CN108498067A - A kind of device and method of digitlization keratometry - Google Patents
A kind of device and method of digitlization keratometry Download PDFInfo
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- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
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Abstract
The invention discloses a kind of devices of digitlization keratometry, including：Target image acquisition device, coherent interference range unit, keratometry module；The target image device is used to obtain the target image at the eye cornea center of user to be detected；When the optical path and reference path that the coherent interference range unit is used to emit in fiber coupler interfere, obtains the eye cornea center and extremely measure the distance between reference substance；The keratometry module is used to, according to the distance between described eye cornea center to the measurement reference substance and preset rules, calculate the eye cornea curvature of the user to be detected；The device of digitlization keratometry provided by the present invention improves the accuracy of eye cornea curvature measurement.The invention also discloses a kind of methods of digitlization keratometry, have above-mentioned advantageous effect.
Description
Technical field
The present invention relates to human eye detection technical field, the device more particularly to a kind of digitlization keratometry and side
Method.
Background technology
Cornea is the transparent part of human eye foremost, and most refractive power is provided for human eye.The detection of corneal curvature can
With judge human eye whether there is or not stray light, the certain diseases of diagnosis eyes, instruct corneal diopter corrective procedure and for wear contact eye
Mirror provides the effects that science is tested with foundation.Therefore, accurately measuring the corneal curvature of human eye is necessary.
The measurement method of eye cornea curvature it is most of all using by a Reference formed after human eye reflects as
Size again by optical imagery object lens re-imaging on the image sensor, the size by resolving picture in image measures indirectly
The method of the size of corneal curvature.This method also needs to measurement reference substance and arrives corneal vertex other than resolving the size of image
The size of distance and image-forming objective lens magnifying power.
Existing keratometer or rafractive mostly by the clarity of formed image in observation sensor come
Human eye (object of reference is generally static with respect to human eye with imaging system) at a distance from measuring instrument is adjusted manually.Existing measuring instrument
Eye cornea vertex be that and image-forming objective lens are always by image-forming objective lens whether determined by blur-free imaging to the distance with reference to object
When having certain depth of field, therefore cannot be guaranteed to measure corneal vertex to the distance with reference to object be point-device.And it is general
The magnifying power of image-forming objective lens is not stable, can change with slightly moving for human eye, can equally cause measurement accuracy
Decline.
In summary as can be seen that the accuracy for how improving eye cornea curvature measurement result is have at present it is to be solved
Problem.
Invention content
The object of the present invention is to provide a kind of devices of digitlization keratometry, have solved human eye angle in the prior art
The low problem of film curvature measurement result accuracy rate.The present invention also provides a kind of methods of digitlization keratometry, have
Above-mentioned advantageous effect.
In order to solve the above technical problems, the present invention provides a kind of device of digitlization keratometry, including：Target figure
As acquisition device, coherent interference range unit, keratometry module；The target image device is for obtaining use to be detected
The target image at the eye cornea center at family；The optical path that the coherent interference range unit is used to emit in fiber coupler
When being interfered with reference path, obtains the eye cornea center and extremely measure the distance between reference substance；The corneal curvature
Measurement module is used for according to the distance between described eye cornea center to the measurement reference substance and preset rules, described in calculating
The eye cornea curvature of user to be detected.
Preferably, the target image acquisition device includes：Round LED lamp group, optical imagery object lens, imaging sensor,
Processor；Wherein, the human eye of user to be detected, the round LED lamp group, the optical imagery object lens and described image sensor
In same optical axis；
The round LED lamp group is used to irradiate the face of user to be detected, in order to the light of round LED lamp group transmitting
Line is incident to described image sensor after reflexing to the optical imagery object lens by the face of the user to be detected；The place
Facial image information of the reason device for the user to be detected collected to described image sensor is handled, in order to logical
Cross the target image at the eye cornea center of the mobile acquisition user to be detected of control three-dimensional mobile platform.
Preferably, the processor is specifically used for：When described image sensor collects the face of the user to be detected
After image information, moving up and down and moving left and right for the three-dimensional mobile platform is controlled using SVM identification human eye algorithms, and pass through
SVM identification pupil of human algorithms obtain the accurate position of the human eye to be detected, in order to obtain the user's to be detected
Eye image；
After the eye image for obtaining the user to be detected, simultaneously using the positioning of hough loop truss pupil of human CENTER ALGORITHMs
The human eye center for identifying the user to be detected, in order to obtain the oculocentric image of people of the user to be detected；
After the oculocentric image of people for obtaining the user to be detected, controlled using auto-focusing algorithm described three-dimensional mobile
The back-and-forth motion of platform, in order to obtain the user to be detected eye cornea center target image.
Preferably, the relevant range unit includes：Laser light source, fiber coupler, the first optical fiber collimator, light splitting rib
Mirror, the second optical fiber collimator, speculum, one-dimensional movement platform, grating scale, photodetector；
The light that the laser light source is sent out is divided into optical path and reference path after the fiber coupler, described
Optical path is incident to the Amici prism by the first optical fiber collimator, after be incident to the eye cornea center after, reflection
To the fiber coupler；And the optical path keeps coaxial with the optical imagery object lens；
After the reference path after second optical fiber collimator by being incident to the speculum, the optical fiber is reflexed to
Coupler；
The speculum is installed on the one-dimensional movement platform, and the one-dimensional movement stage+module is in the grating scale
On；
When the photodetector detects that the optical path and the reference path are sent out in the fiber coupler
When raw interference, the light path value on the grating scale is recorded using the processor, the light path value is the eye cornea center
Extremely the distance between described round LED lamp group.
Preferably, the keratometry module be specifically used for according to the enlargement ratios of the optical imagery object lens and
The eye cornea vertex measures the corneal curvature of the human eye to be detected to the distance of the round LED lamp group.
Preferably, it after the keratometry of a human eye for completing the user to be detected, controls described three-dimensional mobile
Platform moves pre-determined distance to the direction of another human eye, in order to measure the corneal curvature of another human eye.
The present invention also provides a kind of methods of digitlization keratometry, including：Obtain the cornea of human eye to be detected
The target image at center；When the optical path and reference path of fiber coupler transmitting interfere, the human eye angle is obtained
Center membrane extremely measures the distance between reference substance；According to the distance between described eye cornea center to the reference substance and preset
Rule calculates the corneal curvature of the human eye to be detected.
Preferably, the target image of the corneal center for obtaining human eye to be detected includes：It is irradiated using round LED lamp group
The face of user to be detected is reflected in order to the light of round LED lamp group transmitting by the face of the user to be detected
It is incident to imaging sensor after to optical imagery object lens；
At facial image information using the processor user to be detected collected to described image sensor
Reason, in order to the target figure at the eye cornea center of the mobile acquisition user to be detected by controlling three-dimensional mobile platform
Picture.
Preferably, the face-image using the processor user to be detected collected to described image sensor
Information carries out processing：
After described image sensor collects the facial image information of the user to be detected, human eye is identified using SVM
Algorithm controls moving up and down and moving left and right for the three-dimensional mobile platform, and identifies that pupil of human algorithm obtains institute by SVM
The accurate position for stating human eye to be detected, in order to obtain the eye image of the user to be detected；
After the eye image for obtaining the user to be detected, simultaneously using the positioning of hough loop truss pupil of human CENTER ALGORITHMs
The human eye center for identifying the user to be detected, in order to obtain the oculocentric image of people of the user to be detected；
After the oculocentric image of people for obtaining the user to be detected, controlled using auto-focusing algorithm described three-dimensional mobile
The back-and-forth motion of platform, in order to obtain the user to be detected eye cornea center target image.
Preferably, described according to the distance between described eye cornea center to the reference substance and preset rules, it calculates
The corneal curvature of the human eye to be detected includes：
According to the enlargement ratio of the optical imagery object lens and the eye cornea vertex to the round LED lamp group
Distance measures the eye cornea curvature of the user to be detected.
The device of digitlization keratometry provided by the present invention, at the eye cornea center for obtaining user to be detected
Most clearly as rear, using fiber coupler emission measurement light path and reference path, when the optical path and the reference
When light path interferes, obtains the eye cornea center and extremely measure the distance between reference substance.According in the eye cornea
The heart calculates the eye cornea curvature of the user to be detected to described measurement the distance between reference substance.The application is done using relevant
The method for relating to ranging measures eye cornea center to the distance between reference substance is measured, improve institute's ranging from accuracy, solution
Cornea measuring instrument in the prior art of having determined cannot directly measure the survey caused by corneal vertex to the distance for measuring object of reference
The not high problem of accuracy of measurement.
Description of the drawings
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing is briefly described needed in technology description, it should be apparent that, the accompanying drawings in the following description is only this hair
Some bright embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of the device of digitlization keratometry provided by the present invention；
Fig. 2 is the structure chart of three-dimensional mobile platform；
Fig. 3 is the structure diagram of another device for digitizing keratometry provided by the present invention；
Fig. 4 is the structure chart of round LED lamp group；
Fig. 5 is a kind of flow chart of the method for digitlization keratometry provided in an embodiment of the present invention.
Specific implementation mode
Core of the invention is to provide a kind of device of digitlization keratometry, improves eye cornea curvature measurement
Accuracy.The present invention also provides a kind of methods of digitlization keratometry, have above-mentioned advantageous effect.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structure diagram of the device of digitlization keratometry provided by the present invention；
The digitlization keratometry device that the present embodiment is provided includes：Target image acquisition device, coherent interference range unit,
Keratometry module；The wherein described target image device is used to obtain the target figure at the eye cornea center of user to be detected
Picture；When the optical path and reference path that the coherent interference range unit is used to emit in fiber coupler interfere, obtain
The eye cornea center the distance between to preset reference object；The keratometry module is used for according to the human eye
For corneal center to the distance between the preset reference object and preset rules, the eye cornea for calculating the user to be detected is bent
Rate.
The target image acquisition device, coherent interference range unit, keratometry module are positioned over three-dimensional movement
On platform.As shown in Fig. 2, the three-dimensional mobile platform includes support plate, feed screw nut, the silk to match with the feed screw nut
Thick stick, up and down motion motor, side-to-side movement motor and move forward and backward motor；Wherein, the support plate is for placing the target figure
As acquisition device, coherent interference range unit, keratometry module；The feed screw nut is fixed in the support plate；
The feed screw nut is fixed in the support plate；The motor that moves up and down drives the guide screw movement, described in control
Feed screw nut moves up and down；The motor that moves left and right is moved with movable slider and connecting plate on guide rail；The back-and-forth motion electricity
Machine band movable slider and connecting plate move on guide rail；The support plate is controlled respectively by the motor of three direction of motion, to real
Automatic three-dimensional locomotive function is showed.
The digitlization keratometry device that the present embodiment is provided, using coherent interference ranging method measure described in
The human eye of user to be detected improves the accuracy of keratometry, solves existing the distance between to preselected reference object
Cornea measuring instrument in technology cannot directly measure the measurement accuracy caused by corneal vertex to the distance for measuring object of reference not
High problem.
Referring to FIG. 3, Fig. 3 is the structural frames of another device for digitizing keratometry provided by the present invention
Figure；
As shown in figure 3, the target image acquisition device that the present embodiment is provided may include round LED lamp group 2, optics at
As object lens 3, imaging sensor 4, processor 5；Wherein, the human eye 1 of user to be detected, the round LED lamp group 2, the optics
Image-forming objective lens 3 and described image sensor 4 are located in same optical axis；
The round LED lamp group 2 is used to irradiate the face of user to be detected, in order to the round LED lamp group 2 transmitting
Light is reflexed to after the optical imagery object lens 3 by the face of the user to be detected and is incident to described image sensor 4, institute
The arrangement mode for stating round LED lamp group 2 can be as shown in Figure 4.
In the present embodiment, doubly telecentric light path design may be used in the optical imagery object lens；Doubly telecentric light path has super
The big depth of field, the characteristic that magnifying power is kept constant in certain object distance variation range；Therefore it is easier to obtain eye cornea center
Clear image reduces the error caused by human eye weak vibrations in measurement process；And double telecentric optical system imaging clearly, it is abnormal
Become very small so that the result of Image Information Processing is more accurate in digitlization keratometry device, further to improve
The accuracy of keratometry result.
The processor 5 for the user to be detected collected to described image sensor facial image information into
Row processing, in order to the target at the eye cornea center of the mobile acquisition user to be detected by controlling three-dimensional mobile platform
Image.The processor 5 may include the image processing unit handled to described image sensor the image collected, right
The digital processing element that image information after the completion of described image processing unit processes is handled.
After described image sensor 4 collects the facial image information of the user to be detected, the processor 5 uses
SVM identification human eye algorithms control moving up and down and moving left and right for the three-dimensional mobile platform, and identify pupil of human by SVM
Algorithm obtains the accurate position of the human eye to be detected, in order to obtain the eye image of the user to be detected；Obtain institute
After the eye image for stating user to be detected, the processor 5 is positioned and is identified using hough loop truss pupil of human CENTER ALGORITHMs
The human eye center of the user to be detected, in order to obtain the oculocentric image of people of the user to be detected；It is waited for described in acquisition
After the oculocentric image of people for detecting user, the processor 5 controls the three-dimensional mobile platform using auto-focusing algorithm
Be moved forward and backward, in order to obtain the user to be detected eye cornea center target image.
The three-dimensional mobile platform is controlled in the present embodiment using the human eye location algorithm of SVM and Hough loop truss to carry out
It is mobile, so that imaging optical system and the optical axis of coherent interference system is directed at the center of human eye, to realize Automatic-searching human eye, from
The function of dynamic alignment human eye center and auto-focusing.
In the present embodiment, the target image processing unit can also include display screen 6, and the display screen 6 can be
After the processor 5 handles 4 collected eye image information of described image sensor, present respectively described to be detected
The face-image of user, the image of eye image and eye cornea image.
In the present embodiment, the relevant range unit includes laser light source 7, fiber coupler 8, the first optical fiber collimator
9, Amici prism 10, the second optical fiber collimator 11, speculum 12, one-dimensional movement platform 13, grating scale 14, photodetector 15.
Wherein, the laser light source 7 is broad band laser light source；The fiber coupler 8 is 2 × 2 fiber couplers.
After the clear image at eye cornea center of the user to be detected is presented on the display screen 6, the laser
7 launching fiber of light source, 2 × 2 fiber coupler 8 are divided into optical path all the way and all the way reference path.The optical path
The first optical fiber collimator of process 9 be incident to the Amici prism 10, after be incident to the eye cornea center after, the reflection of former road
To 2 × 2 fiber coupler 8；And the Amici prism 10 is coaxial with the optical imaging system.The reference path passes through
After being incident to the speculum 12 after second optical fiber collimator 11, former road reflexes to the fiber coupler 8；The reflection
Mirror 12 is installed on the one-dimensional movement platform 13, and the one-dimensional movement platform 13 is installed on the grating scale 14.
The speculum 12 is mounted on the one-dimensional movement platform 13, and the one-dimensional movement platform 13 is in the grating scale 14
Upper linear motion.
When the photodetector 15 detects the optical path and the reference path in the fiber coupler 8
When interfering, processor records the light path value on the grating scale 14, and the light path value is the eye cornea center to institute
State the distance between round LED lamp group 2.
It should be noted that photodetector 15 acquire photoelectric information carry out processing processor can with described in processing
The processor of 4 the image collected information of imaging sensor is same processor, or different processors.When processing light
When the processor of power information and the processor of processing image information are same processor, the processor may include image procossing
Unit, data processing unit and information process unit.The processor 5 is believed according to 4 the image collected of described image sensor
Breath and 15 collected signal message of photodetector, control the three-dimensional mobile platform, full-automatic to realize
Measure eye cornea curvature.
The keratometry module is specifically used for the enlargement ratio according to the optical imagery object lens 3 and the people
Cornea vertex measures the corneal curvature of the human eye to be detected to the distance of the round LED lamp group 2.It needs to illustrate
Be calculate corneal curvature processor can with processing 4 the image collected information of described image sensor processor be same
One processor, or different processors.
After completing the keratometry of a human eye of the user to be detected, the processor controls the three-dimensional
Mobile platform moves pre-determined distance to the direction of another human eye, in order to measure the corneal curvature of another human eye；It can incite somebody to action
The distance of the three-dimensional mobile platform movement is set as 60mm.
In the present embodiment, the round LED lamp group irradiates the face of user to be detected, and the light is by described to be checked
After surveying the face reflection of user, the optical imagery object lens are incident to, the use to be detected is acquired using described image sensor
The facial image information at family, and the facial image information is transmitted to the processor, the processor is according to the face
Image information controls the three-dimensional mobile platform and is moved, and Automatic-searching human eye is automatically aligned to human eye center and automatic coke
Away from, to obtain the user to be detected eye cornea central sharp picture；Obtain the eye cornea of the user to be detected
After the target image at center, using broad band laser source emissioning light fibre, optical fiber is divided into one by 2 × 2 fiber coupler
Road optical path and all the way reference path.The first optical fiber collimator of process of the optical path is incident to the Amici prism,
After be incident to the eye cornea center after, former road reflexes to 2 × 2 fiber coupler.When the photodetector detects
When being interfered in the fiber coupler to the optical path and the reference path, processor records the grating scale
On light path value, the light path value is described eye cornea center the distance between to the round LED lamp group.
In the present embodiment, directly measured using low coherence interference between the human eye center and round LED lamp group away from
From, using broad band laser light source, ensure that institute's ranging from precision meet measurement standard.And very due to the depth of field of optical system
Greatly, object distance variation is insensitive, can ensure that measurement error in the coherence length of broad band laser light source, improves when measuring every time
Signal-to-noise ratio when measurement.
And in the present embodiment, optical imaging system uses doubly telecentric light path design in the target image acquisition device, protects
The magnifying power of optical imagery object lens is set to be kept constant in certain object distance variation range while having demonstrate,proved the big depth of field, the energy when measuring
What is be more prone to gets a distinct image, error when reducing measurement caused by the weak vibrations of human eye；And doubly telecentric optics
System imaging is clear, and distortion is very small so that the result of image procossing is more accurate in entire measuring system, further improves
The accuracy of measurement result.The present embodiment uses a kind of human eye location algorithm based on SVM and Hough loop truss, and by the two
In conjunction with and a kind of algorithm based on image procossing clarity, control respectively measuring instrument with respect to human eye around with
And upper and lower movement, the corneal curvature that full-automatic non-contact measures eyes is realized, operator is due to right when eliminating measurement
The reduction of measurement efficiency and measurement accuracy caused by accurate and focusing difficulty.
Therefore present embodiments provide it is a kind of with high certainty of measurement, measuring speed is fast, signal-to-noise ratio is high, noncontacting measurement
Digital full-automatic keratometry device.
Referring to FIG. 5, Fig. 5 is a kind of flow of the method for digitlization keratometry provided in an embodiment of the present invention
Figure；Specific steps may include：
Step S501：Obtain the target image of the corneal center of human eye to be detected；
Step S502：When the optical path and reference path of fiber coupler transmitting interfere, the human eye is obtained
Corneal center extremely measures the distance between reference substance；
Step S503：According to the distance between described eye cornea center to the reference substance and preset rules, institute is calculated
State the corneal curvature of human eye to be detected.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with it is other
The difference of embodiment, just to refer each other for same or similar part between each embodiment.For side disclosed in embodiment
For method, since it is corresponding with pretending disclosed in embodiment, so description is fairly simple, related place is said referring to device part
It is bright.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The device and method of digitlization keratometry provided by the present invention are described in detail above.This
Specific case is applied in text, and principle and implementation of the present invention are described, the explanation of above example is only intended to
It facilitates the understanding of the method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, can be with several improvements and modifications are made to the present invention, these improvement and modification are also fallen
Enter in the protection domain of the claims in the present invention.
Claims (10)
1. a kind of device of digitlization keratometry, which is characterized in that including：Target image acquisition device, coherent interference
Range unit, keratometry module；
The target image device is used to obtain the target image at the eye cornea center of user to be detected；
When the optical path and reference path that the coherent interference range unit is used to emit in fiber coupler interfere, obtain
It obtains the eye cornea center and extremely measures the distance between reference substance；
The keratometry module be used for according to the distance between described eye cornea center to the measurements reference substance with
Preset rules calculate the eye cornea curvature of the user to be detected.
2. device as described in claim 1, which is characterized in that the target image acquisition device includes：Round LED lamp group,
Optical imagery object lens, imaging sensor, processor；
Wherein, the human eye of user to be detected, the round LED lamp group, the optical imagery object lens and described image sensor position
In in same optical axis；
The round LED lamp group is used to irradiate the face of user to be detected, in order to which the light of round LED lamp group transmitting is logical
Cross the user to be detected face reflex to the optical imagery object lens after be incident to described image sensor；
The processor is used at the facial image information of the user to be detected collected to described image sensor
Reason, in order to the target figure at the eye cornea center of the mobile acquisition user to be detected by controlling three-dimensional mobile platform
Picture.
3. device as claimed in claim 2, which is characterized in that the processor is specifically used for：
After described image sensor collects the facial image information of the user to be detected, human eye algorithm is identified using SVM
Moving up and down and moving left and right for the three-dimensional mobile platform is controlled, and identifies that pupil of human algorithm waits for described in obtaining by SVM
The accurate position for detecting human eye, in order to obtain the eye image of the user to be detected；
After the eye image for obtaining the user to be detected, positions and identify using hough loop truss pupil of human CENTER ALGORITHMs
The human eye center of the user to be detected, in order to obtain the oculocentric image of people of the user to be detected；
After the oculocentric image of people for obtaining the user to be detected, the three-dimensional mobile platform is controlled using auto-focusing algorithm
Back-and-forth motion, in order to obtain the user to be detected eye cornea center target image.
4. device as claimed in claim 3, which is characterized in that the relevant range unit includes：
Laser light source, fiber coupler, the first optical fiber collimator, Amici prism, the second optical fiber collimator, speculum, one-dimensional shifting
Moving platform, grating scale, photodetector；
The light that the laser light source is sent out is divided into optical path and reference path, the measurement after the fiber coupler
Light path is incident to the Amici prism by the first optical fiber collimator, after be incident to the eye cornea center after, reflex to institute
State fiber coupler；And the optical path keeps coaxial with the optical imagery object lens；
After the reference path after second optical fiber collimator by being incident to the speculum, the fiber coupling is reflexed to
Device；
The speculum is installed on the one-dimensional movement platform, and the one-dimensional movement stage+module is on the grating scale；
When the photodetector detects that the optical path and the reference path occur to do in the fiber coupler
When relating to, the light path value on the grating scale is recorded using the processor, the light path value is the eye cornea center to institute
State the distance between round LED lamp group.
5. device as claimed in claim 4, which is characterized in that the keratometry module is specifically used for according to the light
The enlargement ratio of image-forming objective lens and the eye cornea vertex measure described to be checked to the distance of the round LED lamp group
The corneal curvature of the human eye of survey.
6. device as claimed in claim 5, which is characterized in that the processor is additionally operable to；Complete the user's to be detected
After the keratometry of one human eye, controls the three-dimensional mobile platform and moves pre-determined distance to the direction of another human eye,
In order to measure the corneal curvature of another human eye.
7. a kind of method of digitlization keratometry, which is characterized in that including
Obtain the target image of the corneal center of human eye to be detected；
When the optical path and reference path of fiber coupler transmitting interfere, the eye cornea center is obtained to measurement
The distance between reference substance；
According to the distance between described eye cornea center to the reference substance and preset rules, the human eye to be detected is calculated
Corneal curvature.
8. the method for claim 7, which is characterized in that the target image of the corneal center for obtaining human eye to be detected
Including：
The face that user to be detected is irradiated using round LED lamp group, in order to which the light of round LED lamp group transmitting passes through institute
State user to be detected face reflex to optical imagery object lens after be incident to imaging sensor；
It is handled using the facial image information of the processor user to be detected collected to described image sensor, with
Convenient for the target image at the eye cornea center of the mobile acquisition user to be detected by controlling three-dimensional mobile platform.
9. method as claimed in claim 8, which is characterized in that described collected to described image sensor using processor
The facial image information of the user to be detected carries out processing：
After described image sensor collects the facial image information of the user to be detected, human eye algorithm is identified using SVM
Moving up and down and moving left and right for the three-dimensional mobile platform is controlled, and identifies that pupil of human algorithm waits for described in obtaining by SVM
The accurate position for detecting human eye, in order to obtain the eye image of the user to be detected；
After the eye image for obtaining the user to be detected, positions and identify using hough loop truss pupil of human CENTER ALGORITHMs
The human eye center of the user to be detected, in order to obtain the oculocentric image of people of the user to be detected；
After the oculocentric image of people for obtaining the user to be detected, the three-dimensional mobile platform is controlled using auto-focusing algorithm
Back-and-forth motion, in order to obtain the user to be detected eye cornea center target image.
10. the method as described in claim 1, which is characterized in that described according to the eye cornea center to the reference substance
The distance between and preset rules, the corneal curvature for calculating the human eye to be detected include：
According to the enlargement ratio of the optical imagery object lens and the eye cornea vertex to the round LED lamp group away from
From the eye cornea curvature of the measurement user to be detected.
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