CN106725285B - Optical coherence human eye measuring device and human eye measurement method - Google Patents
Optical coherence human eye measuring device and human eye measurement method Download PDFInfo
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- CN106725285B CN106725285B CN201710010356.7A CN201710010356A CN106725285B CN 106725285 B CN106725285 B CN 106725285B CN 201710010356 A CN201710010356 A CN 201710010356A CN 106725285 B CN106725285 B CN 106725285B
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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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- 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
- A61B3/1005—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring distances inside the eye, e.g. thickness of the cornea
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- A—HUMAN NECESSITIES
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- 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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- A61B3/117—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
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- A—HUMAN NECESSITIES
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- 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
- A61B3/117—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
- A61B3/1173—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes for examining the eye lens
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Abstract
The invention discloses a kind of optical coherence human eye measuring device and human eye measurement methods, are related to human eye measuring device and method and technology field.Described device includes low-coherent light interference unit, fast zoom unit, refer to arm unit more, photoelectricity trigger unit, servo motor, turntable and computer, low-coherent light interference unit passes through the second optical fiber and fast zoom unit light connects, low-coherent light interference unit passes through third optical fiber and more reference arm unit light connects, computer is electrically connected with low-coherent light interference unit and photoelectricity trigger unit respectively by the first signal wire and second signal line, the two-way light of low-coherent light interference unit output respectively enters fast zoom unit and mostly with reference to arm unit, servo motor drives turntable rotation, zoom and optical path switching are carried out to the light of low-coherent light interference unit output.Described device can accurately measure human eye's visual axis relevant parameter, including corneal thickness, anterior chamber depth, lens thickness and glass body thickness.
Description
Technical field
The present invention relates to human eye measuring device and method and technology field more particularly to a kind of optical coherence human eye measuring devices
And human eye measurement method.
Background technique
Cataract is common one of blinding ophthalmology disease, and patient's initial stage blurred vision, the later period is because of crystalline lens change
Muddy and gradually loss of sight.Now without the drug of radical cure cataract, the only effective method is by surgical removal muddiness
Crystalline lens and implantable artificial crystalline lens, whether the diopter of intraocular lens properly have decision to the recovery extent of Postoperative visual acuity
Effect, and intraocular lens' diopter is determined by eyes optical axis parameter, such as: corneal thickness, anterior chamber depth, optic axis length etc..This
Class operation requires the preoperative optical axis relevant parameter to patient accurately to be measured, such patient could obtain after surgery one compared with
For ideal dioptric effect, and then get rid of many puzzlements caused by cataract lives to it.Thus, for that will carry out in white
For the patient for hindering operation, can postoperative to obtain ideal dioptric effect, can key be join its optical axis correlation in the preoperative
Number is accurately measured.
For optical axis parameter measurement, it is dry that Haag-Streit AG discloses a kind of time domain low-coherent light with double reference arms
Interferometer (referring to U.S. Patent Publication No. US2009/0268209 A1, entitled " Method and apparatus for
Determination of geometric values on an object ")；Karr Zeiss medical technology limited liability company
Disclose a kind of time domain low coherence interferometer (referring to Chinese Patent Application No. 200880118045.1, entitled " Low coherence
Interferometer "), which is used to measure the interval of sample multiple regions；Wang Yi etc. discloses a kind of using balance detection method
Time domain low-coherent light interferometer (referring to Chinese Patent Application No. 201210019447.4, entitled " optical coherence biometric
The method measured instrument and carry out ocular bioavailability measurement ").Detection for optical axis parameter, it is low that above-mentioned three kinds of methods are all based on time domain
Coherent light interference principle, itself sensitivity are relatively low；Also, because in the detection process of time domain low-coherent light interference technique
In, due to reference arm scanning to be carried out, cause to detect the optical path difference consecutive variations between light and reference light, that detects is dry
Spectral signal consecutive variations are related to, cannot achieve multiple averaging to improve noise when sensitivity；In addition, these methods, all do not have
The eyesight status for taking into account testee, is not carried out fast zoom, and in detection process, not can guarantee detection light can be successively
It focuses in intraocular each detection faces.Therefore, patient more serious for those phacoscotasmus degrees, detects the serious of light
Decaying will lead to be back to detector light it is too weak, cause its optical axis parameter not to be detected effectively, keep recall rate lower.Cause
This, needs a kind of optical axis measurement method of parameters and device with compared with high detection sensitivity.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of optical coherence human eye measuring device, described device can be quasi-
Really measure human eye's visual axis relevant parameter, including corneal thickness, anterior chamber depth, lens thickness and glass body thickness.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of optical coherence human eye measuring device,
It is characterized by comprising low-coherent light interference unit, fast zoom unit, mostly with reference to arm unit, photoelectricity trigger unit, servo electricity
Machine, turntable and computer, for low-coherent light interference unit by the second optical fiber and fast zoom unit light connects, low-coherent light is dry
Unit is related to by third optical fiber and more reference arm unit light connects, computer by the first signal wire and second signal line respectively with
Low-coherent light interference unit and the electrical connection of photoelectricity trigger unit, the two-way light of low-coherent light interference unit output respectively enter fastly
Fast zoom unit and refer to arm unit, servo motor drive turntable rotation, to low-coherent light interference unit output light carry out
Zoom and optical path switching.
A further technical solution lies in: the low-coherent light interference unit includes low-coherence light source, the first optical fiber, optical fiber
Coupler, the second optical fiber, third optical fiber, the 4th optical fiber, third optical fiber collimator, grating, the tenth lens, line array CCD and
One signal wire, the low-coherence light source connects by the first optical fiber with fiber coupler, fiber coupler pass through the second optical fiber and
The first optical fiber collimator connection in fast zoom unit, fiber coupler by third optical fiber with mostly with reference to the in arm unit
Two optical fiber collimators connection, fiber coupler by the 4th optical fiber successively sequentially with third optical fiber collimator, grating, the tenth thoroughly
Mirror, line array CCD, the first signal wire are made light, are electrically connected in series.
It include the first optical fiber collimator a further technical solution lies in: the fast zoom unit, first semi-transparent semi-reflecting
Mirror, the second semi-transparent semi-reflecting lens, the first reflecting mirror, the second reflecting mirror, the first lens, the second lens, the third lens, the 4th lens and
5th lens, the optical fiber collimator sequentially successively with the first semi-transparent semi-reflecting lens, the first lens, the second lens, the third lens,
First reflecting mirror, the second semi-transparent semi-reflecting lens and the 4th lens make light connects, constitute eyes prosthomere feeler arm；First optical fiber collimator
Sequentially successively make light connects with the second reflecting mirror, the 4th lens, the second semi-transparent semi-reflecting lens and the 4th lens, constitutes the spy of retina
Test arm.
A further technical solution lies in: described includes mostly that the second optical fiber collimator, third are semi-transparent semi-reflecting with reference to arm unit
Mirror, the 4th semi-transparent semi-reflecting lens, the 5th semi-transparent semi-reflecting lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens, third reflection
Mirror, the 4th reflecting mirror, the 5th reflecting mirror, the 6th reflecting mirror, the 7th reflecting mirror, the 8th reflecting mirror and the 9th reflecting mirror, the second light
Fine collimator sequentially successively makees light connects with third semi-transparent semi-reflecting lens, the 6th lens and third reflecting mirror, constitutes the ginseng of cornea
Examine arm；Second optical fiber collimator is sequentially successively with third semi-transparent semi-reflecting lens, the 4th reflecting mirror, the 4th semi-transparent semi-reflecting lens, and the 7th thoroughly
Mirror and the 5th reflecting mirror make light connects, constitute the reference arm of crystalline body front surface；Second optical fiber collimator sequentially successively with third
Semi-transparent semi-reflecting lens, the 4th reflecting mirror, the 4th semi-transparent semi-reflecting lens, the 6th reflecting mirror, the 5th semi-transparent semi-reflecting lens, the 8th lens and the 7th
Reflecting mirror makees light connects, constitutes the reference arm of crystalline lens rear surface；Second optical fiber collimator is sequentially successively semi-transparent semi-reflecting with third
Mirror, the 4th reflecting mirror, the 4th semi-transparent semi-reflecting lens, the 6th reflecting mirror, the 5th semi-transparent semi-reflecting lens, the 8th reflecting mirror, the 9th lens and
9th reflecting mirror makees light connects, constitutes the reference arm of retina.
It include infrared emission component and photoelectric trigger device a further technical solution lies in: the photoelectricity trigger unit,
The two is located at the two sides of turntable, and photoelectric trigger device is by second signal line and calculates mechatronics.
A further technical solution lies in: first to fourth exploration hole set gradually along the clockwise direction of the turntable
And first to fourth reference bore, first to fourth exploration hole and first to fourth reference bore are arcuate socket, described the
The degree of central angle corresponding to one to the 4th exploration hole and first to fourth reference bore is 45 °, and described first to third visits
The arc length of gaging hole is identical, and the arc length of the 4th exploration hole is greater than the arc length of first exploration hole；First to fourth reference bore
Arc length successively increase, be respectively arranged on the outside of first to fourth reference bore first to fourth photoelectricity triggering through-hole, institute
Photoelectricity triggering through-hole is stated as circle, and the distance between two photoelectricity triggering through-holes are identical；Second exploration hole and third
The first slide and the second slide are respectively provided on exploration hole.
Anterior surface of cornea interference spectrum signal is measured using optical coherence human eye measuring device the invention also discloses a kind of
Method, which is characterized in that the human eye measuring device be human eye measuring device above-mentioned, described method includes following steps:
The detection light for entering fast zoom unit through the first optical fiber collimator successively passes through the first semi-transparent semi-reflecting lens, first thoroughly
After the first detection through-hole on mirror, turntable, by the second lens, the third lens, the first reflecting mirror, the second semi-transparent semi-reflecting lens, the
It after five lens, focuses on the anterior surface of cornea of testee, the reflected light of the light of road detection later is by backtracking to second
In optical fiber；
Enter through the second optical fiber collimator and mostly passes through on turntable with reference to the reference light of arm unit through third semi-transparent semi-reflecting lens
After first reference bore, into the reference arm of cornea, converged on the 4th reflecting mirror through the 6th lens, the road reference light is anti-later
Light backtracking is penetrated into third optical fiber；
Reflected light in second optical fiber and third optical fiber is back to fiber coupler, and it is quasi- to enter third optical fiber through the 4th optical fiber
The light of straight device becomes directional light under its collimating effect, is then irradiated on grating, by, by the tenth lens, obtaining after grating beam splitting
To interference spectrum image in line-scan digital camera, be finally converted to electric signal through line-scan digital camera；At this point, red in photoelectricity trigger unit
The infrared light that outer emission element issues is just passed through the triggering through-hole of the first photoelectricity on turntable, and photoelectric trigger device starts work
Make and issues trigger signal；Trigger signal reaches computer through second signal line, and thus computer generates before starting acquisition
Electric signal, and then obtain the interference spectrum signal of anterior surface of cornea position and posterior surface of cornea position.
Crystalline body front surface interference spectrum letter is measured using optical coherence human eye measuring device the invention also discloses a kind of
Number method, which is characterized in that the human eye measuring device be human eye measuring device above-mentioned, the method includes walking as follows
It is rapid:
The detection light for entering fast zoom unit through optical fiber collimator successively passes through semi-transparent semi-reflecting lens, the first lens,
After the second through-hole on turntable and the first slide at this, through the second lens, the third lens, the first reflection
After mirror, the second semi-transparent semi-reflecting lens, the 5th lens, focus on the crystalline body front surface of testee, the light of road detection later
Reflected light is by backtracking into the second optical fiber；
Through the second optical fiber collimator enter mostly with reference to arm unit reference light through third semi-transparent semi-reflecting lens, the 4th reflecting mirror,
4th semi-transparent semi-reflecting lens, into the reference arm of crystalline body front surface, are converged after the second reference bore on turntable through the 7th lens
Gather on the 5th reflecting mirror, the reflected light backtracking of the road reference light is into third optical fiber later；
Reflected light in second optical fiber and third optical fiber is back to fiber coupler, and it is quasi- to enter third optical fiber through the 4th optical fiber
Straight device becomes directional light under its collimating effect, is then irradiated on grating, by after grating beam splitting by the tenth lens, thus
Obtained interference spectrum images in line-scan digital camera, is finally converted to electric signal through line-scan digital camera；At this point, in photoelectricity trigger unit
The infrared light that infrared emission component issues is just passed through the triggering through-hole of the second photoelectricity on turntable, and photoelectric trigger device starts
It works and issues trigger signal；Trigger signal reaches computer through second signal line, and thus computer starts to generate before acquisition
Electric signal, and then obtain the interference spectrum signal of crystalline body front surface.
Believed the invention also discloses a kind of using optical coherence human eye measuring device measurement crystalline lens rear surface interference spectrum
Number method, which is characterized in that the human eye measuring device be human eye measuring device above-mentioned, the method includes walking as follows
It is rapid:
The detection light for entering fast zoom unit through the first optical fiber collimator successively passes through the first semi-transparent semi-reflecting lens, first thoroughly
Mirror, after the third exploration hole and the second slide disposed thereon on turntable, through the second lens, the third lens, first
It after reflecting mirror, the second semi-transparent semi-reflecting lens, the 5th lens, focuses in the crystalline lens rear surface of testee, the road detects later
The reflected light of light is by backtracking into the second optical fiber；
Through the second optical fiber collimator enter mostly with reference to arm unit reference light through third semi-transparent semi-reflecting lens, the 4th reflecting mirror,
After 4th semi-transparent semi-reflecting lens, after the third reference bore on turntable, into the reference arm of crystalline body front surface, through the 7th lens
It converges on the 5th reflecting mirror, the reflected light backtracking of the road reference light is into third optical fiber later；
Reflected light in second optical fiber and third optical fiber is back to fiber coupler, and it is quasi- to enter third optical fiber through the 4th optical fiber
Straight device becomes directional light under its collimating effect, is then irradiated on grating, by after grating beam splitting by the tenth lens, thus
Obtained interference spectrum images in line-scan digital camera, is finally converted to electric signal through line-scan digital camera；At this point, in photoelectricity trigger unit
The infrared light that infrared emission component issues is just passed through the triggering through-hole of the third photoelectricity on turntable, and photoelectric trigger device starts
It works and issues trigger signal；Trigger signal reaches computer through second signal line, and thus computer starts to generate before acquisition
Electric signal, and then obtain the interference spectrum signal of crystalline lens rear surface.
The invention also discloses a kind of sides using optical coherence human eye measuring device measurement retina interference spectrum signal
Method, which is characterized in that the human eye measuring device is human eye measuring device above-mentioned, and described method includes following steps:
Detection light into fast zoom unit successively passes through the first semi-transparent semi-reflecting lens, the second reflecting mirror, passes through on turntable
The 4th reference bore after, after the 4th lens, the second semi-transparent semi-reflecting lens and the 5th lens, focus on the retina of testee
On, the reflected light of the light of road detection later is by backtracking into the second optical fiber；
Successively pass through third semi-transparent semi-reflecting lens, the 4th reflecting mirror, the 4th semi-transparent half into the reference light for more referring to arm unit
After anti-mirror, the 6th reflecting mirror, the 5th semi-transparent semi-reflecting lens, the 8th reflecting mirror, by the 4th reference bore on turntable, into retina
Reference arm, converged on the 9th reflecting mirror through the 9th lens, later the road reference light reflected light backtracking to third optical fiber
In；
Reflected light in second optical fiber and third optical fiber is back to fiber coupler, and it is quasi- to enter third optical fiber through the 4th optical fiber
Straight device becomes directional light under its collimating effect, is irradiated on grating, by, by the tenth lens, thus obtaining after grating beam splitting
Interference spectrum image in line-scan digital camera, be converted to electric signal through line-scan digital camera；At this point, the infrared emission in photoelectricity trigger unit
The infrared light that component issues is just passed through the triggering through-hole of the 4th photoelectricity on turntable, and photoelectric trigger device is started to work concurrent
Trigger signal out；Trigger signal reaches computer through second signal line, and thus computer starts the electric signal generated before acquisition,
And then obtain the interference spectrum signal of retinal location.
The beneficial effects of adopting the technical scheme are that described device in each detection position due to using
The data acquisition modes of triggering ensure that the validity of acquired data, and the more of each location conflicts spectral signal may be implemented
Secondary acquisition, it is average rear to improve signal-to-noise ratio to it；Described device can be realized fast zoom and quick optical path compensation simultaneously.
Described device does not influence the measurement of eyes prosthomere since the measurement of retina to be separately separated out, takes into account
The different eyesight status of patient；Due to detecting the interference spectrum signal of intraocular each position in such a way that detection light focuses,
Efficiently reduce the decaying of detection light: the two combines, and improves the recall rate of optical axis parameter to a certain extent, expands
The scope of application of device.
Described device is due to carrying out optical axis parameter based on frequency domain low-coherent light interference technique and by the way of segmentation
Detection, accurately realizes gamut of the human eye from anterior surface of cornea to retina and completely detects.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the structural schematic diagram of described device of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of described device turntable of the embodiment of the present invention；
Fig. 3 is opthalmic optics' illustraton of model that the embodiment of the present invention is established in ZEMAX；
Fig. 4 is emulation schematic diagram when the method for embodiment of the present invention detection light focuses on anterior surface of cornea；
Fig. 5 is emulation schematic diagram when the method for embodiment of the present invention detection light focuses on crystalline body front surface；
Fig. 6 is emulation schematic diagram when the method for embodiment of the present invention detection light focuses in crystalline lens rear surface；
Fig. 7 is emulation schematic diagram when the method for embodiment of the present invention detection light focuses on the retina；
Fig. 8 is the setting schematic diagram of photoelectricity trigger unit in described device of the embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Overall, as shown in Figure 1, the invention discloses a kind of optical coherence human eye measuring device, including low-coherent light is dry
Relate to unit A, fast zoom unit B, mostly with reference to arm unit C, photoelectricity trigger unit D, servo motor 41, turntable 42 and computer
37.Low-coherent light interference unit A is passed through by the second optical fiber 4 and fast zoom unit B light connects, low-coherent light interference unit A
Third optical fiber 15 with refer to arm unit C light connects.Computer 37 by the first signal wire 36 and second signal line 38 respectively with
Low-coherent light interference unit A and photoelectricity trigger unit D electrical connection.Low-coherent light interference unit A output two-way light respectively into
Enter fast zoom unit B and mostly with reference to arm unit C, servo motor 41 drives turntable 42 to rotate, defeated to low-coherent light interference unit A
Light out carries out zoom and optical path switching.
Specifically, as shown in Figure 1, the low-coherent light interference unit A includes low-coherence light source 1, the first optical fiber 2, optical fiber
Coupler 3, the second optical fiber 4, third optical fiber 15, the 4th optical fiber 31, third optical fiber collimator 32, grating 33, the tenth lens 34, line
Battle array CCD35 and the first signal wire 36.The low-coherence light source logical 1 is crossed the first optical fiber 2 and is connect with fiber coupler 3, optical fiber coupling
Clutch 3 is connect by the second optical fiber 4 with the first optical fiber collimator 5 in fast zoom unit B, and fiber coupler 3 passes through third
Optical fiber (15) with refer to arm unit C in the second optical fiber collimator 16 connect, fiber coupler 3 pass through the 4th optical fiber 31 successively
Sequentially make light, electrically coupled in series with third optical fiber collimator 32, grating 33, the tenth lens 34, line array CCD 35 and the first signal wire 36
Connection.
Specifically, as shown in Figure 1, the fast zoom unit B includes the first optical fiber collimator 5, the first semi-transparent semi-reflecting lens
6, the second semi-transparent semi-reflecting lens 13, the first reflecting mirror 10, the second reflecting mirror 11, the first lens 7, the second lens 8, the third lens 9,
Four lens 12 and the 5th lens 14.The optical fiber collimator 5 sequentially successively with the first semi-transparent semi-reflecting lens 6, the first lens 7,
Two lens 8, the third lens 9, the first reflecting mirror 10, the second semi-transparent semi-reflecting lens 13 and the 4th lens 14 make light connects, constitute eyes
Prosthomere feeler arm；First optical fiber collimator 5 sequentially successively with the second reflecting mirror 11, the 4th lens 12, the second semi-transparent semi-reflecting lens 13
Make light connects with the 4th lens 14, constitutes the feeler arm of retina 47.
Specifically, as shown in Figure 1, described includes mostly the second optical fiber collimator 16, third semi-transparent semi-reflecting lens with reference to arm unit C
17, the 4th semi-transparent semi-reflecting lens 21, the 5th semi-transparent semi-reflecting lens 25, the 6th lens 18, the 7th lens 22, the 8th lens the 26, the 9th are saturating
Mirror 29, third reflecting mirror 19, the 4th reflecting mirror 20, the 5th reflecting mirror 23, the 6th reflecting mirror 24, the 7th reflecting mirror the 27, the 8th are anti-
Penetrate mirror 28 and the 9th reflecting mirror 30.Second optical fiber collimator 16 sequentially successively with third semi-transparent semi-reflecting lens 17, the 6th lens 18 and
Third reflecting mirror 19 makees light connects, constitutes the reference arm of cornea 43；Second optical fiber collimator 16 is sequentially successively semi-transparent with third
Semi-reflective mirror 17, the 4th reflecting mirror 20, the 4th semi-transparent semi-reflecting lens 21, the 7th lens 22 and the 5th reflecting mirror 23 make light connects, constitute
The reference arm of crystalline body front surface 45；Second optical fiber collimator 16 sequentially successively with third semi-transparent semi-reflecting lens 17, the 4th reflecting mirror
20, the 4th semi-transparent semi-reflecting lens 21, the 6th reflecting mirror 24, the 5th semi-transparent semi-reflecting lens 25, the 8th lens 26 and the 7th reflecting mirror 27 are made
Light connects constitute the reference arm of crystalline lens rear surface 46；Second optical fiber collimator 16 sequentially successively with third semi-transparent semi-reflecting lens 17,
4th reflecting mirror 20, the 4th semi-transparent semi-reflecting lens 21, the 6th reflecting mirror 24, the 5th semi-transparent semi-reflecting lens 25, the 8th reflecting mirror 28, the 9th
Lens 29 and the 9th reflecting mirror 30 make light connects, constitute the reference arm of retina 47.
Specifically, as shown in Figure 1, the photoelectricity trigger unit D includes infrared emission component 40 and photoelectric trigger device 39,
The two is located at the two sides of turntable 42, and photoelectric trigger device 39 is electrically connected by second signal line 38 with computer 37, such as
Shown in Fig. 1 and Fig. 8.
Specifically, as shown in Fig. 2, along the turntable 42 the first to fourth exploration hole 2- that sets gradually of clockwise direction
1,2-2,2-3,2-4 and first to fourth reference bore 2-5,2-6,2-7,2-8.The first to fourth exploration hole 2-1,2-2,
2-3,2-4 and first to fourth reference bore 2-5,2-6,2-7,2-8 are arcuate socket, described first to fourth exploration hole 2-1,2-
2, the degree of central angle corresponding to 2-3,2-4 and first to fourth reference bore 2-5,2-6,2-7,2-8 is 45 °.Described
One to third exploration hole 2-1,2-2,2-3 arc length it is identical, the arc length of the 4th exploration hole 2-4 is greater than the first exploration hole 2-1
Arc length；The arc length of described first to fourth reference bore 2-5,2-6,2-7,2-8 successively increase, first to fourth reference bore
The triggering of first to fourth photoelectricity through-hole 2-9,2-10,2-11,2-12 are respectively arranged on the outside of 2-5,2-6,2-7,2-8, it is described
It is circle that photoelectricity, which triggers through-hole, and the distance between two photoelectricity triggering through-holes are identical；The second exploration hole 2-2 and third
The first slide a and the second slide b are respectively provided on exploration hole 2-3.
The specific ginseng of the first slide a at second exploration hole 2-2, third exploration hole 2-3 and the second slide b are set
Number (including refractive index and thickness) is to carry out selection by following process:
(1) opthalmic optics' model is established in optical simulation software ZEMAX, as shown in Figure 3.Set the first lens 7,
Two lens 8, the third lens 9, the parameter (including concrete model and relative position) of the 5th lens 14；
(2) when the first slide a sets design parameter, and be arranged in it is suitable between the first lens 7 and the second lens 8
When position, detection light is successively passing through the first lens 7, the second lens 8, the third lens 9, after the 5th lens 14, focus exactly on
On crystalline body front surface 45, as shown in Figure 5；
(3) when the second slide b sets design parameter, and be arranged in it is suitable between the first lens 7 and the second lens 8
When position, detection light is successively passing through the first lens 7, the second lens 8, the third lens 9, focus exactly on crystalline substance after the 5th lens 14
In shape body rear surface 46, as shown in Figure 6.
(4) when being not provided with slide between the first lens 7 and the second lens 8, detection light is successively passing through first thoroughly
Mirror 7, the second lens 8, the third lens 9, focus on anterior surface of cornea 43 that (44 be table after cornea in Fig. 3 after the 5th lens 14
Face), as shown in Figure 4；The position of the 4th lens 12 is suitably adjusted in experiment, detection light is successively passing through the 4th lens 12 and the 5th
It is able to focus on retina 47 after lens 14, as shown in Figure 7.
In experimentation, turntable 42 is under the drive of servo motor 41, to realize detection light position in each tested eye
Set be switched fast and fast zoom；Based on the design of turntable 42, there is interference spectrum signal in each tested intraocular location；?
Under the action of photoelectricity trigger module, the interference spectrum signal of each position of system acquisition.After interference spectrum signal processing, knot
Relevant parameter is closed, corneal thickness, anterior chamber depth, lens thickness, glass body thickness and optic axis length can be calculated.
Data acquisition modes of the described device due to using triggering in each detection position, ensure that acquired data
The multi collect of each location conflicts spectral signal may be implemented in validity, average rear to improve signal-to-noise ratio to it；Institute simultaneously
Stating device can be realized fast zoom and quick optical path compensation.
Described device does not influence the measurement of eyes prosthomere since the measurement of retina to be separately separated out, takes into account
The different eyesight status of patient；Due to detecting the interference spectrum signal of intraocular each position in such a way that detection light focuses,
Efficiently reduce the decaying of detection light: the two combines, and improves the recall rate of optical axis parameter to a certain extent, expands
The scope of application of device.
Described device is due to carrying out optical axis parameter based on frequency domain low-coherent light interference technique and by the way of segmentation
Detection, accurately realizes gamut of the human eye from anterior surface of cornea to retina and completely detects.
Correspondingly, measuring anterior surface of cornea interference light using optical coherence human eye measuring device the invention also discloses a kind of
The method of spectrum signal, the human eye measuring device are human eye measuring device above-mentioned, and described method includes following steps:
The detection light for entering fast zoom unit B through the first optical fiber collimator 5 successively passes through the first semi-transparent semi-reflecting lens 6, the
After the first detection through-hole 2-1 on one lens 7, turntable 42, by the second lens 8, the third lens 9, the first reflecting mirror 10, second
It after semi-transparent semi-reflecting lens 13, the 5th lens 14, focuses on the anterior surface of cornea 43 of testee, the reflection of the light of road detection later
Light is by backtracking into the second optical fiber 4；
Enter through the second optical fiber collimator 16 and mostly passes through turntable through third semi-transparent semi-reflecting lens 17 with reference to the reference light of arm unit C
On the first reference bore 2-5 after, into the reference arm of cornea, converged on the 4th reflecting mirror 19 through the 6th lens 18, later should
The reflected light backtracking of road reference light is into third optical fiber 15；
Reflected light in second optical fiber 4 and third optical fiber 15 is back to fiber coupler 3, enters third through the 4th optical fiber 31
The light of optical fiber collimator 32 becomes directional light under its collimating effect, is then irradiated on grating 33, passes through after being divided by grating 33
The tenth lens 34 are crossed, obtained interference spectrum images in line-scan digital camera 35, is finally converted to electric signal through line-scan digital camera 35；This
When, the infrared light that the infrared emission component 40 in photoelectricity trigger unit D issues is just passed through the first photoelectricity on turntable 42
Through-hole 2-9 is triggered, photoelectric trigger device 39 starts to work and issues trigger signal；Trigger signal reaches meter through second signal line 38
Calculation machine 37, thus computer 37 starts the electric signal generated before acquisition, and then obtains the interference light of 43 position of anterior surface of cornea
Spectrum signal.
Correspondingly, measuring crystalline body front surface interference using optical coherence human eye measuring device the invention also discloses a kind of
The method of spectral signal, the human eye measuring device are human eye measuring device above-mentioned, and described method includes following steps:
The detection light for entering fast zoom unit B through the first optical fiber collimator 5 successively passes through the first semi-transparent semi-reflecting lens 6, the
After one lens 7, the second exploration hole 2-2 on turntable 42 and the first slide a at this, through the second lens 8,
After three lens 9, the first reflecting mirror 10, the second semi-transparent semi-reflecting lens 13, the 5th lens 14, table before the crystalline lens of testee is focused on
On face 45, the reflected light of the light of road detection later is by backtracking into the second optical fiber 4；
It is anti-through third semi-transparent semi-reflecting lens the 17, the 4th to enter the reference light for more referring to arm unit C through the second optical fiber collimator 16
Mirror 20, the 4th semi-transparent semi-reflecting lens 21 are penetrated, after the second reference bore 2-6 on turntable 42, into the ginseng of crystalline body front surface 45
Arm is examined, is converged on the 5th reflecting mirror 23 through the 7th lens 22, later the reflected light backtracking of the road reference light to third light
In fibre 15；
Reflected light in second optical fiber 4 and third optical fiber 15 is back to fiber coupler 3, enters third through the 4th optical fiber 31
Optical fiber collimator 32, becomes directional light under its collimating effect, is then irradiated on grating 33, by the after being divided by grating 33
Ten lens 34, thus obtained interference spectrum image in line-scan digital camera 35, are finally converted to electric signal through line-scan digital camera 35；This
When, the infrared light that the infrared emission component 40 in photoelectricity trigger unit D issues is just passed through the second photoelectricity on turntable 42
Through-hole 2-10 is triggered, photoelectric trigger device 39 starts to work and issues trigger signal；Trigger signal is reached through second signal line 38
Computer 37, thus computer 37 starts the electric signal generated before acquisition, and then obtains the interference light of crystalline body front surface 45
Spectrum signal.
Correspondingly, being interfered the invention also discloses a kind of using optical coherence human eye measuring device measurement crystalline lens rear surface
The method of spectral signal, which is characterized in that the human eye measuring device is human eye measuring device above-mentioned, and the method includes such as
Lower step:
The detection light for entering fast zoom unit B through the first optical fiber collimator 5 successively passes through the first semi-transparent semi-reflecting lens 17, the
One lens 7, after the third exploration hole 2-3 and the second slide b disposed thereon on turntable 42, through the second lens 8,
After three lens 9, the first reflecting mirror 10, the second semi-transparent semi-reflecting lens 13, the 5th lens 14, table after the crystalline lens of testee is focused on
On face 46, the reflected light of the light of road detection later is by backtracking into the second optical fiber 4；
It is anti-through third semi-transparent semi-reflecting lens the 17, the 4th to enter the reference light for more referring to arm unit C through the second optical fiber collimator 16
After penetrating mirror 20, the 4th semi-transparent semi-reflecting lens 21, after the third reference bore 2-7 on turntable 42, into crystalline body front surface 45
Reference arm converges on the 5th reflecting mirror 23 through the 7th lens 22, later the reflected light backtracking of the road reference light to third
In optical fiber 15；
Reflected light in second optical fiber 4 and third optical fiber 15 is back to fiber coupler 3, enters third through the 4th optical fiber 31
Optical fiber collimator 32, becomes directional light under its collimating effect, is then irradiated on grating 33, by the after being divided by grating 33
Ten lens 34, thus obtained interference spectrum image in line-scan digital camera 35, are finally converted to electric signal through line-scan digital camera 35；This
When, the infrared light that the infrared emission component 40 in photoelectricity trigger unit D issues is just passed through the third photoelectricity on turntable 42
Through-hole 2-11 is triggered, photoelectric trigger device 39 starts to work and issues trigger signal；Trigger signal is reached through second signal line 38
Computer 37, thus computer 37 starts the electric signal generated before acquisition, and then obtains the interference light of crystalline lens rear surface 46
Spectrum signal.
Correspondingly, being believed the invention also discloses a kind of using optical coherence human eye measuring device measurement retina interference spectrum
Number method, which is characterized in that the human eye measuring device be human eye measuring device above-mentioned, the method includes walking as follows
It is rapid:
Detection light into fast zoom unit B successively passes through the first semi-transparent semi-reflecting lens 6, the second reflecting mirror 11, passes through and turns
After the 4th reference bore 2-4 on disk 42, after the 4th lens 12, the second semi-transparent semi-reflecting lens 13 and the 5th lens 14, focus on by
On the retina 47 of tester, the reflected light of the light of road detection later is by backtracking into the second optical fiber 4；
Successively pass through third semi-transparent semi-reflecting lens 17, the 4th reflecting mirror the 20, the 4th half into the reference light for more referring to arm unit C
After saturating semi-reflective mirror 21, the 6th reflecting mirror 24, the 5th semi-transparent semi-reflecting lens 25, the 8th reflecting mirror 28, pass through the 4th ginseng on turntable 42
Hole 2-8 is examined, into the reference arm of retina 47, is converged on the 9th reflecting mirror 30 through the 9th lens 29, later the road reference light
Reflected light backtracking is into third optical fiber 15；
Reflected light in second optical fiber 4 and third optical fiber 15 is back to fiber coupler 3, enters third through the 4th optical fiber 31
Optical fiber collimator 32 becomes directional light under its collimating effect, is irradiated on grating 33, after being divided by grating 33 thoroughly by the tenth
Mirror 34, thus obtained interference spectrum image in line-scan digital camera 35, are converted to electric signal through line-scan digital camera 35, at this point, photoelectricity touches
The infrared light that infrared emission component 40 in hair cells D issues is just passed through the triggering of the 4th photoelectricity on turntable 42 through-hole 2-
12, photoelectric trigger device 39 starts to work and issues trigger signal；Trigger signal reaches computer 37 through second signal line 38, by
This computer 37 starts the electric signal generated before acquisition, and then obtains the interference spectrum signal of 47 position of retina.
The interference information of each position in conjunction with measured by above-mentioned several method, calibration the distance between each reference arm and
The refractive index of intraocular each section physiological structure, eventually by calculating can be obtained corneal thickness, anterior chamber depth, lens thickness,
Glass body thickness and optic axis length.It is subsequent can by increase detection process in motor rotating cycle, to each detection
The interference spectrum signal of position carries out multi collect, to improve the signal-to-noise ratio of each interference spectrum signal；It is assisted in addition, also needing to increase
Human eye fixation device, avoid human eye in the detection process from automatically adjusting and influence the repeatability of testing result.
Claims (4)
1. a kind of method using optical coherence human eye measuring device measurement anterior surface of cornea interference spectrum signal, the measurement dress
It sets including low-coherent light interference unit (A), servo motor (41) and computer (37), the fast zoom based on rotary glass block
Unit (B), the more reference arm switch units (C) switched using turntable, cuts zoom and reference arm using photoelectricity trigger unit (D)
Change synchronization；Low-coherent light interference unit (A) passes through the second optical fiber (4) and fast zoom unit (B) light connects, low-coherent light interference
Unit (A) passes through the first signal wire by third optical fiber (15) and more reference arm switch unit (C) light connects, computer (37)
(36) it is electrically connected respectively with low-coherent light interference unit (A) and photoelectricity trigger unit (D) with second signal line (38), Low coherence
The two-way light of optical interference unit (A) output respectively enters fast zoom unit (B) and more reference arm switch units (C), servo electricity
Machine (41) drives turntable (42) rotation, carries out zoom to the light of low-coherent light interference unit (A) output and optical path switches, along institute
State first to fourth exploration hole and first to fourth reference bore that the clockwise direction of turntable is set gradually, described first to
Four exploration holes and first to fourth reference bore are arcuate socket, first to fourth exploration hole and first to fourth reference bore
The degree of corresponding central angle is 45 °, and described first to third exploration hole arc length is identical, and the arc length of the 4th exploration hole is greater than
The arc length of first exploration hole；The arc length of first to fourth reference bore successively increases, first to fourth reference bore
Outside be respectively arranged with first to fourth photoelectricity triggering through-hole, photoelectricity triggering through-hole is circle, and two photoelectricity triggerings
The distance between through-hole is identical；The first slide and second transparent is respectively provided on second exploration hole and third exploration hole
Piece, which is characterized in that described method includes following steps:
Through the first optical fiber collimator (5) into fast zoom unit (B) detection light successively pass through the first semi-transparent semi-reflecting lens (6),
After the first detection through-hole (2-1) on first lens (7), turntable (42), by the second lens (8), the third lens (9), first
After reflecting mirror (10), the second semi-transparent semi-reflecting lens (13), the 5th lens (14), the anterior surface of cornea (43) of testee is focused on
On, the reflected light of the light of road detection later is by backtracking in the second optical fiber (4)；
The reference light for entering more reference arm switch units (C) through the second optical fiber collimator (16) is logical through third semi-transparent semi-reflecting lens (17)
After crossing the first reference bore (2-5) on turntable, into the reference arm of cornea, the 4th reflecting mirror is converged to through the 6th lens (18)
(19) on, the reflected light backtracking of the road reference light is in third optical fiber (15) later；
Reflected light in second optical fiber (4) and third optical fiber (15) is back to fiber coupler (3), enters through the 4th optical fiber (31)
The light of third optical fiber collimator (32) becomes directional light under its collimating effect, is then irradiated on grating (33), by grating
(33) by the tenth lens (34) after being divided, obtained interference spectrum images in line-scan digital camera (35), finally through line-scan digital camera
(35) electric signal is converted to；At this point, the infrared light that the infrared emission component (40) in photoelectricity trigger unit (D) issues is just passed through
The first photoelectricity on turntable (42) triggers through-hole (2-9), and photoelectric trigger device (39) starts to work and issues trigger signal；
Trigger signal reaches computer (37) through second signal line (38), and thus computer (37) starts the telecommunications generated before acquisition
Number, and then obtain the interference spectrum signal of anterior surface of cornea (43) position.
2. a kind of method for measuring crystalline body front surface interference spectrum signal using optical coherence human eye measuring device, the measurement
Device includes low-coherent light interference unit (A), servo motor (41) and computer (37), the quick change based on rotary glass block
Burnt unit (B), the more reference arm switch units (C) switched using turntable, makes zoom and reference arm using photoelectricity trigger unit (D)
Switching synchronizes；For low-coherent light interference unit (A) by the second optical fiber (4) and fast zoom unit (B) light connects, low-coherent light is dry
Unit (A) is related to by third optical fiber (15) and more reference arm switch unit (C) light connects, computer (37) passes through the first signal wire
(36) it is electrically connected respectively with low-coherent light interference unit (A) and photoelectricity trigger unit (D) with second signal line (38), Low coherence
The two-way light of optical interference unit (A) output respectively enters fast zoom unit (B) and more reference arm switch units (C), servo electricity
Machine (41) drives turntable (42) rotation, carries out zoom to the light of low-coherent light interference unit (A) output and optical path switches, along institute
State first to fourth exploration hole and first to fourth reference bore that the clockwise direction of turntable is set gradually, described first to
Four exploration holes and first to fourth reference bore are arcuate socket, first to fourth exploration hole and first to fourth reference bore
The degree of corresponding central angle is 45 °, and described first to third exploration hole arc length is identical, and the arc length of the 4th exploration hole is greater than
The arc length of first exploration hole；The arc length of first to fourth reference bore successively increases, first to fourth reference bore
Outside be respectively arranged with first to fourth photoelectricity triggering through-hole, photoelectricity triggering through-hole is circle, and two photoelectricity triggerings
The distance between through-hole is identical；The first slide and second transparent is respectively provided on second exploration hole and third exploration hole
Piece, which is characterized in that described method includes following steps:
Through the first optical fiber collimator (5) into fast zoom unit (B) detection light successively pass through the first semi-transparent semi-reflecting lens (6),
First lens (7), after passing through the second exploration hole (2-2) on turntable (42) and the first slide (a) at this, through the
After two lens (8), the third lens (9), the first reflecting mirror (10), the second semi-transparent semi-reflecting lens (13), the 5th lens (14), focus on
On the crystalline body front surface (45) of testee, the reflected light of the light of road detection later is by backtracking in the second optical fiber (4)；
Through the second optical fiber collimator (16) enter more reference arm switch units (C) reference light through third semi-transparent semi-reflecting lens (17),
4th reflecting mirror (20), the 4th semi-transparent semi-reflecting lens (21), after the second reference bore (2-6) on turntable (42), entrance is crystalline
The reference arm of body front surface (45) converges on the 5th reflecting mirror (23) through the 7th lens (22), and the road reference light is anti-later
Light backtracking is penetrated in third optical fiber (15)；
Reflected light in second optical fiber (4) and third optical fiber (15) is back to fiber coupler (3), enters through the 4th optical fiber (31)
Third optical fiber collimator (32), becomes directional light under its collimating effect, is then irradiated on grating (33), by grating (33) point
By the tenth lens (34) after light, thus obtained interference spectrum images in line-scan digital camera (35), finally through line-scan digital camera (35)
Be converted to electric signal；At this point, the infrared light that the infrared emission component (40) in photoelectricity trigger unit (D) issues is just passed through and is located at
The second photoelectricity on turntable (42) triggers through-hole (2-10), and photoelectric trigger device (39) starts to work and issues trigger signal；Touching
It signals to reach computer (37) through second signal line (38), thus computer (37) starts the electric signal generated before acquisition,
And then obtain the interference spectrum signal of crystalline body front surface (45).
3. a kind of method using optical coherence human eye measuring device measurement crystalline lens rear surface interference spectrum signal, the measurement
Device includes low-coherent light interference unit (A), servo motor (41) and computer (37), the quick change based on rotary glass block
Burnt unit (B), the more reference arm switch units (C) switched using turntable, makes zoom and reference arm using photoelectricity trigger unit (D)
Switching synchronizes；For low-coherent light interference unit (A) by the second optical fiber (4) and fast zoom unit (B) light connects, low-coherent light is dry
Unit (A) is related to by third optical fiber (15) and more reference arm switch unit (C) light connects, computer (37) passes through the first signal wire
(36) it is electrically connected respectively with low-coherent light interference unit (A) and photoelectricity trigger unit (D) with second signal line (38), Low coherence
The two-way light of optical interference unit (A) output respectively enters fast zoom unit (B) and more reference arm switch units (C), servo electricity
Machine (41) drives turntable (42) rotation, carries out zoom to the light of low-coherent light interference unit (A) output and optical path switches, along institute
State first to fourth exploration hole and first to fourth reference bore that the clockwise direction of turntable is set gradually, described first to
Four exploration holes and first to fourth reference bore are arcuate socket, first to fourth exploration hole and first to fourth reference bore
The degree of corresponding central angle is 45 °, and described first to third exploration hole arc length is identical, and the arc length of the 4th exploration hole is greater than
The arc length of first exploration hole；The arc length of first to fourth reference bore successively increases, first to fourth reference bore
Outside be respectively arranged with first to fourth photoelectricity triggering through-hole, photoelectricity triggering through-hole is circle, and two photoelectricity triggerings
The distance between through-hole is identical；The first slide and second transparent is respectively provided on second exploration hole and third exploration hole
Piece, which is characterized in that described method includes following steps:
Through the first optical fiber collimator (5) into fast zoom unit (B) detection light successively pass through the first semi-transparent semi-reflecting lens (6),
First lens (7), after passing through the third exploration hole (2-3) and the second slide (b) disposed thereon on turntable (42), through the
After two lens (8), the third lens (9), the first reflecting mirror (10), the second semi-transparent semi-reflecting lens (13), the 5th lens (14), focus on
In the crystalline lens rear surface (46) of testee, the reflected light of the light of road detection later is by backtracking in the second optical fiber (4)；
Through the second optical fiber collimator (16) enter more reference arm switch units (C) reference light through third semi-transparent semi-reflecting lens (17),
4th reflecting mirror (20), the 4th semi-transparent semi-reflecting lens (21), the 6th reflecting mirror (24), the 5th semi-transparent semi-reflecting lens (25), turntable (42)
On third reference bore (2-7) after, into the reference arm of crystalline lens rear surface (46), it is anti-to converge to the 7th through the 8th lens (26)
It penetrates on mirror (27), the reflected light backtracking of the road reference light is in third optical fiber (15) later；
Reflected light in second optical fiber (4) and third optical fiber (15) is back to fiber coupler (3), enters through the 4th optical fiber (31)
Third optical fiber collimator (32), becomes directional light under its collimating effect, is then irradiated on grating (33), by grating (33) point
By the tenth lens (34) after light, thus obtained interference spectrum images in line-scan digital camera (35), finally through line-scan digital camera (35)
Be converted to electric signal；At this point, the infrared light that the infrared emission component (40) in photoelectricity trigger unit (D) issues is just passed through and is located at
Third photoelectricity on turntable (42) triggers through-hole (2-11), and photoelectric trigger device (39) starts to work and issues trigger signal；Touching
It signals to reach computer (37) through second signal line (38), thus computer (37) starts the electric signal generated before acquisition,
And then obtain the interference spectrum signal of crystalline lens rear surface (46).
4. a kind of method using optical coherence human eye measuring device measurement retina interference spectrum signal, the measuring device packet
Include low-coherent light interference unit (A), servo motor (41) and computer (37), the fast zoom unit based on rotary glass block
(B), the more reference arm switch units (C) switched using turntable switch zoom and reference arm using photoelectricity trigger unit (D) same
Step；Low-coherent light interference unit (A) passes through the second optical fiber (4) and fast zoom unit (B) light connects, low-coherent light interference unit
(A) by third optical fiber (15) and more reference arm switch unit (C) light connects, computer (37) by the first signal wire (36) and
Second signal line (38) is electrically connected with low-coherent light interference unit (A) and photoelectricity trigger unit (D) respectively, low-coherent light interference
The two-way light of unit (A) output respectively enters fast zoom unit (B) and more reference arm switch units (C), servo motor (41)
Turntable (42) rotation is driven, zoom is carried out to the light of low-coherent light interference unit (A) output and optical path switches, along the turntable
First to fourth exploration hole that sets gradually of clockwise direction and first to fourth reference bore, first to fourth detection
Hole and first to fourth reference bore are arcuate socket, corresponding to first to fourth exploration hole and first to fourth reference bore
The degree of central angle be 45 °, described first to third exploration hole arc length is identical, and the arc length of the 4th exploration hole is greater than described the
The arc length of one exploration hole；The arc length of first to fourth reference bore successively increases, the outside of first to fourth reference bore
Be respectively arranged with first to fourth photoelectricity triggering through-hole, photoelectricity triggering through-hole is circle, and two photoelectricity triggering through-holes it
Between distance it is identical；It is respectively provided with the first slide and the second slide on second exploration hole and third exploration hole,
It is characterized in that, described method includes following steps:
Detection light into fast zoom unit (B) successively passes through the first semi-transparent semi-reflecting lens (6), the second reflecting mirror (11), passes through
After the 4th reference bore (2-4) on turntable (42), through the 4th lens (12), the second semi-transparent semi-reflecting lens (13) and the 5th lens (14)
Afterwards, it focuses on the retina (47) of testee, the reflected light of the light of road detection later is by backtracking to the second optical fiber (4)
In；
Into more reference arm switch units (C) reference light successively pass through third semi-transparent semi-reflecting lens (17), the 4th reflecting mirror (20),
After 4th semi-transparent semi-reflecting lens (21), the 6th reflecting mirror (24), the 5th semi-transparent semi-reflecting lens (25), the 8th reflecting mirror (28), by turning
The 4th reference bore (2-8) on disk (42) converges to the 9th reflection through the 9th lens (29) into the reference arm of retina (47)
On mirror (30), the road reference light reflected light backtracking is in third optical fiber (15) later；
Reflected light in second optical fiber (4) and third optical fiber (15) is back to fiber coupler (3), enters through the 4th optical fiber (31)
Third optical fiber collimator (32), becomes directional light under its collimating effect, is irradiated on grating (33), after grating (33) light splitting
By the tenth lens (34), thus obtained interference spectrum images in line-scan digital camera (35), is converted to electricity through line-scan digital camera (35)
Signal, at this point, the infrared light that the infrared emission component (40) in photoelectricity trigger unit (D) issues is just passed through positioned at turntable (42)
On the 4th photoelectricity trigger through-hole (2-12), photoelectric trigger device (39) start to work simultaneously issue trigger signal；Trigger signal warp
Second signal line (38) reaches computer (37), and thus computer (37) starts the electric signal generated before acquisition, and then obtains
The interference spectrum signal of retina (47) position.
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| CN108514404B (en) * | 2018-03-28 | 2021-08-10 | 深圳市太赫兹科技创新研究院 | Optical coherence tomography system |
| CN108634928B (en) * | 2018-04-23 | 2020-08-11 | 东北大学秦皇岛分校 | Corneal measurement method and system |
| CN109691975B (en) * | 2018-12-29 | 2023-07-07 | 佛山科学技术学院 | Device and method for measuring cornea curvature of eye based on SD-OCT |
| CN109691972A (en) * | 2018-12-29 | 2019-04-30 | 佛山科学技术学院 | Anterior corneal surface optical path difference measurement device and the method for measuring corneal thickness and refractive index |
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| CN104068825A (en) * | 2014-06-24 | 2014-10-01 | 东北大学 | Short coherence light interference measuring method and device |
| CN203935168U (en) * | 2014-06-25 | 2014-11-12 | 深圳市斯尔顿科技有限公司 | Can realize the ophthalmology OCT device of anterior ocular segment oculi posterior segment imaging simultaneously |
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