CN104680139B - Based on without burnt mirror self feed back with positioning iris collection device - Google Patents
Based on without burnt mirror self feed back with positioning iris collection device Download PDFInfo
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- CN104680139B CN104680139B CN201510070786.9A CN201510070786A CN104680139B CN 104680139 B CN104680139 B CN 104680139B CN 201510070786 A CN201510070786 A CN 201510070786A CN 104680139 B CN104680139 B CN 104680139B
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- burnt
- mirror
- iris
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
Abstract
The invention discloses a kind of self feed backs based on without burnt mirror and positioning iris collection device, belong to field of biological recognition, described device includes without burnt mirror and light source, and the rear without burnt mirror is provided with iris imaging optical system, and the rear of the iris imaging optical system is provided with imaging sensor；Wherein, the front surface or rear surface without burnt mirror, which are coated with, can penetrate near infrared light and reflect the film of visible light, the front surface without burnt mirror is identical with the radius of curvature of rear surface, and the center without burnt mirror, iris imaging optical system and imaging sensor is located on same axis.Compared with prior art, the configuration of the present invention is simple can not only be positioned fast and accurately, not influence original iris capturing optical system also, replaceable to arrange in pairs or groups, and durability is strong.
Description
Technical field
The present invention relates to field of biological recognition, a kind of self feed back based on without burnt mirror and positioning iris capturing dress are particularly related to
It sets.
Background technology
Iris, face, palmmprint, fingerprint identification technology belong to biological identification technology, and identification process is generally summarized as：Figure
As several steps such as acquisition, image procossing, identifications, and most primary and crucial step is exactly Image Acquisition, acquisition figure
The quality of image quality amount largely influences recognition efficiency.Especially as iris recognition technology, due to iris capturing region area
It is smaller, color is gloomy, ensure collect clear high quality iris image be even more entire iris recognition process success or failure it is important before
It carries.Current iris collection device is the iris image for ensureing acquisition high quality, on the one hand from optical system for collecting design aspect
It improves, improves the image quality of optically detecting head；On the other hand it improves, ensures in terms of the interactive experience of harvester and user
User is using can fast, easily hold best acquisition distance and angle when harvester, to acquire most clearly iris
Image.Existing iris collection device can be divided into：Zoom harvester and fixed-focus harvester, wherein zoom harvester need
Complicated Light Electrical control structure is wanted, Zoom control algorithm is equipped with, device volume is big, complicated, cost is high, and zoom speed
Degree is slower, cannot meet the needs of acquiring in real time, and the photoconductive structure of fixed-focus harvester is simple, low cost, and device needs carry
Show user to hold acquisition distance, needs the fitness requirement of user high.
For fixed-focus harvester, common method is to coordinate sound or indicator light prompt to guide by increasing range finder module
User, which is moved forward and backward, finds optimal acquisition distance, and such mode can cause to need to move repeatedly before and after user repeatedly can just find most
Good distance makes user generate and is impatient of mood.And there are also realize the alignment of user by optical technology in patent and determine
Position, such as Publication No.：CN103530617A, it is entitled：In the patent application of " iris is aligned and harvester ", using in iris
Acquisition portion front end increases planoconvex lens, and light source is set to around planoconvex lens so that light source converges the best of iris capturing through planoconvex lens
Position, it is exactly optimal acquisition position that such user, which is in light source convergent point,；Another Publication No. CN103413126A, title
For：In the patent application of " iris collection device ", using camera front end increase concave mirror, using concave surface at amplification rainbow
Film image helps the user to position.The planoconvex lens and concave mirror used in above two patent applications is with a fixed-focus
Away from lens, the simple front end for being positioned over iris capturing optical system can influence the imaging of original optical system, design
When must take into consideration the optical texture of iris capturing optical system, comprehensive design could neither influence to acquire the imaging of optical system
Road, and can realize alignment and positioning action, such disadvantage keeps whole device Optical System Design more complex, and planoconvex lens or recessed
Face mirror must be matched with specific acquisition optical system, cannot replace collocation, poor universality.
Invention content
The present invention provides a kind of self feed back based on without burnt mirror and positioning iris collection device, and the apparatus structure is simple, no
It only can fast and accurately position, not influence original iris capturing optical system also, replaceable to arrange in pairs or groups, durability is strong.
In order to solve the above technical problems, present invention offer technical solution is as follows：
A kind of self feed back based on without burnt mirror and positioning iris collection device, including without burnt mirror and light source, it is described without burnt mirror
Rear be provided with iris imaging optical system, the rear of the iris imaging optical system is provided with imaging sensor；Wherein,
The front surface or rear surface without burnt mirror are coated with can penetrate near infrared light and reflect the film of visible light, described without burnt mirror
Front surface is identical with the radius of curvature of rear surface, the centre bit without burnt mirror, iris imaging optical system and imaging sensor
In on same axis.
Further, it is described without burnt mirror be without burnt convex mirror, the position without burnt convex mirror makes user be in predetermined rainbow
When film is acquired in distance range, it can see that the image of face is full of entire minute surface from without burnt convex mirror.
Further, it is described without burnt mirror be without burnt concave mirror, the position without burnt concave mirror makes user be in predetermined rainbow
It, can be from without burnt concave mirror it can be clearly seen that the image of eyes when film is acquired in distance range.
Further, the wave-length coverage for the near infrared light that the film penetrates is 700-900nm.
Further, the iris imaging optical system is the fix-focus lens group of at least 2 lens composition.
Further, the surface of the lens is coated with near-infrared anti-reflection film.
Further, described image sensor is CCD or cmos sensor.
Further, the infrared light supply is near-infrared LED lamp.
Further, the material without burnt mirror is glass or plastics.
The invention has the advantages that：
Compared with prior art, with positioning iris collection device, light source is sent out for the self feed back of the invention based on without burnt mirror
Go out near infrared light, be irradiated on the iris of user and be reflected into without on burnt mirror, meanwhile, extraneous visible light can also be irradiated to no coke
On mirror, due to without burnt mirror front surface or rear surface be coated with and can penetrate near infrared light and reflect the film of visible light so that absolutely
Most of near infrared spectrum is penetrated without burnt mirror, is imaged into iris imaging optical system and on the image sensor, image sensing
Optical signal on iris imaging optical system imaging to sensor is converted into electric signal by device, completes the acquisition of iris information；And
Visible spectrum is reflected without burnt mirror so that mirror effect is presented in no burnt mirror surface, it can be seen that the image of user oneself gives use
Family respective feedback makes user adjust the position of oneself, can fast and accurately position, and acquires clearer iris image；Due to
It is identical without two curvature radius of burnt mirror so that light not will produce after without burnt mirror and be converging or diverging with phenomenon, not interfere with original
The imaging for having iris imaging optical system need not consider the optical texture of iris capturing optical system in design so that entire
Iris collection device is simple in structure, neither influences the imaging optical path of iris imaging optical system, and can realize that alignment and positioning are made
With, collocation can be replaced, it is versatile.
Therefore the present invention based on without burnt mirror self feed back and positioning iris collection device it is simple in structure, can not only it is quick,
Accurately positioning, does not influence original iris capturing optical system also, replaceable to arrange in pairs or groups, and durability is strong.
Description of the drawings
Fig. 1 be the present invention based on without burnt mirror self feed back with positioning iris collection device structural schematic diagram；
Fig. 2 is that the structure of one embodiment based on self feed back and positioning iris collection device without burnt mirror of the invention is shown
It is intended to；
Fig. 3 is the imaging schematic diagram without burnt convex mirror；
Fig. 4 is for human eye and without burnt convex mirror imaging optical system index path；
Fig. 5 is the structure based on self feed back and another embodiment of positioning iris collection device without burnt mirror of the present invention
Schematic diagram；
Fig. 6 is for human eye and without burnt concave mirror imaging optical system index path.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of self feed back based on without burnt mirror and positioning iris collection device, as shown in Figure 1, including no coke
The rear of mirror 1 and light source 4, no burnt mirror 1 is provided with iris imaging optical system 2, and the rear of iris imaging optical system 2 is provided with
Imaging sensor 3；Wherein, the front surface or rear surface of no burnt mirror 1, which are coated with, can penetrate near infrared light and reflect visible light
Film, the front surface without burnt mirror 1 is identical with the radius of curvature of rear surface, without burnt mirror 1, iris imaging optical system 2 and image sensing
The center of device 3 is located on same axis.In Fig. 1,6 be face, and 5 be eyes.
In the present invention, light source sends out near infrared light, is irradiated on the iris of user and is reflected into without on burnt mirror, meanwhile, outside
The visible light on boundary can be also irradiated to without on burnt mirror, due to without burnt mirror front surface or rear surface be coated with and can penetrate near infrared light
And reflect the film of visible light so that most near infrared spectrums are penetrated without burnt mirror, into iris imaging optical system and are being schemed
As being imaged on sensor, the optical signal on iris imaging optical system imaging to sensor is converted into telecommunications by imaging sensor
Number, complete the acquisition of iris information；And visible spectrum is reflected without burnt mirror so that mirror effect is presented in no burnt mirror surface, can be with
The image for seeing user oneself gives user's respective feedback, and user is made to adjust the position of oneself, can fast and accurately position,
Acquire clearer iris image；Due to identical without two curvature radius of burnt mirror so that light not will produce after without burnt mirror
It is converging or diverging with phenomenon, does not interfere with the imaging of original iris imaging optical system, need not consider iris capturing light in design
The optical texture of system so that entire iris collection device is simple in structure, neither influences the imaging of iris imaging optical system
Light path, and can realize alignment and positioning action, collocation can be replaced, it is versatile.
Therefore the present invention based on without burnt mirror self feed back and positioning iris collection device it is simple in structure, can not only it is quick,
Accurately positioning, does not influence original iris capturing optical system also, replaceable to arrange in pairs or groups, and durability is strong.
As an embodiment of the present invention, as shown in Fig. 2, being without burnt convex mirror 1 ', without burnt convex mirror 1 ' without burnt mirror
When position makes user be in predetermined iris capturing distance range, it can see that the image of face 6 fills from without burnt convex mirror 1 '
Full entire minute surface.
The front end for being located at iris imaging optical system without burnt convex mirror of the present embodiment, and it is located at same central shaft, it is two
The identical lens of curvature radius, i.e. R1=R2, R1For the outer surface without burnt convex mirror, i.e., close to the one side of user, R2For no coke
The inner surface of convex mirror, the i.e. one side close to iris imaging optical system, R1Or R2Face, which is coated with, can penetrate near infrared light and reflect
The film of visible light, since the visible light overwhelming majority reflects so that mirror effect is presented without burnt convex mirror surface, it can be seen that user
The image of the face of oneself gives user's respective feedback, so that user is adjusted position according to face image, when user can be from no coke
When the face image seen in convex mirror is just full of entire minute surface, it is in iris optimal acquisition optimum distance.
When the present embodiment is in use, as shown in figure 3, user watches attentively without burnt convex mirror, according to iris imaging optical system
Distance, object space range, the dimension and shape (round or ellipse) without burnt convex mirror are acquired, the curvature without burnt convex mirror is adjusted
Radius and position, when user just at iris collection device optimal acquisition apart from when, user sees from without burnt convex mirror
Oneself face image just be full of entire minute surface；When user be not at optimal acquisition apart from when, user is from without burnt convex mirror
Oneself face image seen cannot be full of entire minute surface, only account for a part for minute surface or can only see part face image.
The human eye of the present embodiment with it is as shown in Figure 4 without burnt convex mirror imaging optical system index path comprising opthalmic optics
Model, object space range and without burnt convex mirror, wherein opthalmic optics' model are by the cornea of human eye, liquid body, pupil, crystalline
The structures such as body, vitreum are equivalent to corresponding lens, and retina is equivalent to imaging sensor, constitute opthalmic optics and are imaged system
System, object space range, that is, face are able to image to the range size without burnt convex mirror, will without burnt convex mirror primarily as speculum
Face throws incoming light and reflects into human eye.Human eye with without burnt convex mirror system light route be the visible light projected by face
Line is incident on without burnt convex mirror, is entered without burnt convex mirror inner surface or outer surface whole or overwhelming majority reflection, reflection light
Human eye is imaged onto human eye retina by the convergence of opthalmic optics' lens group, and retina changes light information biography into brain and can recognize that
Image information, i.e., whole process be user see oneself face image from without burnt convex mirror.In human eye and without burnt convex mirror structure
At optical system in, according to the acquisition distance L of determining iris imaging optical system (i.e. without burnt convex mirror surface center to people
The distance at eye surface center), the dimension D without burnt convex mirror, object space range H (face's coverage), adjusting and optimizing is without burnt convex surface
Radius of curvature (the R of mirror1、R2), to realize at iris collection device optimal acquisition distance, user sees from without burnt convex mirror
Oneself face image just be full of entire minute surface effect, realization quick and precisely position.
For example, simulating human eye in optical design software with without burnt convex mirror imaging optical system, iris imaging light is set
The acquisition distance L of system is 25cm (distance i.e. without burnt convex mirror surface center to human eye surface center), without burnt convex mirror
For circle, diameter D=16mm, shooting object space range H, that is, human face region size is that (data are that can fit to long * wide=25*16cm
With most of face), adjusting and optimizing is without burnt convex mirror radius of curvature R1,R2, in R1=R2When=42mm so that face is (long
25cm) the light full illumination of range reflection at distance 25cm without burnt convex mirror region (long 16mm), and through mirror-reflection
Light reflects into eyes imaging to retina, is just full of facial image without burnt convex mirror surface to which user sees.
As an alternative embodiment of the invention, as shown in figure 5, being without burnt concave mirror 1 ", without burnt concave mirror 1 " without burnt mirror
Position when user being made to be in predetermined iris capturing distance range, can be from without burnt concave mirror 1 " it can be clearly seen that eyes 5
Image.
The front end for being located at iris imaging optical system without burnt concave mirror of the present embodiment, and it is located at same central shaft, it is two
The identical lens of curvature radius, i.e. R1=R2, R1For the outer surface without burnt concave mirror, i.e., close to the one side of user, R2For no coke
The inner surface of concave mirror, the i.e. one side close to iris imaging optical system, R1Or R2Face, which is coated with, can penetrate near infrared light and reflect
The film of visible light, since the visible light overwhelming majority reflects so that mirror effect is presented without burnt concave mirror surface, it can be seen that user
The image of the eyes of oneself gives user's respective feedback, makes Image Adjusting position of the user according to eyes, when user can be from nothing
When seeing clearly eye image in burnt concave mirror, it is in iris optimal acquisition optimum distance.
When the present embodiment is in use, user watches attentively without burnt concave mirror, according to the acquisition of iris imaging optical system distance, object
Square range, the dimension and shape (round or ellipse) without burnt concave mirror adjust the radius of curvature without burnt concave mirror and position
Set, when user just at iris collection device optimal acquisition apart from when, oneself eye that user sees from without burnt concave mirror
Image is most clear；When user be not at optimal acquisition apart from when, oneself eye image mould that user sees from without burnt concave mirror
Paste is unintelligible.
The human eye of the present embodiment with it is as shown in Figure 6 without burnt concave mirror imaging optical system index path comprising opthalmic optics
Model, object space range and without burnt concave mirror, wherein opthalmic optics' model be by the cornea of human eye, liquid body, pupil, crystalline lens,
The structures such as vitreum are equivalent to corresponding lens, and retina is equivalent to imaging sensor, constitute opthalmic optics' imaging system, object
Square range, that is, human eye area is able to image to the range size without burnt concave mirror, will without burnt concave mirror primarily as speculum
Eyes throw incoming light and reflect into human eye.Human eye with without burnt concave mirror system light route be the visible light projected by eyes
Line is incident on without burnt concave mirror, and without burnt concave mirror surface whole or overwhelming majority reflection, reflection light enters human eye, through remarkable
The convergence of optics of the eye lens group is imaged onto human eye retina, and retina changes light information biography into brain identifiable image information,
I.e. whole process is that user sees oneself eye image from without burnt concave mirror.In human eye and the optical system without burnt concave mirror composition
In, according to the acquisition distance L of determining iris imaging optical system (i.e. without burnt concave mirror centre of surface to human eye surface's centre-to-centre spacing
From), the dimension D of concave mirror, object space range H (eyes coverage), radius of curvature (R of the adjusting and optimizing without burnt concave mirror1、R2),
When realizing at iris collection device optimal acquisition distance, oneself eye image that user sees from concave mirror is most clear,
Realization quick and precisely positions.
For example, simulating human eye in optical design software with without burnt concave mirror imaging optical system, iris imaging light is set
The acquisition distance L of system is 10cm (distance i.e. without burnt concave mirror centre of surface to human eye surface center), without burnt concave mirror
For circle, diameter D=16mm, shooting object space range H, that is, human eye area size be that (data is can be with to long * wide=3.2*2.4cm
It is applicable in most of human eye), adjusting and optimizing concave mirror radius of curvature R1,R2, in R1=R2When=280mm so that human eye is (long
3.2cm) concave mirror region (long 16mm) of the light full illumination of range reflection at distance 10cm, and through mirror-reflection light
It reflects into eyes imaging to retina, to which user just sees clearly eye image in minute surface at this time.
As an improvement of the present invention, the wave-length coverage for the near infrared light that above-mentioned film penetrates is 700-900nm, this wavelength
Near infrared light iris texture information can preferably be presented.
Preferably, iris imaging optical system is the fix-focus lens group of at least 2 lens composition, and fix-focus lens group can root
Need to be designed to different structures according to different.
In order to make near infrared light is as much as possible to penetrate fix-focus lens group, it is anti-reflection that the surfaces of lens can be coated with near-infrared
Film.
Preferably, imaging sensor be CCD or cmos sensor, will be on iris imaging optical system imaging to sensor
Optical signal is converted into electric signal.
Further, infrared light supply is near-infrared LED lamp, simple and convenient.
The material of no burnt mirror is glass or plastics, to increase light transmittance first choice glass material.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of self feed back based on without burnt mirror and positioning iris collection device, which is characterized in that including without burnt mirror and light source, institute
It states the rear without burnt mirror and is provided with iris imaging optical system, the rear of the iris imaging optical system is provided with image sensing
Device；Wherein, the front surface or rear surface without burnt mirror, which are coated with, can penetrate near infrared light and reflect the film of visible light, described
Front surface without burnt mirror is identical with the radius of curvature of rear surface, described without burnt mirror, iris imaging optical system and imaging sensor
Center be located on same axis.
2. the self feed back according to claim 1 based on without burnt mirror and positioning iris collection device, which is characterized in that described
No burnt mirror be without burnt convex mirror, when the position without burnt convex mirror makes user be in predetermined iris capturing distance range, energy
Enough images that face is seen from without burnt convex mirror are full of entire minute surface.
3. the self feed back according to claim 1 based on without burnt mirror and positioning iris collection device, which is characterized in that described
No burnt mirror be without burnt concave mirror, when the position without burnt concave mirror makes user be in predetermined iris capturing distance range, energy
Enough images that can be clearly seen that eyes from without burnt concave mirror.
4. the self feed back according to claim 2 or 3 based on without burnt mirror and positioning iris collection device, which is characterized in that
The wave-length coverage for the near infrared light that the film penetrates is 700-900nm.
5. the self feed back according to claim 4 based on without burnt mirror and positioning iris collection device, which is characterized in that described
Iris imaging optical system is the fix-focus lens group of at least 2 lens composition.
6. the self feed back according to claim 5 based on without burnt mirror and positioning iris collection device, which is characterized in that described
The surface of lens is coated with near-infrared anti-reflection film.
7. the self feed back according to claim 4 based on without burnt mirror and positioning iris collection device, which is characterized in that described
Imaging sensor is CCD or cmos sensor.
8. the self feed back according to claim 4 based on without burnt mirror and positioning iris collection device, which is characterized in that described
Light source is near-infrared LED lamp.
9. according to claim 5-8 any claims based on without burnt mirror self feed back with positioning iris collection device,
It is characterized in that, the material without burnt mirror is glass or plastics.
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| CN201510070786.9A CN104680139B (en) | 2015-02-11 | 2015-02-11 | Based on without burnt mirror self feed back with positioning iris collection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510070786.9A CN104680139B (en) | 2015-02-11 | 2015-02-11 | Based on without burnt mirror self feed back with positioning iris collection device |
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| CN104680139B true CN104680139B (en) | 2018-09-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751836A (en) * | 1994-09-02 | 1998-05-12 | David Sarnoff Research Center Inc. | Automated, non-invasive iris recognition system and method |
| CN101770573A (en) * | 2010-01-14 | 2010-07-07 | 沈洪泉 | Automatic focusing iris image imaging device for iris recognition and control method thereof |
| CN103530617A (en) * | 2013-10-22 | 2014-01-22 | 南京中科神光科技有限公司 | Iris alignment and acquisition device |
| CN104007534A (en) * | 2014-06-05 | 2014-08-27 | 舜宇光学(中山)有限公司 | Super-depth-of-field narrow-band-pass identification lens capable of obtaining iris images of two eyes simultaneously |
-
2015
- 2015-02-11 CN CN201510070786.9A patent/CN104680139B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751836A (en) * | 1994-09-02 | 1998-05-12 | David Sarnoff Research Center Inc. | Automated, non-invasive iris recognition system and method |
| CN101770573A (en) * | 2010-01-14 | 2010-07-07 | 沈洪泉 | Automatic focusing iris image imaging device for iris recognition and control method thereof |
| CN103530617A (en) * | 2013-10-22 | 2014-01-22 | 南京中科神光科技有限公司 | Iris alignment and acquisition device |
| CN104007534A (en) * | 2014-06-05 | 2014-08-27 | 舜宇光学(中山)有限公司 | Super-depth-of-field narrow-band-pass identification lens capable of obtaining iris images of two eyes simultaneously |
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| CN104680139A (en) | 2015-06-03 |
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