WO2013159280A1 - 眼科光学相干断层成像系统及快速切换实现前后节成像方法 - Google Patents

眼科光学相干断层成像系统及快速切换实现前后节成像方法 Download PDF

Info

Publication number
WO2013159280A1
WO2013159280A1 PCT/CN2012/074577 CN2012074577W WO2013159280A1 WO 2013159280 A1 WO2013159280 A1 WO 2013159280A1 CN 2012074577 W CN2012074577 W CN 2012074577W WO 2013159280 A1 WO2013159280 A1 WO 2013159280A1
Authority
WO
WIPO (PCT)
Prior art keywords
eye
total reflection
scanning unit
mirror
direction scanning
Prior art date
Application number
PCT/CN2012/074577
Other languages
English (en)
French (fr)
Inventor
蔡守东
李鹏
郭曙光
代祥松
吴蕾
Original Assignee
深圳市斯尔顿科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市斯尔顿科技有限公司 filed Critical 深圳市斯尔顿科技有限公司
Priority to EP12875405.8A priority Critical patent/EP2767220B1/en
Priority to CN201290000031.1U priority patent/CN203643682U/zh
Priority to PCT/CN2012/074577 priority patent/WO2013159280A1/zh
Priority to US14/124,030 priority patent/US9370300B2/en
Publication of WO2013159280A1 publication Critical patent/WO2013159280A1/zh

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/102Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for optical coherence tomography [OCT]
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00Measuring instruments characterised by the use of optical techniques
    • G01B9/02Interferometers
    • G01B9/0209Low-coherence interferometers
    • G01B9/02091Tomographic interferometers, e.g. based on optical coherence

Definitions

  • the invention relates to the field of optoelectronic technology, in particular to an ophthalmic optical coherence tomography system and a fast switching implementation method for front and rear section imaging. Background technique
  • the length of the axial length is the source of judging the refractive error of the human eye. It distinguishes between true myopia and pseudomyopia, and measures the important parameters of intraocular lens parameters after cataract surgery.
  • the method for measuring the length of the axial length in the prior art includes an A-super-measurement method and an optical measurement method.
  • the existing A-super-measurement method adopts the ultrasonic ranging principle, but requires the probe to directly contact the human eye, and the resolution of the ultrasonic is low, The measurement is not accurate enough, and the optical measurement method is based on the principle of dual-wavelength optical coherence to measure the axial length of the eye.
  • optical coherence tomography OCT
  • patent document 200710020707.9 discloses a utilization. OCT measures the measurement of the axial length of the eye.
  • the moving probe of the stepping motor is used to adjust the optical path to achieve imaging of the cornea and fundus.
  • the motor needs to move forward and backward for a certain period of time. It is impossible to realize fast switching between the front and rear sections and real-time imaging. In addition, the eyes of the measured object will be shaken, which makes the measurement of the length of the eye axis inaccurate and the error is very large. 2. Because the cornea and the fundus structure are different. , the same probe can not be focused in both positions, resulting in poor imaging quality. Summary of the invention
  • the technical problem to be solved by the embodiments of the present invention is to provide an ophthalmic optical coherence tomography system and a method for measuring the axial length of the eye, to realize simultaneous imaging and fast switching at different depth positions, and accurately measure the eye axis on the basis of the present invention. long.
  • an embodiment of the present invention provides an ophthalmic optical coherence tomography system, including: an optical coherence tomography OCT interferometer main module, a sample arm module, wherein the OCT interferometer main module includes an OCT light source, a fiber optic coupler, a reference arm, a detection module, an X-direction scanning unit, and a Y-direction scanning unit, wherein the sample arm module includes an anterior segment imaging module and a posterior segment imaging module, wherein The light output by the OCT light source supplies light to the sample arm module and the reference arm through the fiber coupler, and the reference arm reflects the received light back to the fiber coupler, and the Y direction scanning unit can Rotating, when the Y-direction scanning unit is at the first rotation angle, reflecting the light received by the X-direction scanning unit into the anterior segment imaging module, and when the Y-scanning unit is at the second rotation angle, the X-direction scanning unit Receiving light reflected into the posterior segment imaging module
  • the anterior segment imaging module includes: a total reflection mirror, a rotatable adjustment total reflection mirror, a dichroic mirror, and an ophthalmoscope, wherein
  • the rotatably adjustable full-mirror is a light that is correspondingly rotated and adjusted according to the rotation of the Y-direction scanning unit to the dichroic mirror, and is reflected by the dichroic mirror to the fundus mirror,
  • the ophthalmoscope is incident on the eye of the subject.
  • the anterior segment imaging module further includes at least one relay lens, wherein
  • At least one relay lens is disposed between the Y-direction scanning unit and the total reflection mirror. At this time, when the Y-direction scanning unit rotates the first rotation angle, the light emitted by the X-direction scanning unit is transmitted. The relay lens is emitted to the total reflection mirror; or
  • the posterior segment imaging module includes: an optical path adjusting unit, a refractive adjustment unit, a rotatable adjustment total reflection mirror, a dichroic mirror, and an ophthalmoscope, wherein
  • the rotatably adjustable total reflection mirror is configured to perform corresponding rotation adjustment according to rotation of the Y-direction scanning unit, and cooperate with the Y-direction scanning unit to align the illumination
  • the light of the rotation-adjusting total reflection mirror is reflected to the dichroic mirror, and is reflected by the dichroic mirror to the ophthalmoscope, and is incident on the subject's eye by the ophthalmoscope.
  • the method further includes: an iris imaging module, wherein
  • the iris imaging module includes: a bottom mirror, a dichroic mirror, an iris dichroic mirror, an objective lens, and a camera.
  • the light emitted by the illumination source is irradiated to the cornea of the eye of the subject, and the cornea is reflected. Reflecting light is transmitted through the ophthalmoscope and the dichroic mirror to the iris dichroic mirror, reflected by the dichroic mirror to the objective lens, and transmitted by the objective lens to the camera, by the camera Photographed.
  • the method further includes: a fixation optical module, wherein
  • the fixation optical module includes: a fixation device, a lens, a total reflection mirror, a refractive compensation mirror, a dichroic mirror, and a bottom mirror, after the light of the fixation device is focused by the lens, a total reflection mirror is reflected to the refractive compensation mirror, and is transmitted by the refractive compensation mirror to an iris dichroic mirror in the iris imaging module, and transmitted by the iris dichroic mirror to the dichroic mirror And an ophthalmoscope, which is incident on the eye of the subject by the ophthalmoscope.
  • the optical path adjusting unit comprises four total reflection mirrors, wherein two total reflection mirrors are fixed, and the other two are movable full mirrors, and only two of the total mirrors are required to achieve optical path adjustment
  • the optical path adjustment can be realized by moving the other two movable total mirrors at the same time.
  • the optical path adjusting unit further comprises two total reflection mirrors and one movable reverse retroreflector, and only needs to keep two total reflection mirrors in motion when performing optical path adjustment, and at the same time, by moving the movable reverse To the retroreflector, the optical path adjustment can be achieved.
  • the total reflection mirror in the Y-direction scanning unit adopts a galvanometer.
  • the fixation device in the fixation optical module includes an LCD or an OLED.
  • the adjustment amount of the optical path adjusting unit is obtained by a position sensor, and the position sensor is added to the movable total reflection mirror or the movable reverse retroreflector in the optical path adjustment unit.
  • the embodiment of the present invention further provides a fast switching implementation method for anterior-posterior segment imaging, including:
  • the rotatable adjustment full-mirror is a light that is correspondingly rotated and adjusted according to the rotation of the Y-direction scanning unit to the dichroic mirror, and is reflected by the dichroic mirror to the ophthalmoscope.
  • the ophthalmoscope is incident on the eye of the subject.
  • the rotatable adjustment full mirror is correspondingly rotated according to the rotation of the scan direction scanning unit, and cooperates with the x direction scanning unit to illuminate the illumination
  • the light of the rotatable adjustment total reflection mirror is reflected to the dichroic mirror, and is reflected by the dichroic mirror to the ophthalmoscope, and is incident on the subject's eye by the ophthalmoscope.
  • the optical distance of the light in the anterior segment imaging is obtained from the optical fiber and reaches the cornea of the tester, and the optical distance is the optical path of the anterior segment of the anterior segment and the cornea in the OCT image of the anterior segment of the eye.
  • a distance ⁇ from the top to the top of the image, wherein the inherent optical path of the anterior segment of the anterior segment is a parameter inherent to the system, and the distance A from the tip of the cornea to the top of the image in the OCT image of the anterior segment of the eye is obtained by analyzing the OCT image;
  • the optical distance of the light in the posterior segment of the eye is obtained from the optical fiber and reaches the retina of the tester, and the optical distance is the optical path of the posterior segment of the eye and the optical path adjustment
  • the amount + the distance B from the top of the image in the OCT image of the posterior segment of the eye to the fovea of the macula, wherein the posterior segment of the eye is a parameter inherent to the system, and the distance B from the top of the eye to the fovea of the macula in the OCT image of the posterior segment of the eye passes Analysis of the OCT image is obtained;
  • the corneal front surface in the corneal image in the anterior segment imaging light path is acquired, and the eye is changed by adjusting the movable total reflection mirror or the movable reverse retroreflector in the optical path adjustment unit.
  • the posterior segment is configured to optically measure the optical path to obtain the anterior chamber optical depth, the anterior chamber optical depth being the distance from the cornea to the anterior surface of the lens, wherein the anterior surface of the cornea utilizes an anterior segment imaging system As a result, the front surface of the lens is realized by a target posterior segment imaging system.
  • the system When the system performs imaging of the anterior segment of the eye, acquiring a corneal image in the imaging path of the anterior segment of the eye, Adjusting the movable total reflection mirror or the movable reverse retroreflector in the optical path adjustment unit to change the optical path of the posterior segment of the eye, so that the posterior optical path measures the posterior surface of the lens to obtain the cornea to the posterior surface of the lens a distance by which the optical depth of the anterior chamber is subtracted to obtain an optical thickness of the lens; or
  • the invention can realize fast switching and real-time imaging at different depth positions, and has a fast switching function on the one hand, can measure different depths of objects, improve the detection range of the OCT system, and the switching system is stable, the positioning is accurate, and the system is not affected.
  • Signal-to-noise ratio; on the other hand, the beam can be separately focused at different positions, and high-quality anterior-posterior imaging can be achieved for human eyes with different visual acuity, with high lateral resolution, and on the basis of anterior-posterior imaging of the eye, Increase the ability to measure the length of the eye axis in real time.
  • FIG. 1 is a schematic structural view of a first example of an ophthalmic optical coherence tomography system according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of an ocular anterior segment imaging module in an ophthalmic optical coherence tomography system according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an eyelid imaging module implemented in an ophthalmic optical coherence tomography system according to an embodiment of the present invention
  • FIG. 4 is a schematic structural view of an iris imaging module in an ophthalmic optical coherence tomography system according to an embodiment of the present invention
  • FIG. 5 is a schematic structural view of a fixation optical module in an ophthalmic optical coherence tomography system according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a method for quickly switching between anterior and posterior segments of the eye according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of measuring an axial length on the basis of fast switching to achieve anterior and posterior segment imaging of an eye according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a method for measuring an axial length based on fast switching to implement anterior and posterior segment imaging of an eye according to an embodiment of the present invention. detailed description
  • FIG. 1 is a schematic structural diagram of a first example of an ophthalmic optical coherence tomography system according to an embodiment of the present invention, as shown in FIG. 1, comprising: an optical coherence tomography OCT interferometer main module, a sample arm module, wherein
  • the OCT interferometer main module includes an OCT light source 101, a fiber coupler 102, a reference arm 104, a detecting module 106, an X-direction scanning unit 109, and a Y-direction scanning unit 110.
  • the sample arm module includes an anterior segment imaging module and a posterior segment. Imaging module, wherein
  • the X-direction scanning unit 109 receives the light output by the OCT light source 101, and the Y-direction scanning unit 110 is rotatable. When the Y-direction scanning unit 110 is at the first rotation angle, the X-direction scanning unit 109 receives the same. The light is reflected into the anterior segment imaging module, and when the Y scanning unit 110 is at the second rotation angle, the light received by the X-direction scanning unit 109 is reflected into the posterior segment imaging module, and the fiber coupler 102 receives the sample.
  • the arm module scatters the reflected light and interferes with the reflected light from the reference arm 104, which is used to detect the interfering light and is processed and displayed by the computer 107.
  • the detector in the detecting module 106 is a light language meter (the system is a frequency domain OCT), and when the OCT light source 101 is When the frequency source is swept, the detector is a high speed photodetector (the system is a swept OCT), and the reference arm 104 includes a reference mirror 105 and a collimating mirror 108, wherein the reference arm 104 passes through the reference mirror 105.
  • the received light output by the OCT light source 101 is reflected back into the fiber coupler 102, and the collimating mirror 108 transmits the light output by the OCT light source 110 to the X direction scanning unit 109,
  • the Y-direction scanning unit 110 is rotatable, and the optical path emitted by the X-direction scanning unit 109 is reflected into the imaging module corresponding to the rotation angle by the rotation of the Y-direction scanning unit 110, that is, when the Y-direction scanning unit 110 is in the first
  • the OCT interferometer main module further includes a polarization controller 103, and the polarization controller 103 is connected to the fiber coupler 102 for Light reflected from the sample arm module is received and
  • the sample arm module includes an anterior segment imaging module and a posterior segment imaging module, wherein the anterior segment imaging module includes: a total reflection mirror 202, a rotatable adjustment total reflection mirror 401, and a dichroic mirror 402 and an ophthalmoscope 403, wherein when the Y-direction scanning unit 110 rotates the first rotation angle, the light emitted by the X-direction scanning unit 109 is reflected to the total reflection mirror 202, and is reflected by the total reflection mirror 202.
  • the rotatable adjustment total reflection mirror 401 is correspondingly rotated according to the rotation of the Y-direction scanning unit 110, and cooperates with the Y-direction scanning unit 110
  • Light reflecting the illumination on the rotatable total reflection mirror 401 is reflected to the dichroic mirror 402, reflected by the dichroic mirror 402 to the ophthalmoscope 403, and incident on the ocular lens 403 by the ocular lens 403
  • the sample arm module includes an anterior segment imaging module and a posterior segment imaging module, wherein the posterior segment imaging module includes a rotatable adjustment total reflection mirror 401 in the anterior segment imaging module.
  • the posterior segment imaging module further includes: an optical path adjusting unit, a refractive adjustment unit 305, and when the Y-direction scanning unit 110 rotates a second rotation angle, the X is The light emitted by the direction scanning unit 109 is reflected into the first full-mirror 301 in the optical path adjusting unit, and passes through the second full-reflecting mirror 302, the third full-reflecting mirror 303, and the fourth full-reflecting mirror 304.
  • the optical path adjusting unit is reflected through the dimming adjusting unit 305 to the rotatable adjusting total reflection mirror 401, and the rotatable adjusting full-reflecting mirror 401 is corresponding according to the rotation angle of the Y-direction scanning unit 110.
  • the rotationally adjustable total reflection mirror 401, the dichroic mirror 402 and the fundus mirror 403 in the anterior segment imaging module, and the rotatable adjustable total reflection mirror 401 and the two directions in the posterior segment imaging module The color mirror 402 and the ophthalmoscope 403 are identical.
  • the ophthalmic optical coherence tomography system further includes an iris imaging module, wherein the iris imaging module comprises: an iris dichroic mirror 501, an objective lens 502, and a camera 503, when the light emitted by the illumination source is illuminated
  • the iris imaging module comprises: an iris dichroic mirror 501, an objective lens 502, and a camera 503, when the light emitted by the illumination source is illuminated
  • the cornea of the human eye is examined and reflected at the cornea, and the reflected light is transmitted through the ophthalmoscope 403 and the dichroic mirror 402 to the iris dichroic mirror 501 by the iris dichroic mirror 501 is reflected to the objective lens 502, transmitted by the objective lens 502 to the camera 503, and captured by the camera 503.
  • the ophthalmic optical coherence tomography system further includes a fixation optical module, wherein the fixation optical module includes: a fixation device 601, a lens 602, a total reflection mirror 603, and a refractive compensation mirror 604.
  • the fixation optical module includes: a fixation device 601, a lens 602, a total reflection mirror 603, and a refractive compensation mirror 604.
  • the fixation device 601 After the optical path of the fixation device 601 is focused by the lens 602, it is reflected by the total reflection mirror 603 to the refractive compensation mirror 604, and transmitted by the refractive compensation mirror 604 to the iris dichroic mirror 501.
  • the dichroic mirror 501 is transmitted to the dichroic mirror 402 and the ophthalmoscope 403, and is incident on the subject's eye E by the ophthalmoscope 403.
  • the ophthalmic optical coherence tomography system can realize the function of the posterior segment of the eye and the imaging function of the anterior segment, and the Y-direction scanning unit 110 and the rotatable adjusting total mirror 401 cooperate with each other. That is, while rotating the Y-direction scanning unit 110, the rotatable total reflection mirror 401 also rotates correspondingly, enabling fast and accurate real-time imaging at different depth positions and switching between the front and rear section imaging systems.
  • the function of measuring the axial length of the eye in real time is added.
  • the anterior segment imaging module includes: a total reflection mirror 202, and a rotatable adjustment a mirror 401, a dichroic mirror 402, and an ophthalmoscope 403, wherein when the Y-direction scanning unit 110 rotates the first rotation angle, the light emitted by the X-direction scanning unit 109 is emitted to the total reflection mirror 202.
  • the total reflection mirror 202 is reflected by the total reflection mirror 202 to the rotatable adjustment total reflection mirror 401, and the rotation adjustment total reflection mirror 401 is adjusted according to the rotation of the Y direction scanning unit 110, and The Y-direction scanning unit 110 cooperates to realize the reflection of the light irradiated on the rotatable adjustment total reflection mirror 401 to the dichroic mirror 402, and is reflected by the dichroic mirror 402 to the ophthalmoscope 403.
  • the ophthalmoscope 403 is incident on the subject's eye E.
  • the anterior segment imaging module further includes at least one relay lens, wherein at least one relay lens is disposed between the Y-direction scanning unit 110 and the total reflection mirror 202, and at this time, the Y When the direction scanning unit 110 rotates the first rotation angle, the light emitted by the X direction scanning unit 109 is transmitted to the total reflection mirror 202 through the relay lens; or
  • At least one relay lens is disposed between the total reflection mirror 202 and the rotatable total reflection mirror 401. At this time, the light emitted by the X-direction scanning unit 109 is reflected by the total reflection mirror 202.
  • the relay lens is irradiated to the rotatable adjustment total reflection mirror 401.
  • the anterior segment imaging optical path in the embodiment of the present invention includes two relay lenses, that is, a first relay lens 201 and a second relay lens 203, wherein the first relay lens 201 is in the whole Between the mirror 202 and the Y-direction scanning unit 110, the second relay lens 203 is between the total reflection mirror 202 and the rotatable adjustment total reflection mirror 401.
  • the Y-direction scanning unit 110 When the first rotation angle is rotated, the light emitted by the X-direction scanning unit 109 is transmitted to the total reflection mirror 202 through the first relay lens 201, and is reflected by the total reflection mirror 202 through the second The lens 203 is irradiated to the rotatable total reflection mirror 401, reflected by the dichroic mirror 402 to the ophthalmoscope 403, and finally concentrated by the human eye E to the fundus.
  • the rotatable adjustment total reflection mirror 401 and the Y-direction scanning unit 110 are simultaneously controlled by a computer, and the first rotation angle of the Y-direction scanning unit 110 is controlled by a computer, and the Y is The position of the direction scanning unit 110 is such that the angle between the incident light and the reflected light is an angle ⁇ , and the computer controls the rotatable total reflection mirror 401 according to the first rotation angle of the scanning direction unit 110.
  • the light beam is transmitted to the total reflection mirror 202 through the first relay lens 201 through the ⁇ direction scanning unit 110, by the whole
  • the mirror 202 is reflected through the second relay lens 203 to the rotatable adjustment total reflection mirror 401, is reflected by the dichroic mirror 402 to the ophthalmoscope 403, and finally converges to the fundus through the human eye. .
  • the ⁇ direction scanning unit 110 functions not only as a one-dimensional scanning but also as an optical path switching.
  • the ⁇ direction scanning unit 110 uses a galvanometer or The high-precision positioning mechanism can meet the requirement of fast switching of the optical path of the system.
  • the scanning direction of the scanning unit 110 is rotated, and the optical path is reflected from the X-direction scanning unit 109 to the total reflection mirror 301.
  • the light is rotated by an angle ⁇ ; when the cornea is measured, the scanning direction of the scanning unit 110 is rotated, and the optical path is reflected from the X-direction scanning unit 109 to the first relay lens 201, and the light is rotated by a ⁇ angle.
  • the rotation adjusting full-mirror 401 is correspondingly rotated according to the rotation of the scanning direction scanning unit 110, and the rotation direction adjusting unit 110 and the rotatable adjusting total reflection mirror 401 are matched with each other to realize the front and rear sections. Fast switching of the light path.
  • the posterior segment imaging module includes the anterior segment of the eye as shown in FIG.
  • the posterior segment imaging module further includes: a refractive adjustment unit 305, an optical path adjustment unit,
  • the Y-direction scanning unit 110 rotates the second rotation angle
  • the optical path emitted by the X-direction scanning unit 109 is reflected into the first full-mirror 301 of the optical path adjusting unit, and passes through the second full-reflecting mirror 302.
  • a third total reflection mirror 303 and a fourth total reflection mirror 304 are reflected by the fourth full reflection mirror 304 through the refractive adjustment unit 305 to the rotatable adjustment total reflection mirror 401, and the rotatable adjustment
  • the full-mirror 401 and the x-direction scanning unit 110 cooperate to realize an imaging line of the posterior segment of the eye.
  • the rotatable adjustment total reflection mirror 401 and the ⁇ direction scanning unit 110 are simultaneously controlled by a computer, and the ⁇ direction scanning unit 110 rotates the second rotation angle while the rotation is
  • the adjustment total reflection mirror 401 also rotates correspondingly, that is, the rotatable adjustment full mirror 401 and the pupil direction scanning unit 110 cooperate to realize the imaging optical path of the posterior segment.
  • the second rotation angle of the scanning direction unit 110 is controlled by a computer. At this time, the position of the scanning direction unit 110 is exactly such that the angle between the incident light and the reflected light is an angle ⁇ .
  • the optical path emitted by the X-direction scanning unit 109 is reflected by the ⁇ direction scanning unit 110 into the first full-mirror 301 of the optical path adjusting unit, and passes through the second full-reflecting mirror 302 and the third full-reflecting mirror 303.
  • the fourth full-reflection mirror 304 is reflected by the fourth full-reflection mirror 304 through the refractive adjustment unit 305 to the rotatable adjustment total reflection mirror 401, and then reflected by the dichroic mirror 402.
  • the ophthalmoscope 403 that is, the OCT imaging of the eyepiece, requires the OCT beam to converge on the fundus when the scanning galvanometer is not moving, and the center beam of the scanning beam converges on the pupil when the galvanometer is scanned.
  • the reference arm 104 in the OCT imaging module is not adjustable, and therefore in the fundus optical path in the posterior segment imaging module.
  • the present invention adds optical path adjustment to the fundus optical path after the two-dimensional galvanometer in the optical path adjusting unit.
  • the optical path adjusting unit includes four total reflection mirrors, wherein two total reflection mirrors are fixed, and the other two are movable full mirrors, that is, the first total reflection mirror 301 and the fourth total reflection mirror 304 are
  • the second full-reflection mirror 302 and the third full-reflection mirror 303 are movable total reflection mirrors, and only need to keep two of the full mirrors stationary when the optical path adjustment is implemented, that is, to maintain the first All-reverse 301, the fourth full-reflection mirror 304 is fixed, and at the same time moving the other two movable total reflection mirrors, that is, moving the second full-reflection mirror 302 and the third full-reflection mirror 303, the optical path adjustment can be realized, so that Different human eyes, by adjusting the movable total reflection mirror, that is, the second total reflection mirror 302 and the third total reflection mirror 303, the optical path difference of the front and rear sections is determined, When doing fast switching in this way, the Doppler shift is not introduced.
  • the optical path adjusting unit in the embodiment of the present invention further includes two total reflection mirrors and one movable reverse retroreflector, and only needs to keep two total reflection mirrors in motion when performing optical path adjustment, and at the same time, by moving The movable reverse retroreflector enables optical path adjustment.
  • the iris imaging module includes: a bottom mirror 403, a dichroic mirror 402, The iris dichroic mirror 501, the objective lens 502, and the camera 503, when the light emitted by the illumination source is irradiated to the cornea of the human eye E of the subject, and is reflected at the cornea, the reflected light is transmitted through the ophthalmoscope 403 and the dichroic color.
  • the mirror 402 is incident on the iris dichroic mirror 501, and is reflected by the iris dichroic mirror 501 to the objective lens 502, and transmitted by the objective lens 502 to the camera 503, and is captured by the camera 503.
  • the monitoring optical path in the iris imaging module in the embodiment of the present invention instructs the doctor to operate the instrument and understand related information of the test subject, and the examiner uses the lower chin rest system to fix the eye to be inspected, so that the eye is fixed from the fixed optical module.
  • the examiner controls the movement of the lower support system by the operation lever while observing the display screen of the computer 107 in the main module of the OCT interferometer, so that the eye E is inspected.
  • the cornea enters the camera 503 of the iris imaging module, and the cornea image is presented in the display screen of the computer 107 in the main module of the OCT interferometer to guide the doctor to operate the instrument and to learn information about the human eye E being measured. .
  • the iris dichroic mirror 501 can reflect not only the illumination light emitted from the illumination source in the iris imaging module but also the fixation device 601 in the fixation optical module. The light is transmitted.
  • FIG. 5 is a schematic structural diagram of a fixation optical module in an ophthalmic optical coherence tomography system according to an embodiment of the present invention.
  • the fixation optical module includes: a fixation device 601, a lens 602, and a total reflection.
  • the compensation mirror 604 is transmitted by the refractive compensation mirror 604 to the iris dichroic mirror 501 in the iris imaging module, and is transmitted by the iris dichroic mirror 501 to the dichroic mirror 402 and the ophthalmoscope 403.
  • the ophthalmoscope 403 is incident on the subject's eye E.
  • the internal fixation target can be used to change the fixation position of the eye E to be inspected, and the internal fixation target can be moved up, down, left, and right to satisfy different positions of the human eye.
  • the refractive adjustment unit 305 in the posterior segment imaging module and the refractive compensation mirror 604 in the fixation optical module are simultaneously controlled to move by the computer.
  • the fixation point is fixed, the degree of clarity of the fixation point is different when viewed by different human eyes, which causes discomfort when the subject is fixed, so the OCT optical path of the posterior segment imaging module passes through the refraction adjustment unit. After 305 adjustment, it can focus on the retina of the fundus so that the human eye can see the clear scan line.
  • the refractive compensation mechanism is introduced in the fixation point by the refractive compensation mirror 604 in the fixation optics, so that it can be realized for different human eyes.
  • the OCT optical path of the posterior segment imaging module is affected, and the fixation point cannot follow the four in the optical path adjustment unit.
  • the total reflection mirrors move together, so that the fixation optical path is inevitably in front of the four total reflection mirrors in the optical path adjustment unit, and the embodiment of the present invention realizes the refractive adjustment in the posterior segment imaging module by computer control.
  • the unit 305 moves simultaneously with the refractive compensation mirror 604 in the fixation optical module, and realizes a linkage mechanism between the refractive adjustment unit 305 and the refractive compensation mirror 604, and realizes the posterior segment imaging module by computer control.
  • the refractive adjustment unit 305 moves together with the refractive compensation mirror 604 in the fixation optical module, which can achieve the fixation of the human eye without affecting the imaging module of the posterior segment. OCT light path.
  • fixation light emitted by the fixation device 601 in the fixation optical module includes visible light having a wavelength of 550 nm.
  • FIG. 6 is a schematic diagram of a method for rapidly switching anterior and posterior segment imaging according to an embodiment of the present invention. As shown in FIG. 6, the method includes:
  • the rotatable adjustment total reflection mirror 401 and the Y-direction scanning unit 110 are simultaneously controlled by a computer, and the first rotation angle of the Y-direction scanning unit 110 is controlled by a computer, and the Y is
  • the direction scanning unit 110 is located at a position such that the incident light and the reflected light are at an angle ⁇ , and the computer controls the rotatable total reflection mirror 401 according to the ⁇ direction.
  • the first rotation angle of the scanning unit 110 is rotated correspondingly, and cooperates with the Y-direction scanning unit 110 to realize imaging of the anterior segment of the eye.
  • the optical path is transmitted through the Y-direction scanning unit 110.
  • the first relay lens 201 is emitted to the total reflection mirror 202, and is reflected by the total reflection mirror 202 through the second relay lens 203 to the rotatable adjustment total reflection mirror 401, and then passes through the two directions.
  • the color mirror 402 is reflected to the ophthalmoscope 403 and finally concentrated by the human eye E to the bottom of the eye.
  • the adjusting unit is irradiated to the rotatable adjusting total reflection mirror, and the rotatable adjusting full mirror is correspondingly rotated according to the rotation of the Y-direction scanning unit, and cooperates with the Y-direction scanning unit
  • the light irradiated on the rotatable total reflection mirror is reflected to the dichroic mirror, and is reflected by the dichroic mirror to the ophthalmoscope, and is incident on the eye of the subject by the ophthalmoscope.
  • the rotatable adjustment total reflection mirror 401 and the Y-direction scanning unit 110 are simultaneously controlled by a computer, and the second rotation angle of the Y-direction scanning unit 110 is controlled by a computer, and the Y is
  • the position of the direction scanning unit 110 is such that the angle between the incident light and the reflected light is an angle ⁇ , and the OCT beam is concentrated on the fundus when the scanning galvanometer is not moved during the imaging of the posterior segment of the eye.
  • the Y-direction scanning unit 110 Reflecting the optical path emitted by the X-direction scanning unit 109 into the optical path adjusting unit, and the optical path adjusting unit reflects the translucent adjusting unit 305 to the rotatable adjusting total reflection mirror 401,
  • the rotatable adjustment full-mirror 401 is correspondingly rotated according to the second angle of rotation of the Y-direction scanning unit 110, and cooperates with the Y-direction scanning unit 110 to realize imaging of the posterior segment of the eye, and the illumination is performed
  • the light of the rotatable adjustment total reflection mirror 401 is reflected to the dichroic mirror 402, reflected by the dichroic mirror 402 to the ophthalmoscope 403, and finally concentrated by the human eye E To the pupil of the eye
  • the Y-direction scanning unit 110 and the rotatable adjustment total reflection mirror 401 cooperate with each other to realize switching of the front and rear optical paths.
  • FIG. 7 is a schematic structural diagram of measuring an axial length on the basis of fast switching to implement anterior and posterior segment imaging according to an embodiment of the present invention, and FIG. 7 includes: a corneal apex in the anterior segment OCT image, an anterior segment of the anterior segment image D, and an anterior segment OCT.
  • the embodiment of the present invention implements light by resetting the movable total reflection mirrors 302 and 303.
  • the front and rear sections of the road are quickly switched, so that the measured object moves back and forth, so that the OCT signal of the object is in the same position in the OCT image of the front and rear sections, that is, the distance from the interference surface to the top of the image is the same.
  • the calibration can be performed. Measuring the value of the fixed optical path difference CO of the anterior and posterior segments of the eye, simultaneously moving the movable total reflection mirrors 302 and 303 up and down, finding the OCT image of the retina of the human eye, and rapidly imaging the anterior and posterior segments of the eye to obtain the front of the eye.
  • the OCT image of the posterior segment wherein the movable total reflection mirrors 302 and 303 are moved by X, respectively, for measuring the distance A from the corneal tip to the top of the image in the OCT image of the anterior segment of the eye and the top of the image in the OCT image of the posterior segment of the eye.
  • the measurement of the axial length of the eye is achieved on the basis of the imaging of the anterior segment of the eye and the posterior segment of the eye.
  • FIG. 8 is a schematic diagram of a method for measuring an axial length based on fast switching to implement anterior and posterior segment imaging according to an embodiment of the present invention, and the method for measuring an axial length includes:
  • the rotatable adjusting full-mirror 401 is correspondingly rotated according to the first angle of rotation of the Y-direction scanning unit 110, and The Y-direction scanning unit 110 cooperates with each other to realize anterior segment imaging, and the light beam is transmitted to the total reflection mirror 202 through the Y-direction scanning unit 110 through the first relay lens 201, and is reflected by the total reflection mirror 202.
  • a second relay lens 203 to the rotatable adjustable total reflection mirror 401 The dichroic mirror 402 is reflected to the ophthalmoscope 403, and finally passes through the human eye E.
  • the optical distance that the light passes through the optical fiber and reaches the tester's cornea is the optical path of the anterior segment of the anterior segment and the cornea of the anterior segment OCT image.
  • a distance A from the top to the top of the image, wherein the inherent optical path of the anterior segment of the anterior segment is a parameter inherent to the system, and the distance A from the tip of the cornea to the top of the image in the OCT image of the anterior segment of the eye is obtained by analyzing the OCT image.
  • the position of the equal interference surface of the anterior segment imaging optical path is F in FIG.
  • the system when the system performs imaging of the posterior segment of the eye, acquiring an optical distance that the light in the image of the posterior segment of the eye passes from the optical fiber and reaches the retina of the tester, and the optical distance is an optical path of the posterior segment of the eye.
  • the Y-direction scanning unit 110 reflects the optical path emitted by the X-direction scanning unit 109 into the optical path adjusting unit, and the optical path adjustment is performed.
  • the unit reflection is transmitted through the dimming adjustment unit 305 to the rotatable total reflection mirror 401, and then reflected by the dichroic mirror 402 to the ophthalmoscope 403, and finally concentrated by the human eye E to the pupil of the human eye.
  • the optical distance that the light passes through the optical fiber and reaches the tester's retina is the intrinsic optical path of the posterior segment of the eye + the optical path adjustment amount + the distance B from the top of the image to the fovea of the fovea in the OCT image of the posterior segment of the eye, wherein the eye
  • the posterior segment optical path is a parameter inherent to the system, and the distance B from the top of the image to the fovea of the fovea in the OCT image of the posterior segment of the eye is obtained by analyzing the OCT image, and the position of the interference surface of the posterior segment imaging optical path is as shown in FIG. In the middle G, the position at which the interference surface of the fundus optical path moves is H in FIG.
  • the interference surface of the bottom optical path (the position shown by G in FIG. 8) is The optical path difference between the equal interference planes of the front optical path (the position shown by F in Fig. 8) is C0, and the distance can be scaled. It is measured that, since the axial length of the human eye is different, when the fundus OCT imaging is performed, the interference surface of the optical path and the like in the fundus imaging is at the position shown by G in FIG. 8 by simultaneously moving the movable total reflection mirrors 302 and 303.
  • the measurement of the axial length of the eye is performed on the basis of the imaging of the anterior segment of the eye and the posterior segment of the eye.
  • the measuring of the length of the eye axis is as follows: First, the movable total reflection mirrors 302 and 303 are reset.
  • the fixed optical path difference of the posterior segment is CO, wherein the fixed optical path difference CO of the anterior and posterior segments of the eye is obtained according to calibration, that is, by resetting the movable total reflection mirrors 302 and 303, the front and rear sections of the optical path are fast.
  • the ophthalmic optical coherence tomography system can also be used for measuring the anterior chamber depth, and the method for measuring the anterior chamber depth is the same as the principle of measuring the axial length of the eye.
  • the system collects the anterior surface of the cornea in the corneal image in the imaging light path of the anterior segment during the imaging of the anterior segment, and adjusts the movable total reflection mirror in the optical path adjustment unit, that is, the second total reflection mirror 302, the third The total reflection mirror 303 or the movable reverse retroreflector can change the optical path of the posterior segment imaging light path, so that the posterior segment optical path can be measured to obtain the anterior chamber optical depth, and the anterior chamber optical depth is The distance from the cornea to the anterior surface of the lens, wherein the anterior surface of the cornea is achieved using an anterior segment imaging system that is implemented using a posterior segment imaging system.
  • anterior chamber Depth anterior chamber optical depth / anterior refractive index.
  • the ophthalmic optical coherence tomography system can also be used for measuring the thickness of the lens.
  • the corneal image in the imaging optical path of the anterior segment is acquired.
  • the optical path of the posterior segment of the eye is changed, so that the posterior optical path measures the crystal-shaped rear surface, and the cornea is obtained to the crystal-shaped rear surface. a distance by which the optical depth of the anterior chamber is subtracted to obtain the crystalline optical thickness; or
  • the front and rear surfaces of the lens are measured, and any one or two of the front and rear optical paths may be inserted into the lens to change the position of the light path gathering point so that the light path focusing point is just on the front and rear surfaces of the lens. .
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

一种眼科光学相干断层成像系统和应用所述系统快速切换实现前后节成像的方法,所述系统包括:光学相干断层成像(OCT)干涉仪主模块,样品臂模块。OCT干涉仪主模块包括OCT光源(101),光线耦合器(102),参考臂(104),探测模块(106),X方向扫描单元(109),Y方向扫描单元(110)。样品臂模块包括眼前节成像模块,眼后节成像模块。所述Y方向扫描单元(110)可转动,当Y方向扫描单元(110)处于第一转动角度时,将所述X方向扫描单元(109)接收到的光反射进入眼前节成像模块。当Y扫描单元(110)处于第二转动角度时,将所述X方向扫描单元(109)接收到的光反射进入眼后节成像模块。所述方法可实现在不同深度位置的同时成像和快速切换及在此基础上准确地测量出眼轴长。

Description

眼科光学相干断层成像系统及快速切换实现前后节成像方法 技术领域
本发明涉及光电子技术领域, 尤其涉及一种眼科光学相干断层成像系统及 快速切换实现前后节成像方法。 背景技术
眼轴长是判断人眼屈光不正的根源, 区别真性近视与假性近视, 测算白内 障手术后人工晶体参数的重要指标。
现有技术中测量眼轴长的方法包括 A超测量法和光学测量法, 现有的 A超 测量法是采用超声测距原理, 但需要探头直接接触人眼, 且超声的分辨率较低、 测量不够精确, 而光学测量法基于双波长的光相干原理来测量眼轴长, 其中光 学相干断层成像 ( OCT, Optical Coherence Tomography )就是一种新兴的光学成 像技术,专利文献 200710020707.9公开了一种利用 OCT测量眼轴长的测量方法, 该方法虽然可以实现人眼和各种动物活体的眼轴长度的测量, 但发明人在实施 本发明的过程中, 发现现有技术至少具有如下缺点: 1 , 采用步进电机的移动探 头, 来实现光程的调节, 从而实现角膜和眼底的成像。 而电机发生前后移动需 要一定的时间, 无法实现前后节快速切换并实时成像, 加上被测对象的眼睛会 抖动, 使得测量眼轴长度不准确, 误差非常大; 2, 由于角膜及眼底结构不同, 采用同一个探头无法在这两个位置都聚焦, 导致成像质量差。 发明内容
本发明实施例所要解决的技术问题在于, 提供一种眼科光学相干断层成像 系统及测量眼轴长的方法, 实现在不同深度位置的同时成像和快速切换以及在 此基础上准确地测量出眼轴长。
为了解决上述技术问题, 本发明实施例提供了一种眼科光学相干断层成像 系统, 包括: 光学相干断层成像 OCT干涉仪主模块, 样品臂模块, 其中, 所述 OCT干涉仪主模块包括 OCT光源、 光纤耦合器、 参考臂、 探测模块、 X方向扫 描单元、 Y 方向扫描单元, 所述样品臂模块包括眼前节成像模块、 目艮后节成像 模块, 其中, 所述 OCT光源输出的光经过所述光纤耦合器向所述样品臂模块和参考臂提 供光, 所述参考臂将接收到的光反射回到所述光纤耦合器, 所述 Y方向扫描单 元可转动, 当 Y方向扫描单元处于第一转动角度时, 将所述 X方向扫描单元接 收到的光反射进入眼前节成像模块, 当 Y扫描单元处于第二转动角度时, 将所 述 X方向扫描单元接收到的光反射进入眼后节成像模块, 所述光纤耦合器接收 所述样品臂模块散射回来的光, 并与所述参考臂的反射回来的光发生干涉, 所 述探测模块用于探测所述干涉光。
其中, 所述眼前节成像模块包括: 全反射镜、 可转动调节全反射镜、 二向 色镜及眼底镜, 其中,
所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出的 光发射到所述全反射镜, 由所述全反射镜反射到所述可旋转调节全反射镜, 所 述可旋转调节全反镜是根据所述 Y 方向扫描单元的转动而做相应的旋转调节 的光反射到所述二向色镜, 由所述二向色镜反射到所述眼底镜, 由所述眼底镜 入射到被检人眼。
其中, 所述眼前节成像模块还包括至少一个中继透镜, 其中,
在所述 Y方向扫描单元和所述全反射镜之间至少有一个中继透镜, 此时, 所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出的光透 过所述中继透镜发射到所述全反射镜; 或
在所述全反射镜和所述可旋转调节全反射镜之间至少有一个中继透镜, 此 时, 由所述全反射镜将所述 X方向扫描单元发出的光反射透过所述中继透镜照 射到所述可旋转调节全反射镜。
其中, 所述眼后节成像模块包括: 光程调节单元、 屈光调节单元、 可转动 调节全反射镜、 二向色镜及眼底镜, 其中,
所述 Y方向扫描单元转动第二转动角度时, 将所述 X方向扫描单元发出的 光反射进入所述光程调节单元, 由所述光程调节单元反射透过所述屈光调节单 元照射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Y方向 扫描单元的转动而做相应的旋转调节, 并和所述 Y方向扫描单元相互配合将所 述照射在可旋转调节全反射镜的光反射到所述二向色镜, 由所述二向色镜反射 到所述眼底镜, 由所述眼底镜入射到被检人眼。 其中, 还包括: 虹膜成像模块, 其中,
所述虹膜成像模块包括: 目艮底镜、 二向色镜、 虹膜二向色镜、 物镜、 摄像 器, 照明光源发出的光照射到被检人眼的角膜, 并在角膜发生反射, 所述反射 光透射所述眼底镜和二向色镜到所述虹膜二向色镜, 由所述二向色镜反射到所 述物镜, 由所述物镜透射到所述摄像器, 由所述摄像器拍摄到。
其中, 还包括: 固视光学模块, 其中,
所述固视光学模块包括: 固视设备、 透镜、 全反射镜、 屈光补偿镜、 二向 色镜、 目艮底镜, 所述固视设备的光经过所述透镜聚焦之后, 被所述全反射镜反 射到所述屈光补偿镜, 由所述屈光补偿镜透射到所述虹膜成像模块中的虹膜二 向色镜, 由所述虹膜二向色镜透射到所述二向色镜和眼底镜, 由所述眼底镜入 射到被检人眼。
其中, 所述光程调节单元包括四个全反射镜, 其中二个全反射镜固定不动, 另外二个是可移动全反镜, 在实现光程调节时只需保持其中二个全反镜不动, 同时移动另外二个可移动全反射镜, 便能实现光程调节。
其中, 所述光程调节单元还包括二个全反射镜和一个可移动反向回射器, 在实现光程调节时只需要保持二个全反射镜不动, 同时通过移动所述可移动反 向回射器, 便能实现光程调节。
其中, 所述 Y方向扫描单元中的全反射镜采用振镜。
其中, 所述固视光学模块中的固视设备包括 LCD或 OLED。
其中, 所述光程调节单元的调节量是通过位置感应器获取得到, 所述位置 感应器是加装在所述光程调节单元中的可移动全反射镜或可移动反向回射器 上。
相应地, 本发明实施例还提供了一种快速切换实现眼前后节成像方法, 包 括:
当所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出 的光发射到所述全反射镜, 由所述全反射镜反射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Y方向扫描单元的转动而做相应的旋转调节 的光反射到所述二向色镜, 由所述二向色镜反射到所述眼底镜, 由所述眼底镜 入射到被检人眼。 当所述 Y方向扫描单元转动第二转动角度时, 将所述 X方向扫描单元发出 的光反射进入所述光程调节单元, 由所述光程调节单元反射透过所述屈光调节 单元照射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Υ方 向扫描单元的转动而做相应的旋转调节, 并和所述 Υ方向扫描单元相互配合将 所述照射在可旋转调节全反射镜的光反射到所述二向色镜, 由所述二向色镜反 射到所述眼底镜, 由所述眼底镜入射到被检人眼。
其中, 包括:
当系统在进行眼前节成像时, 获取所述眼前节成像中的光线从光纤发出后 到达测试者角膜所经过的光学距离, 所述光学距离为眼前节光路固有光程 +眼前 节 OCT图像中角膜顶端到图像顶端的距离 Α, 其中, 所述眼前节光路固有光程 是系统固有的参数,所述眼前节 OCT图像中角膜顶端到图像顶端的距离 A通过 对 OCT图像进行分析得到;
当系统在进行眼后节成像时, 获取所述眼后节成像中的光线从光纤发出后 到达测试者视网膜所经过的光学距离, 所述光学距离为眼后节光路固有光程 +光 程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B,其中,所述眼后 节光路是系统固有的参数, 所述眼后节 OCT图像中图像顶端到黄斑中心凹的距 离 B通过对 OCT图像进行分析得到;
计算所述眼前节成像时的光学距离和所述眼后节成像时的光学距离的差 值, 获取眼轴光学长度, 其中, 所述眼轴光学长度为: (眼后节光路固有光程 + 光程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B ) - (眼前节光 路固有光程 +眼前节 OCT图像中角膜顶端到图像顶端的距离 A )。
其中, 包括:
当系统在进行眼前节成像时, 采集所述眼前节成像光路中的角膜图像中的 角膜前表面, 并通过调节光程调节单元中可移动全反射镜或可移动反向回射器 来改变眼后节成像光路光程, 以便测量晶状体表面, 从而获取前房光学深度, 所述前房光学深度是所述角膜到所述晶状体前表面的距离, 其中, 所述角膜前 表面利用眼前节成像系统实现的, 所述晶状体前表面是利用目艮后节成像系统实 现的。
其中, 包括:
当系统在进行眼前节成像时, 采集所述眼前节成像光路中的角膜图像, 通 过调节光程调节单元中可移动全反射镜或可移动反向回射器来改变眼后节光路 光程, 以便让后节光路测量晶状体后表面, 获取所述角膜到所述晶状体后表面 的距离, 通过该距离减去所述前房光学深度, 得到所述晶状体的光学的厚度; 或
让所述眼前节光路扫描晶状体的前表面, 同时让所述眼后节光路采集晶状 体后表面, 得到晶状体的光学厚度, 所述晶状体的光学厚度是所述眼后节光路 采集到的晶状体后表面减去所述眼前节光路扫描到的晶状体前表面。
实施本发明, 可以实现在不同深度位置快速切换并实时成像, 一方面具有 快速切换功能,可实现对物体不同深度进行测量,提高了 OCT系统的探测范围, 切换系统稳定, 定位精确, 不影响系统信噪比; 另一方面能实现光束在不同位 置分别聚焦, 可针对不同视力的人眼实现高质量的前后节成像, 具有较高的横 向分辨率, 且在实现眼前后节成像的基础上, 增加实时测量眼轴长的功能。 附图说明
图 1 是本发明实施例提供的一种眼科光学相干断层成像系统的第一例结构 示意图;
图 2是本发明实施例提供的一种眼科光学相干断层成像系统中实现眼前节 成像模块的结构示意图;
图 3是本发明实施例提供的一种眼科光学相干断层成像系统中实现眼后节 成像模块的结构示意图;
图 4是本发明实施例提供的一种眼科光学相干断层成像系统中虹膜成像模 块的结构示意图;
图 5是本发明实施例提供的一种眼科光学相干断层成像系统中固视光学模 块的结构示意图;
图 6是本发明实施例提供的一种快速切换实现眼前后节成像的方法的示意 图;
图 7是本发明实施例提供的快速切换实现眼前后节成像的基础上测量眼轴 长的结构示意图;
图 8是本发明实施例提供的快速切换实现眼前后节成像的基础上测量眼轴 长的方法示意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1 是本发明实施例提供的一种眼科光学相干断层成像系统的第一例结构 示意图, 如图 1所示, 包括: 光学相干断层成像 OCT干涉仪主模块, 样品臂模 块, 其中, 所述 OCT干涉仪主模块包括 OCT光源 101、 光纤耦合器 102、 参考 臂 104、 探测模块 106、 X方向扫描单元 109、 Y方向扫描单元 110, 所述样品臂 模块包括眼前节成像模块、 目艮后节成像模块, 其中,
所述 OCT光 101源输出的光经过所述光纤耦合器 102向所述样品臂模块和 参考臂 104提供光,所述参考臂 104将接收到的光反射回到所述光纤耦合器 102 , 所述 X方向扫描单元 109接收所述 OCT光源 101输出的光, 所述 Y方向扫描 单元 110可转动, 当 Y方向扫描单元 110处于第一转动角度时, 将所述 X方向 扫描单元 109接收到的光反射进入眼前节成像模块, 当 Y扫描单元 110处于第 二转动角度时, 将所述 X方向扫描单元 109接收到的光反射进入眼后节成像模 块, 所述光纤耦合器 102接收所述样品臂模块散射回来的光, 并与所述参考臂 104的反射回来的光发生干涉, 所述探测模块 106用于探测所述干涉光, 并经过 所述计算机 107处理和显示。
具体的, 在本发明实施例中, 当所述 OCT光源 101为弱相干光源时, 所述 探测模块 106中的探测器为光语仪 (系统为频域 OCT ), 当所述 OCT光源 101 为扫频光源时, 所述探测器为高速光电探测器(系统为扫频 OCT ), 所述参考臂 104包括参考镜 105和准直镜 108, 其中, 所述参考臂 104通过所述参考镜 105 将接收到的所述 OCT光源 101输出的光反射回到所述光纤耦合器 102中, 所述 准直镜 108将所述 OCT光源 110输出的光发送到所述 X方向扫描单元 109 , 所 述 Y方向扫描单元 110可转动, 通过所述 Y方向扫描单元 110的转动, 将所述 X方向扫描单元 109发出的光路反射进入与转动角度对应的成像模块, 即当 Y 方向扫描单元 110处于第一转动角度时, 将所述 X方向扫描单元 109接收到的 光反射进入眼前节成像模块, 当 Y扫描单元 110处于第二转动角度时, 将所述 X方向扫描单元 109接收到的光反射进入眼后节成像模块, 所述 OCT干涉仪主 模块还包括偏振控制器 103 ,所述偏振控制器 103与所述光纤耦合器 102相连接 的, 用于接收所述样品臂模块反射回来的光, 并发送到所述光纤耦合器 102。
需要说明的是, 所述样品臂模块包括眼前节成像模块、 目艮后节成像模块, 其中, 所述眼前节成像模块包括: 全反射镜 202、 可转动调节全反射镜 401、 二 向色镜 402以及眼底镜 403 , 其中, 所述 Y方向扫描单元 110转动第一转动角 度时, 将所述 X方向扫描单元 109发出的光反射到所述全反射镜 202, 由所述 全反射镜 202反射到所述可旋转调节全反射镜 401 , 所述可旋转调节全反镜 401 是根据所述 Y方向扫描单元 110的转动而做相应的旋转调节的, 并和所述 Y方 向扫描单元 110相互配合实现将所述照射在可旋转调节全反射镜 401 的光反射 到所述二向色镜 402, 由所述二向色镜 402反射到所述眼底镜 403 , 由所述眼底 镜 403入射到被检人眼 E。
需要说明的是, 所述样品臂模块包括眼前节成像模块、 目艮后节成像模块, 其中, 所述眼后节成像模块除了包括所述眼前节成像模块中的可转动调节全反 射镜 401、 二向色镜 402及眼底镜 403外, 所述眼后节成像模块进一步包括: 光 程调节单元、 屈光调节单元 305、 所述 Y方向扫描单元 110转动第二转动角度 时, 将所述 X方向扫描单元 109发出的光反射进入所述光程调节单元中的第一 全反镜 301 , 并经过所述第二全反镜 302、 第三全反镜 303、 第四全反镜 304, 由所述光程调节单元反射透过所述屈光调节单元 305 到所述可旋转调节全反射 镜 401 , 所述可旋转调节全反镜 401根据所述 Y方向扫描单元 110的转动角度 而做相应的旋转, 并和所述 Y方向扫描单元 110相互配合实现将所述照射在可 旋转调节全反射镜 401的光反射到所述二向色镜 402,由所述二向色镜 402反射 到所述眼底镜 403 , 由所述眼底镜 403入射到被检人眼 E。
需要说明的是, 所述眼前节成像模块中的可转动调节全反射镜 401、二向色 镜 402及眼底镜 403和所述眼后节成像模块中的可转动调节全反射镜 401、二向 色镜 402及眼底镜 403是相同的。
需要说明的是, 所述眼科光学相干断层成像系统还包括虹膜成像模块, 其 中, 所述虹膜成像模块包括: 虹膜二向色镜 501、 物镜 502、 摄像器 503 , 当照 明光源发出的光照射到被检人眼的角膜, 并在角膜发生反射, 所述反射光透射 所述眼底镜 403和二向色镜 402到所述虹膜二向色镜 501 ,由所述虹膜二向色镜 501反射到所述物镜 502, 由所述物镜 502透射到所述摄像器 503 , 由所述摄像 器 503拍摄到。
需要说明的是, 所述眼科光学相干断层成像系统还包括固视光学模块, 其 中, 所述固视光学模块包括: 固视设备 601、 透镜 602、 全反射镜 603、 屈光补 偿镜 604, 所述固视设备 601的光路经过所述透镜 602聚焦之后,被所述全反射 镜 603反射到所述屈光补偿镜 604,由所述屈光补偿镜 604透射到所述虹膜二向 色镜 501 , 由所述虹膜二向色镜 501透射到所述二向色镜 402和眼底镜 403 , 由 所述眼底镜 403入射到被检人眼 E。
本发明实施例提供的一种眼科光学相干断层成像系统既能够实现眼后节成 像功能又能够实现眼前节成像功能, 通过所述 Y方向扫描单元 110和所述可转 动调节全反射镜 401相互配合, 即在转动所述 Y方向扫描单元 110的同时, 所 述可转动全反射镜 401 也做相应的旋转, 能够实现在不同深度位置上的快速准 确实时成像及前后节成像系统之间的切换, 且在实现眼前节和眼后节成像的基 础上, 增加实时测量眼轴长的功能。
图 2是本发明实施例提供的一种眼科光学相干断层成像系统中实现眼前节 成像模块的结构示意图,如图 2所示,所述眼前节成像模块包括:全反射镜 202、 可转动调节全反射镜 401、 二向色镜 402以及眼底镜 403 , 其中, 所述 Y方向扫 描单元 110转动第一转动角度时, 将所述 X方向扫描单元 109发出的光发射到 所述全反射镜 202 , 由所述全反射镜 202反射到所述可旋转调节全反射镜 401 , 所述可旋转调节全反镜 401是根据所述 Y方向扫描单元 110的转动而做相应的 旋转调节的, 并和所述 Y方向扫描单元 110相互配合实现将所述照射在可旋转 调节全反射镜 401的光反射到所述二向色镜 402 ,由所述二向色镜 402反射到所 述眼底镜 403 , 由所述眼底镜 403入射到被检人眼 E。
需要说明的是所述眼前节成像模块还包括至少一个中继透镜, 其中, 在所述 Y方向扫描单元 110和所述全反射镜 202之间至少有一个中继透镜, 此时, 所述 Y方向扫描单元 110转动第一转动角度时, 将所述 X方向扫描单元 109发出的光透过所述中继透镜发射到所述全反射镜 202; 或
在所述全反射镜 202和所述可旋转调节全反射镜 401之间至少有一个中继 透镜, 此时, 由所述全反射镜 202将所述 X方向扫描单元 109发出的光反射透 过所述中继透镜照射到所述可旋转调节全反射镜 401。 本发明实施例中所述眼前节成像光路中优选的是包括二个中继透镜, 即第 一中继透镜 201和第二中继透镜 203 ,其中所述第一中继透镜 201在所述全反射 镜 202和 Y方向扫描单元 110之间,所述第二中继透镜 203在所述全反射镜 202 和所述可旋转调节全反射镜 401之间, 此时, 所述 Y方向扫描单元 110转动第 一转动角度时, 将所述 X方向扫描单元 109发出的光透过第一中继透镜 201发 射到所述全反射镜 202 ,由所述全反射镜 202反射透过所述第二中继透镜 203照 射到所述可旋转调节全反射镜 401 ,再经过所述二向色镜 402反射到所述眼底镜 403 , 最后经过人眼 E会聚到眼底。
具体的, 本发明实施例中所述可旋转调节全反射镜 401与所述 Y方向扫描 单元 110同时被计算机控制, 通过计算机控制所述 Y方向扫描单元 110第一转 动角度, 此时所述 Y方向扫描单元 110所处的位置, 刚好使得入射光与反射光 的夹角为 β角, 同时计算机控制所述可旋转调节全反射镜 401根据所述 Υ方向 扫描单元 110的第一转动角度而进行相应的旋转,并和所述 Υ方向扫描单元 110 相互配合实现眼前节成像, 所述光束经过 Υ方向扫描单元 110透过第一中继透 镜 201发射到所述全反射镜 202,由所述全反射镜 202反射透过所述第二中继透 镜 203到所述可旋转调节全反射镜 401 ,再经过所述二向色镜 402反射到所述眼 底镜 403 , 最后经过人眼 Ε会聚到眼底。
需要说明的是, 本发明实施例中所述 Υ方向扫描单元 110不仅起到一维扫 描的作用, 也起到光路切换的作用, 本发明实施例中所述 Υ方向扫描单元 110 采用振镜或其他高精度定位机制, 便能满足系统光路快速切换的需求, 在测量 眼底时,通过所述 Υ方向扫描单元 110转动,让光路从所述 X方向扫描单元 109 反射到所述全反射镜 301 , 光线转动 α角; 当测角膜时, 旋转所述 Υ方向扫描 单元 110, 让光路从所述 X方向扫描单元 109反射到所述第一中继透镜 201 , 光 线转动 β角,其中,所述可旋转调节全反镜 401是根据所述 Υ方向扫描单元 110 的转动而做相应的旋转的, 所述 Υ方向扫描单元 110和所述可旋转调节全反射 镜 401镜片相互配合, 便能实现前后节光路的快速切换。
图 3是本发明实施例提供的一种眼科光学相干断层成像系统中实现眼后节 成像模块的结构示意图, 如图 3所示, 所述眼后节成像模块除了包括图 2中所 述眼前节成像模块中的可转动调节全反射镜 401、 二向色镜 402以及眼底镜 403 外, 所述眼后节成像模块还进一步包括: 屈光调节单元 305、 光程调节单元, 所 述 Y方向扫描单元 110转动第二转动角度时, 将所述 X方向扫描单元 109发出 的光路反射进入所述光程调节单元中第一全反镜 301 , 并经过所述第二全反镜 302、 第三全反镜 303、 第四全反镜 304, 由所述第四全反镜 304反射透过所述 屈光调节单元 305到所述可旋转调节全反射镜 401 , 所述可旋转调节全反镜 401 和所述 Υ方向扫描单元 110相互配合实现眼后节成像光路。
具体的, 本发明实施例中所述可旋转调节全反射镜 401与所述 Υ方向扫描 单元 110同时被计算机控制, 所述 Υ方向扫描单元 110在转动第二转动角度的 同时, 所述可旋转调节全反射镜 401 也做相应的旋转, 即所述可旋转调节全反 镜 401和所述 Υ方向扫描单元 110相互配合实现目艮后节的成像光路。 本发明实 施例通过计算机控制所述 Υ方向扫描单元 110第二转动角度, 此时所述 Υ方向 扫描单元 110所处的位置, 刚好使得入射光与反射光的夹角为 α角, 所述光束 经过 Υ方向扫描单元 110将所述 X方向扫描单元 109发出的光路反射进入所述 光程调节单元中第一全反镜 301 , 并经过所述第二全反镜 302、 第三全反镜 303、 第四全反镜 304,由所述第四全反镜 304反射透过所述屈光调节单元 305到所述 可旋转调节全反射镜 401 , 再经过所述二向色镜 402反射到所述眼底镜 403 , 即 目艮底 OCT成像时要求扫描振镜不动时 OCT光束汇聚于眼底, 所述振镜扫描时, 扫描光束的中心光束汇聚于瞳孔。
需要说明的是, 在测眼底时, 由于不同人眼的眼轴长不同, 但所述 OCT成 像模块中的参考臂 104是不可调节的, 因此在所述眼后节成像模块中的眼底光 路中必须有光程调节单元, 若光程调节机制是在光程调节单元中的二维振镜之 前, 例如采用步进电机前后移动来改变光程或者采用其他方式, 但前后节切换 时, 需要机械系统运动来改变光程, 这会引入多普勒效应, 从而降低系统的信 噪比, 为解决这个问题, 本发明在光程调节单元中的二维振镜后的眼底光路中 添加光程调节单元, 所述光程调节单元包括四个全反射镜, 其中二个全反射镜 固定不动, 另外二个是可移动全反镜, 即第一全反镜 301、 第四全反镜 304是固 定不动的, 第二全反镜 302、 第三全反镜 303是可移动的全反射镜, 在实现光程 调节时只需保持其中二个全反镜不动, 即保持所述第一全反镜 301、 第四全反镜 304固定不动, 同时移动另外二个可移动全反射镜,即移动所述第二全反镜 302、 第三全反镜 303 , 便能实现光程调节, 以便对于不同人眼, 通过调节所述可移动 全反射镜, 即所述第二全反射镜 302和第三全反镜 303 , 定好前后节的光程差, 这样进行快速切换时, 不会引入多普勒频移。
另外, 本发明实施例中所述光程调节单元还包括二个全反射镜和一个可移 动反向回射器, 在实现光程调节时只需要保持二个全反射镜不动, 同时通过移 动所述可移动反向回射器, 便能实现光程调节。
图 4是本发明实施例提供的一种眼科光学相干断层成像系统中虹膜成像模 块的结构示意图, 如图 4所示, 所述虹膜成像模块包括: 目艮底镜 403、 二向色镜 402、 虹膜二向色镜 501、 物镜 502、 摄像器 503 , 当照明光源发出的光照射到被 检人眼 E的角膜, 并在角膜发生反射, 所述反射光透射所述眼底镜 403和二向 色镜 402到所述虹膜二向色镜 501 , 由所述虹膜二向色镜 501反射到所述物镜 502, 由所述物镜 502透射到所述摄像器 503 , 由所述摄像器 503拍摄到。
具体的, 本发明实施例中所述虹膜成像模块中的监视光路指导医生操作仪 器和了解被测者的相关信息, 检测者使用下颚托系统使被检眼固定, 使来自固 视光学模块中的固视标固视在被检眼 E中后,检测者一边通过观察所述 OCT干 涉仪主模块中的计算机 107的显示屏, 一边通过操作杆控制下颚托系统的移动, 以使被检眼 E的角膜进入所述虹膜成像模块的摄像器 503中, 并且角膜像呈现 在所述 OCT干涉仪主模块中的计算机 107的显示屏中, 以便指导医生操作仪器 和了解被测人眼 E的相关信息。
需要说明的是, 所述虹膜二向色镜 501 不仅仅可对来自虹膜成像模块中的 照明光源发出的照明光进行反射,而且可对所述固视光学模块中的固视设备 601 发出的固视光进行透射。
需要说明的是, 所述照明光源发出的光可以波长为 780nm的近红外光。 图 5是本发明实施例提供的一种眼科光学相干断层成像系统中固视光学模 块的结构示意图, 如图 5 所示, 所述固视光学模块包括: 固视设备 601、 透镜 602、 全反射镜 603、 屈光补偿镜 604、 二向色镜 402、 目艮底镜 403 , 所述固视设 备 601的光路经过所述透镜 602聚焦之后, 被所述全反射镜 603反射到所述屈 光补偿镜 604,由所述屈光补偿镜 604透射到所述虹膜成像模块中的虹膜二向色 镜 501 , 由所述虹膜二向色镜 501透射到所述二向色镜 402和眼底镜 403 , 由所 述眼底镜 403入射到被检人眼 E。
具体的, 在本发明实施例中可以使用其内部固视标来变更被检眼 E的固视 位置, 所述内部固视标可以上下左右移动, 以此来满足检测人眼不同位置, 其 中在进行眼后节 OCT成像时, 所述眼后节成像模块中的屈光调节单元 305与所 述固视光学模块中的屈光补偿镜 604 , 由计算机同时控制移动。
若固视点固定不动, 不同人眼观察时, 固视点的清晰程度不同, 这给被测 者固视时造成不舒适, 因此所述眼后节成像模块的 OCT光路经过所述屈光调节 单元 305调屈后, 能聚焦于眼底视网膜上, 使人眼能看清晰扫描线。
本发明实施中为了实现对于不同人眼都能看清晰扫描线, 通过所述固视光 学中的屈光补偿镜 604在固视点中引入了调屈机制, 就是为了能实现对于不同 人眼都能看清, 但在眼后节成像模块中的屈光调节单元 305后加入固视光路, 则会影响眼后节成像模块的 OCT光路, 所述固视点不能随所述光程调节单元中 的四个全反射镜一起移动, 因此所述固视光路必然在所述光程调节单元中的四 个全反射镜前, 本发明实施例通过计算机控制实现所述眼后节成像模块中的屈 光调节单元 305与所述固视光学模块中的屈光补偿镜 604同时移动, 实现所述 屈光调节单元 305与所述屈光补偿镜 604联动机制, 通过计算机控制实现所述 眼后节成像模块中的屈光调节单元 305与所述固视光学模块中的屈光补偿镜 604 一起移动, 既可以实现人眼固视, 又不影响目艮后节成像模块的 OCT光路。
需要说明的是, 所述固视光学模块中的固视设备 601 发出的固视光包括波 长是 550nm的可见光。
需要说明的是, 所述固定光学模块中的固视设备 601包括 LCD或 OLCD。 图 6是本发明实施例提供的一种快速切换实现眼前后节成像的方法的示意 图, 如图 6所示, 所述方法包括:
S101 , 当所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单 元发出的光发射到所述全反射镜, 由所述全反射镜反射到所述可旋转调节全反 射镜, 所述可旋转调节全反镜是根据所述 Y方向扫描单元的转动而做相应的旋 转调节的, 并和所述方向扫描单元相互配合实现将所述照射在所述可旋转调节 全反射镜的光反射到所述二向色镜, 由所述二向色镜反射到所述眼底镜, 由所 述眼底镜入射到被检人眼 E。
具体的, 本发明实施例中所述可旋转调节全反射镜 401与所述 Y方向扫描 单元 110同时被计算机控制, 通过计算机控制所述 Y方向扫描单元 110第一转 动角度, 此时所述 Y方向扫描单元 110所处的位置, 刚好使得入射光与反射光 的夹角为 β角, 同时计算机控制所述可旋转调节全反射镜 401根据所述 Υ方向 扫描单元 110的第一转动角度而进行相应的旋转,并和所述 Y方向扫描单元 110 相互配合实现眼前节成像, 通过旋转所述 Y方向扫描单元 110, 让光路经过 Y 方向扫描单元 110透过第一中继透镜 201发射到所述全反射镜 202,由所述全反 射镜 202反射透过所述第二中继透镜 203到所述可旋转调节全反射镜 401 ,再经 过所述二向色镜 402反射到所述眼底镜 403 , 最后经过人眼 E会聚到目艮底。
S102, 当所述 Y方向扫描单元转动第二转动角度时, 将所述 X方向扫描单 元发出的光反射进入所述光程调节单元, 并由所述光程调节单元反射透过所述 屈光调节单元照射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据 所述 Y方向扫描单元的转动而做相应的旋转调节, 并和所述 Y方向扫描单元相 互配合将所述照射在可旋转调节全反射镜的光反射到所述二向色镜, 由所述二 向色镜反射到所述眼底镜, 由所述眼底镜入射到被检人眼。
具体的, 本发明实施例中所述可旋转调节全反射镜 401与所述 Y方向扫描 单元 110同时被计算机控制, 通过计算机控制所述 Y方向扫描单元 110第二转 动角度, 此时所述 Y方向扫描单元 110所处的位置, 刚好使得入射光与反射光 的夹角为 α角,在进行眼后节成像时要求扫描振镜不动时 OCT光束汇聚于眼底, 所述 Y方向扫描单元 110将所述 X方向扫描单元 109发出的光路反射进入所述 光程调节单元, 由所述光程调节单元反射透过所述屈光调节单元 305到所述可 旋转调节全反射镜 401 , 所述可旋转调节全反镜 401是根据所述 Y方向扫描单 元 110的转动的第二角度而做相应的旋转, 并和所述 Y方向扫描单元 110相互 配合实现眼后节成像, 将所述照射在可旋转调节全反射镜 401 的光反射到所述 二向色镜 402, 由所述二向色镜 402反射到所述眼底镜 403 , 最后经过人眼 E会 聚到人眼瞳孔
本发明实施例通过所述 Y方向扫描单元 110和所述可旋转调节全反射镜 401 相互配合, 实现前后节光路的切换。
图 7是本发明实施例提供的快速切换实现眼前后节成像的基础上测量眼轴 长的结构示意图, 所述图 7包括: 眼前节 OCT图像中角膜顶端 、 眼前节图像 顶端 D、 眼前节 OCT图像中角膜顶端到图像顶端的距离 A、 目艮后节 OCT图像 中图像顶端 E、 目艮后节 OCT图像黄斑中心凹 I、 目艮后节 OCT图像中图像顶端到 黄斑中心凹的距离 B。
具体的, 本发明实施例通过让所述可移动全反射镜 302、 303复位, 实现光 路前后节快速切换, 让被测物体前后移动, 使得物体的 OCT信号处于前后节 OCT 图像中相同的位置即所述干涉面到图像顶端的距离相同, 通过测量物体前 后移动量, 便能定标测得所述眼前后节的固定光程差 CO的值, 同时上下移动所 述可移动全反射镜 302与 303 , 找到人眼视网膜的 OCT图像, 对眼前后节快速 成像后, 得到所述眼前后节成像的 OCT图像, 其中所述可移动全反射镜 302与 303的移动量为 X, 分别用于测量眼前节 OCT图像中角膜顶端到图像顶端的距 离 A以及眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B, 其中, 所述眼前 节 OCT图像中角膜顶端到图像顶端的距离 A通过对 OCT图像进行分析得到, 所述眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B通过对 OCT图像进行 分析得到, 因此所述眼前后节的光程差 C= C0 ± 2X, 其中 "士" 是根据所述可移 动全反射镜 302、 303向上或向下移动决定, 所述 C0是眼前后节的固定光程差, 最后, 人眼轴光学长度1^=:6+ -入, 即所述眼轴光学长度 =眼后节 OCT图像中图 像顶端到黄斑中心凹的距离 B+眼前后节的光程差 C-前节 OCT图像中角膜顶端 到图像顶端的距离 A。
本发明实施例是在实现眼前节和眼后节成像的基础上实现测量眼轴长, 所 述眼轴光学长度 L=B+C-A, 即所述眼轴光学长度 =眼后节 OCT图像中图像顶端 到黄斑中心 的距离 B+眼前后节的光程差 C-前节 OCT图像中角膜顶端到图像 顶端的距离 A。
图 8是本发明实施例提供的快速切换实现眼前后节成像的基础上测量眼轴 长的方法示意图, 所述测量眼轴长的方法包括:
S201 , 当系统在进行眼前节成像时, 获取所述眼前节成像中的光线从光纤 发出后到达测试者角膜所经过的光学距离, 所述光学距离为眼前节光路固有光 程 +眼前节 OCT图像中角膜顶端到图像顶端的距离 A, 其中, 所述眼前节光路 固有光程是系统固有的参数, 所述眼前节 OCT图像中角膜顶端到图像顶端的距 离 A通过对 OCT图像进行分析得到;
具体的, 本发明实施例中的系统处于眼前节成像时, 所述可旋转调节全反 镜 401是根据所述 Y方向扫描单元 110的转动的第一角度而做相应的旋转, 并 和所述 Y方向扫描单元 110相互配合实现眼前节成像, 所述光束经过 Y方向扫 描单元 110透过第一中继透镜 201发射到所述全反射镜 202, 由所述全反射镜 202反射透过所述第二中继透镜 203到所述可旋转调节全反射镜 401 , 再经过所 述二向色镜 402反射到所述眼底镜 403 , 最后经过人眼 E, 所述光线从光纤发出 后到达测试者角膜所经过的光学距离为眼前节光路固有光程 +眼前节 OCT 图像 中角膜顶端到图像顶端的距离 A, 其中, 所述眼前节光路固有光程是系统固有 的参数, 所述眼前节 OCT图像中角膜顶端到图像顶端的距离 A通过对 OCT图 像进行分析得到, 本发明实施例中系统处于眼前节成像时, 所述眼前节成像光 路的等干涉面的位置为图 8中的 F。
5202 , 当系统在进行眼后节成像时, 获取所述眼后节成像中的光线从光纤 发出后到达测试者视网膜所经过的光学距离, 所述光学距离为眼后节光路固有 光程 +光程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B , 其中, 所述眼后节光路是系统固有的参数, 所述眼后节 OCT图像中图像顶端到黄斑中 心凹的距离 B通过对 OCT图像进行分析得到;
具体的, 本发明实施例中的系统处于眼后节成像时, 所述 Y方向扫描单元 110将所述 X方向扫描单元 109发出的光路反射进入所述光程调节单元, 由所 述光程调节单元反射透过所述屈光调节单元 305 到所述可旋转调节全反射镜 401 , 再经过所述二向色镜 402反射到所述眼底镜 403 , 最后经过人眼 E会聚到 人眼瞳孔, 所述光线从光纤发出后到达测试者视网膜所经过的光学距离为眼后 节光路固有光程 +光程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B , 其中所述眼后节光路是系统固有的参数, 所述眼后节 OCT图像中图像顶端 到黄斑中心凹的距离 B通过对 OCT图像进行分析得到,所述眼后节成像光路的 等干涉面的位置为图 8中的 G, 所述眼底光路的等干涉面移动的位置为图 8中 的 H。
5203 , 计算所述眼前节成像时的光学距离和所述眼后节成像时的光学距离 的差值, 获取被测眼轴光学长度, 其中, 所述眼轴光学长度为: (眼后节光路固 有光程 +光程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B ) - (眼 前节光路固有光程 +眼前节 OCT图像中角膜顶端到图像顶端的距离 A ), 根据所 述获取到的眼轴光学长度, 可以得到所述眼轴长, 即所述眼轴长 =眼轴光学长度 /眼球的折射率。
具体的, 本发明实施例中, 当所述光程调节单元中的可移动全反射镜 302 和 303处于起始位置时, 目艮底光路的等干涉面 (图 8中 G所示位置)与前节光 路的等干涉面(图 8中 F所示位置)之间的光程差为 C0 , 其距离可以通过定标 测量出, 由于人眼眼轴长不同, 在进行眼底 OCT成像时, 所述眼底成像中的光 路等干涉面处于图 8中 G所示位置, 通过同时对所述可移动全反射镜 302、 303 的上下移动来实现不同人眼轴长的眼底成像, 当所述全反射镜 302与 303 同时 一起向下移动距离 X时, 则此时所述眼底成像的光路等干涉面位置从 306变为 307, 变 4匕的 巨离为 2X。
本发明实施例是在实现眼前节和眼后节成像的基础上实现测量眼轴长, 所 述测量眼轴长具体操作步骤: 先让所述可移动全反射镜 302、 303复位, 此时眼 前后节的固定光程差为 CO, 其中, 所述眼前后节的固定光程差 CO是根据定标 得到, 也就是通过让所述可移动全反射镜 302、 303复位, 实现光路前后节快速 切换, 让被测物体前后移动, 使得物体的 OCT信号处于前后节 OCT图像中相 同的位置即所述干涉面到图像顶端的距离相同, 通过测量物体前后移动量, 便 能定标测得所述眼前后节的固定光程差 C0的值,接着让角膜处在图 8中 F所示 位置, 同时上下移动所述可移动全反射镜 302与 303 , 找到人眼视网膜的 OCT 图像, 对眼前后节快速成像后, 得到所述眼前后节成像的 OCT图像, 其中所述 可移动全反射镜 302与 303的移动量为 X, 分别用于测量眼前节 OCT图像中角 膜顶端到图像顶端的距离 A以及眼后节 OCT图像中图像顶端到黄斑中心凹的距 离 B, 因此所述眼前后节的光程差 C= C0 ± 2X, 其中 "士" 是根据所述可移动全 反射镜 302、 303向上或向下移动决定, 所述 C0是眼前后节的固定光程差, 最 后, 人眼轴光学长度1^=:6+ -入, 即所述眼轴光学长度 =眼后节 OCT图像中图像 顶端到黄斑中心凹的距离 B+眼前后节的光程差 C-前节 OCT图像中角膜顶端到 图像顶端的距离 A。
需要说明的是, 本发明实施例中提供的一种眼科光学相干断层成像系统也 可以用于前房深度的测量, 所述测量前房深度的方法与所述测量眼轴长的原理 相同, 当系统在进行前节成像时, 采集所述前节成像光路中的角膜图像中的角 膜前表面,并通过调节光程调节单元中的可移动全反射镜,即第二全反射镜 302、 第三全反射镜 303 或者可移动反向回射器, 来改变眼后节成像光路光程, 便能 实现让后节光路测量晶状体表面, 从而获取前房光学深度, 所述前房光学深度 是所述角膜到所述晶状体前表面的距离, 其中, 所述角膜前表面利用眼前节成 像系统实现的, 所述晶状体前表面是利用目艮后节成像系统实现的。
根据所述获取到的前房光学深度, 可以得到所述前房深度, 其中所述前房 深度 =前房光学深度 /前房折射率。
需要说明的是, 本发明实施例中提供的一种眼科光学相干断层成像系统也 可以用于晶状体厚度的测量, 当系统在进行前节成像时, 采集所述前节成像光 路中的角膜图像, 通过调节光程调节单元中的全反射镜或者反向回射器, 来改 变眼后节光路光程, 以便让后节光路测量晶体状的后表面, 获取所述角膜到所 述晶体状后表面的距离, 通过该距离减去所述前房光学深度, 得到所述晶体状 的光学厚度; 或
让所述前节光路扫描体晶体状的前表面, 同时让所述后节光路采集晶体状 后表面, 直接得到晶体状的光学厚度, 所述晶体状的光学厚度是所述后节光路 采集到的晶体状的后表面减去所述前节光路扫描到的晶体状的前表面。
根据所述的晶状体的光学厚度, 可以得到所述晶状体厚度, 其中所述晶体状 厚度 =晶状体的光学厚度 /晶状体的折射率。
需要说明的是, 在所述前后节光路中为测晶状体前后表面, 可以在前后节 光路中任意一路或两路插入镜片, 来改变光路聚集点的位置, 使得光路聚焦点 恰好处于晶状体前后表面上。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程, 是可以通过计算机程序来指令相关的硬件来完成, 所述的程序可存储于一计算 机可读取存储介质中, 该程序在执行时, 可包括如上述各方法的实施例的流程。 其中, 所述的存储介质可为磁碟、 光盘、 只读存储记忆体(Read-Only Memory, ROM )或随机存储记忆体(Random Access Memory, RAM )等。
以上所揭露的仅为本发明较佳实施例而已, 当然不能以此来限定本发明之 权利范围, 本领域普通技术人员可以理解实现上述实施例的全部或部分流程, 并依本发明权利要求所作的等同变化, 仍属于发明所涵盖的范围。

Claims

权 利 要 求
1、 一种眼科光学相干断层成像系统, 其特征在于, 包括: 光学相干断层成 像 OCT干涉仪主模块, 样品臂模块, 其中, 所述 OCT干涉仪主模块包括 OCT 光源、 光纤耦合器、 参考臂、 探测模块、 X方向扫描单元、 Y 方向扫描单元, 所述样品臂模块包括眼前节成像模块、 目艮后节成像模块, 其中,
所述 OCT光源输出的光经过所述光纤耦合器向所述样品臂模块和参考臂提 供光, 所述参考臂将接收到的光反射回到所述光纤耦合器, 所述 Y方向扫描单 元可转动, 当 Y方向扫描单元处于第一转动角度时, 将所述 X方向扫描单元接 收到的光反射进入眼前节成像模块, 当 Y扫描单元处于第二转动角度时, 将所 述 X方向扫描单元接收到的光反射进入眼后节成像模块, 所述光纤耦合器接收 所述样品臂模块散射回来的光, 并与所述参考臂的反射回来的光发生干涉, 所 述探测模块用于探测所述干涉光。
2、 如权利要求 1所述的系统, 其特征在于, 所述眼前节成像模块包括: 全 反射镜、 可转动调节全反射镜、 二向色镜及眼底镜, 其中,
所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出的 光发射到所述全反射镜, 由所述全反射镜反射到所述可旋转调节全反射镜, 所 述可旋转调节全反镜是根据所述 Y 方向扫描单元的转动而做相应的旋转调节 的, 并和所述 Y方向扫描单元相互配合实现将所述照射在可旋转调节全反射镜 的光反射到所述二向色镜, 由所述二向色镜反射到所述眼底镜, 由所述眼底镜 入射到被检人眼。
3、 如权利要求 2所述的系统, 其特征在于, 所述眼前节成像模块还包括至 少一个中继透镜, 其中,
在所述 Y方向扫描单元和所述全反射镜之间至少有一个中继透镜, 此时, 所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出的光透 过所述中继透镜发射到所述全反射镜; 或
在所述全反射镜和所述可旋转调节全反射镜之间至少有一个中继透镜, 此 时, 由所述全反射镜将所述 X方向扫描单元发出的光反射透过所述中继透镜照 射到所述可旋转调节全反射镜。
4、 如权利要求 1所述的系统, 其特征在于, 所述眼后节成像模块包括: 光 程调节单元、 屈光调节单元、 可转动调节全反射镜、 二向色镜及眼底镜, 其中, 所述 Y方向扫描单元转动第二转动角度时, 将所述 X方向扫描单元发出的 光反射进入所述光程调节单元, 由所述光程调节单元反射透过所述屈光调节单 元照射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Y方向 扫描单元的转动而做相应的旋转调节, 并和所述 Y方向扫描单元相互配合将所 述照射在可旋转调节全反射镜的光反射到所述二向色镜, 由所述二向色镜反射 到所述眼底镜, 由所述眼底镜入射到被检人眼。
5、 如权利要求 1所述的系统, 其特征在于, 还包括: 虹膜成像模块, 其中, 所述虹膜成像模块包括: 目艮底镜、 二向色镜、 虹膜二向色镜、 物镜、 摄像 器, 照明光源发出的光照射到被检人眼的角膜, 并在角膜发生反射, 所述反射 光透射所述眼底镜和二向色镜到所述虹膜二向色镜, 由所述二向色镜反射到所 述物镜, 由所述物镜透射到所述摄像器, 由所述摄像器拍摄到。
6、 如权利要求 1所述的系统, 其特征在于, 还包括: 固视光学模块, 其中, 所述固视光学模块包括: 固视设备、 透镜、 全反射镜、 屈光补偿镜、 二向 色镜、 目艮底镜, 所述固视设备的光经过所述透镜聚焦之后, 被所述全反射镜反 射到所述屈光补偿镜, 由所述屈光补偿镜透射到所述虹膜成像模块中的虹膜二 向色镜, 由所述虹膜二向色镜透射到所述二向色镜和眼底镜, 由所述眼底镜入 射到被检人眼。
7、 如权利要求 4所述的系统, 其特征在于, 所述光程调节单元包括四个全 反射镜, 其中二个全反射镜固定不动, 另外二个是可移动全反镜, 在实现光程 调节时只需保持其中二个全反镜不动, 同时移动另外二个可移动全反射镜, 便 能实现光程调节。
8、 如权利要求 4所述的系统, 其特征在于, 所述光程调节单元还包括二个 全反射镜和一个可移动反向回射器, 在实现光程调节时只需要保持二个全反射 镜不动, 同时通过移动所述可移动反向回射器, 便能实现光程调节。
9、 如权利要求 1至 4中任一项系统, 其特征在于, 所述 Y方向扫描单元中 的全反射镜采用振镜。
10、 如权利要求 6所述的系统, 其特征在于, 所述固视光学模块中的固视 设备包括 LCD或 OLED。
11、 如权利要求 7或 8所述的系统, 其特征在于, 所述光程调节单元的调 节量是通过位置感应器获取得到, 所述位置感应器是加装在所述光程调节单元 中的可移动全反射镜或可移动反向回射器上。
12、 一种快速切换实现眼前后节成像的方法, 其特征在于, 包括: 当所述 Y方向扫描单元转动第一转动角度时, 将所述 X方向扫描单元发出 的光发射到所述全反射镜, 由所述全反射镜反射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Y方向扫描单元的转动而做相应的旋转调节 的, 并和所述 Y方向扫描单元相互配合实现将所述照射在可旋转调节全反射镜 的光反射到所述二向色镜, 由所述二向色镜反射到所述眼底镜, 由所述眼底镜 入射到被检人眼。
当所述 Y方向扫描单元转动第二转动角度时, 将所述 X方向扫描单元发出 的光反射进入所述光程调节单元, 由所述光程调节单元反射透过所述屈光调节 单元照射到所述可旋转调节全反射镜, 所述可旋转调节全反镜是根据所述 Y方 向扫描单元的转动而做相应的旋转调节, 并和所述 Y方向扫描单元相互配合将 所述照射在可旋转调节全反射镜的光反射到所述二向色镜, 由所述二向色镜反 射到所述眼底镜, 由所述眼底镜入射到被检人眼。
13、 如权利要求 12所述的方法, 其特征在于, 包括:
当系统在进行眼前节成像时, 获取所述眼前节成像中的光线从光纤发出后 到达测试者角膜所经过的光学距离, 所述光学距离为眼前节光路固有光程 +眼前 节 OCT图像中角膜顶端到图像顶端的距离 A, 其中, 所述眼前节光路固有光程 是系统固有的参数,所述眼前节 OCT图像中角膜顶端到图像顶端的距离 A通过 对 OCT图像进行分析得到;
当系统在进行眼后节成像时, 获取所述眼后节成像中的光线从光纤发出后 到达测试者视网膜所经过的光学距离, 所述光学距离为眼后节光路固有光程 +光 程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B,其中,所述眼后 节光路是系统固有的参数, 所述眼后节 OCT图像中图像顶端到黄斑中心凹的距 离 B通过对 OCT图像进行分析得到;
计算所述眼前节成像时的光学距离和所述眼后节成像时的光学距离的差 值, 获取眼轴光学长度, 其中, 所述眼轴光学长度为: (眼后节光路固有光程 + 光程调节量 +眼后节 OCT图像中图像顶端到黄斑中心凹的距离 B ) _ (眼前节光 路固有光程 +眼前节 OCT图像中角膜顶端到图像顶端的距离 A )。
14、 如权利要求 12所述的方法, 其特征在于, 包括:
当系统在进行眼前节成像时, 采集所述眼前节成像光路中的角膜图像中的 角膜前表面, 并通过调节光程调节单元中可移动全反射镜或可移动反向回射器 来改变眼后节成像光路光程, 以便测量晶状体表面, 从而获取前房光学深度, 所述前房光学深度是所述角膜到所述晶状体前表面的距离, 其中, 所述角膜前 表面利用眼前节成像系统实现的, 所述晶状体前表面是利用目艮后节成像系统实 现的。
15、 如权利要求 12所述的方法, 其特征在于, 包括:
当系统在进行眼前节成像时, 采集所述眼前节成像光路中的角膜图像, 通 过调节光程调节单元中可移动全反射镜或可移动反向回射器来改变眼后节光路 光程, 以便让后节光路测量晶状体后表面, 获取所述角膜到所述晶状体后表面 的距离, 通过该距离减去所述前房光学深度, 得到所述晶状体的光学厚度; 或 让所述眼前节光路扫描晶状体的前表面, 同时让所述眼后节光路采集晶状 体后表面, 得到晶状体的光学厚度, 所述晶状体的光学厚度是所述眼后节光路 采集到的晶状体后表面减去所述眼前节光路扫描到的晶状体前表面。
PCT/CN2012/074577 2012-04-24 2012-04-24 眼科光学相干断层成像系统及快速切换实现前后节成像方法 WO2013159280A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12875405.8A EP2767220B1 (en) 2012-04-24 2012-04-24 Ophthalmic optical coherence tomography system and imaging method for quick switching to realize anterior and posterior eye segments imaging
CN201290000031.1U CN203643682U (zh) 2012-04-24 2012-04-24 一种眼科光学相干断层成像系统
PCT/CN2012/074577 WO2013159280A1 (zh) 2012-04-24 2012-04-24 眼科光学相干断层成像系统及快速切换实现前后节成像方法
US14/124,030 US9370300B2 (en) 2012-04-24 2012-04-24 Ophthalmic optical coherence tomography system and method for quick switching to realize anterior and posterior eye segments imaging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/074577 WO2013159280A1 (zh) 2012-04-24 2012-04-24 眼科光学相干断层成像系统及快速切换实现前后节成像方法

Publications (1)

Publication Number Publication Date
WO2013159280A1 true WO2013159280A1 (zh) 2013-10-31

Family

ID=49482111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/074577 WO2013159280A1 (zh) 2012-04-24 2012-04-24 眼科光学相干断层成像系统及快速切换实现前后节成像方法

Country Status (4)

Country Link
US (1) US9370300B2 (zh)
EP (1) EP2767220B1 (zh)
CN (1) CN203643682U (zh)
WO (1) WO2013159280A1 (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103892791A (zh) * 2014-04-04 2014-07-02 深圳市斯尔顿科技有限公司 眼科测量装置和方法
CN103976707A (zh) * 2014-05-20 2014-08-13 深圳市斯尔顿科技有限公司 一种测量眼轴光程值的oct系统及方法
CN103976708A (zh) * 2014-05-20 2014-08-13 深圳市莫廷影像技术有限公司 角膜顶点对准方法和系统及眼轴光程长度测量方法和系统
CN103989453A (zh) * 2014-06-03 2014-08-20 深圳市莫廷影像技术有限公司 一种多功能眼科测量装置及测试人眼不同部位的方法
CN110522406A (zh) * 2019-08-16 2019-12-03 广州浩康生物科技有限公司 一种眼轴长度测量装置及眼轴长度测量方法
CN110916611A (zh) * 2018-09-18 2020-03-27 株式会社拓普康 眼科装置及其控制方法、程序和存储介质
CN113499032A (zh) * 2021-09-13 2021-10-15 中港大富科技(深圳)有限公司 一种多维检测仪
CN113520298A (zh) * 2021-06-15 2021-10-22 上海应用技术大学 一种眼前后节一体光学相干断层结构/功能成像系统

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104068825B (zh) * 2014-06-24 2015-11-11 东北大学 一种短相干光干涉测量方法及装置
CA2957355A1 (en) * 2014-09-02 2016-03-10 Costruzioni Strumenti Oftalmici C.S.O. S.R.L. An optical coherence tomography system and method
CN104224109B (zh) * 2014-10-16 2016-06-08 深圳市斯尔顿科技有限公司 一种结合oct系统的眼底相机
JP6805539B2 (ja) 2015-05-01 2020-12-23 株式会社ニデック 眼科撮像装置
CN104905763B (zh) * 2015-06-18 2017-12-19 苏州四海通仪器有限公司 可测量旁中心离焦的验光装置
CN105147240B (zh) * 2015-09-18 2016-08-17 深圳市斯尔顿科技有限公司 一种眼科光学相干扫描成像装置
US10694939B2 (en) * 2016-04-29 2020-06-30 Duke University Whole eye optical coherence tomography(OCT) imaging systems and related methods
JP7010943B2 (ja) * 2016-11-30 2022-01-26 アルコン インコーポレイティド 最適化された光干渉断層撮影のための可視化システム及び方法
WO2018119009A1 (en) * 2016-12-19 2018-06-28 Visunex Medical Systems Co. Ltd. An ultra-wide field of view optical coherence tomography imaging system
CN106725287B (zh) * 2017-02-15 2018-11-09 佛山市同视科技有限公司 一种眼睛生物参数的非接触测量设备及方法
JP7194177B2 (ja) * 2017-10-02 2022-12-21 アルコン インコーポレイティド 前区における光学収差を測定するための位相感応光コヒーレンストモグラフィ
CN107692977B (zh) * 2017-10-31 2024-03-01 天津恒宇医疗科技有限公司 一种基于oct的双模式光学微造影成像系统
JP6935725B2 (ja) * 2017-10-31 2021-09-15 株式会社ニデック 眼科撮影装置
CN109171639B (zh) * 2018-09-04 2023-10-20 温州医科大学 一种基于光学相干层析成像技术的在体角膜参数的测量装置及测量方法
JP7323148B2 (ja) * 2018-09-28 2023-08-08 株式会社トーメーコーポレーション 眼科装置
WO2020123842A1 (en) * 2018-12-12 2020-06-18 Drake Precision Optics, Inc. Ophthalmic surgery laser system and method for utilizing same for ophthalmic surgery
CN109691972A (zh) * 2018-12-29 2019-04-30 佛山科学技术学院 角膜表面光程差测量装置及测量角膜厚度和折射率的方法
CN109998471A (zh) * 2019-01-28 2019-07-12 执鼎医疗科技(杭州)有限公司 一种参考臂固定的oct系统
CN111557637A (zh) * 2019-02-13 2020-08-21 深圳市斯尔顿科技有限公司 眼科测量系统
CN110192839A (zh) * 2019-05-21 2019-09-03 北京清华长庚医院 一种旋转侧扫式oct眼球内窥镜结构
CN110215183B (zh) * 2019-05-21 2021-09-28 深圳市斯尔顿科技有限公司 固视光学装置、眼科测量系统及成像方法
JP6766242B2 (ja) * 2019-10-23 2020-10-07 株式会社トプコン 眼科装置
CN112155512A (zh) * 2020-09-30 2021-01-01 广东唯仁医疗科技有限公司 一种光学相干断层成像设备及其控制方法
CN112244756B (zh) * 2020-10-19 2024-03-15 深圳市斯尔顿科技有限公司 一种多功能眼科全自动测量方法及系统
CN112244757B (zh) * 2020-10-19 2024-01-16 深圳市斯尔顿科技有限公司 一种眼科测量系统和方法
CN112168132B (zh) * 2020-11-09 2022-11-08 苏州大学 一种使用oct信号进行眼底屈光补偿判定与成像优化的方法
CN112617760B (zh) * 2020-12-31 2023-05-30 佛山科学技术学院 一种基于3d打印技术的多模态手持式oct系统
US20220287559A1 (en) * 2021-03-13 2022-09-15 Optos Plc Optical coherence tomography instrument and alignment method
CN113229777B (zh) * 2021-04-07 2022-09-23 上海美沃精密仪器股份有限公司 一种视觉质量分析仪
US11963722B2 (en) 2021-04-13 2024-04-23 Amo Development, Llc Methods and systems for determining change in eye position between successive eye measurements
CN113509142B (zh) * 2021-06-07 2023-06-02 天津市索维电子技术有限公司 一种大视野视网膜检查装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1181784C (zh) * 2002-06-14 2004-12-29 清华大学 一种带有自适应光程调节装置的光学相干层析成像系统
CN201026212Y (zh) * 2006-12-21 2008-02-27 浙江大学 光学相干层析技术眼底成像的血糖无损检测装置
CN100536761C (zh) * 2007-03-14 2009-09-09 温州医学院 一种动物眼轴长及各组织结构活体厚度的测量方法
CN102058391A (zh) * 2009-11-17 2011-05-18 佳能株式会社 用于对光学相干断层图像成像的设备和方法
US20120083667A1 (en) * 2010-09-30 2012-04-05 Nidek Co., Ltd. Method of observing a three-dimensional image of examinee's eye
CN102438505A (zh) * 2011-04-23 2012-05-02 深圳市斯尔顿科技有限公司 一种眼科oct系统和眼科oct成像方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4819478B2 (ja) * 2005-10-31 2011-11-24 株式会社ニデック 眼科撮影装置
JP4822969B2 (ja) * 2006-07-27 2011-11-24 株式会社ニデック 眼科撮影装置
JP4996917B2 (ja) * 2006-12-26 2012-08-08 株式会社トプコン 光画像計測装置及び光画像計測装置を制御するプログラム
EP1962081B1 (de) * 2007-02-21 2016-09-14 Agfa HealthCare N.V. System zur optischen Kohärenztomographie
JP5632386B2 (ja) * 2008-11-26 2014-11-26 カール ツアイス メディテック アクチエンゲゼルシャフト 画像化システム
JP5545630B2 (ja) * 2010-01-21 2014-07-09 株式会社ニデック 眼科撮影装置
EP2485009A1 (de) * 2011-02-04 2012-08-08 Haag-Streit Ag Frequenzbereichs-OCT

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1181784C (zh) * 2002-06-14 2004-12-29 清华大学 一种带有自适应光程调节装置的光学相干层析成像系统
CN201026212Y (zh) * 2006-12-21 2008-02-27 浙江大学 光学相干层析技术眼底成像的血糖无损检测装置
CN100536761C (zh) * 2007-03-14 2009-09-09 温州医学院 一种动物眼轴长及各组织结构活体厚度的测量方法
CN102058391A (zh) * 2009-11-17 2011-05-18 佳能株式会社 用于对光学相干断层图像成像的设备和方法
US20120083667A1 (en) * 2010-09-30 2012-04-05 Nidek Co., Ltd. Method of observing a three-dimensional image of examinee's eye
CN102438505A (zh) * 2011-04-23 2012-05-02 深圳市斯尔顿科技有限公司 一种眼科oct系统和眼科oct成像方法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103892791B (zh) * 2014-04-04 2015-09-23 深圳市斯尔顿科技有限公司 眼科测量装置和方法
CN103892791A (zh) * 2014-04-04 2014-07-02 深圳市斯尔顿科技有限公司 眼科测量装置和方法
CN103976707A (zh) * 2014-05-20 2014-08-13 深圳市斯尔顿科技有限公司 一种测量眼轴光程值的oct系统及方法
CN103976708A (zh) * 2014-05-20 2014-08-13 深圳市莫廷影像技术有限公司 角膜顶点对准方法和系统及眼轴光程长度测量方法和系统
CN103976707B (zh) * 2014-05-20 2016-05-04 深圳市斯尔顿科技有限公司 一种测量眼轴光程值的oct系统及方法
CN103989453A (zh) * 2014-06-03 2014-08-20 深圳市莫廷影像技术有限公司 一种多功能眼科测量装置及测试人眼不同部位的方法
US11547294B2 (en) 2018-09-18 2023-01-10 Topcon Corporation Ophthalmic apparatus, controlling method thereof, and recording medium
CN110916611A (zh) * 2018-09-18 2020-03-27 株式会社拓普康 眼科装置及其控制方法、程序和存储介质
US11813022B2 (en) 2018-09-18 2023-11-14 Topcon Corporation Ophthalmic apparatus, controlling method thereof, and recording medium
CN110522406A (zh) * 2019-08-16 2019-12-03 广州浩康生物科技有限公司 一种眼轴长度测量装置及眼轴长度测量方法
CN113520298A (zh) * 2021-06-15 2021-10-22 上海应用技术大学 一种眼前后节一体光学相干断层结构/功能成像系统
CN113520298B (zh) * 2021-06-15 2023-04-28 上海应用技术大学 一种眼前后节一体光学相干断层结构/功能成像系统
CN113499032B (zh) * 2021-09-13 2022-04-05 中港大富科技(深圳)有限公司 一种多维检测仪
CN113499032A (zh) * 2021-09-13 2021-10-15 中港大富科技(深圳)有限公司 一种多维检测仪

Also Published As

Publication number Publication date
US20140098345A1 (en) 2014-04-10
EP2767220A1 (en) 2014-08-20
CN203643682U (zh) 2014-06-11
EP2767220B1 (en) 2019-06-19
US9370300B2 (en) 2016-06-21
EP2767220A4 (en) 2015-08-19

Similar Documents

Publication Publication Date Title
WO2013159280A1 (zh) 眼科光学相干断层成像系统及快速切换实现前后节成像方法
US9737207B2 (en) Method for quick switching to realize anterior and posterior eye segments imaging
US10743762B2 (en) Ophthalmologic apparatus
CN210871522U (zh) 多功能眼科测量系统
WO2012145882A1 (zh) 一种眼科oct系统和眼科oct成像方法
JP2023126361A (ja) 眼科装置、その制御方法、プログラム、及び記録媒体
JP2017136215A (ja) 眼科装置及び眼科検査システム
JP2020081469A (ja) 眼科装置
JP3636917B2 (ja) 眼屈折力測定装置
CN111643048A (zh) 基于微调焦的眼科测量系统及其测量方法
CN213525084U (zh) 眼科测量系统
JP7106320B2 (ja) 眼科装置、及び眼科装置の制御方法
JP2020130266A (ja) 眼科装置
CN111557637A (zh) 眼科测量系统
US11497397B2 (en) Ophthalmologic apparatus
CN111787844B (zh) 眼科装置以及眼科装置的控制方法
CN213883159U (zh) 基于快门切换的眼科测量系统
JP7133995B2 (ja) 眼科装置、及びその制御方法
JP7103813B2 (ja) 眼科装置
CN118000655A (zh) 一种眼科测量系统
CN111671389A (zh) 基于反射切换的眼科测量系统
JP2023126596A (ja) 眼科装置、及びその制御方法
JP2020006105A (ja) 眼科装置、及び眼科装置の制御方法
JP2019170470A (ja) 眼科装置
JP2019176970A (ja) 眼科装置、及び眼科情報処理プログラム

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201290000031.1

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 14124030

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12875405

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2012875405

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE