A kind of anterior ocular segment OCT image device and methodTechnical field
The present invention relates to medical imaging techniques field, more particularly to a kind of anterior ocular segment OCT image device and method.
Background technology
OCT is called Optical coherence tomography, is a kind of imaging technique that last decade is developed rapidly, and it utilizes weak phaseThe general principle of dry optical interferometer, detects biological tissue's different depth aspect to the back-reflection of incident weak coherent light or dissipates several timesSignal is penetrated, by scanning, biological tissue's two dimension or three-dimensional structure image is can obtain.Existing anterior ocular segment OCT image device is entering, it is necessary to switch OCT main scanning light paths during row scanning, or the addition lens in addition in front of OCT, complex operation, take more skyBetween.
The content of the invention
In view of the shortcomings of the prior art, one of the object of the invention is to provide a kind of simple in construction, simple to operate and savedThe anterior ocular segment OCT image device in space.
The second object of the present invention, which is that offer is a kind of, need not switch whole sample arm light path, anterior ocular segment simple to operateOCT image method.
An object of the present invention adopts the following technical scheme that realization：
A kind of anterior ocular segment OCT image device, light source, deconcentrator, sample arm, reference arm and signal processor, deconcentrator withSignal processor is connected, and the sample arm includes the first collimation lens, scanning galvanometer, electronic rotary wheel frame, scanning lens and inspection eyeMirror, the scanning galvanometer includes X scanning galvanometers and Y scan galvanometer, and the light beam that the light source is sent divides after the deconcentratorInto sample arm light beam and reference arm light beam；
The sample arm light beam passes sequentially through first collimation lens, the scanning galvanometer, the Electric Motor Wheel pivoted frame, instituteState scanning lens and the ophthalmoscope reaches human eye, be then reflected back the deconcentrator, the Electric Motor Wheel pivoted frame is provided with colour killingAplanat and dichroscope, the Electric Motor Wheel pivoted frame control the sample arm light beam in the achromatic lens and the dichroicSwitch between mirror, the real time imagery to anterior ocular segment and oculi posterior segment is realized respectively；
The reference arm light beam enters the reference arm back reflection and returns the deconcentrator.
Further, the reference arm includes the second collimation lens and reflective mirror, and the reference arm light beam is by described theCollimated after two collimation lenses, be then passed through the reflective mirror back reflection and return the deconcentrator.
Further, the ophthalmoscope is two-sided even aspheric surface lens.
The second object of the present invention is realized using following technical scheme：
A kind of anterior ocular segment OCT image method, including：
The light beam that light source is sent is divided into sample arm light beam and reference arm light beam after deconcentrator, and sample arm light beam enters sampleProduct arm, reference arm light beam enters reference arm；
Electric Motor Wheel pivoted frame control sample arm light beam in the sample arm switches between achromatic lens and dichroscope,The imaging to anterior ocular segment and oculi posterior segment is realized respectively；
The sample arm light beam imaging back reflection returns the deconcentrator；
The reference arm light beam enters the reference arm back reflection and returns the deconcentrator；
The sample arm light beam and reference arm light beam being reflected back are interfered；
Signal processor after interference information processing to realizing OCT image.
Further, the Electric Motor Wheel pivoted frame control sample arm light beam switches between achromatic lens and dichroscope,The real time imagery to anterior ocular segment and oculi posterior segment is realized respectively, is specifically included：
When testing anterior ocular segment, it is saturating that sample arm light beam is switched to the achromatism by electronic rotary wheel frame in the sample armMirror, when testing oculi posterior segment, sample arm light beam is switched to the dichroscope by the electronic rotary wheel frame in the sample arm.
Further, the reference arm includes the second collimation lens and reflective mirror, and reference arm light beam is accurate by described secondCollimated after straight lens, be then passed through the reflective mirror back reflection and return deconcentrator.
Compared to prior art, the beneficial effects of the present invention are：Electronic rotary wheel frame is added in sample arm light path, is passed throughElectronic rotary wheel frame control sample arm light path switches between achromatic lens and dichroscope, realizes respectively to after anterior ocular segment and eyeThe test of section, without switching whole sample arm light path, or the addition lens in addition in front of OCT, structure is simpler, operatesMore to facilitate, space-consuming is reduced, operating efficiency is improved.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,And can be practiced according to the content of specification, and in order to allow the above and other objects, features and advantages of the present invention canBecome apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Brief description of the drawings
Fig. 1 is anterior ocular segment OCT image schematic device in the embodiment of the present invention；
Fig. 2 is electronic rotary wheel frame schematic diagram in the embodiment of the present invention；
Fig. 3 is anterior ocular segment OCT image method schematic diagram in the embodiment of the present invention.
In figure：10th, light source；20th, deconcentrator；30th, sample arm；31st, the first collimation lens；32nd, scanning galvanometer；33rd, it is electronicTake turns pivoted frame；331st, achromatic lens；332nd, dichroscope；34th, scanning lens；35th, ophthalmoscope；36th, human eye；40th, reference arm；41st, the second collimation lens；42nd, reflective mirror；50th, signal processor.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
As shown in Figure 1-2, it is anterior ocular segment OCT image device in the embodiment of the present invention, including light source 10, deconcentrator 20, sampleProduct arm 30, reference arm 40 and signal processor 50, deconcentrator 20 are connected with signal processor 50, and sample arm 30 includes the first collimationLens 31, scanning galvanometer 32, electronic rotary wheel frame 33, scanning lens 34 and ophthalmoscope 35, scanning galvanometer 32 include X scanning galvanometers andY scan galvanometer, Electric Motor Wheel pivoted frame 33 is provided with achromatic lens 331 and dichroscope 332, and it is saturating that reference arm 40 includes the second collimationMirror 41 and reflective mirror 42, the light beam that light source 10 is sent are divided into sample arm light beam and reference arm light beam after deconcentrator 20.
The light path of sample arm light beam is as follows：Sample arm light beam passes sequentially through the first collimation lens 31, scanning galvanometer 32, electronicTake turns pivoted frame 33, scanning lens 34 and ophthalmoscope 35 and reach human eye 36, be then reflected back deconcentrator 20, the control sample of Electric Motor Wheel pivoted frame 33Product arm light beam switches between achromatic lens 331 and dichroscope 332, wherein, when testing anterior ocular segment, electronic rotary wheel frame 33Sample arm light beam is switched into achromatic lens 331, when testing oculi posterior segment, electronic rotary wheel frame 33 switches to sample arm light beamDichroscope 332, realizes the real time imagery to anterior ocular segment and oculi posterior segment respectively；
The light path of reference arm light beam is as follows：Reference arm light beam is collimated after the second collimation lens 41, is then passed through reflectiveMirror 42 is reflected back deconcentrator 20；
The sample arm light beam and reference arm light beam being reflected back are interfered, and signal processor 50 is to real after interference information processingExisting OCT image.
As further embodiment, ophthalmoscope 35 is two-sided even aspheric surface lens, makes the scanning of sample arm light beamLight path focal plane focuses on for cambered surface, closer to the physiological structure of human eye, becomes apparent from.
As shown in figure 3, be anterior ocular segment OCT image method in the embodiment of the present invention, including：
The light beam that step 10, light source are sent is divided into sample arm light beam and reference arm light beam, sample ami light after deconcentratorBeam enters sample arm, and reference arm light beam enters reference arm；
Wherein, sample arm includes the first collimation lens, scanning galvanometer, electronic rotary wheel frame, scanning lens and ophthalmoscope, referenceArm includes the second collimation lens and reflective mirror.
Electric Motor Wheel pivoted frame control sample arm light beam in step 20, sample arm is cut between achromatic lens and dichroscopeChange, the test to anterior ocular segment and oculi posterior segment is realized respectively；
Specifically, sample arm light beam pass sequentially through the first collimation lens, scanning galvanometer, Electric Motor Wheel pivoted frame, scanning lens andOphthalmoscope reaches human eye, and scanning galvanometer includes X scanning galvanometers and Y scan galvanometer, electronic rotary wheel frame provided with achromatic lens andDichroscope, when testing anterior ocular segment, sample arm light beam is switched to achromatic lens by the electronic rotary wheel frame in sample arm, works as surveyWhen trying oculi posterior segment, sample arm light beam is switched to dichroscope by the electronic rotary wheel frame in sample arm.
Step 30, sample arm test light beam back reflection return deconcentrator；
Step 40, reference arm light beam enter reference arm back reflection and return deconcentrator；
Specifically, reference arm light beam is collimated after the second collimation lens, it is then passed through reflective mirror back reflection and returns deconcentrator.
Step 50, the sample arm light beam being reflected back and reference arm light beam are interfered；
Step 60, signal processor after interference information processing to realizing OCT image.
As further embodiment, ophthalmoscope is two-sided even aspheric surface lens, makes the scanning light of sample arm light beamRoad focal plane focuses on for cambered surface, closer to the physiological structure of human eye, becomes apparent from.
Compared to prior art, the beneficial effects of the present invention are：Electronic rotary wheel frame is added in sample arm light path, is passed throughElectronic rotary wheel frame control sample arm light path switches between achromatic lens and dichroscope, realizes respectively to after anterior ocular segment and eyeThe test of section, without switching whole sample arm light path, or the addition lens in addition in front of OCT, structure is simpler, operatesMore to facilitate, space-consuming is reduced, operating efficiency is improved.
Above-mentioned embodiment is only the preferred embodiment of the present invention, it is impossible to limit the scope of protection of the invention with this,The change and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present inventionClaimed scope.