instrument, has solved the problem of large tracts of land optically detecting instrument anamorphose.
The present invention adopts the lens type technical solution, utilize the total reflection principle of isosceles right-angle prism, system is designed to closed, by the way that adopts telecentric beam path the trapezoidal distortion of isosceles right-angle prism imaging is changed into the rectangle distortion, utilize prism wedge itself to have the characteristics of single compressed light again, rectangle distortion is changed into undistorted, solved the anamorphose problem, reach the intended purposes of fingerprint image acquisition identification.
Specific embodiments of the present invention is as follows: be made of light source, optical system, CMOS photoelectric commutator, it is characterized in that: a Collection prism is placed at the acquisition window place in the optical system, it is an isosceles right-angle prism that is positioned at the light source rear along optical path direction, its rear a wedge type prism and photographic field lens along optical path direction arranged in co-axial alignment successively, the putting position of wedge type prism and direction make light be folded to towards the direction of backlight, and the pendulum of photographic field lens makes light be folded near the direction of light source in position and direction; On the process principal section of optical axis, the principal section of isosceles right-angle prism is an isosceles right triangle, and the principal section of wedge type prism is a right-angle triangle; Also place a plane mirror thereon between described wedge type prism and the photographic field lens, the light of wedge type prism outgoing is reflexed on the photographic field lens, the CMOS photoelectric commutator is arranged on the image planes of photographic field lens.Fingerprint by the CMOS photoelectric commutator, can obtain digital signal image by the computer user through the image that optical system became, and realizes the collection purpose of live body rolling fingerprint.
Described photographic field lens comprises preceding group of being made up of biconvex lens a, positive meniscus lens, biconcave lens and the back group of imaging group of being made up of biconvex lens b, biconvex lens c, biconvex lens d that is constituted, each lens is arranged in order formation along optical axis, and the light path design of photographic field lens is become telecentric beam path.
The above light source, optical system, CMOS photoelectric commutator all are fixed on the same support successively.Purpose is to be processing and manufacturing that makes things convenient for product and assembling, increases the stability of layout of whole optical system, utilizes the support of mould manufacturing to carry out the fixing of each element.
Be the influence that the foozle of avoiding each part is brought to optical system, the position of described plane mirror is adjustable.
Good effect of the present invention is: adopt the lens type method, utilize the total reflection principle of prism, reduce energy loss, avoid extraneous light that system is exerted an influence and disturb, system is designed to closed, the total reflection imaging process of prism can make the image phenomenon that deforms, and produces trapezoidal distortion.By the way that adopts telecentric beam path trapezoidal distortion is changed into the rectangle distortion.The rectangle distortion does not allow to exist on image yet.Therefore, take to utilize the way of prism wedge again, rectangle distortion is changed into undistorted, successfully solved the anamorphose problem.Reach the intended purposes of fingerprint image acquisition identification at last.The luminous energy of this Acquisition Instrument strengthens and makes full use of, and reduces energy loss, avoids extraneous light that system is exerted an influence and disturbs, and one-piece construction is tending towards rationalizing, the characteristics that realistic collection is used.
Description of drawings:
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is a structural principle side view of the present invention.
Embodiment:
Shown in Fig. 1,2, the fore device of isosceles right-angle prism 2 has light source 1, the refractive power face of prism 2 is the fingerprint collecting window, prism wedge 3 is located on the same optical axis with prism 2, plane mirror 4 is located between wedge type prism 3 and the photographic field lens 5, the light of wedge type prism 3 outgoing is reflexed on the photographic field lens 5, and CMOS photoelectric commutator 6 is arranged on the image planes of photographic field lens 5.
In the above-mentioned optical system components: the length of side of isosceles right-angle prism 2 is 36MM, and material is K9; The angle of wedge of wedge type prism 3 is 31.8 degree, and material is K9; The center thickness of plane mirror 4 is 5MM, and material is K9; Projection objective 5 is made up of following optical mirror slip: the center thickness of biconvex lens 7 is 7.5MM, and material is ZK9, and curvature half is through R154.1, R-154.1, and outer round mouth is through 42MM; The center thickness of positive meniscus lens 8 is 7.2MM, and material is ZK9, and curvature half is through R31, R141, and outer round mouth is through being 39MM; The center thickness of biconcave lens 9 is 3MM, and material is F4, and curvature half is through R-80.2, R232.89, and outer round mouth is through 18MM; Be provided with light hurdle 13 on the back focus in the light path of preceding set of contact lenses.The center thickness of biconvex lens 10 is 2.5MM, and material is K9, and curvature half is through R135, R-18.3, and outer round mouth is through being 12MM; The center thickness of biconvex lens 11 is 4.6MM, and material is ZK9, and curvature half is through R168, R-18, and outer round mouth is through being 12MM; The center thickness of biconvex lens 12 is 3.5MM, and material is ZK9, and curvature half is through R11, R-231, and outer round mouth is through 12MM; CMOS photoelectric commutator 6 is positioned on the image planes of biconvex lens c.
Claims (3)
1, a kind of large tracts of land optical profile type rolling fingerprint acquisition instrument, constitute by light source, optical system, CMOS photoelectric commutator, it is characterized in that: a Collection prism is placed at the acquisition window place in the optical system, it is an isosceles right-angle prism that is positioned at the light source rear along optical path direction, its rear a wedge type prism and photographic field lens along optical path direction arranged in co-axial alignment successively, the putting position of wedge type prism and direction make light be folded to towards the direction of backlight, and the pendulum of photographic field lens makes light be folded near the direction of light source in position and direction; On the process principal section of optical axis, the principal section of isosceles right-angle prism is an isosceles right triangle, and the principal section of wedge type prism is a right-angle triangle; Also place a plane mirror thereon between described wedge type prism and the photographic field lens, the light of wedge type prism outgoing is reflexed on the photographic field lens, the CMOS photoelectric commutator is arranged on the image planes of photographic field lens.
2, Acquisition Instrument according to claim 1, it is characterized in that: photographic field lens comprises preceding group of being made up of biconvex lens a, positive meniscus lens, biconcave lens and the back group of imaging group of being made up of biconvex lens b, biconvex lens c, biconvex lens d that is constituted, each lens is arranged in order formation along optical axis, and the light path design of photographic field lens is become telecentric beam path.
3, Acquisition Instrument according to claim 1 is characterized in that: the position of plane mirror is to adjustable along optical path axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101159021A CN100559232C (en) | 2003-12-10 | 2003-12-10 | Large tracts of land optics rolling fingerprint acquisition instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101159021A CN100559232C (en) | 2003-12-10 | 2003-12-10 | Large tracts of land optics rolling fingerprint acquisition instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1595223A true CN1595223A (en) | 2005-03-16 |
| CN100559232C CN100559232C (en) | 2009-11-11 |
Family
ID=34661402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101159021A Expired - Fee Related CN100559232C (en) | 2003-12-10 | 2003-12-10 | Large tracts of land optics rolling fingerprint acquisition instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100559232C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368298A (en) * | 2011-11-12 | 2012-03-07 | 东莞市中控电子技术有限公司 | Double-finger, single finger and rolling fingerprints acquisition, registration and identification apparatus |
| CN102880867A (en) * | 2011-09-06 | 2013-01-16 | 友尼嗯可缪尼体有限公司 | Optical fingerprint collection device |
| CN108898100A (en) * | 2018-06-29 | 2018-11-27 | 长春鸿达光电子与生物统计识别技术有限公司 | A kind of large area optical rolling fingerprint collecting method and device |
-
2003
- 2003-12-10 CN CNB2003101159021A patent/CN100559232C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880867A (en) * | 2011-09-06 | 2013-01-16 | 友尼嗯可缪尼体有限公司 | Optical fingerprint collection device |
| CN102880867B (en) * | 2011-09-06 | 2015-10-28 | 友尼嗯可缪尼体有限公司 | Optical fingerprint acquisition apparatus |
| CN102368298A (en) * | 2011-11-12 | 2012-03-07 | 东莞市中控电子技术有限公司 | Double-finger, single finger and rolling fingerprints acquisition, registration and identification apparatus |
| WO2013067661A1 (en) * | 2011-11-12 | 2013-05-16 | 东莞市中控电子技术有限公司 | Double-finger, single-finger and rolling fingerprints acquisition, registration and identification device |
| CN108898100A (en) * | 2018-06-29 | 2018-11-27 | 长春鸿达光电子与生物统计识别技术有限公司 | A kind of large area optical rolling fingerprint collecting method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100559232C (en) | 2009-11-11 |
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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: 20091111 Termination date: 20161210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |