CN110123262A - Ophthalmic measurement system and method - Google Patents
Ophthalmic measurement system and method Download PDFInfo
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- 238000005259 measurement Methods 0.000 title claims abstract description 29
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- 238000003384 imaging method Methods 0.000 claims description 47
- 210000004087 cornea Anatomy 0.000 claims description 37
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- 210000001508 eye Anatomy 0.000 abstract description 138
- 238000010276 construction Methods 0.000 abstract description 3
- 210000000695 crystalline len Anatomy 0.000 description 63
- 238000012014 optical coherence tomography Methods 0.000 description 58
- 238000005516 engineering process Methods 0.000 description 19
- 210000001525 retina Anatomy 0.000 description 9
- 230000010287 polarization Effects 0.000 description 7
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- 206010025421 Macule Diseases 0.000 description 5
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- 210000002159 anterior chamber Anatomy 0.000 description 3
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- 238000004364 calculation method Methods 0.000 description 2
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- 208000002177 Cataract Diseases 0.000 description 1
- 210000001742 aqueous humor Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/102—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for optical coherence tomography [OCT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
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Abstract
A kind of ophthalmic measurement system and method, for detecting tested eye, the ophthalmic measurement system includes switched scan element, anterior ocular segment optical path component, oculi posterior segment optical path component, beam splitter and main body module, can be realized by switched scan element and switch and can be scanned to tested eye anterior ocular segment and oculi posterior segment between optical path section optical path component before eyes and oculi posterior segment optical path component.The present invention provides another achievable switchings scanned to tested eye anterior ocular segment and oculi posterior segment to determine the long technical solution of tested eye axis oculi, while can also overcome prior art construction complexity, disadvantage with high costs.
Description
Technical field
The invention belongs to eye examination apparatus field more particularly to a kind of ophthalmic measurement system and method.
Background technique
Cataract operation, cornea refractive surgery and adolescent myopia effectively prevent the multiple parameters required to eyes
Precise measurement is carried out, as cornea front and rear surfaces curvature, corneal thickness, anterior chamber depth, lens thickness, crystalline lens front and rear surfaces are bent
Rate, axis oculi be long, white to white distance, pupil diameter etc..In the prior art, for obtaining, the multiple parameter is most widely used to be
Ultrasonic technology, but its measurement accuracy is low.
The shortcomings that for ultrasonic technology, be developed based on OCT (Optical Coherence Tomography,
Optical coherent chromatographic imaging) technology ophthalmic measurement system, for obtaining the multiple parameter.OCT is a kind of emerging optics
Imaging technique has many advantages, such as fast high resolution, image taking speed, radiationless damage, compact-sized, is basic medical research and to face
The important potential tool of bed diagnostic application.OCT technology can be divided into TDOCT (Time Domain OCT, time domain OCT) and FDOCT
(Frequency Domain OCT, frequency domain OCT), FDOCT can be further divided into SSOCT (Swept Source OCT, frequency sweep again
Source OCT) and SDOCT (Spectral Domain OCT, spectral coverage OCT).Ophthalmic measurement system is based on time domain OCT technology or base
It is all relatively easy to realize in Sweep Source OCT technology, realizes that difficulty is larger based on spectral-domain OCT techniques.
Application No. is 200710020707.9 Chinese patent application disclose it is a kind of long using time domain OCT measurement axis oculi
Method, the length of a length of corneal vertex of axis oculi to macula retinae central fovea.This method is moved forward and backward using stepper motor
Probe, to realize the adjusting of light path, so that cornea and eyeground be imaged, this method has the following deficiencies: 1) stepper motor
It is longer to be moved forward and backward the imaging time needed, can not real time imagery, and measurand will shake during imaging, blink, because
There are large errors for the parameters such as the axis oculi length that this measurement obtains；2) this method can not carry out transversal scanning to eyes, cannot judge
The position of corneal vertex and central fovea of macula, therefore the axis oculi length that measurement obtains differs larger with practical axis oculi length；3) cornea with
Have the organs such as cornea, aqueous humor, crystalline lens between retina, the light for entering eyes reflected, this method can not in cornea and
Retina realizes the focusing of measurement light simultaneously, and image quality is poor.
It puts it bluntly, the ophthalmic measurement system based on time domain OCT technology is with image taking speed is slow, measurement accuracy is low, image matter
The disadvantages of amount difference, the defect of ultrasonic technology is not overcome in fact.Although and the ophthalmic measurement system based on Sweep Source OCT technology
The shortcomings of ultrasonic technology are overcome, but its is at high price, it is difficult to universal.
System and method are disclosed for the Chinese patent of Publication No. CN103892791A, it can be achieved that at the moment to tested eye
The switching of section and oculi posterior segment scanning is to determine that tested eye axis oculi is long based on spectral-domain OCT techniques.But it uses multiple switching mechanisms, needs
Multiple switching mechanisms are wanted to cooperate the switching that just can be achieved to scan to tested eye anterior ocular segment and oculi posterior segment between each other, structure is complicated,
It is not convenient for safeguarding；It is with high costs, it is difficult to universal.
Summary of the invention
Based on OCT technology, the present invention provides a kind of ophthalmic measurement system, belongs to another can be achieved to tested eye anterior ocular segment
Switching with oculi posterior segment scanning can also be overcome existing with determining the long technical solution of tested eye axis oculi based on spectral-domain OCT techniques
Have the shortcomings that technical pattern is complicated, with high costs.
Technical solution provided in an embodiment of the present invention is as follows:
A kind of ophthalmic measurement system, after detecting tested eye, including switched scan element, anterior ocular segment optical path component, eye
Optical path component, beam splitter and main body module are saved,
The beam splitter is disposed in proximity to one end of the tested eye, the eye for scattering the tested eye anterior ocular segment
Prosthomere signal light is divided into the first anterior ocular segment signal light and the second anterior ocular segment signal light, or for scattering the tested eye oculi posterior segment
Oculi posterior segment signal light be divided into the first oculi posterior segment signal light and the second oculi posterior segment signal light；
The anterior ocular segment optical path component and the oculi posterior segment optical path component are set to the beam splitter and the switching is swept
Retouch between element, the anterior ocular segment optical path component for transmitting the first anterior ocular segment signal light to the switched scan element,
The oculi posterior segment optical path component is for transmitting the second oculi posterior segment signal light to the switched scan element；
The switched scan element is set to the other end relative to the beam splitter, has the first working position and second
Working position can simultaneously switch between first working position and second working position, and the switched scan element is in described
It can be rotated in one working position, the switched scan element, which is in second working position, to be rotated,
The switched scan element is in first working position, for the first anterior ocular segment signal light to be transferred to institute
Main body module is stated, the switched scan element is rotated in first working position to realize to the anterior ocular segment of the tested eye
Scanning,
The switched scan element is in second working position, for the second oculi posterior segment signal light to be transferred to institute
Main body module is stated, the switched scan element is rotated in second working position to realize to the oculi posterior segment of the tested eye
Scanning；
The main body module is for interfering the first anterior ocular segment signal light and the second oculi posterior segment signal light
And acquire corresponding interference light.
The embodiment of the present invention also provides a kind of ophthalmic measurement method, for detecting tested eye, comprising:
When switching to anterior ocular segment imaging, the tested eye is irradiated using incident light, it will be described tested using beam splitter
The anterior ocular segment signal light that eye anterior ocular segment scatters the incident light and formed is divided into the first anterior ocular segment signal light and the second anterior ocular segment letter
Number light, and the first anterior ocular segment signal light is made to enter anterior ocular segment optical path component, the rotational angle of switched scan element is controlled, is made
The switched scan element is in the first working position and rotates in first working position, to the anterior ocular segment of the tested eye into
Row scans and receives a series of first anterior ocular segment signal lights；
When switching to oculi posterior segment imaging, the tested eye is irradiated using incident light, it will be described tested using beam splitter
The oculi posterior segment signal light that eye oculi posterior segment scatters the incident light and formed is divided into the first oculi posterior segment signal light and the second oculi posterior segment letter
Number light, and the second oculi posterior segment signal light is made to enter oculi posterior segment optical path component, the rotational angle of switched scan element is controlled, is made
The switched scan element is in the second working position and rotates in second working position, to the oculi posterior segment of the tested eye into
Row scans and receives a series of second oculi posterior segment signal lights；
The anterior ocular segment OCT image that the tested eye is generated according to a series of first anterior ocular segment signal lights, according to described
The oculi posterior segment OCT image of eye is detected described in a series of second oculi posterior segment signal photogenerateds, and according to the first anterior ocular segment signal
The axis oculi that eye is detected described in light and the second oculi posterior segment signal optical oomputing is long；
It is long that the axis oculi is checked according to the anterior ocular segment OCT image and the oculi posterior segment OCT image.
Ophthalmic measurement system and method provided in an embodiment of the present invention, by controlling switched scan element rotational angle, with
It is switched fast the anterior ocular segment imaging or oculi posterior segment imaging to the tested eye, and by calculating anterior ocular segment imaging and oculi posterior segment imaging
Optical path difference, obtain the relevant parameter of the tested eye；And the switched scan element also has scanning function, may be implemented pair
The anterior ocular segment of tested eye and the scanning of oculi posterior segment.Compared with the existing technology, the present invention provides another kinds can be achieved to tested eye
The switching of anterior ocular segment and oculi posterior segment scanning is detected the long technical solution of eye axis oculi to determine based on spectral-domain OCT techniques, while can also
Overcome prior art construction complexity, disadvantage with high costs.
Detailed description of the invention
Fig. 1 is the module diagram of ophthalmic measurement system provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of ophthalmic measurement system in Fig. 1.
Fig. 3 is the operation principle schematic diagram of switched scan element in Fig. 2.
Fig. 4 (a) to Fig. 4 (b) is the time cooperation figure of switched scan element and detector in Fig. 2.
Fig. 5 is the distribution schematic diagram of headlamp in lighting source in Fig. 2.
It is as follows that meaning is marked in figure:
Main body module 100
Light source 101
Coupler 103
Detector 105
Reference arm assembly 130
Reference arm lens 131
Reference arm reflecting mirror 133
Polarization Controller 107
Focusing lens 109
Controller 111
Switched scan element 30
First working position 30a
Second working position 30b
Anterior ocular segment optical path component 50
First relay lens 51
Total reflection mirror 53
Second relay lens 55
Oculi posterior segment optical path component 70
Light path adjusts unit 71
First reflecting mirror 71a
Second reflecting mirror 71c
Third reflecting mirror 71e
4th reflecting mirror 71g
Diopter accommodation element 73
Beam splitter 90
Connect mesh object lens 13
Fixation optical module 300
Fixation light source 301
Fixation lens 303
Anterior ocular segment photographing module 500
Lighting source 501
Headlamp 501a
Spectroscope 502
First expands view lens 503
5th reflecting mirror 505
Second expands view lens 507
First imaging lens system 509
Second imaging lens system 511
Image pick-up device 513
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of ophthalmic measurement system (hereinafter referred to as " system "), for detecting tested eye E, from
And determine the multiple parameters of tested eye E, it is axis oculi length of such as tested eye E, corneal curvature, camera oculi anterior depth, white to white distance, pupil
The parameters such as diameter.System is based on OCT technology, and as one of its multiple technical effect, system can realize that spectral-domain OCT techniques are applied to
It is long to measure tested eye axis oculi, but system obviously applies also for time domain OCT technology and Sweep Source OCT technology.
Below only with based on spectral-domain OCT techniques for example, those of ordinary skill in the art are without creative work
Under the premise of can also be transformed, obtain the scheme based on time domain OCT technology and Sweep Source OCT technology.
It please join Fig. 1 and Fig. 2, after system includes main body module 100, switched scan element 30, anterior ocular segment optical path component 50, eye
It saves optical path component 70, beam splitter 90 and connects mesh object lens 13.Figure chain lines illustrate optical path, and the main body module 100 generates
Reference light simultaneously provides incident light, rotational angle of the incident light according to switched scan element 30, transmitting to switched scan element 30
Extremely the anterior ocular segment optical path component 50 or the oculi posterior segment optical path component 70, and after the beam splitter 90 reflects or transmits
Signal light is formed through the corresponding site for connecing mesh object lens 13 and focusing to the tested eye E, then after the tested eye E scattering,
The signal light is propagated back to the main body module 100 along the direction opposite with the incident light and does with described generate with reference to the interference of light
Light is related to, the main body module 100 also acquires the interference light.
It is detailed in Fig. 2, in an embodiment of the present invention, the main body module 100 includes light source 101, coupler 103, reference
Arm component 130, detector 105, Polarization Controller 107, focusing lens 109 and controller 111.The reference arm assembly 130 into
One step includes reference arm lens 131 and reference arm reflecting mirror 133.The light source 101 can be OCT light source, and it is close for issuing wavelength
The weak coherent light of infrared waves is simultaneously transferred to the coupler 103, and the light received is divided into two beams by the coupler 103, wherein
It is a branch of to be returned in the coupler 103 after the reference arm lens 131 focusing and the reference arm reflecting mirror 133 reflection, with
As reference light.Another Shu Ze is successively transferred to switching after the Polarization Controller 107 and the focusing lens 109 are focused and sweeps
Element 30 is retouched as incident light.
Please be with ginseng Fig. 3, in an embodiment of the present invention, switched scan element 30 has the first working position 30a and the second work
Make position 30b and can switch between the first working position 30a and the second working position 30b.Figure chain lines illustrate optical path,
It can be allowed to select the direction of propagation of the incident light in different rotational angles by controlling the switched scan element 30,
So that the incident light is transferred to the anterior ocular segment optical path component 50 or the oculi posterior segment optical path component 70.Specifically, controllable
The switched scan element 30 switches between the first working position 30a and the second working position 30b, when the switching is swept
It retouches element 30 and is in the first working position 30a, incident light is transferred to the anterior ocular segment optical path component 50；When the switched scan
Element 30 is in the second working position 30b, and incident light is transferred to the oculi posterior segment optical path component 70.
Specifically, in an embodiment of the present invention, the system also includes Electronic Control Unit (such as motor), the electronics
Control assembly has automatically controlled runing rest (such as shaft), and the Electronic Control Unit and the controller 111 are electrically connected, described
Switched scan element 30 is fixed on the automatically controlled runing rest, and the controller 111 is by controlling the Electronic Control Unit
Rotation to drive the rotation of the automatically controlled runing rest, to control the rotational angle of the switched scan element 30, when described
When switched scan element 30 turns to the first working position 30a, by the reflection of generation incident light to the anterior ocular segment optical path component 50,
When the switched scan element 30 turns to the second working position, by the reflection of generation incident light to the oculi posterior segment optical path component
70。
It is appreciated that in other embodiments of the invention, the system can also be by manually adjusting control switched scan
30 rotational angle of element, specifically, the system comprises the runing rest for fixing switched scan element 30, the rotation branch
Frame provides knob, by can be manually rotated the knob adjust 30 angle of rotation of switched scan element with by the incident light beam strikes into institute
State the corresponding position of tested eye E.
It is appreciated that in other embodiments of the invention, switched scan element 30 can also by other mechanical equipments or
Person's electrical method carries out angle rotation control, meets the scheme of this design structure all within protection scope of the present invention, this
Place repeats no more.
In an embodiment of the present invention, incident light is through the anterior ocular segment optical path component 50 or the oculi posterior segment optical path component 70
After reach the beam splitter 90, the beam splitter 90 is specially a semi-transparent semi-reflecting lens, anterior ocular segment optical path group described in transmissive
The incident light that part 50 transmits reflects the incident light that the oculi posterior segment optical path component 70 is transmitted.Specifically, in the embodiment of the present invention
In, when the switched scan element 30 is in the first working position 30a, incident light penetrates the beam splitter 90, and passes through
Connect the anterior ocular segment that mesh object lens 13 focus to the tested eye E, such as the cornea position of the tested eye E.When switched scan element
30 when being in the second working position 30b, and incident light is reflected by the beam splitter 90, and connect mesh object lens 13 focus to it is described tested
The oculi posterior segment of eye E, such as the retina position of the tested eye E.
It should be noted that in an embodiment of the present invention, the anterior ocular segment optical path component 50 includes total reflection mirror 53, when
When the switched scan element 30 is in the first working position 30a, the total reflection mirror 53 is by the switched scan element 30
The light of transmitting reflexes to the beam splitter 90.
It should be noted that in an embodiment of the present invention, the anterior ocular segment optical path component 50 further includes at least one
After lens, wherein at least one relay lens between the switched scan element 30 and the total reflection mirror 53, at this point,
When the switched scan element 30 turns to the first working position 30a, incident light is emitted to institute through the relay lens
State total reflection mirror 53；Or at least one relay lens between the total reflection mirror 53 and the beam splitter 90, at this point, by
The reflection of generation incident light is irradiated on the beam splitter 90 by the total reflection mirror 53 through the relay lens.
Preferably, in an embodiment of the present invention, the anterior ocular segment optical path component 50 includes two relay lens, i.e., first
Relay lens 51 and the second relay lens 55, wherein first relay lens 51 is swept in the total reflection mirror 53 and the switching
It retouches between element 30, second relay lens 55 is between the total reflection mirror 53 and the beam splitter 90.At this point, described
When switched scan element 30 is in the first working position 30a, incident light is emitted to institute through first relay lens 51
Total reflection mirror 53 is stated, is irradiated to the beam splitter after the second relay lens 55 as described in 53 reflectance-transmittance of total reflection mirror
90。
In an embodiment of the present invention, the beam splitter 90 receives the incidence from the anterior ocular segment optical path component 50
Light, the incident light penetrate the beam splitter 90, and the anterior ocular segment of the tested eye E is focused to through connecing mesh object lens 13, such as institute
State the cornea of tested eye E.The anterior ocular segment scatters the incident light, generates anterior ocular segment signal light, the anterior ocular segment signal light
The beam splitter 90 is irradiated to by the mesh object lens 13 that connect.The anterior ocular segment signal light divides by the beam splitter 90
First anterior ocular segment signal light and the second anterior ocular segment signal light, the second anterior ocular segment signal light are reflected into through the beam splitter 90
Enter oculi posterior segment optical path component 70, is no longer propagated back to the main body module 100；The first anterior ocular segment signal light edge and incident light
Opposite direction successively passes through beam splitter 90, anterior ocular segment optical path component 50, switched scan element 30 and is propagated back to the main body
Module 100, and interfered in the coupler 103 with the reference light, interference light is generated, the detector 105 receives
The controller 111 is transmitted to after the interference light and processing.Polarization direction due to the first anterior ocular segment signal light is being returned
It is controlled before to the coupler 103 by the Polarization Controller 107, ensure that the effect of interference.
It should be noted that in an embodiment of the present invention, the oculi posterior segment optical path component 70 includes that light path adjusts unit
71 and Diopter accommodation element 73, it includes fixed two reflecting mirrors, a movable mirror that the light path, which adjusts unit 71,
Group and a Bit andits control element (not shown), the movable mirror group is fixed on the Bit andits control element, described solid
Fixed two motionless reflecting mirrors are the first reflecting mirror 71a and the second reflecting mirror 71c, and the movable mirror group includes that third is anti-
Penetrate mirror 71e and the 4th reflecting mirror 71g.When the switched scan element 30 is in the second working position 30b, incident light is transmitted
To the light path adjust unit 71 in the first reflecting mirror 71a, and by the third reflecting mirror 71e, the 4th reflecting mirror 71g and
Second reflecting mirror 71c reflexes to the Diopter accommodation element 73, transmits after Diopter accommodation element 73 described in the incidence light transmission
The extremely beam splitter 90, and mesh object lens 13 are connect through 90 reflectance-transmittance of beam splitter, finally focus on the tested eye E's
Oculi posterior segment.
It should be noted that when surveying the oculi posterior segment of the tested eye E, since the axis oculi of different tested eye E is long different, because
It is necessary to one of them setting light paths in the anterior ocular segment optical path component 50 and the oculi posterior segment optical path component 70 to adjust unit for this,
Preferably, light path is set in the oculi posterior segment optical path component 70 and adjusts unit.In an embodiment of the present invention, the light path tune
Saving unit includes four reflecting mirrors, and wherein two reflecting mirror is fixed, in addition two removable, i.e. the first reflecting mirror 71a, the
Two-mirror 71c be it is fixed, third reflecting mirror 71e, the 4th reflecting mirror 71g are moveable, the third reflecting mirror
71e, the 4th reflecting mirror 71g are fixed on the Bit andits control element, only wherein two need to be kept anti-when realizing that light path is adjusted
It is motionless to penetrate mirror, that is, keeps the first reflecting mirror 71a, the second reflecting mirror 71c fixed, while passing through the Bit andits control member
Mobile other two reflecting mirrors of part, that is, move up and down the third reflecting mirror 71e, the 4th reflecting mirror 71g, be just able to achieve light path tune
Section.Displacement sensor is installed on the Bit andits control element, can be used to obtain the third reflecting mirror 71e and the described 4th instead
Penetrate the displacement of mirror 71g.Preferably, in order to match with fixation optical module provided in this embodiment, first reflecting mirror
71a, the second reflecting mirror 71c are shifted to install, and the second reflecting mirror 71c is a dichroscope, the first reflecting mirror 71a, institute
Stating third reflecting mirror 71e, the 4th reflecting mirror 71g is total reflection mirror.
It is appreciated that in other embodiments of the invention, the second reflecting mirror 71c and the third reflecting mirror 71e
Displacement can also be obtained by the calculating such as stepper motor, voice coil motor or grating scale, capacitive grating scale, and be not limited solely to
The mobile device mentioned or inductor are stated, as long as meeting the structure of this design all within protection scope of the present invention.
It is appreciated that the movable mirror group can also move reversed return for one in the other embodiment of the present invention
Emitter only needs to keep the first reflecting mirror 71a, the second reflecting mirror 71c motionless, while passing through shifting when realizing that light path is adjusted
Move it is described move reversed retroreflector, be just able to achieve light path adjusting.
In addition, when carrying out oculi posterior segment measurement the incident light can be adjusted described by the Diopter accommodation element 73
The position of tested eye E inner focusing, the view of tested eye E as described in can be focused light at by the mobile Diopter accommodation element 73
Film, to realize for the measurement with myopia or the tested eye E of long sight.Specifically, the Diopter accommodation element 73 is fixed on
In one translating device (not shown), its movement can be controlled, manually or electrically to realize Diopter accommodation.
In an embodiment of the present invention, after incident light focuses to the oculi posterior segment of the tested eye E, the oculi posterior segment scatters institute
Incident light is stated, and generates oculi posterior segment signal light, mesh object lens 13 is connect described in the oculi posterior segment signal light process and is irradiated to the light splitting
Element 90.The oculi posterior segment signal light divides by the beam splitter 90 for the first oculi posterior segment signal light and the second oculi posterior segment signal
Light, the first oculi posterior segment signal light are transmitted into the anterior ocular segment optical path component 50 through the beam splitter 90, no longer propagate
Return to the main body module 100；The second oculi posterior segment signal light edge and incident light phase after the beam splitter 90 reflection
Anti- direction is successively propagated back to the main body module 100 through the oculi posterior segment optical path component 70, switched scan element 30, and
Interfered in the coupler 103 with the reference light, generate interference light, the detector 105 receives the interference light simultaneously
The controller 111 is transmitted to after processing.Polarization direction due to the second oculi posterior segment signal light is returning to the coupler
It is controlled before 103 by the Polarization Controller 107, ensure that the effect of interference.The controller 111 by it is described at the moment
The optical path difference of section imaging and oculi posterior segment imaging, so that it may obtain the corresponding parameter of the tested eye E.
It should be noted that in an embodiment of the present invention, switched scan element 30 is in addition to that can carry out the quick of optical path
Switching is outer, can also be scanned imaging to the tested eye E.The switched scan element 30 is in the first working position 30a
Interior to rotate to realize the scanning to the tested eye E anterior ocular segment, the switched scan element 30 is in second work
It can be rotated in the 30b of position to realize the scanning to the tested eye E oculi posterior segment.
Please be with ginseng Fig. 4 (a) to Fig. 4 (b), switched scan element 30 is started turning from initial position position 1, t1For scanning institute
State tested eye E anterior ocular segment or oculi posterior segment needed for the working time, t2It is imaged and switches from anterior ocular segment for switched scan element 30
To time needed for oculi posterior segment imaging, t3It is returned to complete the switched scan element 30 after the oculi posterior segment scanning to tested eye E
Time needed for initial position position 1." sweeping anterior ocular segment position " i.e. described switched scan element 30, which is in the first working position 30a, to be made
Obtain position when incident light focuses on the anterior ocular segment of the tested eye E." sweeping oculi posterior segment position " i.e. described switched scan element 30
It is in position when the second working position 30b makes incident light focus on the oculi posterior segment of the tested eye E.
When anterior segment image to be acquired, switched scan element 30 rotates in the first working position 30a, while detector
105 synchronize start acquire signal.When by t1Time, the switched scan element 30 are in position 2.The detector 105 is adopted
After having collected anterior segment image, the switched scan element 30 switches to the second working position 30b, is t the time required to this process2, institute
State 30 in-position 3 of switched scan element.
Then start to acquire oculi posterior segment image, switched scan element 30 rotates in the second working position 30b, while detector
105 synchronize start acquire signal.When by t1Time, the switched scan element 30 are in position 4.The detector 105 is adopted
After having collected oculi posterior segment image, the switched scan element 30 is rotated backward to return to initial position position 1, the time required to this process
For t3, the switched scan element 30 returns to initial position position 1.
It should be noted that in an embodiment of the present invention, the state change of switched scan element 30 and detector 105 and
The time control of timing is realized by the controller 111.
In an embodiment of the present invention, system further includes fixation optical module 300, and fixation optical module 300 includes fixation
Light source 301 and fixation lens 303.The light that fixation light source 301 issues is visible light, and fixation light source 301 is specially a display screen, is shown
Show that the fixation mark for being detected eye E fixation, display screen can be LCD screen, OLED screen or LED array screen etc..
In the oculi posterior segment optical path component 70, the first reflecting mirror 71a, the second reflecting mirror 71c are shifted to install, of the invention
In embodiment, the second reflecting mirror 71c is a dichroscope.Specifically, the second reflecting mirror 71c can pass through fixation light source
The light of 301 outputs, and reflect the incident light transmitted from switched scan element 30.
The light that the fixation light source 301 issues is through the fixation lens 303 and the second reflecting mirror 71c transmission and through institute
State Diopter accommodation element 73 adjust bend after, reflected through beam splitter 90, then the oculi posterior segment of tested eye E is focused on through connecing mesh object lens 13,
Such as the retina of tested eye E.
Specifically, fixation mark can be used in embodiments of the present invention to change the fixation position of the tested eye E, it is described
Fixation mark can move up and down, and detect tested eye different location with this to meet.The light that fixation light source 301 issues can pass through
The Diopter accommodation element 73 adjusts diopter, if the light that fixation light source 301 issues cannot adjust in the wrong, the tested eye E of different eyesights
When observation, fixation target readability is different, this makes to feel uncomfortable when tested eye fixation, it is therefore preferred that the fixation light
The optical path that source 301 issues can focus on eye ground after the Diopter accommodation element 73 is adjusted and bent, and tested eye is enable to see
Clear fixation mark.
In order to realize that different tested eye E can see clear fixation mark in present invention implementation, pass through the Diopter accommodation element
73 introduce tune in fixation optical module 300 bends mechanism, realizes the effect that can be seen clearly for different tested eye E fixation marks
Fruit.If fixation optical module, i.e. two in the Diopter accommodation element 73 are added directly after the Diopter accommodation element 73
Fixation optical module is added in the other end for adjusting unit 71 relative to the light path in end, then will affect light when oculi posterior segment imaging
Road.If such as adjusted in the Diopter accommodation element 73 and the light path and fixation optical module be added between unit 71, need
A piece of spectroscope is additionally introduced, the light that fixation light source issues is reflected into Diopter accommodation element 73 through the spectroscope, and this design is led
Cause incident light, signal light that need to transmit the spectroscope, off-energy reduces signal-to-noise ratio；In another example if being adjusted in the light path single
Fixation optical module is added between member 71 and the switched scan element 30, then not only needs to add new spectroscope, also causes institute
Fixation mark is stated to move together with four reflecting mirrors in light path adjusting unit 71.And the embodiment of the present invention is by making the light
The first reflecting mirror 71a, the second reflecting mirror 71c that journey is adjusted in unit 70 are shifted to install, and the second reflecting mirror 71c is arranged
For a dichroscope, the light that fixation light source 301 exports can pass through, reflect the incident light transmitted from switched scan element 30, both may be used
To realize the tested clear fixation fixation mark of eye E, and optical path when oculi posterior segment imaging is not influenced.
It should be noted that system provided in an embodiment of the present invention further includes anterior ocular segment photographing module 500, for shooting really
It is the corneal center curvature of fixed tested eye E, pupil diameter, white to image needed for the parameters such as white distance, such as the iris of tested eye E
Picture.The anterior ocular segment photographing module 500 is electrical connected with the controller 111, comprising: lighting source 501, expands spectroscope 502
Depending on lens group, the 5th reflecting mirror 505, imaging lens system group and image pick-up device 513.Specifically, the lighting source 501 is set to and connects mesh
Between object lens 13 and the tested eye E, the lighting source 501 issues near infrared light.The spectroscope 502 is a dichroic
Mirror, the light that the light and fixation light source 301 that the light and reflection source 101 that transmissive lighting source 501 exports export export.
The illumination that the lighting source 501 issues is mapped to the anterior ocular segment of the tested eye E, by shape after anterior ocular segment reflection
At reflected light, a portion light is detected the corneal reflection of eye E, and a part of light is entered tested eye E through cornea, and by quilt
Examine the tissue diffusing reflection such as eye eye E anterior chamber.
In embodiments of the present invention, described to expand depending on lens group for making the reflected light convergence, including the first expansion view lens
503 and second expand view lens 507；The imaging lens system group is used to that the reflected light to be made to be imaged on the image pick-up device, including the
One imaging lens system 509 and the second imaging lens system 511.
The reflected light is transferred to the 5th reflection depending on lens 503 by connecing mesh object lens 13, spectroscope 502 and the first expansion
Mirror 505 expands view lens 507 and first imaging lens system 509, institute through described in 505 reflectance-transmittance of the 5th reflecting mirror second
The second imaging lens system 511 is stated, the image pick-up device is focused on by first imaging lens system 509, second imaging lens system 511
513 form the picture of the tested eye anterior ocular segment, and the controller 111 acquires the picture of the tested eye anterior ocular segment.
It should be noted that avoiding being close to brought constriction with system, connecing mesh to allow detected person to feel comfortable
Object lens 13 are arranged with respect to system extension, therefore, it is larger to connect the distance between mesh object lens 13 and image pick-up device 513.And in order to true
To parameters such as white distances, the anterior ocular segment photographing module needs to have biggish areas imaging ding white ware, this with connect mesh object lens 13 before
It is contradictory for stretching.The purpose for expanding view lens group is set and is to solve the contradiction, described first expands and regard lens 503 and described the
Two, which expand view lens 507, can be changed by the light of corneal reflection and by the irreflexive optical propagation direction of anterior chamber, make its convergence, finally in institute
It states and is formed as large range of picture on image pick-up device 513.
It please join Fig. 5, in an embodiment of the present invention, the lighting source 501 includes multiple headlamp 501a, multiple illuminations
Lamp 501a circular array is uniformly distributed, when system is in keratometry operating condition, ring composed by each headlamp 501a
The geometric center of shape is directed at tested eye E pupil center.Specifically, headlamp 501a is LED light, quantity is more than or equal to 4, preferably
, in an embodiment of the present invention, the quantity of headlamp 501a is 6.
When system is in keratometry operating condition, the illumination that 6 headlamp 501a are issued is mapped to the cornea of tested eye E
On, it is finally detected by the image pick-up device 513 by the light of the corneal reflection, reflection by the camera oculi anterior photographing module 500,
And distribution image of 6 headlamp 501a on the cornea is formed on the image pick-up device 513.In an embodiment of the present invention,
The distribution image and the picture of the tested eye anterior ocular segment are formed together.
The controller 111 acquires the picture that 6 headlamp 501a are distributed on the cornea, using being mounted in it
The algorithm process picture, obtain the corneal curvature of tested eye E, in an embodiment of the present invention, the controller 111 is detected
The corneal center curvature of eye E.
Anterior ocular segment photographing module described in the embodiment of the present invention 500 is also equipped with monitoring optical path to instruct operator's operation instrument
The function of the relevant information of device and understanding measured, system are arranged on a station in a manner of it can move relative to station,
A lower jaw support system is provided on station, tester fixes tested eye E using lower jaw support system, makes from fixation optical mode
After fixation mark fixation in block 300 is in the tested eye E, tester passes through the display screen for observing the controller 111 on one side,
The movement of lower jaw support system and ophthalmic measurement system is controlled by operating stick on one side, so that the anterior ocular segment of the tested eye E, such as
Iris enters in the image pick-up device 513 of the anterior ocular segment photographing module 500, and iris picture is presented on the aobvious of the controller 111
In display screen, instrument is operated so as to guide doctor and understands the relevant information of the tested eye E.
In conclusion ophthalmic measurement system provided in an embodiment of the present invention, by controlling 30 angle of rotation of switched scan element
Degree, to be switched fast to the imaging of the anterior ocular segment of the tested eye E or oculi posterior segment imaging, and by calculating anterior ocular segment imaging and eye after
The optical path difference of imaging is saved, the relevant parameter of the tested eye E is obtained；And the switched scan element 30 also has scanning function,
The scanning of the anterior ocular segment and oculi posterior segment to tested eye E may be implemented.Compared with the existing technology, the present invention provides another kinds can be real
The long technical side of eye axis oculi now is detected to determine based on spectral-domain OCT techniques to the switching that tested eye anterior ocular segment and oculi posterior segment scan
Case, while prior art construction complexity, disadvantage with high costs can also be overcome.
The embodiment of the present invention also provides a kind of ophthalmic measurement method, for detecting tested eye, which comprises
S101 irradiates the tested eye using incident light when switching to anterior ocular segment imaging, will be described using beam splitter
The anterior ocular segment signal light that tested eye anterior ocular segment scatters the incident light and formed is divided into the first anterior ocular segment signal light and second at the moment
Signal light is saved, and the first anterior ocular segment signal light is made to enter anterior ocular segment optical path component, controls the angle of rotation of switched scan element
Degree, makes the switched scan element be in the first working position and rotate in first working position, to the eye of the tested eye
Prosthomere is scanned and receives a series of first anterior ocular segment signal lights；
Specifically, can control the rotation of the switched scan element by computer when switching to anterior ocular segment imaging, make
It is in the first working position, and rotates in first working position.
First anterior ocular segment signal light enters anterior ocular segment optical path component, so that the computer can receive by anterior ocular segment optical path
Component is transferred to the first anterior ocular segment signal light of the switched scan element.
When switching to anterior ocular segment imaging, whether computer can first detect current in the switching acquisition timing of deutomerite at the moment
In anterior ocular segment switch the period, when detecting that the anterior ocular segment in the switching acquisition timing of deutomerite at the moment switches the period, calculate
Machine can control the switched scan element rotation so that the switched scan element is in the first working position.Hereafter, the meter
Calculation machine can also continue to detect whether that the anterior segment image in the switching acquisition timing of deutomerite at the moment acquired in the period, work as detection
When acquiring the period to the anterior segment image in the switching acquisition timing of deutomerite at the moment, the switched scan element scan quilt is controlled
The anterior ocular segment of eye is examined, to receive a series of first anterior ocular segment signal lights transmitted by anterior ocular segment optical path component, i.e., in the eye
All processes in S101 step can be executed in prosthomere switching period and anterior segment image acquisition period.Wherein, described
The duration of anterior ocular segment switching period can be preset, and the duration of the anterior segment image acquisition period can be previously according to described
Switched scan element is configured the scanning duration of the anterior ocular segment of tested eye.
S102 irradiates the tested eye using incident light when switching to oculi posterior segment imaging, will be described using beam splitter
Tested eye oculi posterior segment scatters the incident light and after the oculi posterior segment signal light that is formed is divided into the first oculi posterior segment signal light and second
Signal light is saved, and the second oculi posterior segment signal light is made to enter oculi posterior segment optical path component, controls the angle of rotation of switched scan element
Degree, makes the switched scan element be in the second working position and rotate in second working position, to the eye of the tested eye
Deutomerite is scanned and receives a series of second oculi posterior segment signal lights；
Specifically, can control the rotation of the switched scan element by computer when switching to oculi posterior segment imaging, make
It is in the second working position, and rotates in second working position.
Second oculi posterior segment signal light enters oculi posterior segment optical path component, so that the computer can receive by oculi posterior segment optical path
Component is transferred to the second oculi posterior segment signal light of the switched scan element.
When switching to oculi posterior segment imaging, whether computer can first detect current in the switching acquisition timing of deutomerite at the moment
In oculi posterior segment switch the period, when detecting that the oculi posterior segment in the switching acquisition timing of deutomerite at the moment switches the period, calculate
Machine can control the switched scan element rotation so that the switched scan element is in the second working position.Hereafter, the meter
Calculation machine can also continue to detect whether to acquire in the switching of deutomerite at the moment in the oculi posterior segment Image Acquisition period in timing, work as detection
To when acquiring the oculi posterior segment Image Acquisition period in timing in the switching of deutomerite at the moment, the switched scan element scan quilt is controlled
The oculi posterior segment of eye is examined, to receive a series of second oculi posterior segment signal lights transmitted by oculi posterior segment optical path component, i.e., in the eye
All processes in S102 step can be executed in deutomerite switching period and the oculi posterior segment Image Acquisition period.Wherein, described
The duration of oculi posterior segment switching period can be preset, and the duration of the oculi posterior segment Image Acquisition period can be previously according to described
Switched scan element is configured the scanning duration of the oculi posterior segment of tested eye.
S103 generates the anterior ocular segment OCT image of the tested eye according to a series of first anterior ocular segment signal lights, according to
The oculi posterior segment OCT image of eye is detected described in a series of second oculi posterior segment signal photogenerateds, and according to first anterior ocular segment
The axis oculi that eye is detected described in signal light and the second oculi posterior segment signal optical oomputing is long；
Specifically, computer can generate the anterior ocular segment of the tested eye according to a series of first anterior ocular segment signal lights
OCT image is detected the oculi posterior segment OCT image of eye according to a series of second oculi posterior segment signal photogenerateds, and according to institute
The axis oculi for stating tested eye described in the first anterior ocular segment signal light and the second oculi posterior segment signal optical oomputing is long.Wherein, it is receiving
When the first anterior ocular segment signal light, the first anterior ocular segment signal light can be interfered with the First view after being interfered
Prosthomere signal light；When receiving the second oculi posterior segment signal light, the second oculi posterior segment signal light can be interfered
With the second oculi posterior segment signal light after being interfered, at this point, the computer specifically can be according to a series of first after interference
Anterior ocular segment signal light obtains the anterior ocular segment OCT image of the tested eye, can be believed according to a series of second oculi posterior segments after interference
Number light obtains the oculi posterior segment OCT image of the tested eye, and can be according to the first anterior ocular segment signal light and second described
The axis oculi that eye is detected described in deutomerite signal optical oomputing is long.
It is long to check the axis oculi according to the anterior ocular segment OCT image and the oculi posterior segment OCT image by S104；
Specifically, computer can check the axis oculi according to the anterior ocular segment OCT image and the oculi posterior segment OCT image
It is long.Computer may determine that the anterior ocular segment OCT image with the presence or absence of center column, if existing in the anterior ocular segment OCT image
Center column, then the anterior ocular segment OCT image includes corneal vertex；Whether computer may determine that the oculi posterior segment OCT image
There are center columns, if there are center columns in the oculi posterior segment OCT image, the oculi posterior segment OCT image includes in macula lutea
The heart is recessed.The center column is during being scanned by incident light to tested eye, due to by the corneal vertex of the tested eye
It is formed with central fovea of macula strong reflection.If the anterior ocular segment OCT image includes corneal vertex, and the oculi posterior segment OCT schemes
As including central fovea of macula, it is determined that the long practical axis oculi appearance with the tested eye of the axis oculi that computer is calculated
Symbol.
Wherein, S103 is detected according to the first anterior ocular segment signal light and the second oculi posterior segment signal optical oomputing
The axis oculi length of eye can specifically include following steps:
S103a obtains anterior segment image according to by the first anterior ocular segment signal light anterior segment image generated after interfering
The light path of top cornea signal into anterior segment image；
S103b obtains oculi posterior segment image according to by the second oculi posterior segment signal light oculi posterior segment image generated after interfering
The light path of top retina signal into oculi posterior segment image；
S103c, according to the anterior segment image top into anterior segment image the light path of cornea signal, the oculi posterior segment figure
As top into oculi posterior segment image the light path of retina signal, light path regulated quantity, the intrinsic light path of anterior ocular segment optical path and oculi posterior segment
The intrinsic light path of optical path calculates axiallength；
Specifically, anterior segment image top light path of cornea signal into anterior segment image is specifically as follows anterior ocular segment
Distance of the corneal vertex to image apex, the light of oculi posterior segment image apex retina signal into oculi posterior segment image in image
Journey is specifically as follows in oculi posterior segment image image apex to the distance of central fovea of macula.The computer can according to it is described at the moment
Save image apex light path of cornea signal, oculi posterior segment image apex retina into oculi posterior segment image into anterior segment image
Light path, light path regulated quantity, the intrinsic light path of anterior ocular segment optical path and the intrinsic light path of oculi posterior segment optical path of signal calculate axiallength,
Wherein, the light path regulated quantity is the change in optical path length amount generated when adjusting oculi posterior segment image imaging.
The axis oculi is long are as follows: the intrinsic light path of the anterior ocular segment optical path-intrinsic light path of oculi posterior segment optical path+light path regulated quantity+oculi posterior segment
The light path of image apex retina signal into oculi posterior segment image-anterior segment image top cornea signal into anterior segment image
Light path.
Wherein, the difference of the intrinsic light path of anterior ocular segment optical path and the intrinsic light path of oculi posterior segment optical path consolidating for deutomerite at the moment
Determine optical path difference, distance corresponding to the fixation optical path difference of the deutomerite at the moment can be obtained by calibrating measurement.
In an embodiment of the present invention, the ophthalmic measurement method further include:
S105 obtains the initial cornea curvature distribution of the tested eye according to the anterior ocular segment OCT image；
Specifically, the anterior ocular segment to the tested eye be scanned including, multi-thread scanning is carried out to the anterior ocular segment,
Such as six line scannings or the scanning of ten two wires are carried out to the anterior ocular segment.Six line refers to, is in symmetrical with the corneal vertex
The heart is centrosymmetric six lines of distribution；It is described that anterior ocular segment progress six lines scanning is referred to, described in six line scanning
Anterior ocular segment, to obtain six OCT images of the anterior ocular segment.
Correction and refraction correction are scanned to six OCT images, it may be determined that the curvature distribution of the cornea to get
To initial cornea curvature distribution.
S106 is irradiated the cornea of the tested eye using the light that equally distributed multiple headlamps annular in shape issue, obtained
Distribution image of the multiple headlamp on the cornea；
Specifically, being detected the angle of eye described in the illumination issued using equally distributed multiple headlamps annular in shape
Film makes illumination light described in the corneal reflection to generate reflected light；The reflected light is received using an image pick-up device, is formed described more
Distribution image of a headlamp on the cornea；
And distance of the multiple headlamp to the cornea, S109, root are determined according to the first anterior ocular segment signal light
The corneal center curvature of the tested eye is obtained according to the distance of the distribution image and the multiple headlamp to the cornea.
S107 checks the initial cornea curvature distribution according to the corneal center curvature, with the cornea after being checked
Curvature distribution.
Specifically, six OCT images of the anterior ocular segment determine each point on cornea after being scanned correction and refraction correction
Curvature distribution, due to needing to be scanned two step of correction and refraction correction, thus on identified cornea each point curvature distribution
There are large errors.So being corrected using the corneal center curvature to the curvature distribution of each point on cornea, to obtain
The curvature distribution of each point is on more accurate cornea to get the corneal curvature distribution to after checking.
The embodiment of the present invention can be switched fast to the tested eye at the moment by the rotation of control switched scan element
Section imaging or oculi posterior segment imaging, to be collected into anterior ocular segment signal light and oculi posterior segment signal light respectively, and pass through anterior ocular segment signal light
It is long with oculi posterior segment signal optical oomputing axis oculi；And the tested eye can be scanned, by scanning the tested eye obtained at the moment
OCT image and oculi posterior segment OCT image are saved, to correct the axis oculi using the anterior ocular segment OCT image and oculi posterior segment OCT image
It is long.The long method of another measurement axis oculi is provided compared with the existing technology, and is had and overcome lacking for prior art operation complexity
Point.
Claims (10)
1. a kind of ophthalmic measurement system, for detecting tested eye, which is characterized in that including switched scan element, anterior ocular segment optical path
Component, oculi posterior segment optical path component, beam splitter and main body module,
The beam splitter is disposed in proximity to one end of the tested eye, the anterior ocular segment for scattering the tested eye anterior ocular segment
Signal light is divided into the first anterior ocular segment signal light and the second anterior ocular segment signal light, or the eye for scattering the tested eye oculi posterior segment
Deutomerite signal light is divided into the first oculi posterior segment signal light and the second oculi posterior segment signal light；
The anterior ocular segment optical path component and the oculi posterior segment optical path component are set to the beam splitter and switched scan member
Between part, the anterior ocular segment optical path component is used to transmit the first anterior ocular segment signal light to the switched scan element, described
Oculi posterior segment optical path component is for transmitting the second oculi posterior segment signal light to the switched scan element；
The switched scan element is set to the other end relative to the beam splitter, has the first working position and the second work
Position can simultaneously switch between first working position and second working position, and the switched scan element is in first work
To make to rotate in position, the switched scan element, which is in second working position, to be rotated,
The switched scan element is in first working position, for the first anterior ocular segment signal light to be transferred to the master
Module, the switched scan element are rotated in first working position to realize sweeping to the anterior ocular segment of the tested eye
It retouches,
The switched scan element is in second working position, for the second oculi posterior segment signal light to be transferred to the master
Module, the switched scan element are rotated in second working position to realize sweeping to the oculi posterior segment of the tested eye
It retouches；
The main body module is for being interfered and being adopted to the first anterior ocular segment signal light and the second oculi posterior segment signal light
Collect corresponding interference light.
2. the system as claimed in claim 1, which is characterized in that the main body module includes light source, coupler and reference arm group
Part, the coupler receive the light that the light source issues and provide light to the reference arm assembly and the switched scan element,
The light received is reflected back the coupler to form reference light by the reference arm assembly.
3. system as claimed in claim 2, which is characterized in that the main body module further includes detector and controller, described
Detector and controller electric connection, the first anterior ocular segment signal light or the second oculi posterior segment signal light and the ginseng
It examines light and interference light is interfered and formed in the coupler, the interference light is after the detector receives and processes by institute
State controller acquisition.
4. the system as claimed in claim 1, which is characterized in that further include one connecing mesh object lens, the oculi posterior segment optical path component packet
It includes a light path and adjusts unit and a Diopter accommodation element, when carrying out oculi posterior segment imaging to the tested eye, control the switching
The rotational angle of scanning element, so that the switched scan element is in second working position, the switched scan element is mentioned
The incident light of confession successively adjusts unit through the light path and the Diopter accommodation element reaches the beam splitter, and through described point
Optical element reflection and the oculi posterior segment for connecing mesh object lens and focusing to the tested eye, to generate the oculi posterior segment signal light, from institute
State the second oculi posterior segment signal light for being separated in oculi posterior segment signal light be back to along the optical path opposite with the incident light it is described
Main body module.
5. system as claimed in claim 4, which is characterized in that it further include fixation optical module, the fixation optical module packet
A fixation light source is included, the light path adjusts unit and includes a reflecting mirror, a dichroscope and a movable mirror group, described anti-
It penetrates mirror and the dichroscope is fixed, the mobile movable mirror group is to adjust light in the oculi posterior segment optical path component
Interior light path, the reflecting mirror and the dichroscope shift to install, and the dichroscope can reflect the light of the light source output
And the light of fixation light source output described in transmissive, the light of the fixation light source output is successively through the dichroscope and the dioptric
Regulating element reaches the beam splitter, and reflects through the beam splitter and the mesh object lens that connect focus to the tested eye
Oculi posterior segment.
6. the system as claimed in claim 1, which is characterized in that further include anterior ocular segment photographing module, the main body module includes
One controller, the anterior ocular segment photographing module and the controller are electrically connected, and the anterior ocular segment photographing module includes illumination light
Source and image pick-up device, the light that the lighting source issues are formed reflected light, the reflected light after the tested eye anterior ocular segment reflection
The picture of the tested eye anterior ocular segment, the controller acquisition are formed into the anterior ocular segment photographing module and on the image pick-up device
The picture of the tested eye anterior ocular segment.
7. system as claimed in claim 6, which is characterized in that the anterior ocular segment photographing module further include an expansion view lens group and
One imaging lens system group, it is described expand view lens group and the imaging lens system group be set to the lighting source and the image pick-up device it
Between, described to expand depending on lens group for restraining the reflected light, the imaging lens system group is for taking the photograph the reflected light described
As being imaged on device, the reflected light is after the expansion regards lens group and the imaging lens system group on the image pick-up device described in formation
The picture of tested eye anterior ocular segment.
8. system as claimed in claim 6, which is characterized in that the lighting source includes multiple headlamps, the multiple photograph
Bright lamp circular array is uniformly distributed, and the illumination that the multiple headlamp issues is mapped to the cornea of the tested eye, and described
Corneal reflection forms the reflected light, and the reflected light enters the anterior ocular segment photographing module and formed in the image pick-up device described
Distribution image of the headlamp on the cornea, the controller acquires the distribution image, and utilizes installation inside the controller
Algorithm obtain the corneal curvature of the tested eye.
9. a kind of ophthalmic measurement method, for detecting tested eye characterized by comprising
When switching to anterior ocular segment imaging, the tested eye is irradiated using incident light, using beam splitter by the tested eye eye
The anterior ocular segment signal light that prosthomere scatters the incident light and formed is divided into the first anterior ocular segment signal light and the second anterior ocular segment signal light,
And the first anterior ocular segment signal light is made to enter anterior ocular segment optical path component, the rotational angle of switched scan element is controlled, is made described
Switched scan element is in the first working position and rotates in first working position, sweeps to the anterior ocular segment of the tested eye
It retouches and receives a series of first anterior ocular segment signal lights；
When switching to oculi posterior segment imaging, the tested eye is irradiated using incident light, using beam splitter by the tested eye eye
The oculi posterior segment signal light that deutomerite scatters the incident light and formed is divided into the first oculi posterior segment signal light and the second oculi posterior segment signal light,
And the second oculi posterior segment signal light is made to enter oculi posterior segment optical path component, the rotational angle of switched scan element is controlled, is made described
Switched scan element is in the second working position and rotates in second working position, sweeps to the oculi posterior segment of the tested eye
It retouches and receives a series of second oculi posterior segment signal lights；
The anterior ocular segment OCT image that the tested eye is generated according to a series of first anterior ocular segment signal lights, according to a system
The oculi posterior segment OCT image of eye is detected described in column the second oculi posterior segment signal photogenerated, and according to the first anterior ocular segment signal light and
The axis oculi that eye is detected described in the second oculi posterior segment signal optical oomputing is long；
It is long that the axis oculi is checked according to the anterior ocular segment OCT image and the oculi posterior segment OCT image.
10. method as claimed in claim 9, which is characterized in that further include:
The initial cornea curvature distribution of the tested eye is obtained according to the anterior ocular segment OCT image；
The cornea that the tested eye is irradiated using the light that equally distributed multiple headlamps annular in shape issue, obtains the multiple photograph
Distribution image of the bright lamp on the cornea obtains the corneal center curvature of the tested eye according to the distribution image；
The initial cornea curvature distribution is checked according to the corneal center curvature, is distributed with the corneal curvature after being checked.
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| Publication number | Priority date | Publication date | Assignee | Title |
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