CN201477615U - Fingerprint acquisition instrument with two lenses - Google Patents
Fingerprint acquisition instrument with two lenses Download PDFInfo
- Publication number
- CN201477615U CN201477615U CN2009203050613U CN200920305061U CN201477615U CN 201477615 U CN201477615 U CN 201477615U CN 2009203050613 U CN2009203050613 U CN 2009203050613U CN 200920305061 U CN200920305061 U CN 200920305061U CN 201477615 U CN201477615 U CN 201477615U
- Authority
- CN
- China
- Prior art keywords
- prism
- acquisition instrument
- fixed support
- lens
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Image Input (AREA)
Abstract
The utility model relates to a fingerprint acquisition instrument with two parallel lenses. The purpose of the utility model is to provide a novel fingerprint acquisition instrument, which adopts the two parallel lenses in order to enhance the image-refracting effect and increase the definition of fingerprints, an image sensor is protected because the image sensor is arranged inside, and the photoelectric conversion effect of image is enhanced because the image sensor is arranged close to an objective lens unit. The fingerprint acquisition instrument comprises a shell, a light source, a refractor, a reflector and a receiver, wherein a prism is adopted as the refractor, a diffuser is attached on the incident plane of the prism, the reflecting plane of the prism serves as an acquisition plane, the two lenses are arranged corresponding to another plane of the prism, and are arranged in parallel, the image receiver comprises the objective lens unit and the image sensor, and the prism, the lenses, the reflector, the objective lens unit and the image sensor are arranged in the shell. Since the prism, the lenses, the reflector, the objective lens unit and the image sensor are arranged in the shell of the acquisition instrument, internal parts can be protected, the adoption of the two lenses can increase the definition of image refraction, the objective lens unit is fixed inside the shell and provided with a projection which is positioned on an objective lens-fixing support in the shell, consequently, the stability of optic signal transmission is enhanced, the success rate of optic signal reception is increased, and the overall structure of the acquisition instrument is compact and small.
Description
Technical field
The utility model relates to a kind of Acquisition Instrument, especially a kind of double lens fingerprint acquisition instrument that is arranged in parallel.
Background technology
For accurately characterizing a people's identity, need to gather individual feature, existing acquisition mode: fingerprint, palmmprint, face line, iris, sound, vein, signature sometimes.
Fingerprint is one of natural miracle, and therefore human had I.D. built-in, that obtain easily just, and everyone finger tip all has a unique design of only representing the himself.
The fingerprint collecting instrument system has two groundworks: the one, and the image that needs acquisition to point, the 2nd, need to determine ridge line in this image and trough whether with former images acquired in ridge line and trough match, the fingerprint image that obtains a people has several different methods, the most frequently used method is exactly optical module collection and semiconductor collection now, these two kinds of acquisition methods are worked in a completely different way, but all can obtain with a kind of image.
The core component of optical module collection is an imageing sensor, this with digital camera and video camera in the light sensor system that uses be identical.CCD (charge-coupled image sensor) is as an imageing sensor, and this device can produce electric signal under the effect of photon, pixel of each image recording sensor, i.e. and the small round dot of the light beam of this point is hit in representative.The light and shade pixel has constituted the image of collection scene (for example finger) jointly.Usually, an analog to digital converter is arranged in the Acquisition Instrument system, be used for the treatment of simulated electronic signal to produce the digital representation of this image.Acquisition Instrument is furnished with light source, is generally one group of light emitting diode, is used for illuminating the ridge line of finger.When you were placed on finger on the Collection prism, gatherer process had just begun, and the CCD camera just is filmed fingerprint.What in fact the CCD system produced is the inverted image of finger, the more reflection ray of darker Regional Representative (the ridge line of finger), the reflection ray (trough of finger) that brighter Regional Representative is less.Before comparing fingerprint and storing data, the Acquisition Instrument processor will guarantee that CCD has photographed distinct image.It can check the integral value of the mean value or a small sample of pixel darkness, if integral image is too dark or too bright, just this time collection can be abandoned.So Acquisition Instrument is adjusted acquisition time and is entered to allow light more or still less, gathers once again.If darkness is suitable, the Acquisition Instrument system can continue the sharpness (acutance of fingerprint collecting) of check image.Processor will be checked the some straight lines that move along the vertical and horizontal directions on image.If the line vertical with the ridge line is made of alternately very dark pixel and very bright pixel, so just mean that fingerprint image has good sharpness.Find under the clear picture and the correct situation of exposing that at processor it can continue the fingerprint of will catch and the fingerprint on the file compares.
As the optical module Acquisition Instrument, the semiconductor Acquisition Instrument produces ridge line and the trough image of forming fingerprint.Difference is that the semiconductor Acquisition Instrument uses electric current but not light comes the sensing fingerprint.
Summary of the invention
The purpose of this utility model provides a kind of novel fingerprint acquisition instrument, adopt be arranged in parallel double lens, improve the image refraction effect; improve the sharpness of fingerprint; sensor is built-in can protect imageing sensor, arranges near objective apparatus, improves the photoelectric conversion result of image.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of double lens fingerprint acquisition instrument, comprise housing, light source, refracting telescope, catoptron and receiving trap, wherein, described refracting telescope adopts prism, be covered with diffusing globe on the plane of incidence of prism, the reflecting surface of prism is as collection face, another face correspondence of prism is placed with lens, totally two on described lens, be arranged in parallel, described receiving trap comprises objective apparatus and imageing sensor, and prism, lens, catoptron, objective apparatus and imageing sensor all are arranged in the housing.The effect of objective apparatus is that sample is done to amplify for the first time, it is the important components of decision Acquisition Instrument readability, objective apparatus utilizes light to make the imaging for the first time of tested object, thereby direct relation and influence quality and every optical technology parameter of imaging, imageing sensor is the photoelectric converting function that utilizes photoelectric device, light image on its light-sensitive surface converted to light image become corresponding proportion to concern a kind of function element of electric image signal, be divided into CCD and CMOS (ComplementaryMetal-Oxide Semiconductor according to the element difference, metal oxide semiconductor device), CCD is the high-end technology element that is applied in the imaging aspect, CMOS then is applied in the product of low image quality, its advantage is that manufacturing cost is lower than CCD, power consumption is also much lower, although bigger difference is arranged technically, but CCD and CMOS performance gap are not very big, just the CMOS camera is higher to the requirement of light source, but this problem is resolved substantially now, the CCD size of component mostly is 1/3 inch or 1/4 inch at present, under identical resolution, should select component size bigger for well; The technical program support rolling and plane fingerprint collecting, Acquisition Instrument are by housings close, and housing can be protected imageing sensor, objective apparatus, catoptron and the lens etc. of Acquisition Instrument inside.
As preferably, housing wall is provided with the object lens fixed support, the object lens fixed support is provided with the circular hole that an outer ring with objective apparatus matches, and the outer wall of objective apparatus is provided with a circle protuberance, and objective apparatus passes the circular hole on the object lens fixed support and the protuberance location is arranged; The object lens fixed support is connected with the sensor board fixed support by attachment screw and dog screw, and the sensor board fixed support is provided with macropore, and objective apparatus passes macropore, fixation of sensor plate on the sensor board fixed support.
As preferably, imageing sensor is fixed on the sensor board, and imageing sensor is connected with data line over against the path channels of objective apparatus inside on the sensor board, and data line is connected to the outside of Acquisition Instrument.Imageing sensor to external data processor, is stored data transmission or the data of data with original storage are compared by external data processor.
As preferably, described light source adopts luminous plaque.Luminous plaque can provide Acquisition Instrument to use for a long time as the light source that continues.
The beneficial effects of the utility model are: prism, lens, catoptron, objective apparatus and imageing sensor all are arranged in the housing of Acquisition Instrument; the parts that protection is inner; adopt two lens can improve the sharpness of image refraction; objective apparatus is fixed on enclosure interior and has protuberance to be positioned on the interior object lens fixed support of housing; improved the stability of optical signal transmission; improve the success ratio that light signal receives, the compact conformation of Acquisition Instrument integral body, volume is little.
Description of drawings
Fig. 1 is a kind of structural representation of the utility model;
Among the figure: 1, prism, 2, diffusing globe, 3, luminous plaque, 4, catoptron, 5, housing, 6, objective apparatus, 7, sensor board, 8, imageing sensor, 9, lens, 10, the object lens fixed support, 11, the sensor board fixed support.
Embodiment
Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of double lens fingerprint acquisition instrument (referring to accompanying drawing 1), comprise housing 5, light source, refracting telescope, catoptron 4 and receiving trap, adopt prism 1 as refracting telescope, adopt luminous plaque as light source, be covered with diffusing globe 2 on the plane of incidence of prism, second face of prism is as collection face, the light of luminous plaque enters through three face of collection face reflection through prism from the plane of incidence of prism, the position lens 9 of the 3rd face of corresponding prism, totally two on lens, be arranged in parallel, catoptron is arranged on the light path that Acquisition Instrument passes from lens, receiving trap is arranged on the reflected light path of catoptron, receiving trap comprises objective apparatus 6 and imageing sensor 8, prism, lens, catoptron, objective apparatus and imageing sensor all are arranged in the housing, housing wall is provided with object lens fixed support 10, the object lens fixed support is provided with the circular hole that an outer ring with objective apparatus matches, the outer wall of objective apparatus is provided with a circle protuberance, objective apparatus passes the circular hole on the object lens fixed support and locatees by protuberance, the object lens fixed support is connected with sensor board fixed support 11 by attachment screw and dog screw, the sensor board fixed support is provided with macropore, objective apparatus passes macropore, fixation of sensor plate 7 on the sensor board fixed support, sensor is fixed by the web member and the sensor board fixed support at two ends, imageing sensor is fixed on the sensor board, imageing sensor is over against the path channels of objective apparatus inside, be connected with data line on the sensor board, data line is connected to the outside of Acquisition Instrument.
The double lens fingerprint acquisition instrument possesses the USB2.0 interface, can be used as the peripherals of a station symbol standard, is connected to any PC fast.
Above-described embodiment is a kind of preferred version of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (5)
1. double lens fingerprint acquisition instrument, comprise housing, light source, refracting telescope, catoptron and receiving trap, it is characterized in that described refracting telescope adopts prism, be covered with diffusing globe on the plane of incidence of prism, the reflecting surface of prism is as collection face, and another face correspondence of prism is placed with lens, totally two on described lens, be arranged in parallel, described receiving trap comprises objective apparatus and imageing sensor, and prism, lens, catoptron, objective apparatus and imageing sensor all are arranged in the housing.
2. double lens fingerprint acquisition instrument according to claim 1, it is characterized in that housing wall is provided with the object lens fixed support, the object lens fixed support is provided with the circular hole that an outer ring with objective apparatus matches, the outer wall of objective apparatus is provided with a circle protuberance, and objective apparatus passes the circular hole on the object lens fixed support and the protuberance location is arranged.
3. double lens fingerprint acquisition instrument according to claim 2, it is characterized in that the object lens fixed support is connected with the sensor board fixed support by attachment screw and dog screw, the sensor board fixed support is provided with macropore, objective apparatus passes macropore, fixation of sensor plate on the sensor board fixed support.
4. according to claim 1 or 2 or 3 described double lens fingerprint acquisition instruments, it is characterized in that imageing sensor is fixed on the sensor board, imageing sensor is connected with data line over against the path channels of objective apparatus inside on the sensor board, data line is connected to the outside of Acquisition Instrument.
5. root double lens fingerprint acquisition instrument according to claim 1 is characterized in that described light source adopts luminous plaque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203050613U CN201477615U (en) | 2009-06-25 | 2009-06-25 | Fingerprint acquisition instrument with two lenses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203050613U CN201477615U (en) | 2009-06-25 | 2009-06-25 | Fingerprint acquisition instrument with two lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477615U true CN201477615U (en) | 2010-05-19 |
Family
ID=42413870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203050613U Expired - Fee Related CN201477615U (en) | 2009-06-25 | 2009-06-25 | Fingerprint acquisition instrument with two lenses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477615U (en) |
-
2009
- 2009-06-25 CN CN2009203050613U patent/CN201477615U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105095844B (en) | Binocular iris image data acquisition module and method | |
| JP4566929B2 (en) | Imaging device | |
| US20060284987A1 (en) | PDA compatible text scanner | |
| CN201477614U (en) | Single-reflecting liquid crystal touch screen fingerprint and palm print scanner | |
| CN109740514A (en) | A kind of display screen optical finger print identification electronic device and method | |
| TW201713963A (en) | Optical apparatus | |
| CN103984190A (en) | Optical module installed on mobile terminal | |
| CN103984191A (en) | Optical module installed on mobile terminal | |
| CN201498007U (en) | Hybrid fingerprint and palm print acquisition instrument | |
| CN102043947A (en) | Small-sized fingerprint collector | |
| CN105550668A (en) | Apparatus for collecting biological features of living body and method for identifying biological features of living body | |
| CN106203407A (en) | One has environment resistant light interference triangular prism and fingerprint collecting equipment | |
| CN101604388A (en) | Bar code scanning type method for checking meter by directly reading | |
| CN201477613U (en) | Small-sized single-reflecting fingerprint scanner | |
| CN201477615U (en) | Fingerprint acquisition instrument with two lenses | |
| CN201556215U (en) | Double-reflection fingerprint acquisition instrument | |
| CN201477616U (en) | Double-lens fingerprint and palm print acquisition instrument | |
| CN105279501B (en) | A kind of Zigzag type palm print collecting device of dark background | |
| US6288779B1 (en) | Close-up imaging device using a CMOS photosensitive element | |
| CN101320421A (en) | Optical reading head | |
| CN203444497U (en) | Finger vein and fingerprint acquisition integrated apparatus | |
| CN206370877U (en) | Dual camera integral type video camera | |
| CN106650711B (en) | Miniaturized finger vein recognition device | |
| CN202748805U (en) | Flat fingerprint gatherer | |
| CN201477612U (en) | Fingerprint scanner with indicating lamps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20170625 |