CN202010143U - Light barring rotating disc used for frequency domain OCT system and frequency domain OCT system - Google Patents
Light barring rotating disc used for frequency domain OCT system and frequency domain OCT system Download PDFInfo
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- CN202010143U CN202010143U CN2011200676321U CN201120067632U CN202010143U CN 202010143 U CN202010143 U CN 202010143U CN 2011200676321 U CN2011200676321 U CN 2011200676321U CN 201120067632 U CN201120067632 U CN 201120067632U CN 202010143 U CN202010143 U CN 202010143U
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Abstract
The utility model discloses a light barring rotating disc used for a frequency domain Optical Coherence Tomography (OCT) system, comprising at least two fan-shaped fan blades, wherein the two fan-shaped fan blades can rotate about a same rotating shaft, and the included angle between the two sides of each fan blade is the same as the included angle between the two adjacent fan blades. Correspondingly, the utility model also discloses a frequency domain OCT system, the implementation of the embodiments of the utility model can resolve the problem of unstable amplitude caused by increasing of frequency and the problem that signal appears disordered and malposed when frequency is too high, in the prior art, thereby ensuring that the increasing of optical path switching speed does not influence the system imaging quality, increasing switching frequency, realizing high speed rotation real time imaging, and being high in stability and relatively low in cost. The light barring rotating disc can also be applied to a double reference arm or multi-reference arm frequency domain OCT system and perform optical path switching of multi-reference arm, thereby greatly increasing the general applicability.
Description
Technical field
This utility model relates to the electric mechanical field, relates in particular to a kind of be in the light rotating disk and a kind of frequency domain OCT system that is applied to frequency domain OCT system.
Background technology
Optical coherent chromatographic imaging (OCT, Optical Coherence Tomography) is a kind of emerging optical image technology, with respect to traditional clinical imaging means, having advantages such as resolution height, image taking speed, radiationless damage, moderate cost, compact conformation, is the important potential instrument of basic medical research and clinical diagnostic applications.
In the prior art, frequency domain OCT system has occurred utilizing baffle plate and photoswitch switching-over light path to realize the conversion of two-way reference arm; Current baffle plate and photoswitch principle and galvanometer are similar, that is, baffle plate is more similar with single pendulum in the course of the work with photoswitch, increasing along with the single pendulum driving frequency, the amplitude of oscillation of single pendulum is more and more littler, and baffle edge also can and then rock, thereby causes the amplitude instability of baffle plate; And the light path position and the beam diameter of system are certain, and when system requirements is measured in real time, during realtime imaging, need the two-way reference arm to carry out very fast conversion, the frequency that promptly requires baffle plate and photoswitch to switch is very high; Current experiment shows, when switching frequency greater than 2 the time, the signal of the two-way phenomenon that will cause confusion, system's cisco unity malfunction.
The utility model content
This utility model embodiment technical problem to be solved has been to provide a kind of be in the light rotating disk and a kind of frequency domain OCT system that is applied to frequency domain OCT system, solved in the prior art and brought the amplitude problem of unstable owing to frequency increases, and when frequency is very big the cause confusion problem of phenomenon of signal, improve switching frequency, realized the realtime imaging of system.
In order to solve the problems of the technologies described above, a kind of rotating disk that is in the light that is applied to frequency domain OCT system that this utility model embodiment proposes, comprise at least two segmental flabellums, described at least two segmental flabellums can be around same rotating shaft rotation, and the angle on two limits of described flabellum is identical with angle between adjacent two flabellums.
Wherein, the described rotating disk that is in the light comprises 3 described flabellums, and the angle on two limits of described flabellum is 60 degree, and the angle between two adjacent flabellums is 60 degree.
Wherein, every flabellum arc length equates.
Wherein, the described rotating disk that is in the light also comprises and being connected with described rotating shaft to support the pedestal of described flabellum around described rotating shaft rotation.
Correspondingly, the invention also discloses a kind of frequency domain OCT system, comprise the above-mentioned rotating disk that is in the light, and be connected to control the rotating mechanism of the described rotating disk rotation of being in the light with described rotating shaft.
Wherein, described rotating mechanism is a motor.
Wherein, described frequency domain OCT system also comprises the lens and the plane mirror of two reference arms, each reference arm correspondence; The described rotating disk that is in the light is arranged between described lens and the described plane mirror, and the optical axis of described pair of reference arm input light and described rotating shaft are on same plane, and described input light arrives described plane mirror through described lens and the described rotating disk that is in the light.
Wherein, described frequency domain OCT system also comprises the photoswitch that is connected with the described rotating disk that is in the light, and the data collecting card that is connected with described rotating mechanism with described photoswitch respectively.
Wherein, described frequency domain OCT system also comprises sample, sample arm and sample arm scanning galvanometer, and described anterior ocular segment OCT system is by the scanning of the described sample arm scanning galvanometer of described data acquisition card control to described sample.
Wherein, described sample is the eyes anterior chamber.
Implement this utility model embodiment, have following beneficial effect:
By designing the rotating disk that is in the light that constitutes by at least two segmental flabellums, the angle on two limits of this flabellum is identical with angle between adjacent two flabellums, be that frequency domain OCT system adopts the equidistant alternate rotating disk that is in the light of light and shade to rotate the switching-over light path signal as baffle plate, solved in the prior art and brought the amplitude problem of unstable owing to frequency increases, and the problem that signal causes confusion and misplaces when frequency is very big, guaranteeing does not influence the system imaging quality along with the increase of light path switch speed, improved switching frequency, realize the high speed rotating realtime imaging, and stability is high, and cost is lower; Originally the rotating disk that is in the light can also be applied in the frequency domain OCT system of two reference arms or many reference arms, and the light path of carrying out many reference arms is switched, and has improved general applicability greatly.
Description of drawings
In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the be in the light structural representation of first embodiment of rotating disk of this utility model;
Fig. 2 is the be in the light Facad structure sketch map of second embodiment of rotating disk of this utility model;
Fig. 3 is the be in the light structure sketch map of second embodiment of rotating disk of this utility model;
Fig. 4 is the structural representation of first embodiment of frequency domain OCT of the present utility model system;
Fig. 5 is the structural representation of second embodiment of frequency domain OCT of the present utility model system.
The specific embodiment
Below in conjunction with the accompanying drawing among this utility model embodiment, the technical scheme among this utility model embodiment is clearly and completely described, obviously, described embodiment only is this utility model part embodiment, rather than whole embodiment.Based on the embodiment in this utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of this utility model protection.
The be in the light structural representation of first embodiment of rotating disk of this utility model as shown in Figure 1, the rotating disk 1 that is in the light comprises at least two segmental flabellums, described at least two segmental flabellums can be around same rotating shaft rotation, and the angle on two limits of described flabellum is identical with angle between adjacent two flabellums; Particularly, comprise that with the rotating disk 1 that is in the light 3 segmental flabellums 11 are that example describes among Fig. 1:
The rotating disk 1 that is in the light comprises shaft hole 13, and the rotating shaft (not shown in figure 1) that is connected with shaft hole 13, these 3 segmental flabellums 11 can be around same rotating shaft rotation, the limit of flabellum 11 comprises 11a, 11b, 11c, 11d, 11e and 11f among Fig. 1, the angle on two limits of flabellum 11 is identical with angle between adjacent two flabellums 11, the angle on two limits that shows each sheet flabellum 11 is all identical, that is, angle and the angle between limit 11e and the limit 11f between angle, limit 11c and the limit 11d between limit 11a and the limit 11b is all identical; Angle between two adjacent flabellums 11 is also identical, that is, angle and the angle between limit 11f and the limit 11a between angle, limit 11d and the limit 11e between limit 11b and the limit 11c are all identical; And the angle on two limits of each sheet flabellum 11 is identical with angle between adjacent two flabellums 11, that is, being equivalent to circle is divided equally in Fig. 1 is 6 five equilibriums, flabellum 11 setting of being separated by mutually; Among Fig. 1, the angle on two limits of each sheet flabellum 11 is 60 degree, and the angle between two adjacent flabellums 11 is 60 degree.Need to prove that the rotating disk 1 that is in the light comprises at least two segmental flabellums 11, that is, the rotating disk 1 that is in the light includes but not limited to 3 flabellums 11 showing among Fig. 1, and Fig. 1 is one of them embodiment, and the rotating disk 1 that is in the light can also comprise 4,5 flabellums 11 or the like.
Further, every flabellum 11 arc length among this utility model embodiment equate that promptly the size of every flabellum 11 is all identical; Be that length with every flabellum 11 arc length is all example mutually among Fig. 1; Certainly, every flabellum 11 arc length among this utility model embodiment can be different, can design according to user's self demand.
Again further, the be in the light Facad structure sketch map of second embodiment of rotating disk of this utility model as shown in Figure 2, and the be in the light structure sketch map of second embodiment of rotating disk of this utility model shown in Fig. 3, the rotating disk 1 that is in the light also comprises with rotating shaft 15 and being connected to support flabellum 11 pedestals 17 of 15 rotations around the shaft.
Particularly, pedestal 17 can and vertically extend two projections by these dull and stereotyped two ends by one flat plate and form, can extend this two projections from equidirectional, also can extend these two projections the other way around, be example to extend these two projections the other way around among Fig. 2 and Fig. 3,17 one-tenth Z types of pedestal, rotating shaft 15 is connected with shaft hole 13, and is fixed in the pedestal 17 top projections 171; The below can also have two screws on the projection 173, and screw is by being connected and pedestal 17 can being fixed on certain plane with screw etc.;
Need to prove that the size or the shape of above-mentioned flat board, projection 171 and projection 173 can design as the case may be, be not defined as Fig. 2 and size among Fig. 3 or the shape of this utility model embodiment; In Fig. 2, rotating shaft 15 can be fixed by screw after by shaft hole 13.
Below, be described with reference to the accompanying drawings the structure of frequency domain OCT of the present utility model system, the structural representation of first embodiment of frequency domain OCT of the present utility model as shown in Figure 4 system, frequency domain OCT system 4 comprises the rotating disk 1 that is in the light, and is connected with rotating shaft 15 with the be in the light rotating mechanism 41 of rotating disk 1 rotation of control.Rotating mechanism 41 can be motor, with the be in the light rotation of rotating disk 1 of drive.
Particularly, frequency domain OCT system 4 can examine arm frequency domain OCT system for Radix Triplostegiae Grandiflorae, or many reference arms frequency domain OCT system, be that example is elaborated with two reference arm frequency domain OCT system below, the structural representation of second embodiment of frequency domain OCT of the present utility model as shown in Figure 5 system:
Two reference arm frequency domain OCT system 4 comprises the lens 42 and the plane mirror 43 of each reference arm correspondence, the photoswitch 44 that is connected with the rotating disk 1 that is in the light, the data collecting card 45 that is connected with rotating mechanism 41 with photoswitch 44 respectively, light source 46, probe unit 47, optical fiber 48,2 * 2 bonders 49, Polarization Controller 410, the lens 411 of sample arm end, sample arm scanning galvanometer 412, sample 413,1 * 2 bonder 414, and computer 415.The rotating disk 1 that is in the light is arranged between lens 42 and the plane mirror 43, and the optical axis of described pair of reference arm input light and rotating shaft are on 15 same planes, and described input light arrives plane mirror 43 through the lens 42 and the rotating disk 1 that is in the light; Rotating mechanism 41 is controlled the rotation of the rotating disk 1 that is in the light to finish the switching of light path.Two reference arm frequency domain OCT system 4 is by the scanning of 412 pairs of samples 413 of data collecting card 45 control sample arm scanning galvanometers, particularly:
Light source 46(can be the wideband light source of 850nm) arrive 2 * 2 bonders 49 through optical fiber 48 as input light, be divided into sample arm and reference arm that two-beam enters frequency domain OCT system respectively then.Polarization Controller 410 is used for regulating the polarization state of light.The directional light of lens 411 outputs changes direction through sample arm scanning galvanometer 412, and sample 413 is the eyes anterior chamber in the sample 413(present embodiment after lens 411 focus on), during work sample 413 is scanned.Another light path that 2 * 2 bonders 49 come out is divided into two-beam through 1 * 2 bonder 414, gets to plane mirror 43 through lens 42 with directional light respectively, and former then road is returned.Data collecting card 45 output signals control rotating mechanism 41, rotating mechanism 41 drives rotating disk 1 rotation of being in the light by rotating shaft 15, the periodic two-way reference arm that switches, photoswitc 44 receive the square-wave signal of the light and dark dutycycle puppet 0.5 that rotating disk 1 rotation of being in the light obtains and give data collecting card 45 as synchronous triggering signal.By the scanning of 45 pairs of sample arm scanning galvanometers of data collecting card, 412 controls to sample 413.
Need to prove, by the conversion between the different reference arms of rotating mechanism 41 controls, as, rotating disk 1 is made of two flabellums when being in the light, two angles of fanning between sheet are 90 degree, its frequency domain is 1/4th of a sample arm scanning frequency domain, and promptly the baffle plate when reference arm rotates a circle, and sample arm realizes 4 scannings to sample 413.By twice measurement and by data collecting card 45 image data, carry out data splicing then, so can obtain whole anterior chamber's image; And for example, when the rotating disk 1 that is in the light is made of 3 flabellums, the angles between any two fan sheets are 60 degree, and its frequency domain is the sixth of sample arm scanning frequency domain so, and promptly the baffle plate when reference arm rotates a circle, and sample arm realizes 6 scannings to sample 413.When reference arm is finished once conversion, sample arm realizes 2 scannings to sample, by data collecting card 45 image data, carries out data splicing by twice measurement then, so can obtain whole anterior chamber's image.Frequency domain OCT of the present utility model system 4 remedies the insufficient shortcoming of frequency domain OCT investigation depth by regulating the reference arm light path, also can realize rapid scanning simultaneously.Common commercial frequency domain OCT system investigative range is about 3.5-4mm, can't carry out imaging to the whole anterior chamber of human eye.Frequency domain OCT system 4 utilizes the frequency domain system of two reference arms to measure whole anterior chamber rapidly, makes the investigation depth of frequency domain system near original twice, reach 7-8mm, thereby splicing obtains whole anterior chamber's image.
Further, the volume of rotating mechanism 41 is as far as possible little, and frequency domain OCT system 4 requires the load capacity of rotating mechanism 41 little, so rotating mechanism 41 can be selected micro-machine; Among this utility model embodiment, frequency domain OCT system 4 require switching of two-way light accurately, in images acquired, could guarantee corresponding scanning line like this in correct figure, that is, require reference arm and sample arm to also have the synchronicity of data collecting card to get well.If adopt the control of PWM DC pulse, signal can not be provided by capture card, be difficult to synchronously guarantee, even use feedback control, also be need very high cost.Thereby particularly, rotating mechanism 41 can be motor, and the pulse signal of motor can directly be exported by capture card, and capture card also can come the better controlled speed by step number and segmentation in addition.
In sum, implement this utility model embodiment, by designing the rotating disk that is in the light that constitutes by at least two segmental flabellums, the angle on two limits of this flabellum is identical with angle between adjacent two flabellums, be that frequency domain OCT system adopts the equidistant alternate rotating disk that is in the light of light and shade to rotate the switching-over light path signal as baffle plate, solved in the prior art and brought the amplitude problem of unstable owing to frequency increases, and when frequency is very big the cause confusion problem of phenomenon of signal, along with the increase of light path switch speed does not influence the system imaging quality, improved switching frequency, realize the high speed rotating realtime imaging, and stability is high, cost is lower; Originally the rotating disk that is in the light can also be applied in the frequency domain OCT system of two reference arms or many reference arms, and the light path of carrying out many reference arms is switched, and has improved general applicability greatly.
Above disclose only be the preferred embodiment among this utility model embodiment, can not limit the interest field of this utility model certainly with this, therefore the equivalent variations of being done according to this utility model claim still belongs to the scope that this utility model is contained.
Claims (10)
1. rotating disk that is in the light that is applied to frequency domain OCT system, it is characterized in that, comprise at least two segmental flabellums, described at least two segmental flabellums can be around same rotating shaft rotation, and the angle on two limits of described flabellum is identical with angle between adjacent two flabellums.
2. the rotating disk that is in the light as claimed in claim 1 is characterized in that, the described rotating disk that is in the light comprises 3 described flabellums, and the angle on two limits of described flabellum is 60 degree, and the angle between two adjacent flabellums is 60 degree.
3. the rotating disk that is in the light as claimed in claim 1 is characterized in that, every flabellum arc length equates.
4. as each described rotating disk that is in the light of claim 1-3, it is characterized in that the described rotating disk that is in the light also comprises with described rotating shaft and being connected to support the pedestal of described flabellum around described rotating shaft rotation.
5. a frequency domain OCT system is characterized in that, comprises each described rotating disk that is in the light as claim 1-3, and is connected to control the rotating mechanism of the described rotating disk rotation of being in the light with described rotating shaft.
6. frequency domain OCT as claimed in claim 5 system is characterized in that described rotating mechanism is a motor.
7. frequency domain OCT as claimed in claim 5 system is characterized in that, also comprises the lens and the plane mirror of two reference arms, each reference arm correspondence; The described rotating disk that is in the light is arranged between described lens and the described plane mirror, and the optical axis of described pair of reference arm input light and described rotating shaft are on same plane, and described input light arrives described plane mirror through described lens and the described rotating disk that is in the light.
8. frequency domain OCT as claimed in claim 7 system is characterized in that, also comprises the photoswitch that is connected with the described rotating disk that is in the light, and the data collecting card that is connected with described rotating mechanism with described photoswitch respectively.
9. frequency domain OCT as claimed in claim 8 system is characterized in that, also comprises sample, sample arm and sample arm scanning galvanometer, and described anterior ocular segment OCT system is by the scanning of the described sample arm scanning galvanometer of described data acquisition card control to described sample.
10. frequency domain OCT as claimed in claim 9 system is characterized in that described sample is the eyes anterior chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200676321U CN202010143U (en) | 2011-03-15 | 2011-03-15 | Light barring rotating disc used for frequency domain OCT system and frequency domain OCT system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200676321U CN202010143U (en) | 2011-03-15 | 2011-03-15 | Light barring rotating disc used for frequency domain OCT system and frequency domain OCT system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381091A (en) * | 2012-05-01 | 2013-11-06 | 佳能株式会社 | Ophthalmic apparatus |
| CN106725285A (en) * | 2017-01-06 | 2017-05-31 | 东北大学秦皇岛分校 | Optical coherence human eye measurement apparatus and human eye measuring method |
| CN110261309A (en) * | 2019-07-02 | 2019-09-20 | 东北大学秦皇岛分校 | A kind of magnetic driven optical coherence tomography system and its magnetic field modulation method |
| WO2022062049A1 (en) * | 2020-09-28 | 2022-03-31 | 温州医科大学 | Beam splitter-based imaging device integrating anterior segment oct and biometer functions |
-
2011
- 2011-03-15 CN CN2011200676321U patent/CN202010143U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103381091A (en) * | 2012-05-01 | 2013-11-06 | 佳能株式会社 | Ophthalmic apparatus |
| US8967802B2 (en) | 2012-05-01 | 2015-03-03 | Canon Kabushiki Kaisha | Ophthalmic apparatus |
| CN103381091B (en) * | 2012-05-01 | 2016-07-13 | 佳能株式会社 | Ophthalmologic apparatus |
| CN106725285A (en) * | 2017-01-06 | 2017-05-31 | 东北大学秦皇岛分校 | Optical coherence human eye measurement apparatus and human eye measuring method |
| CN106725285B (en) * | 2017-01-06 | 2019-01-11 | 东北大学秦皇岛分校 | Optical coherence human eye measuring device and human eye measurement method |
| CN110261309A (en) * | 2019-07-02 | 2019-09-20 | 东北大学秦皇岛分校 | A kind of magnetic driven optical coherence tomography system and its magnetic field modulation method |
| CN110261309B (en) * | 2019-07-02 | 2021-09-28 | 东北大学秦皇岛分校 | Magnetomotive optical coherence tomography system and magnetic field modulation method thereof |
| WO2022062049A1 (en) * | 2020-09-28 | 2022-03-31 | 温州医科大学 | Beam splitter-based imaging device integrating anterior segment oct and biometer functions |
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