CN206576851U - Whole-field optically chromatographic imaging system and biological recognition system - Google Patents
Whole-field optically chromatographic imaging system and biological recognition system Download PDFInfo
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Abstract
This application discloses a kind of whole-field optically chromatographic imaging system and biological recognition system, using with the whole-field optically chromatograph of the big depth of field and deep penetration ability, internal fingerprint tissue extraction has a width two dimensional image at inclination angle (or curved surface) with finger epidermis, carries out coding preservation and identification.The system can also merge inside and outside finger print data, improve degree of safety and compatible with conventional fingerprint database.The problem of the utility model overcomes existing fingerprint identification device and there is safety problem due to easily being cheated by fingerprint film, and finger surface is made dirty, overly wet or abrasion also results in the poor robustness such as identification failure.
Description
Technical field
The utility model belongs to biological identification technology, more particularly to a kind of whole-field optically chromatographic imaging system and biological knowledge
Other system, biometric identity identification is carried out using the interior fingerprint of finger.
Background technology
World's exchange is more and more frequently extensive, while terrified and criminal activity also grows in intensity, thus biological identification technology
In recent years demand growth is rapid, and requirements at the higher level are proposed to fast and accurately authentication.
Due to conventional fingerprint recognition methods, easily cheat and pass through to replicate fingerprint, and finger surface make dirty, it is overly wet or
Person's abrasion is then failed, and security and robustness are under suspicion, and are driven by every country safety and law enforcement agency, and face is known
Not, the technology such as Application on Voiceprint Recognition, cheilogramma identification, iris structure and retinal vein identification is continued to develop, otherwise but these technologies can
By property exist dispute on, or using and its inconvenient, bulky, cost it is too high.
According to Holder E.H. et al. achievement in research [The fingerprint sourcebook
(U.S.Department.of Justice,Office of Justice Programs,National Institute of
Justice, Washington, DC, 2011)], in 220-550 μm of skin layer of finger interior, with surface (outside) fingerprint phase
Same topological characteristic, Robinson L.O., Laub J.H., National Institute of J.,.These interior layers, fill
When " master module " causes outside fingerprint to be grown according to its shape, therefore, subcutaneous fingerprint is not affected by environment and weares and teares, it is difficult to imitative
System, it is more accurate for identification.In addition, the sweat gland and microvessel structure of finger interior also follow shape with fingerprint.We
Fingerprint is subcutaneous fingerprint in definition, and corresponds to the institutional frameworks such as the sweat gland and capillary of aspect, and it has lifelong consistency, can
The biometric identity identification of height robust for accurate.In current fingerprint identification technology, optics, electric capacity, thermal map, pressure sensitivity etc.
Fingerprint extraction mode can not all obtain interior fingerprint.And ultrasonic method is because detector size is excessive, response speed is slow, processing system is huge
It can not also apply greatly.Houston, U.S.A university Larin KV in 2006 [IEEE Photonics Technol.Lett.19 (20),
1634-1636 (2007)] propose to obtain interior fingerprint with frequency sweep tomography, but traditional chromatography imaging technique is to two-dimentional front elevation
Point-to-point scanning is needed as extracting, and final reconstruct (z directions must be imaged first) direct picture from three-dimensional dactylotype, number
According to too high (more than 1G) is measured, extraction rate is excessively slow (more than 10 seconds).
Whole-field optically coherent tomography 1998 by, Beaurepaire E and Boccara A C et al. utility models, its
Principle is set forth in " Full-field optical coherence microscopy ", Optics Letters, 1998,23
(4):244-246.Feasibility Solution is provided for fingerprint imaging in high speed.
The no-raster of whole-field optically coherent tomographic system can disposably obtain two dimensional image, be swept relative to traditional optical chromatography point
Imaging mode is retouched, the industrial detection demand of vertical axle (face-to-face) image of a width is particularly only needed to, image taking speed and resolution ratio have
The raising of the order of magnitude.Main advantage includes：(1) speed image is extracted fast.Illumination of incoherent light full filed is taken, once obtains many
Passage two dimensional image, lateral cross talk is suppressed using the spatial domain incoherence of light source；(2) axial resolution and lateral resolution decoupling
Close.Its lateral resolution is decided by the numerical aperture of image-forming objective lens, and longitudinal frame is decided by source character, i.e. spectral width
Degree, spectrum is wider, and axial resolution is higher, takes the illumination of white light halogen tungsten lamp to basically reach less than 1 micron axial resolution.The whole audience
Optical coherence tomography is mainly used in high-resolution biologic applications field, such as to skin, brain tissue, stomach wall, mammary tumor, tissue
Incubation etc. is imaged.System has Non-contact nondestructive detectability, and biological tissue two can be disposably extracted with no-raster
Tie up image.
Whole-field optically coherent tomographic system is used for live body bodily tissue internal imaging, one of its important indicator is its horizontal stroke
To resolution ratio (δx, δy),
Here λcFor the centre wavelength (center of correspondence spectral width, or in the case of spatial distribution is uneven of light source
The wavelength of correspondence luminous power peak), NA is the numerical aperture of optical system.It is horizontal according to biometric object and characteristic
The requirement of resolution ratio can be varied from, and be generally less than 10 μm preferably for fingerprint recognition.
The characteristics of whole-field optically coherent tomographic system is different from conventional optical systems is that horizontal and vertical resolution ratio is decoupled
Close, its axial resolution is unrelated with optical system parameter, is only determined by light source characteristic, its axial resolution δzHave,
Here LcFor the coherence length of laser, n ' is the refractive index of tissue.The coherence length of light source is
Wherein λcFor the centre wavelength of light source, Δ λ is the spectral width of light source.When taking the halogen tungsten lamp to illuminate, λn=750nm,
δzLess than 0.8 μm can be reached, needs can be met completely to the application that biometric identity is recognized.
The penetration depth of whole-field optically coherent tomographic system is that another carries out bio-identification to biological tissue imaging
Important parameter, usual system value aperture is smaller, and penetration depth is bigger.Existing whole-field optically coherent tomographic system is mainly for height
What resolution ratio cell grade bio-imaging and micro-nano machinery were imaged, numerical aperture is very high, thus penetration depth is limited.
Utility model content
The purpose of this utility model is to provide a kind of interior fingerprint fast imaging and biological recognition system and method, to overcome
Deficiency of the prior art.
To achieve the above object, the utility model provides following technical scheme：
The embodiment of the present application discloses a kind of whole-field optically chromatographic imaging system, including：
Illumination arm, including time domain weak coherent light source；
Reference arm, including reference reflector, the reference reflector are rotatable and/or removable along optical axis direction；
Sample arm, using long-focal length lens or cancellation object lens, the focal length of the long-focal length lens is more than or equal to 100mm；
Feeler arm, including area array detector, the photosurface conjugation of the area array detector are flat to reference reflector reflection
Face and optical axes crosspoint；
Beam splitter, is connected with the illumination arm, reference arm, sample arm and detector respectively.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, in addition to the calculating system being connected with the feeler arm
System.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, include the digital collection of the outer fingerprint image of collection
Unit, the digital collection unit is connected to the computing system.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the sample arm includes dividing fingerprint image
The first sample arm and the second sample arm not gathered.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the time domain weak coherent light source be area source or by
The area source is coupled through light shafts, and the area source is LED, superradiance laser tube SLD or halogen tungsten lamp.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the area array detector be selected from two-dimensional CCD,
InGaAs, CMOS or photodiode array.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the reference reflector is selected from silicon metal, germanium, oxygen
Change zinc, metallic-membrane plating reflector or Yag crystalline materials.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the reference arm includes being used for Chromatically compensated window
Mouthful.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the illumination arm is also included spatial incoherent light
It is coupled to system kind positive light coke element in source.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the illumination arm includes afocal system, afocal system
Including the first lens and the second lens, the second lens are located between the time domain weak coherent light source and the first lens, the remote burnt system
System constitutes kohler's illumination mode with time domain weak coherent light source, and the time domain weak coherent light source is projected onto preceding Jiao of the first lens
Face.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the feeler arm includes remote burnt image relay group, should
Remote Jiao's image relay group includes the first positive light coke element and the second positive light coke element.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the feeler arm includes a beam splitter, positioned at beam splitting
The first positive light coke element and the first face array spy on two emitting light paths of beam splitter respectively in device input path
Device and the second area array detector are surveyed, between first area array detector and the second area array detector and beam splitter respectively
Provided with the second positive light coke element and the 3rd positive light coke element, the first positive light coke element and the second positive light coke element
Constitute complex focusing lens.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the feeler arm includes a thin beam splitter, positioned at thin
Positive light coke element in beam splitter input path and the first face array being located at respectively on thin two emitting light paths of beam splitter
Detector and the second area array detector.
It is preferred that, in above-mentioned whole-field optically chromatographic imaging system, the reference reflector is to move in the axial direction
Wedge shape, the mobile reference reflector makes its wedge-shaped bottom surface conjugation obtain outer finger to sample arm window towards the side surface of sample one
Print image, by the inclined-plane conjugation of wedge-shaped reference reflector to fingerprint in finger internal detection.
Accordingly, disclosed herein as well is a kind of interior fingerprint fast imaging and biological recognition system, including：
Whole-field optically chromatographic imaging system, at least gathers interior fingerprint image；
Identifying processing unit, to two dimensional image processing, generates identifying result.
It is preferred that, in above-mentioned interior fingerprint fast imaging and biological recognition system, in addition to：
Output unit, by identifying result and corresponding application platform or system relationship.
It is preferred that, in above-mentioned interior fingerprint fast imaging and biological recognition system, corresponding application platform or it is
Unite system or information management platform or access control system for Work attendance management system or containing login authentication.
It is preferred that, in above-mentioned interior fingerprint fast imaging and biological recognition system, the identifying processing unit includes
Gabor wavelet wave filter.
Compared with prior art, the utility model has the advantage of：The utility model overcomes existing fingerprint identification device
There is safety problem due to easily being cheated by fingerprint film, and finger surface is made dirty, overly wet or abrasion also results in identification
The problem of poor robustness such as failure.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 show the system side only containing interior fingerprint imaging system and recognition unit in the utility model specific embodiment
Block diagram；
Fig. 2 show in the utility model specific embodiment single containing interior fingerprint imaging system, recognition unit and output
The system block diagram of member；
Fig. 3 show the processing of the internal fingerprint image of recognition unit and identification process in the utility model specific embodiment
Figure；
Fig. 4 show the processing of the internal fingerprint image of recognition unit and outer fingerprint image in the utility model specific embodiment
With data fusion flow chart；
Fig. 5 show in the utility model specific embodiment output unit by identifying result to application system output relation frame
Figure；
Fig. 6 is shown in the utility model specific embodiment extracts fingerprint image in a width using whole-field optically coherent chromatograph
The theory diagram of picture；
Fig. 7 is shown in the utility model specific embodiment extracts fingerprint image in a width using whole-field optically coherent chromatograph
The theory diagram of picture and the outer fingerprint image of a width；
Fig. 8 is shown in the utility model specific embodiment extracts fingerprint image in two width using whole-field optically coherent chromatograph
The theory diagram of picture；
Fig. 9 show showing using the internal fingerprint imaging of whole-field optically coherent tomography in the utility model first embodiment
It is intended to；
Figure 10, which is shown in the utility model second embodiment, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 11, which is shown in the utility model 3rd embodiment, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 12, which is shown in the utility model fourth embodiment, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 13, which is shown in the embodiment of the utility model the 5th, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 14, which is shown in the utility model sixth embodiment, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 15, which is shown in the embodiment of the utility model the 7th, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 16, which is shown in the embodiment of the utility model the 8th, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 17, which is shown in the embodiment of the utility model the 9th, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 18, which is shown in the embodiment of the utility model the tenth, utilizes the internal fingerprint imaging of whole-field optically coherent tomography
Schematic diagram；
Figure 19 show the schematic diagram of the position configuration that fingerprint image is extracted in the utility model specific embodiment.
Embodiment
For the system in bio-identification, we will need to change systematic parameter, have been come with extremely low numerical aperture system
Into the organization internal imaging system of big penetration depth.
Further, using long-focal length lens (focal length is more than or equal to 100mm) in sample arm, or even object lens are cancelled, will
Numerical aperture is controlled below 0.1, and the depth of field of object space is less than or equal to 300 μm, preferably 300 μm.
Utility model people realizes numerical aperture for 0.05, in finger in 500 μm of depth fingerprint imaging whole-field optically
Coherent tomographic system.
The numerical aperture of whole-field optically coherent tomographic system also associates the depth of field that another important parameter is object space
DOF,
Wherein λcFor the centre wavelength of light source, NA is the numerical aperture of optical system.When being illuminated using halogen tungsten lamp, numerical aperture
Footpath is 0.05, and the depth of field of object space can reach 200 μm.Such big depth of field, it is allowed to which we change traditional perpendicular to optical axis
The mode of imaging, takes inclination or curved surface illumination, as long as being imaged object space in bodily tissue in specified field depth,
High picture quality can be obtained.For whole-field optically coherent tomographic system, the position of object space image sampling depends on ginseng
The shape of the reference reflector of arm is examined, the situation in inclination or curved planar reformation face is taken, as long as by the reference reflector of reference arm
Take correspondingly-shaped.The position of image planes collection, corresponding to corresponding position of the reference reflector in biological tissue of reference arm
Put, mobile or rotary reference reflector, then imaging surface is also accordingly moved and rotated.
The utility model is now with reference to accompanying drawing, wherein illustrative embodiment of the present utility model shows hereinafter more to fill
Divide ground description.The utility model is possible, however, it is possible to be presented as many different forms and to be limited to embodiments set forth here
It should not be construed；On the contrary, thesing embodiments are provided so that the disclosure will be thorough and complete, and it will fully pass on this reality
With the technical staff of new scope those skilled in the art.Identical numeral refers to identical element.As used herein
, term "and/or" includes any combination of the project listed by one or more correlations and all combinations.
Term as used herein is only used for describing the purpose of specific embodiment, is not intended to limit the utility model
's.As used herein, singulative " one ", " one " and "the" are also intended to include plural form, unless context is another
Explicitly point out outside.It will be further understood that, term " comprising ", and specified stated feature when using in this manual, integer,
Step, operation, the presence/of element or "comprising", and/or part, but do not preclude the presence or addition of one or more of the other feature,
Integer, step, operation, element, component and/or their group.
Unless otherwise defined, otherwise all terms (including technology and scientific terminology) used herein have such as ordinary skill
The identical implication understood in field belonging to the common the utility model of personnel.It will be further understood that, term, for example
Those should be interpreted as having implication with them in the context of association area and this explanation defined in common dictionary
Implication in book is consistent, and will not be in idealization or excessively explained formal meaning, unless explicitly defined herein.
" direct picture " refers to parallel or inclined being imaged in the plane of tissue surface.It should be further appreciated that
It is as used herein, from the conversion that frequency conversion is the time, the change between frequency and space to be equivalent to for optical information
Change.
As it will be understood by those skilled in the art that, interior fingerprint recognition system is usually using can be with high sensitivity and specificity
To determine a unique personal attribute.To obtain best result, the attribute should can not be easily modified or forge,
But the attribute rapidly and readily measured by the device of Noninvasive.We take second sometimes (or and passage) is measured as
Enhancing single dynamometry seeks that validity, or in order to compatible with traditional identifying system.For example, underlying attribute can be
The interior fingerprint that one people obtains from holographic field chromatographic imaging system, secondary attribute can be the image of the outer fingerprint of tradition.Auxiliary category
Property image can be simulation, but we can be compatible with conventional database systems with reference to underlying attribute image, is not leading
In the case of attribute database, secondary attribute database is measured first whether by identification, if be accepted, from primary attribute
Judgement is the possibility of biological living, if be confirmed, by the identity information of traditional data and primary attribute data correlation, automatically
Establish new primary attribute database.
With reference to shown in Fig. 1, in some examples of the utility model, interior fingerprint fast imaging and biological recognition system 900 only contain
There are interior fingerprint imaging system 500 and recognition unit 600.Wherein, imaging system 500 is used to obtain interior fingerprint image 220, and recognizes
Unit 600 is used to handling and recognizing interior fingerprint image 220
The interior fingerprint image 210 extracted corresponds to one plane of object space, and the plane is with finger skin surface into one
Inclination angle；Or the interior fingerprint image 210 extracted corresponds to one arbitrary surface of object space.
With reference to shown in Fig. 2, in some examples of the utility model, system 900 is single containing interior fingerprint imaging system 500, identification
Member 600 and output unit 700.Wherein, imaging system 500 is used to obtain interior fingerprint image 210, and recognition unit 600 is used to locate
Fingerprint image 210 in reason and identification, and identifying result 607 is used to drive the application systems different with connecting by output unit 700.
With reference to shown in Fig. 3, in some examples of the utility model, the processing and knowledge of fingerprint image 210 in 600 pairs of recognition unit
Other process.Interior fingerprint image 210 is filtered by Gabor wavelet wave filter 602, is formed uniqueness and is encoded in 603, with database
Reference encoder 605 is contrasted, and its result will carry out sentencing knowledge, the identifying result 607 that output receives or refused based on given threshold value.
With reference to shown in Fig. 4, in some examples of the utility model, fingerprint image 210 carries out physiology spy in 600 pairs of recognition unit
Analysis is levied, judges whether to come from live body, but without substance identification, using measured outer fingerprint 211 with tradition outside refer to
Contrast is identified in line database, forms identifying result in the way of inside and outside finger print data is merged, keeps the situation of high safety
Under, while keeping compatible to conventional fingerprint database.
With reference to shown in Fig. 5, in some examples of the utility model, recognition result 607 is applied to Work attendance management system
701st, access control system 702, information management platform 703, login authentication system 704, wherein access control system 702 again with electricity
Son lock connection.
With reference to shown in Fig. 6, in some examples of the utility model, it is weak that whole-field optically coherent chromatograph 501 includes at least one
Coherent illumination arm 10, a beam splitter 120, a reference arm 14, a sample arm 13, a computing system 200, a detection
Arm 15 and finger sample 210.Computing system 10 is used to calculate interior fingerprint image 210, including pretreatment enhancing etc..
With reference to shown in Fig. 7, in some examples of the utility model, it is weak that whole-field optically coherent chromatograph 501 includes at least one
Coherent illumination arm 10, a beam splitter 120, a reference arm 14, a sample arm 13, a computing system 200, a detection
Arm 15 and finger sample 210, it is similar with the structure discussed in figure 6 above.The difference is that adding a digital collecting unit 30
For being imaged with the external fingerprint 211 of conventional image forming process.
With reference to shown in Fig. 8, in some examples of the utility model, it is weak that whole-field optically coherent chromatograph 501 includes at least one
Coherent illumination arm 10, a beam splitter 120, a reference arm 14, a sample arm 13, a computing system 200, a detection
Arm 15 and finger sample 210, it is similar with the structure discussed in figure 6 above.The difference is that adding the additional extractions one of sample arm 40
Fingerprint image 212 in width.The fusion of fingerprint image can more improve degree of safety and robustness in two width.
With reference to shown in Fig. 9, in some examples of the utility model, illumination arm 10 is made up of time domain weak coherent light source 100, can be with
It is the wider area sources of spectrum such as LED, superradiance laser tube SLD, halogen tungsten lamp, centre wavelength may also may be used in near-infrared, system
With by these light sources through fiber bundle coupling come illuminator；Feeler arm 15 is by positive light coke element 150, area array detector
160 compositions, wherein feeler arm are conjugated interior finger print layer to the photosurface of detector 160 by positive light coke element 150.Face array detection
Device 160 can be two-dimensional CCD, InGaAs, CMOS or photodiode array；Reference arm 14 is by a reference reflector 140
Composition, can be silicon metal Silicon, germanium Gallium, zinc oxide Zinc oxide, metallic-membrane plating reflector or Yag crystal materials
Material；Sample arm 13 is made up of a glass window 130, and finger sample.
In imaging process, the photosurface conjugation of area array detector 160 is handed over to the plane of reflection of reference reflector 140 and optical axis
Point, and the reflecting surface of reference reflector 140 corresponds to inside finger sample 210 the interior fingerprint organized layer that will obtain image.The imaging
Section is normally at finger interior, favours optical axis, or is arbitrary shape curved surface, and outer fingerprint 211 will be unable in influence imaging
Hold, can so prevent from replicating fingerprint and finger surface is unclean does not influence recognition result.Special case, if reference reflector
140 conjugate to window 130 close to the side of finger sample 210, acquired fingerprint image 211 by be skin surface outer fingerprint.
In the present embodiment, numerical aperture is realized for 0.05, to fingerprint imaging in 500 μm of depth in finger.
With reference to shown in Figure 10, in some examples of the utility model, sample arm window 131 is used for Chromatically compensated, illumination arm 10
It is made up of time domain weak coherent light source 100；Feeler arm 15 is made up of positive light coke element 150, area array detector 160；Reference arm
14 are made up of a reference reflector 140；Sample arm 13 is made up of a glass window 130, and finger sample 210.Wherein join
Examine arm 14 and add window 131, be typically and sample arm window 130 is identical, for Chromatically compensated.
With reference to shown in Figure 11, in some examples of the utility model, illumination arm, which contains one, has power element, feeler arm
15 are made up of positive light coke element 150, area array detector 160；Reference arm 14 is made up of a reference reflector 140；Sample
Arm 13 is made up of a glass window 130, and finger sample 210, similar with the structure discussed in figure 9 above.Simply here its
Middle illumination arm adds positive light coke element 110 except time domain weak coherent light source 100, for spatial incoherent light source is higher
Efficiency is coupled in system.If the output end of spatial incoherent light source 100 is not uniform enough, positive light coke element 110 typically will
The output end of focal plane alignment light source 100 is used for collimating, and takes the mode of kohler's illumination so that image planes maintaining uniform illumination；If space is non-
The output end uniformity of coherent source 100 is very high, and positive light coke element 110 is generally used to the output end of spatial incoherent light source 100
It is imaged onto on the face of reference reflector 140 and is used for improving light energy coupling efficiency.
With reference to shown in Figure 12, in some examples of the utility model, rotatable and Shifted Reference reflector is used to gather difference
The interior dactylotype of the different angles of layer, illumination arm 10 is made up of time domain weak coherent light source 100, positive light focus element 110；Feeler arm 15
By positive light coke element 150, area array detector 160 is constituted；Sample arm 13 is by a glass window 130, and finger sample 210
Composition.Reference reflector 140 can rotate and along optical axis displacement, can so gather the interior fingerprint knot of the different angles of different layers
The light path of structure.
With reference to shown in Figure 13, in some examples of the utility model, light in source arm 10 can be improved containing one remote burnt relay component
The light path of light transmissioning efficiency.Feeler arm 15 is made up of positive light coke element 150, area array detector 160；Reference arm 14 is by one
Reference reflector 140 is constituted；Sample arm 13 is made up of a glass window 130, and finger sample 210.The present embodiment illumination arm
10 except time domain weak coherent light source 100, the afocal system also constituted comprising element 110 and 111, before light source 100 is projected onto 110
Focal plane, using strict kohler's illumination mode.
, can containing one remote burnt image relay component in feeler arm in some examples of the utility model with reference to shown in Figure 14
Reduce the light path of vignetting.Illumination arm 10 is made up of time domain weak coherent light source 100, positive light focus element 110；Reference arm 14 is by a ginseng
Reflector 140 is examined to constitute；Sample arm 13 is made up of a glass window 130, and finger sample 210.The present embodiment feeler arm 15
Remote burnt image relay group is constituted by positive light coke element 150 and 151, conjugation can reduce vignetting to finger object；
With reference to shown in Figure 15, in some examples of the utility model, light in source arm 10 is detected containing one remote burnt relay component
Light path in arm 15 also containing one remote burnt image relay component.Feeler arm 15 by positive light coke element 150 and 151 constitute it is remote
Burnt image relay group, area array detector 160 is constituted；Reference arm 14 is made up of a reference reflector 140；Sample arm 13 is by one
Individual glass window 130, and finger sample 210 are constituted.The present embodiment illumination arm 10 is also included except time domain weak coherent light source 100
The afocal system that lens 110 and 111 are constituted, light source 100 is projected onto 110 front focal planes, using strict kohler's illumination mode, hand
Finger 210 and reference reflector 140 are uniformly lighted.
With reference to shown in Figure 16, in some examples of the utility model, remote burnt image relay mixing beam splitter is taken to gather simultaneously
Inside and outside fingerprint image, can be with current outer fingerprint recognition system database compatibility through subsequent treatment light path.Illumination arm 10 by when
Domain weak coherent light source 100, positive light focus element 110 is constituted；Reference arm 14 is made up of a reference reflector 140；Sample arm 13 by
One glass window 130, and finger sample 210 are constituted.The present embodiment feeler arm 15 is except by positive light coke element 150 and 151
The remote burnt image relay group constituted, and area array detector 160, also add a detection channels：By positive light coke element
The 150 and 152 complex focusing lens constituted, and area array detector 161, the detection channels are contained by beam splitter 121
There is the optical signal of sample structure.The advantage of the structure be by adjusting positive light coke element 152, can be by area array detector
161 are individually conjugated to window 130 close to sample side, for measuring the outer image of fingerprint 211.And detector 160 is used to detect interior
Fingerprint image.In identification process, the identity information that outer fingerprint image obtains identified main body as index can be referred to interior
Line data correlation, meanwhile, the physiology knot of interior fingerprint image can still play false proof restriction effect.The system is big to having had
The state security department and large enterprise of type database, and fingerprint re-registers very difficult application scenarios has important meaning
Justice, completely compatible with original system can be upgraded to the higher state of degree of safety.
With reference to shown in Figure 17, in some examples of the utility model, thin spectroscope is taken while gathering inside and outside fingerprint image, can
Light path that can be with current outer fingerprint recognition system database compatibility through subsequent treatment.Illumination arm 10 by time domain weak coherent light source 100,
Positive light focus element 110 is constituted；Reference arm 14 is made up of a reference reflector 140；Sample arm 13 by a glass window 130,
Constituted with finger sample 210.The present embodiment feeler arm 15 is except by positive light coke element 150 and area array detector 160, also increasing
A new detection channels are added：Area array detector 161, the detection channels are obtained respectively by thin beam splitter 122 contains sample
The optical signal of structure, the thick bottom of part beam device 122 is smaller advantageously reduce aberration detector 161 into image aberration.The structure
Advantage is that it individually can be conjugated to window 130 close to sample side by adjusting area array detector 161, outer for measuring
The image of fingerprint 211.The system is to having had the state security department and large enterprise of large database, and fingerprint is re-registered
Very difficult application scenarios are significant, completely compatible with original system can be upgraded to the higher shape of degree of safety
State.
With reference to shown in Figure 18, in some examples of the utility model, reference reflector 140 takes wedge shape form, by position
Move the light path for the tomographic map that can extract inside and outside fingerprint respectively with weak coherent interference method.Illumination arm 10 is by time domain weak coherent light
Source 100, positive light focus element 110 is constituted；Feeler arm 15 is made up of positive light coke element 150 and area array detector 160；Sample arm
13 are made up of a glass window 130, and finger sample 210.Reference reflector 141 is can be along axle in the present embodiment reference arm
To mobile wedge shape, this structure can move reference reflector 141, its wedge-shaped bottom surface conjugation is arrived the court of sample arm window 130
The side surface of sample one obtains outer fingerprint image, will wedge-shaped reference reflector 141 inclined-plane conjugation to referring in finger internal detection
Line.By time-sharing format obtain in fingerprint 210 and outer fingerprint 211, to having had the state security department of large database and big
Type enterprise, and to re-register very difficult application scenarios significant for fingerprint, can be completely compatible with original system
Be upgraded to the higher state of degree of safety.
With reference to shown in Figure 19,141 to 148 original paper housings represent the effective biological tissue model available for unique mark identity
Enclose, length direction represents depth.Wherein, the configuration of reference arm 140 of the 141 expression weak coherence tomography systems of holographic field is to extract
Parallel to the fixed position image of sample surfaces, but imaging surface is curved surface, and the curved surface can correspond to the live body group of any depth
Structure is knitted, curved surface is typically in the field depth of sample arm；142 represent adjustable reference arm configurations, and sampling curved surface can be
Moved in the scope specified, obtain the tomographic map of any depth location；143 represent two static reference arm configurations, fixed
Obtain the tomographic map of the sampling curved surface of two positions spaced apart；144 represent that the acquirement of static state and sample surfaces are both not parallel
Also the tomographic map of the clinoplain of out of plumb；145 represent adjustable reference arm configuration, and it can be in specified angular range
It is interior to rotate, obtain the tomographic map of any angle object plane；146 represent two static reference arm configurations, and fixed obtain is spaced apart
Two rotation positions the tomographic map for favouring finger surface；147 represent two static reference arm configurations, fixed to obtain
The curved surface tomographic map of fingerprint in outer fingerprint and certain depth；148 represent two static reference arm configurations, fixed to obtain outer finger
Line with favour tomographic map of the finger surface into the interior fingerprint of certain angle.The configurations such as above 141-148 can also be mutually combined
Extracting multiple image is used to recognize.
The utility model improves the system design that penetration depth mainly takes low numerical aperture, and using scattering and absorbs
Low infrared illumination of coefficient etc. is realized.Wherein, low numerical aperture is general by using long-focal length lens in sample arm, even
Cancel object lens and obtain.Numerical aperture is general suitable below 0.1.
In above pattern, we disclose some examples of the present utility model.But, it then follows the utility model principle,
Many kinds are changed and modifications can not exhaustive enumeration.Accordingly, these examples are used only for general explanation, rather than limitation,
Priority declaration is shown in specific limitation of the present utility model.
Claims (18)
1. a kind of whole-field optically chromatographic imaging system, it is characterised in that including：
Illumination arm, including time domain weak coherent light source；
Reference arm, including reference reflector, the reference reflector are rotatable and/or removable along optical axis direction；
Sample arm, using long-focal length lens or cancellation object lens, the focal length of the long-focal length lens is more than or equal to 100mm；
Feeler arm, including area array detector, the photosurface conjugation of the area array detector to the reference reflector plane of reflection and
Optical axes crosspoint；
Beam splitter, is connected with the illumination arm, reference arm, sample arm and detector respectively.
2. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：Also include connecting with the feeler arm
The computing system connect.
3. whole-field optically chromatographic imaging system according to claim 2, it is characterised in that：Also include gathering outer fingerprint image
Digital collection unit, the digital collection unit is connected to the computing system.
4. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The sample arm is included to fingerprint
The first sample arm and the second sample arm that image is gathered respectively.
5. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The time domain weak coherent light source is
Area source is coupled by the area source through light shafts, and the area source is LED, superradiance laser tube SLD or halogen tungsten lamp.
6. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The area array detector is selected from
Two-dimensional CCD, InGaAs, CMOS or photodiode array.
7. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The reference reflector is selected from knot
Crystal silicon, germanium, zinc oxide, metallic-membrane plating reflector or Yag crystalline materials.
8. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The reference arm includes being used for color
The window of difference compensation.
9. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The illumination arm is also included sky
Between incoherent light source be coupled to system kind positive light coke element.
10. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The illumination arm includes remote burnt
System, afocal system includes the first lens and the second lens, and the second lens are located at the time domain weak coherent light source and the first lens
Between, the afocal system and time domain weak coherent light source constitute kohler's illumination mode, and the time domain weak coherent light source is projected onto the
The front focal plane of one lens.
11. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The feeler arm includes remote burnt
Image relay group, the remote burnt image relay group includes the first positive light coke element and the second positive light coke element.
12. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The feeler arm includes one point
Beam device, the first positive light coke element in beam splitter input path and respectively be located at two emitting light paths of beam splitter on
The first area array detector and the second area array detector, first area array detector and the second area array detector and
The second positive light coke element and the 3rd positive light coke element, the first positive light coke element and are respectively equipped between beam splitter
Two positive light coke elements constitute complex focusing lens.
13. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：It is thin that the feeler arm includes one
Beam splitter, the positive light coke element in thin beam splitter input path and respectively be located at thin two emitting light paths of beam splitter
On the first area array detector and the second area array detector.
14. whole-field optically chromatographic imaging system according to claim 1, it is characterised in that：The reference reflector is can
The wedge shape moved in the axial direction, mobile reference reflector makes its wedge-shaped bottom surface conjugation arrive sample arm window towards sample side table
Face obtains outer fingerprint image, by the inclined-plane conjugation of wedge-shaped reference reflector to fingerprint in finger internal detection.
15. a kind of interior fingerprint fast imaging and biological recognition system, it is characterised in that including：
Any described whole-field optically chromatographic imaging system of claim 1 to 14, at least gathers interior fingerprint image；
Identifying processing unit, to two dimensional image processing, generates identifying result.
16. interior fingerprint fast imaging according to claim 15 and biological recognition system, it is characterised in that：Also include：
Output unit, by identifying result and corresponding application platform or system relationship.
17. interior fingerprint fast imaging according to claim 16 and biological recognition system, it is characterised in that：It is corresponding
Application platform or system are Work attendance management system or the system or information management platform containing login authentication or entrance guard management system
System.
18. interior fingerprint fast imaging according to claim 15 and biological recognition system, it is characterised in that：At the identification
Managing unit includes Gabor wavelet wave filter.
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| CN201621394496.6U CN206576851U (en) | 2016-12-19 | 2016-12-19 | Whole-field optically chromatographic imaging system and biological recognition system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855613A (en) * | 2020-07-07 | 2020-10-30 | 杭州精准光学科技有限公司 | Dual-mode full-field optical coherence tomography method |
| JP2021508528A (en) * | 2017-12-27 | 2021-03-11 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | A device that images the skin |
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2016
- 2016-12-19 CN CN201621394496.6U patent/CN206576851U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021508528A (en) * | 2017-12-27 | 2021-03-11 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | A device that images the skin |
| JP7341145B2 (en) | 2017-12-27 | 2023-09-08 | コーニンクレッカ フィリップス エヌ ヴェ | Device that images the skin |
| CN111855613A (en) * | 2020-07-07 | 2020-10-30 | 杭州精准光学科技有限公司 | Dual-mode full-field optical coherence tomography method |
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