CN209315847U - For increasing the OCT system of fundus imaging range - Google Patents
For increasing the OCT system of fundus imaging range Download PDFInfo
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- CN209315847U CN209315847U CN201821600707.6U CN201821600707U CN209315847U CN 209315847 U CN209315847 U CN 209315847U CN 201821600707 U CN201821600707 U CN 201821600707U CN 209315847 U CN209315847 U CN 209315847U
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Abstract
The utility model provides the OCT system for increasing fundus imaging figure, belongs to medical imaging techniques field comprising fundus imaging light source, sample arm, the first signal processing unit and computer；Sample arm includes galvanometer unit, eyepiece and prolongs away from scanning mirror unit；Prolonging away from scanning mirror unit includes the first optical filter, the second optical filter, the first reflecting mirror, the second reflecting mirror and the first scanning lens；The first light beam that fundus imaging light source issues successively eventually arrives at tested human eye through galvanometer unit, the first optical filter, the first reflecting mirror, the first scanning lens, the second reflecting mirror, the second optical filter, eyepiece, the first signal processing unit is reflected back along original optical path from tested human eye again and forms the first data flow, and the first data flow forms fundus imaging figure through computer.The case where being equipped with and prolong away from scanning mirror unit, the available biggish fundus imaging figure of areas imaging based on the galvanometer unit in sample arm and between eyepiece, and then tested human eye can accurately being recognized according to eyeground tomograph.
Description
Technical field
The utility model relates to medical imaging techniques fields, more particularly, to increase the OCT system of fundus imaging range.
Background technique
OCT (Optical Coherence Tomography, means of optical coherence tomography) imaging is from ultrasound
Wave imaging technique, the characteristics of combining low coherence interference and confocal micro-measurement, by the phase delay of detection scattering light wave, from
Scattering light at the different depth of eyeground to detect reflection depth corresponding to phase delay, then passes through with reference to the interference of light
Light beam scanning, signal conversion, data extract and etc. obtain eyeground tomograph, the i.e. longitudinal sectional drawing on eyeground, thus according to eye
Bottom tomograph is come the case where recognizing tested human eye.Usually before obtaining eyeground tomograph, it is also necessary to obtain tested human eye
Transverse cross-sectional view, i.e. fundus imaging figure judge that tested human eye needs to carry out the position of tomographic imaging by fundus imaging figure.
Currently, in traditional OCT system, fundus imaging figure and eyeground tomograph separate measurement and obtain, and eyeground at
As range is greater than eyeground tomographic imaging range, but due to the influence of measuring instrument, the measurement factors such as environment, fundus imaging figure with
Tomograph needs in eyeground are adjusted, and are just able to achieve corresponding to each other for fundus imaging figure and eyeground tomograph, and then increase clinic
The workload of doctor, in order to solve this problem, as shown in Figure 1, to fundus imaging figure and eyeground tomography by the way of altogether
Figure measures, but reduces the areas imaging of fundus imaging figure, areas imaging and the eyeground tomograph of the fundus imaging figure
Areas imaging be it is equally big, the areas imaging based on fundus imaging figure is small, and then cannot be according to eyeground tomograph accurately
The case where solving tested human eye, therefore cause clinician that cannot be scanned comprehensively to eyeground, so that it is inadequate to obtain scanning result
Accurately.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is that being used to increase the OCT of fundus imaging range
System, the areas imaging for solving fundus imaging figure is small, causes accurately understand tested human eye situation according to eyeground tomograph
The problem of.
The purpose of this utility model adopts the following technical scheme that realization:
For increasing the OCT system of fundus imaging range comprising fundus imaging light source, sample arm, the first signal processing
Unit and computer；The sample arm includes galvanometer unit and eyepiece；It is equipped with and prolongs between the galvanometer unit and the eyepiece
Away from scanning mirror unit；The fundus imaging light source issues the first light beam, and first light beam is successively through the galvanometer unit, described
Prolong and eventually arrive at tested human eye away from scanning mirror unit, the eyepiece, then is reflected back first letter from tested human eye along original optical path
Number processing unit forms the first data flow, and first data flow through the computer and form fundus imaging figure；Wherein,
Described prolong away from scanning mirror unit includes the first optical filter, the second optical filter, the first reflecting mirror, the second reflecting mirror and the
One scanning lens, first light beam is successively through the galvanometer unit, first optical filter, first reflecting mirror, described
First scanning lens, second reflecting mirror, second optical filter to the eyepiece.
Optionally, the OCT system further include: OCT light source, beam treatment unit, reference arm, reference mirror, the second scanning
Lens；The OCT light source issues the second light beam, and second light beam is divided into third light beam and the 4th through the beam treatment unit
Light beam, the third light beam successively eventually arrive at tested person through the galvanometer unit, second scanning lens, the eyepiece
Eye, then be reflected back the beam treatment unit along original optical path from tested human eye and form signal beams；Described in the 4th light beam warp
Reference arm reaches the reference mirror, then is reflected back the beam treatment unit along original optical path from the reference mirror and forms reference light
Beam；The signal beams couple to form interfering beam with the reference beam；
The interfering beam forms the second data flow through the second signal processing unit, and second data flow through described
Computer forms eyeground tomograph.
Optionally, the first signal processing member includes photodetector；The second signal processing unit includes spectrum
Instrument.
Optionally, the sample arm further includes the first collimation lens, and first collimation lens is for respectively by described the
One light beam and third light beam are converted to collimated light beam by a light beam, and the collimated light beam is emitted to the galvanometer unit.
Optionally, the galvanometer unit further includes the first galvanometer and the second galvanometer, and first galvanometer and the second galvanometer are used
In the incident direction for controlling first light beam and the tested human eye of third light beam injection.
Optionally, the galvanometer unit further includes galvanometer control module, for controlling first galvanometer and the second galvanometer
Rotation.
Optionally, the galvanometer control module includes vibrating mirror driver.
Optionally, the OCT light source is super-radiance light emitting diode, and the beam treatment unit is fiber coupler.
Compared with prior art, the utility model has the beneficial effects that:
Based on above-mentioned OCT system, prolong in the galvanometer unit in sample arm and being equipped between eyepiece away from scanning mirror unit；Make eye
The first light beam that bottom imaging source issues successively through galvanometer unit, prolong and eventually arrive at tested person away from scanning element mirror unit, eyepiece
Eye, then emit from tested human eye along original optical path to galvanometer unit, galvanometer unit then successively emits the first light beam to the first signal
Processing unit, computer, to obtain the biggish fundus imaging figure of areas imaging；Based on galvanometer unit and prolong away from scanning mirror unit
Distance and fundus imaging range it is in direct ratio, when galvanometer unit with prolong away from remoter, then fundus imaging at a distance from scanning mirror unit
Range is bigger；And then the case where can accurately recognize tested human eye according to eyeground tomograph, more specifically, prolong away from sweeping
Retouch mirror unit include the first optical filter, the second optical filter, the first reflecting mirror, the second reflecting mirror and the first scanning lens, eyeground at
The first light beam issued as light source is successively through galvanometer unit, the first optical filter, the first reflecting mirror, the first scanning lens, second anti-
Mirror, the tested human eye of eyepiece arrival are penetrated, the biggish fundus imaging figure of areas imaging is obtained；First scanning lens and galvanometer unit away from
From, at positive example, when the first scanning lens is remoter at a distance from galvanometer unit, then fundus imaging range is got over fundus imaging range
Greatly；And then the case where can accurately recognize tested human eye according to eyeground tomograph, thus cause clinician can to eyeground into
Row scanning comprehensively, to obtain accurate scanning result.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is provided by the utility model for increasing the structural schematic diagram of the OCT system of fundus imaging figure；
Fig. 2 is the index path provided by the utility model for forming eyeground tomograph；
Fig. 3 is the index path provided by the utility model for forming fundus imaging figure；
Fig. 4 is provided by the utility model for increasing the index path of the OCT system of fundus imaging figure；
Legend: 1-OCT light source, 2- beam treatment unit, 3- second signal processing unit, 4- computer, 5- sample arm,
The first collimation lens of 51-, 52- galvanometer unit, the first galvanometer of 521-, the second galvanometer of 522-, the first optical filter of 53-, 54- first are anti-
Penetrate mirror, the second scanning lens of 55-, the first scanning lens of 56-, the second optical filter of 57-, the second reflecting mirror of 58-, 59- eyepiece, 6- ginseng
Examine arm, the second collimation lens of 61-, 7- fundus imaging light source, the first signal processing unit of 8-, 9- is tested human eye, 10- reference mirror.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
In order to which the areas imaging for solving fundus imaging figure is small, cause accurately be recognized according to eyeground tomograph tested
The problem of human eye situation, present embodiments provides the OCT system for increasing fundus imaging range as shown in Figure 2, Figure 3 and Figure 4
System comprising OCT light source 1, fundus imaging light source 7, beam treatment unit 2, the first signal processing unit 8, second signal processing
Unit 3, computer 4, sample arm 5, reference arm 6 and reference mirror 10, wherein sample arm 5 includes galvanometer unit 52 and eyepiece 59；?
It is equipped with and prolongs away from scanning mirror unit between galvanometer unit 52 and eyepiece 59；
Fundus imaging light source 7 issue the first light beam, the first light beam successively through galvanometer unit 52, prolong away from scanning mirror unit, mesh
Mirror 59 eventually arrives at tested human eye 9, then is reflected back the first signal processing unit 8 along original optical path from tested human eye 9 and forms the first number
According to stream, the first data flow forms fundus imaging figure through computer 4；
Beam treatment unit 2 is all made of optical fiber and connect with OCT light source 1, sample arm 5, reference arm 6, and OCT light source 1 issues the
Two light beams, the second light beam are divided into third light beam and the 4th light beam through beam treatment unit 2, and third light beam is successively through galvanometer unit
52, the second scanning lens 55, eyepiece 59 eventually arrive at tested human eye 9, then are reflected back beam treatment along original optical path from tested human eye 9
Unit 2 forms signal beams, and the 4th light beam reaches reference mirror 10 through reference arm 6, then from reference mirror 10 along original optical path reflected light
Beam processing unit 2 forms reference beam, and signal beams couple to form interfering beam with reference beam；Interfering beam is through second signal
Processing unit 3 formed the second data flow, the second data flow through computer 4 formed eyeground tomograph, because third light beam without prolong away from
Scanning lens unit, therefore the areas imaging of the eyeground tomograph is less than the areas imaging of fundus imaging figure.
Wherein, prolong anti-including the first optical filter 53, the second optical filter 57, the first reflecting mirror 54, second away from scanning mirror unit
Mirror 58 and the first scanning lens 56 are penetrated, therefore the first light beam that fundus imaging light source 7 issues successively filters through galvanometer unit 52, first
Piece 53, the first reflecting mirror 54, the first scanning lens 56, the second reflecting mirror 58, the second optical filter 57 and eyepiece 59 eventually arrive at
Tested human eye 9, then be reflected back the first signal processing unit 8 along original optical path from tested human eye 9 and form the first data flow, the first data
It flows through computer 4 and forms fundus imaging figure.
As described above, the first light beam that fundus imaging light source 7 issues is successively through galvanometer unit 52, the first optical filter
53, the first reflecting mirror 54, the first scanning lens 56, the second reflecting mirror 58, the second optical filter 57 eventually arrive at tested human eye 9, then
It is reflected back galvanometer unit 52 from tested human eye 9 along original optical path, galvanometer unit 52 successively emits it to the first signal processing unit
8, computer 4, to obtain the biggish fundus imaging figure of areas imaging, based on galvanometer unit 52 and the first scanning lens 56 away from
It is in direct ratio from the areas imaging of fundus imaging figure, when galvanometer unit 52 is remoter at a distance from the first scanning lens 56, then eye
The areas imaging of bottom image is bigger；So as to change at a distance from the first scanning lens 56 by adjusting galvanometer unit 52
The areas imaging size of fundus imaging figure.
In the present embodiment, galvanometer unit 52 is constant at a distance from the second scanning lens 55, and in galvanometer unit 52
The first optical filter 53 and the first reflecting mirror 54 are equipped between the first scanning lens 56, to extend galvanometer unit 52 and first
The distance of scanning lens 56 makes galvanometer unit 52 be greater than galvanometer unit 52 and the second scanning at a distance from the first scanning lens 56 thoroughly
The distance of mirror 55, the i.e. areas imaging of fundus imaging figure are greater than the areas imaging of eyeground tomograph.The imaging of the fundus imaging figure
The case where range is bigger, then more can accurately and comprehensively recognize tested human eye 9 by eyeground tomograph.
In position and the range for determining fundus imaging figure, two-dimensional scanning is carried out to tested human eye 9 and obtains eyeground tomography
The case where scheming, tested human eye 9 comprehensively, are accurately recognized further according to eyeground tomograph, that is, solve the imaging of fundus imaging figure
The problem of range is small, and tested 9 situation of human eye cannot be accurately understood according to eyeground tomograph, therefore clinician is by OCT system
Tested human eye 9 can be scanned comprehensively, to obtain accurate scanning result.
In the work of above-mentioned OCT system, fundus imaging figure and eyeground tomograph can be acquired simultaneously, can also first acquire eye
Bottom image acquires eyeground tomograph again, which plays positioning, which, which rises, understands tested human eye 9
The effect of situation.
In addition, based in sample arm be equipped with prolong away from scanning mirror unit, in addition to can obtain the biggish eyeground of areas imaging at
As figure, the cost of whole system is also reduced.
Wherein, the first signal processing unit 8, second signal processing unit 3 have many selection modes, and in the present embodiment
First signal processing unit 8 includes photodetector, and photodetector can be single-point photodetector；Second signal processing is single
Member 3 includes spectrometer.
As shown in figure 4, sample arm 5 further includes the first collimation lens 51, the first collimation lens 51 is used for respectively by the first light
Beam and third light beam are converted to collimated light beam by a light beam, and the collimated light beam is emitted to galvanometer unit 52；And then avoid the
One light beam or third beam crosses, which emit, influences final scanning result to galvanometer unit 52.
Reference arm 6 further includes the second collimation lens 61, and the second collimation lens 61 is used to convert the 4th light beam by light beam
For collimated light beam, and the collimated light beam is emitted to galvanometer unit 52；And then the 4th beam crosses is avoided to emit to reference arm 6,
Influence final scanning result.
More specifically, galvanometer unit 52 further includes the first galvanometer 521 and the second galvanometer 522, the first galvanometer 521 and second
Galvanometer 522 is used to control the first light beam respectively and third light beam injects the incident direction of tested human eye 9, and then respectively to tested person
Eye 9 carries out eyeground and two-dimensional scanning.
Galvanometer unit 52 further includes galvanometer control module, for controlling the rotation of the first galvanometer 521 and the second galvanometer 522,
Wherein, for the galvanometer control module there are many kinds of selection mode, the galvanometer control module in the present embodiment includes vibrating mirror driver.
In addition, above-mentioned galvanometer unit 52 is not limited to the manifestation mode of the present embodiment, details are not described herein again.
It further says, OCT light source 1 is super-radiance light emitting diode, and beam treatment unit 2 is fiber coupler.The light
Optical fiber connection is all made of between fine coupler and super-radiance light emitting diode, spectrometer, sample arm 5 and reference arm 6.
In addition, OCT light source 1 can also use swept light source, and when OCT light source uses swept light source, then second signal
Processing unit 3 is photodetector.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (10)
1. the OCT system for increasing fundus imaging range comprising fundus imaging light source, sample arm, the first signal processing list
Member and computer；The sample arm includes galvanometer unit and eyepiece；It is characterized in that, the galvanometer unit and the eyepiece it
Between be equipped with prolong away from scanning mirror unit；The fundus imaging light source issues the first light beam, and first light beam is successively through the galvanometer
Unit, described prolong eventually arrive at tested human eye, then are reflected back institute from tested human eye along original optical path away from scanning mirror unit, the eyepiece
It states the first signal processing unit and forms the first data flow, first data flow through the computer and form fundus imaging figure；Its
In,
Described prolong is swept away from scanning mirror unit including the first optical filter, the second optical filter, the first reflecting mirror, the second reflecting mirror and first
Lens are retouched, first light beam is successively through the galvanometer unit, first optical filter, first reflecting mirror, described first
Scanning lens, second reflecting mirror, second optical filter to the eyepiece.
2. OCT system according to claim 1, which is characterized in that the OCT system further include: at OCT light source, light beam
Manage unit, reference arm, reference mirror, the second scanning lens, second signal processing unit；The OCT light source issues the second light beam, institute
It states the second light beam and is divided into third light beam and the 4th light beam through the beam treatment unit, the third light beam is successively through the galvanometer
Unit, second scanning lens, the eyepiece eventually arrive at tested human eye, then are reflected back along original optical path from tested human eye described
Beam treatment unit forms signal beams；4th light beam reaches the reference mirror through the reference arm, then from the reference
Mirror is reflected back the beam treatment unit along original optical path and forms reference beam；The signal beams couple shape with the reference beam
At interfering beam；
The interfering beam forms the second data flow through the second signal processing unit, and second data flow through the calculating
Machine forms eyeground tomograph.
3. OCT system according to claim 2, which is characterized in that the first signal processing member includes photodetector；
The second signal processing unit includes spectrometer.
4. OCT system according to claim 2 or 3, which is characterized in that the sample arm further includes the first collimation lens,
First collimation lens is for being converted to collimated light beam by a light beam for first light beam and third light beam respectively, and by institute
Collimated light beam is stated to emit to the galvanometer unit.
5. OCT system according to claim 2 or 3, which is characterized in that the galvanometer unit further includes the first galvanometer and
Two galvanometers, first galvanometer and the second galvanometer are used to control first light beam and third light beam injects the incidence of tested human eye
Direction.
6. OCT system according to claim 5, which is characterized in that the galvanometer unit further includes galvanometer control module, is used
In the rotation for controlling first galvanometer and the second galvanometer.
7. OCT system according to claim 6, which is characterized in that the galvanometer control module includes vibrating mirror driver.
8. OCT system according to claim 2 or 3, which is characterized in that the OCT light source is super-radiance light emitting diode,
The beam treatment unit is fiber coupler.
9. OCT system according to claim 4, which is characterized in that the OCT light source is super-radiance light emitting diode, institute
Stating beam treatment unit is fiber coupler.
10. OCT system according to claim 5, which is characterized in that the OCT light source is super-radiance light emitting diode, institute
Stating beam treatment unit is fiber coupler.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330558A (en) * | 2018-09-29 | 2019-02-15 | 执鼎医疗科技（杭州）有限公司 | For increasing the OCT system of fundus imaging range |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109330558A (en) * | 2018-09-29 | 2019-02-15 | 执鼎医疗科技（杭州）有限公司 | For increasing the OCT system of fundus imaging range |
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